Merge pull request #4903 from thaJeztah/carry_docs_no_internet

docs: include required tools in source tree

Makefile

@@ -67,20 +67,20 @@ dynbinary: ## build dynamically linked binary
 
 .PHONY: plugins
 plugins: ## build example CLI plugins
-	./scripts/build/plugins
+	scripts/build/plugins
 
 .PHONY: vendor
 vendor: ## update vendor with go modules
 	rm -rf vendor
-	./scripts/vendor update
+	scripts/with-go-mod.sh scripts/vendor update
 
 .PHONY: validate-vendor
 validate-vendor: ## validate vendor
-	./scripts/vendor validate
+	scripts/with-go-mod.sh scripts/vendor validate
 
 .PHONY: mod-outdated
 mod-outdated: ## check outdated dependencies
-	./scripts/vendor outdated
+	scripts/with-go-mod.sh scripts/vendor outdated
 
 .PHONY: authors
 authors: ## generate AUTHORS file from git history
@@ -115,15 +115,15 @@ shell-completion: ## generate shell-completion scripts
 
 .PHONY: manpages
 manpages: ## generate man pages from go source and markdown
-	scripts/docs/generate-man.sh
+	scripts/with-go-mod.sh scripts/docs/generate-man.sh
 
 .PHONY: mddocs
 mddocs: ## generate markdown files from go source
-	scripts/docs/generate-md.sh
+	scripts/with-go-mod.sh scripts/docs/generate-md.sh
 
 .PHONY: yamldocs
 yamldocs: ## generate documentation YAML files consumed by docs repo
-	scripts/docs/generate-yaml.sh
+	scripts/with-go-mod.sh scripts/docs/generate-yaml.sh
 
 .PHONY: help
 help: ## print this help

dockerfiles/Dockerfile.vendor

@@ -16,7 +16,7 @@ RUN --mount=target=/context \
     --mount=target=/go/pkg/mod,type=cache <<EOT
 set -e
 rsync -a /context/. .
-./scripts/vendor update
+./scripts/with-go-mod.sh ./scripts/vendor update
 mkdir /out
 cp -r vendor.mod vendor.sum vendor /out
 EOT
@@ -32,7 +32,7 @@ rsync -a /context/. .
 git add -A
 rm -rf vendor
 cp -rf /out/* .
-./scripts/vendor validate
+./scripts/with-go-mod.sh ./scripts/vendor validate
 EOT
 
 FROM psampaz/go-mod-outdated:${MODOUTDATED_VERSION} AS go-mod-outdated
@@ -40,4 +40,4 @@ FROM base AS outdated
 RUN --mount=target=.,rw \
     --mount=target=/go/pkg/mod,type=cache \
     --mount=from=go-mod-outdated,source=/home/go-mod-outdated,target=/usr/bin/go-mod-outdated \
-    ./scripts/vendor outdated
+    ./scripts/with-go-mod.sh ./scripts/vendor outdated

docs/generate/go.mod

@@ -1,13 +0,0 @@
-module github.com/docker/cli/docs/generate
-
-// dummy go.mod to avoid dealing with dependencies specific
-// to docs generation and not really part of the project.
-
-go 1.22.0
-
-//require (
-//	github.com/docker/cli v0.0.0+incompatible
-//	github.com/docker/cli-docs-tool v0.8.0
-//)
-//
-//replace github.com/docker/cli v0.0.0+incompatible => ../../

docs/generate/tools.go

@@ -1,7 +0,0 @@
-//go:build tools
-
-package main
-
-import (
-	_ "github.com/docker/cli-docs-tool"
-)

man/go.mod

@@ -1,15 +0,0 @@
-module github.com/docker/cli/man
-
-// dummy go.mod to avoid dealing with dependencies specific
-// to manpages generation and not really part of the project.
-
-go 1.12.0
-
-//require (
-//	github.com/docker/cli v0.0.0+incompatible
-//	github.com/cpuguy83/go-md2man/v2 v2.0.6
-//	github.com/spf13/cobra v1.2.1
-//	github.com/spf13/pflag v1.0.5
-//)
-//
-//replace github.com/docker/cli v0.0.0+incompatible => ../

man/tools.go

@@ -2,9 +2,4 @@
 
 package main
 
-import (
+import _ "github.com/cpuguy83/go-md2man/v2"
-	_ "github.com/cpuguy83/go-md2man/v2"
-	_ "github.com/spf13/cobra"
-	_ "github.com/spf13/cobra/doc"
-	_ "github.com/spf13/pflag"
-)

scripts/docs/generate-man.sh

@@ -2,37 +2,21 @@
 
 set -eu
 
-: "${MD2MAN_VERSION=v2.0.6}"
+: "${GO_MD2MAN:=go-md2man}"
 
-export GO111MODULE=auto
+if ! command -v "$GO_MD2MAN" > /dev/null; then
-
+  (
-function clean {
+    set -x
-  rm -rf "$buildir"
+    go build -mod=vendor -modfile=vendor.mod -o ./build/tools/go-md2man ./vendor/github.com/cpuguy83/go-md2man/v2
-}
+  )
-
+  GO_MD2MAN=$(realpath ./build/tools/go-md2man)
-buildir=$(mktemp -d -t docker-cli-docsgen.XXXXXXXXXX)
+fi
-trap clean EXIT
-
-(
-  set -x
-  cp -r . "$buildir/"
-  cd "$buildir"
-  # init dummy go.mod
-  ./scripts/vendor init
-  # install go-md2man and copy man/tools.go in root folder
-  # to be able to fetch the required dependencies
-  go mod edit -modfile=vendor.mod -require=github.com/cpuguy83/go-md2man/v2@${MD2MAN_VERSION}
-  cp man/tools.go .
-  # update vendor
-  ./scripts/vendor update
-  # build gen-manpages
-  go build -mod=vendor -modfile=vendor.mod -tags manpages -o /tmp/gen-manpages ./man/generate.go
-  # build go-md2man
-  go build -mod=vendor -modfile=vendor.mod -o /tmp/go-md2man ./vendor/github.com/cpuguy83/go-md2man/v2
-)
 
 mkdir -p man/man1
-(set -x ; /tmp/gen-manpages --root "." --target "$(pwd)/man/man1")
+(
+  set -x
+  go run -mod=vendor -modfile=vendor.mod -tags manpages ./man/generate.go --root "." --target "./man/man1"
+)
 
 (
   cd man
@@ -45,6 +29,9 @@ mkdir -p man/man1
       continue
     fi
     mkdir -p "./man${num}"
-    (set -x ; /tmp/go-md2man -in "$FILE" -out "./man${num}/${name}")
+    (
+      set -x ;
+      "$GO_MD2MAN" -in "$FILE" -out "./man${num}/${name}"
+    )
   done
 )

scripts/docs/generate-md.sh

@@ -2,36 +2,9 @@
 
 set -eu
 
-: "${CLI_DOCS_TOOL_VERSION=v0.9.0}"
-
-export GO111MODULE=auto
-
-function clean {
-  rm -rf "$buildir"
-}
-
-buildir=$(mktemp -d -t docker-cli-docsgen.XXXXXXXXXX)
-trap clean EXIT
-
 (
   set -x
-  cp -r . "$buildir/"
+  go run -mod=vendor -modfile=vendor.mod -tags docsgen ./docs/generate/generate.go --formats md --source "./docs/reference/commandline" --target "./docs/reference/commandline"
-  cd "$buildir"
-  # init dummy go.mod
-  ./scripts/vendor init
-  # install cli-docs-tool and copy docs/tools.go in root folder
-  # to be able to fetch the required dependencies
-  go mod edit -modfile=vendor.mod -require=github.com/docker/cli-docs-tool@${CLI_DOCS_TOOL_VERSION}
-  cp docs/generate/tools.go .
-  # update vendor
-  ./scripts/vendor update
-  # build docsgen
-  go build -mod=vendor -modfile=vendor.mod -tags docsgen -o /tmp/docsgen ./docs/generate/generate.go
-)
-
-(
-  set -x
-  /tmp/docsgen --formats md --source "$(pwd)/docs/reference/commandline" --target "$(pwd)/docs/reference/commandline"
 )
 
 # remove generated help.md file

scripts/docs/generate-yaml.sh

@@ -2,33 +2,6 @@
 
 set -eu
 
-: "${CLI_DOCS_TOOL_VERSION=v0.9.0}"
-
-export GO111MODULE=auto
-
-function clean {
-  rm -rf "$buildir"
-}
-
-buildir=$(mktemp -d -t docker-cli-docsgen.XXXXXXXXXX)
-trap clean EXIT
-
-(
-  set -x
-  cp -r . "$buildir/"
-  cd "$buildir"
-  # init dummy go.mod
-  ./scripts/vendor init
-  # install cli-docs-tool and copy docs/tools.go in root folder
-  # to be able to fetch the required dependencies
-  go mod edit -modfile=vendor.mod -require=github.com/docker/cli-docs-tool@${CLI_DOCS_TOOL_VERSION}
-  cp docs/generate/tools.go .
-  # update vendor
-  ./scripts/vendor update
-  # build docsgen
-  go build -mod=vendor -modfile=vendor.mod -tags docsgen -o /tmp/docsgen ./docs/generate/generate.go
-)
-
 mkdir -p docs/yaml
 set -x
-/tmp/docsgen --formats yaml --source "$(pwd)/docs/reference/commandline" --target "$(pwd)/docs/yaml"
+go run -mod=vendor -modfile=vendor.mod -tags docsgen ./docs/generate/generate.go --formats yaml --source "./docs/reference/commandline" --target "./docs/yaml"

scripts/vendor

@@ -13,15 +13,6 @@ if [ -z "$TYP" ]; then
   usage
 fi
 
-init() {
-  # create dummy go.mod, see comment in vendor.mod
-  cat > go.mod <<EOL
-module github.com/docker/cli
-
-go 1.23.0
-EOL
-}
-
 update() {
   (set -x ; go mod tidy -modfile=vendor.mod; go mod vendor -modfile=vendor.mod)
 }
@@ -44,20 +35,14 @@ outdated() {
 }
 
 case $TYP in
-  "init")
-    init
-    ;;
   "update")
-    init
     update
     ;;
   "validate")
-    init
     update
     validate
     ;;
   "outdated")
-    init
     outdated
     ;;
   *)

scripts/with-go-mod.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+#
+# This script is used to coerce certain commands which rely on the presence of
+# a go.mod into working with our repository. It works by creating a fake
+# go.mod, running a specified command (passed via arguments), and removing it
+# when the command is finished. This script should be dropped when this
+# repository is a proper Go module with a permanent go.mod.
+
+set -e
+
+SCRIPTDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOTDIR="$(cd "${SCRIPTDIR}/.." && pwd)"
+
+if test -e "${ROOTDIR}/go.mod"; then
+	{
+		scriptname=$(basename "$0")
+		cat >&2 <<- EOF
+			$scriptname: WARN: go.mod exists in the repository root!
+			$scriptname: WARN: Using your go.mod instead of our generated version -- this may misbehave!
+		EOF
+	} >&2
+else
+	set -x
+
+	tee "${ROOTDIR}/go.mod" >&2 <<- EOF
+		module github.com/docker/cli
+
+		go 1.23.0
+	EOF
+	trap 'rm -f "${ROOTDIR}/go.mod"' EXIT
+fi
+
+GO111MODULE=on GOTOOLCHAIN=local "$@"

vendor.mod

@@ -9,6 +9,7 @@ go 1.23.0
 require (
 	dario.cat/mergo v1.0.1
 	github.com/containerd/platforms v1.0.0-rc.1
+	github.com/cpuguy83/go-md2man/v2 v2.0.6
 	github.com/creack/pty v1.1.24
 	github.com/distribution/reference v0.6.0
 	github.com/docker/cli-docs-tool v0.9.0
@@ -88,6 +89,7 @@ require (
 	github.com/prometheus/common v0.55.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	go.etcd.io/etcd/raft/v3 v3.5.16 // indirect

vendor.sum

@@ -37,6 +37,8 @@ github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3
 github.com/containerd/platforms v1.0.0-rc.1 h1:83KIq4yy1erSRgOVHNk1HYdPvzdJ5CnsWaRoJX4C41E=
 github.com/containerd/platforms v1.0.0-rc.1/go.mod h1:J71L7B+aiM5SdIEqmd9wp6THLVRzJGXfNuWCZCllLA4=
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.6 h1:XJtiaUW6dEEqVuZiMTn1ldk455QWwEIsMIJlo5vtkx0=
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/creack/pty v1.1.24 h1:bJrF4RRfyJnbTJqzRLHzcGaZK1NeM5kTC9jGgovnR1s=
 github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
@@ -236,6 +238,7 @@ github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
 github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/sirupsen/logrus v1.0.6/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=

vendor/github.com/cpuguy83/go-md2man/v2/.gitignore

@@ -0,0 +1,2 @@
+go-md2man
+bin

vendor/github.com/cpuguy83/go-md2man/v2/.golangci.yml

@@ -0,0 +1,6 @@
+# For documentation, see https://golangci-lint.run/usage/configuration/
+
+linters:
+  enable:
+    - gofumpt
+

vendor/github.com/cpuguy83/go-md2man/v2/Dockerfile

@@ -0,0 +1,14 @@
+ARG GO_VERSION=1.21
+
+FROM --platform=${BUILDPLATFORM} golang:${GO_VERSION} AS build
+COPY . /go/src/github.com/cpuguy83/go-md2man
+WORKDIR /go/src/github.com/cpuguy83/go-md2man
+ARG TARGETOS TARGETARCH TARGETVARIANT
+RUN \
+    --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    make build
+
+FROM scratch
+COPY --from=build /go/src/github.com/cpuguy83/go-md2man/bin/go-md2man /go-md2man
+ENTRYPOINT ["/go-md2man"]

vendor/github.com/cpuguy83/go-md2man/v2/LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Brian Goff
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/cpuguy83/go-md2man/v2/Makefile

@@ -0,0 +1,49 @@
+GO111MODULE ?= on
+
+export GO111MODULE
+
+GOOS ?= $(if $(TARGETOS),$(TARGETOS),)
+GOARCH ?= $(if $(TARGETARCH),$(TARGETARCH),)
+
+ifeq ($(TARGETARCH),amd64)
+GOAMD64 ?= $(TARGETVARIANT)
+endif
+
+ifeq ($(TARGETARCH),arm)
+GOARM ?= $(TARGETVARIANT:v%=%)
+endif
+
+ifneq ($(GOOS),)
+export GOOS
+endif
+
+ifneq ($(GOARCH),)
+export GOARCH
+endif
+
+ifneq ($(GOAMD64),)
+export GOAMD64
+endif
+
+ifneq ($(GOARM),)
+export GOARM
+endif
+
+.PHONY:
+build: bin/go-md2man
+
+.PHONY: clean
+clean:
+	@rm -rf bin/*
+
+.PHONY: test
+test:
+	@go test $(TEST_FLAGS) ./...
+
+bin/go-md2man: go.mod go.sum md2man/* *.go
+	@mkdir -p bin
+	CGO_ENABLED=0 go build $(BUILD_FLAGS) -o $@
+
+.PHONY: mod
+mod:
+	@go mod tidy

vendor/github.com/cpuguy83/go-md2man/v2/README.md

@@ -0,0 +1,14 @@
+go-md2man
+=========
+
+Converts markdown into roff (man pages).
+
+Uses [blackfriday](https://github.com/russross/blackfriday) to process markdown into man pages.
+
+### Usage
+
+```bash
+go install github.com/cpuguy83/go-md2man@latest
+
+go-md2man -in /path/to/markdownfile.md -out /manfile/output/path
+```

vendor/github.com/cpuguy83/go-md2man/v2/go-md2man.1.md

@@ -0,0 +1,40 @@
+go-md2man 1 "January 2015" go-md2man "User Manual"
+==================================================
+
+# NAME
+go-md2man - Convert markdown files into manpages
+
+# SYNOPSIS
+**go-md2man** [**-in**=*/path/to/md/file*] [**-out**=*/path/to/output*]
+
+# DESCRIPTION
+**go-md2man** converts standard markdown formatted documents into manpages. It is
+written purely in Go so as to reduce dependencies on 3rd party libs.
+
+By default, the input is stdin and the output is stdout.
+
+# OPTIONS
+
+**-in=**_file_
+:   Path to markdown file to be processed.
+
+    Defaults to stdin.
+
+**-out=**_file_
+:   Path to output processed file.
+
+    Defaults to stdout.
+
+# EXAMPLES
+Convert the markdown file *go-md2man.1.md* into a manpage:
+```
+go-md2man < go-md2man.1.md > go-md2man.1
+```
+
+Same, but using command line arguments instead of shell redirection:
+```
+go-md2man -in=go-md2man.1.md -out=go-md2man.1
+```
+
+# HISTORY
+January 2015, Originally compiled by Brian Goff (cpuguy83@gmail.com).

vendor/github.com/cpuguy83/go-md2man/v2/md2man.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/cpuguy83/go-md2man/v2/md2man"
+)
+
+var (
+	inFilePath  = flag.String("in", "", "Path to file to be processed (default: stdin)")
+	outFilePath = flag.String("out", "", "Path to output processed file (default: stdout)")
+)
+
+func main() {
+	var err error
+	flag.Parse()
+
+	inFile := os.Stdin
+	if *inFilePath != "" {
+		inFile, err = os.Open(*inFilePath)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	}
+	defer inFile.Close() // nolint: errcheck
+
+	doc, err := ioutil.ReadAll(inFile)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	out := md2man.Render(doc)
+
+	outFile := os.Stdout
+	if *outFilePath != "" {
+		outFile, err = os.Create(*outFilePath)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		defer outFile.Close() // nolint: errcheck
+	}
+	_, err = outFile.Write(out)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}

vendor/github.com/cpuguy83/go-md2man/v2/md2man/debug.go

@@ -0,0 +1,62 @@
+package md2man
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/russross/blackfriday/v2"
+)
+
+func fmtListFlags(flags blackfriday.ListType) string {
+	knownFlags := []struct {
+		name string
+		flag blackfriday.ListType
+	}{
+		{"ListTypeOrdered", blackfriday.ListTypeOrdered},
+		{"ListTypeDefinition", blackfriday.ListTypeDefinition},
+		{"ListTypeTerm", blackfriday.ListTypeTerm},
+		{"ListItemContainsBlock", blackfriday.ListItemContainsBlock},
+		{"ListItemBeginningOfList", blackfriday.ListItemBeginningOfList},
+		{"ListItemEndOfList", blackfriday.ListItemEndOfList},
+	}
+
+	var f []string
+	for _, kf := range knownFlags {
+		if flags&kf.flag != 0 {
+			f = append(f, kf.name)
+			flags &^= kf.flag
+		}
+	}
+	if flags != 0 {
+		f = append(f, fmt.Sprintf("Unknown(%#x)", flags))
+	}
+	return strings.Join(f, "|")
+}
+
+type debugDecorator struct {
+	blackfriday.Renderer
+}
+
+func depth(node *blackfriday.Node) int {
+	d := 0
+	for n := node.Parent; n != nil; n = n.Parent {
+		d++
+	}
+	return d
+}
+
+func (d *debugDecorator) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+	fmt.Fprintf(os.Stderr, "%s%s %v %v\n",
+		strings.Repeat("  ", depth(node)),
+		map[bool]string{true: "+", false: "-"}[entering],
+		node,
+		fmtListFlags(node.ListFlags))
+	var b strings.Builder
+	status := d.Renderer.RenderNode(io.MultiWriter(&b, w), node, entering)
+	if b.Len() > 0 {
+		fmt.Fprintf(os.Stderr, ">> %q\n", b.String())
+	}
+	return status
+}

vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go

@@ -0,0 +1,23 @@
+package md2man
+
+import (
+	"os"
+	"strconv"
+
+	"github.com/russross/blackfriday/v2"
+)
+
+// Render converts a markdown document into a roff formatted document.
+func Render(doc []byte) []byte {
+	renderer := NewRoffRenderer()
+	var r blackfriday.Renderer = renderer
+	if v, _ := strconv.ParseBool(os.Getenv("MD2MAN_DEBUG")); v {
+		r = &debugDecorator{Renderer: r}
+	}
+
+	return blackfriday.Run(doc,
+		[]blackfriday.Option{
+			blackfriday.WithRenderer(r),
+			blackfriday.WithExtensions(renderer.GetExtensions()),
+		}...)
+}

vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go

@@ -0,0 +1,417 @@
+package md2man
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/russross/blackfriday/v2"
+)
+
+// roffRenderer implements the blackfriday.Renderer interface for creating
+// roff format (manpages) from markdown text
+type roffRenderer struct {
+	listCounters []int
+	firstHeader  bool
+	listDepth    int
+}
+
+const (
+	titleHeader       = ".TH "
+	topLevelHeader    = "\n\n.SH "
+	secondLevelHdr    = "\n.SH "
+	otherHeader       = "\n.SS "
+	crTag             = "\n"
+	emphTag           = "\\fI"
+	emphCloseTag      = "\\fP"
+	strongTag         = "\\fB"
+	strongCloseTag    = "\\fP"
+	breakTag          = "\n.br\n"
+	paraTag           = "\n.PP\n"
+	hruleTag          = "\n.ti 0\n\\l'\\n(.lu'\n"
+	linkTag           = "\n\\[la]"
+	linkCloseTag      = "\\[ra]"
+	codespanTag       = "\\fB"
+	codespanCloseTag  = "\\fR"
+	codeTag           = "\n.EX\n"
+	codeCloseTag      = ".EE\n" // Do not prepend a newline character since code blocks, by definition, include a newline already (or at least as how blackfriday gives us on).
+	quoteTag          = "\n.PP\n.RS\n"
+	quoteCloseTag     = "\n.RE\n"
+	listTag           = "\n.RS\n"
+	listCloseTag      = ".RE\n"
+	dtTag             = "\n.TP\n"
+	dd2Tag            = "\n"
+	tableStart        = "\n.TS\nallbox;\n"
+	tableEnd          = ".TE\n"
+	tableCellStart    = "T{\n"
+	tableCellEnd      = "\nT}\n"
+	tablePreprocessor = `'\" t`
+)
+
+// NewRoffRenderer creates a new blackfriday Renderer for generating roff documents
+// from markdown
+func NewRoffRenderer() *roffRenderer { // nolint: golint
+	return &roffRenderer{}
+}
+
+// GetExtensions returns the list of extensions used by this renderer implementation
+func (*roffRenderer) GetExtensions() blackfriday.Extensions {
+	return blackfriday.NoIntraEmphasis |
+		blackfriday.Tables |
+		blackfriday.FencedCode |
+		blackfriday.SpaceHeadings |
+		blackfriday.Footnotes |
+		blackfriday.Titleblock |
+		blackfriday.DefinitionLists
+}
+
+// RenderHeader handles outputting the header at document start
+func (r *roffRenderer) RenderHeader(w io.Writer, ast *blackfriday.Node) {
+	// We need to walk the tree to check if there are any tables.
+	// If there are, we need to enable the roff table preprocessor.
+	ast.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+		if node.Type == blackfriday.Table {
+			out(w, tablePreprocessor+"\n")
+			return blackfriday.Terminate
+		}
+		return blackfriday.GoToNext
+	})
+
+	// disable hyphenation
+	out(w, ".nh\n")
+}
+
+// RenderFooter handles outputting the footer at the document end; the roff
+// renderer has no footer information
+func (r *roffRenderer) RenderFooter(w io.Writer, ast *blackfriday.Node) {
+}
+
+// RenderNode is called for each node in a markdown document; based on the node
+// type the equivalent roff output is sent to the writer
+func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+	walkAction := blackfriday.GoToNext
+
+	switch node.Type {
+	case blackfriday.Text:
+		// Special case: format the NAME section as required for proper whatis parsing.
+		// Refer to the lexgrog(1) and groff_man(7) manual pages for details.
+		if node.Parent != nil &&
+			node.Parent.Type == blackfriday.Paragraph &&
+			node.Parent.Prev != nil &&
+			node.Parent.Prev.Type == blackfriday.Heading &&
+			node.Parent.Prev.FirstChild != nil &&
+			bytes.EqualFold(node.Parent.Prev.FirstChild.Literal, []byte("NAME")) {
+			before, after, found := bytesCut(node.Literal, []byte(" - "))
+			escapeSpecialChars(w, before)
+			if found {
+				out(w, ` \- `)
+				escapeSpecialChars(w, after)
+			}
+		} else {
+			escapeSpecialChars(w, node.Literal)
+		}
+	case blackfriday.Softbreak:
+		out(w, crTag)
+	case blackfriday.Hardbreak:
+		out(w, breakTag)
+	case blackfriday.Emph:
+		if entering {
+			out(w, emphTag)
+		} else {
+			out(w, emphCloseTag)
+		}
+	case blackfriday.Strong:
+		if entering {
+			out(w, strongTag)
+		} else {
+			out(w, strongCloseTag)
+		}
+	case blackfriday.Link:
+		// Don't render the link text for automatic links, because this
+		// will only duplicate the URL in the roff output.
+		// See https://daringfireball.net/projects/markdown/syntax#autolink
+		if !bytes.Equal(node.LinkData.Destination, node.FirstChild.Literal) {
+			out(w, string(node.FirstChild.Literal))
+		}
+		// Hyphens in a link must be escaped to avoid word-wrap in the rendered man page.
+		escapedLink := strings.ReplaceAll(string(node.LinkData.Destination), "-", "\\-")
+		out(w, linkTag+escapedLink+linkCloseTag)
+		walkAction = blackfriday.SkipChildren
+	case blackfriday.Image:
+		// ignore images
+		walkAction = blackfriday.SkipChildren
+	case blackfriday.Code:
+		out(w, codespanTag)
+		escapeSpecialChars(w, node.Literal)
+		out(w, codespanCloseTag)
+	case blackfriday.Document:
+		break
+	case blackfriday.Paragraph:
+		if entering {
+			if r.listDepth > 0 {
+				// roff .PP markers break lists
+				if node.Prev != nil { // continued paragraph
+					if node.Prev.Type == blackfriday.List && node.Prev.ListFlags&blackfriday.ListTypeDefinition == 0 {
+						out(w, ".IP\n")
+					} else {
+						out(w, crTag)
+					}
+				}
+			} else if node.Prev != nil && node.Prev.Type == blackfriday.Heading {
+				out(w, crTag)
+			} else {
+				out(w, paraTag)
+			}
+		} else {
+			if node.Next == nil || node.Next.Type != blackfriday.List {
+				out(w, crTag)
+			}
+		}
+	case blackfriday.BlockQuote:
+		if entering {
+			out(w, quoteTag)
+		} else {
+			out(w, quoteCloseTag)
+		}
+	case blackfriday.Heading:
+		r.handleHeading(w, node, entering)
+	case blackfriday.HorizontalRule:
+		out(w, hruleTag)
+	case blackfriday.List:
+		r.handleList(w, node, entering)
+	case blackfriday.Item:
+		r.handleItem(w, node, entering)
+	case blackfriday.CodeBlock:
+		out(w, codeTag)
+		escapeSpecialChars(w, node.Literal)
+		out(w, codeCloseTag)
+	case blackfriday.Table:
+		r.handleTable(w, node, entering)
+	case blackfriday.TableHead:
+	case blackfriday.TableBody:
+	case blackfriday.TableRow:
+		// no action as cell entries do all the nroff formatting
+		return blackfriday.GoToNext
+	case blackfriday.TableCell:
+		r.handleTableCell(w, node, entering)
+	case blackfriday.HTMLSpan:
+		// ignore other HTML tags
+	case blackfriday.HTMLBlock:
+		if bytes.HasPrefix(node.Literal, []byte("<!--")) {
+			break // ignore comments, no warning
+		}
+		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
+	default:
+		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
+	}
+	return walkAction
+}
+
+func (r *roffRenderer) handleHeading(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		switch node.Level {
+		case 1:
+			if !r.firstHeader {
+				out(w, titleHeader)
+				r.firstHeader = true
+				break
+			}
+			out(w, topLevelHeader)
+		case 2:
+			out(w, secondLevelHdr)
+		default:
+			out(w, otherHeader)
+		}
+	}
+}
+
+func (r *roffRenderer) handleList(w io.Writer, node *blackfriday.Node, entering bool) {
+	openTag := listTag
+	closeTag := listCloseTag
+	if (entering && r.listDepth == 0) || (!entering && r.listDepth == 1) {
+		openTag = crTag
+		closeTag = ""
+	}
+	if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
+		// tags for definition lists handled within Item node
+		openTag = ""
+		closeTag = ""
+	}
+	if entering {
+		r.listDepth++
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			r.listCounters = append(r.listCounters, 1)
+		}
+		out(w, openTag)
+	} else {
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			r.listCounters = r.listCounters[:len(r.listCounters)-1]
+		}
+		out(w, closeTag)
+		r.listDepth--
+	}
+}
+
+func (r *roffRenderer) handleItem(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			out(w, fmt.Sprintf(".IP \"%3d.\" 5\n", r.listCounters[len(r.listCounters)-1]))
+			r.listCounters[len(r.listCounters)-1]++
+		} else if node.ListFlags&blackfriday.ListTypeTerm != 0 {
+			// DT (definition term): line just before DD (see below).
+			out(w, dtTag)
+		} else if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
+			// DD (definition description): line that starts with ": ".
+			//
+			// We have to distinguish between the first DD and the
+			// subsequent ones, as there should be no vertical
+			// whitespace between the DT and the first DD.
+			if node.Prev != nil && node.Prev.ListFlags&(blackfriday.ListTypeTerm|blackfriday.ListTypeDefinition) == blackfriday.ListTypeDefinition {
+				if node.Prev.Type == blackfriday.Item &&
+					node.Prev.LastChild != nil &&
+					node.Prev.LastChild.Type == blackfriday.List &&
+					node.Prev.LastChild.ListFlags&blackfriday.ListTypeDefinition == 0 {
+					out(w, ".IP\n")
+				} else {
+					out(w, dd2Tag)
+				}
+			}
+		} else {
+			out(w, ".IP \\(bu 2\n")
+		}
+	}
+}
+
+func (r *roffRenderer) handleTable(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		out(w, tableStart)
+		// call walker to count cells (and rows?) so format section can be produced
+		columns := countColumns(node)
+		out(w, strings.Repeat("l ", columns)+"\n")
+		out(w, strings.Repeat("l ", columns)+".\n")
+	} else {
+		out(w, tableEnd)
+	}
+}
+
+func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		var start string
+		if node.Prev != nil && node.Prev.Type == blackfriday.TableCell {
+			start = "\t"
+		}
+		if node.IsHeader {
+			start += strongTag
+		} else if nodeLiteralSize(node) > 30 {
+			start += tableCellStart
+		}
+		out(w, start)
+	} else {
+		var end string
+		if node.IsHeader {
+			end = strongCloseTag
+		} else if nodeLiteralSize(node) > 30 {
+			end = tableCellEnd
+		}
+		if node.Next == nil && end != tableCellEnd {
+			// Last cell: need to carriage return if we are at the end of the
+			// header row and content isn't wrapped in a "tablecell"
+			end += crTag
+		}
+		out(w, end)
+	}
+}
+
+func nodeLiteralSize(node *blackfriday.Node) int {
+	total := 0
+	for n := node.FirstChild; n != nil; n = n.FirstChild {
+		total += len(n.Literal)
+	}
+	return total
+}
+
+// because roff format requires knowing the column count before outputting any table
+// data we need to walk a table tree and count the columns
+func countColumns(node *blackfriday.Node) int {
+	var columns int
+
+	node.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+		switch node.Type {
+		case blackfriday.TableRow:
+			if !entering {
+				return blackfriday.Terminate
+			}
+		case blackfriday.TableCell:
+			if entering {
+				columns++
+			}
+		default:
+		}
+		return blackfriday.GoToNext
+	})
+	return columns
+}
+
+func out(w io.Writer, output string) {
+	io.WriteString(w, output) // nolint: errcheck
+}
+
+func escapeSpecialChars(w io.Writer, text []byte) {
+	scanner := bufio.NewScanner(bytes.NewReader(text))
+
+	// count the number of lines in the text
+	// we need to know this to avoid adding a newline after the last line
+	n := bytes.Count(text, []byte{'\n'})
+	idx := 0
+
+	for scanner.Scan() {
+		dt := scanner.Bytes()
+		if idx < n {
+			idx++
+			dt = append(dt, '\n')
+		}
+		escapeSpecialCharsLine(w, dt)
+	}
+
+	if err := scanner.Err(); err != nil {
+		panic(err)
+	}
+}
+
+func escapeSpecialCharsLine(w io.Writer, text []byte) {
+	for i := 0; i < len(text); i++ {
+		// escape initial apostrophe or period
+		if len(text) >= 1 && (text[0] == '\'' || text[0] == '.') {
+			out(w, "\\&")
+		}
+
+		// directly copy normal characters
+		org := i
+
+		for i < len(text) && text[i] != '\\' {
+			i++
+		}
+		if i > org {
+			w.Write(text[org:i]) // nolint: errcheck
+		}
+
+		// escape a character
+		if i >= len(text) {
+			break
+		}
+
+		w.Write([]byte{'\\', text[i]}) // nolint: errcheck
+	}
+}
+
+// bytesCut is a copy of [bytes.Cut] to provide compatibility with go1.17
+// and older. We can remove this once we drop support  for go1.17 and older.
+func bytesCut(s, sep []byte) (before, after []byte, found bool) {
+	if i := bytes.Index(s, sep); i >= 0 {
+		return s[:i], s[i+len(sep):], true
+	}
+	return s, nil, false
+}

vendor/github.com/docker/cli-docs-tool/.dockerignore

@@ -0,0 +1,2 @@
+/coverage.txt
+/example/docs

vendor/github.com/docker/cli-docs-tool/.gitignore

@@ -0,0 +1,2 @@
+/coverage.txt
+/example/docs

vendor/github.com/docker/cli-docs-tool/.golangci.yml

@@ -0,0 +1,34 @@
+run:
+  timeout: 10m
+
+linters:
+  enable:
+    - depguard
+    - gofmt
+    - goimports
+    - revive
+    - govet
+    - importas
+    - ineffassign
+    - misspell
+    - typecheck
+    - errname
+    - makezero
+    - whitespace
+  disable-all: true
+
+linters-settings:
+  depguard:
+    rules:
+      main:
+        deny:
+          - pkg: io/ioutil
+            desc: The io/ioutil package has been deprecated, see https://go.dev/doc/go1.16#ioutil
+  importas:
+    no-unaliased: true
+
+issues:
+  exclude-rules:
+    - linters:
+        - revive
+      text: "stutters"

vendor/github.com/docker/cli-docs-tool/Dockerfile

@@ -0,0 +1,103 @@
+# syntax=docker/dockerfile:1
+
+# Copyright 2021 cli-docs-tool authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+ARG GO_VERSION="1.23"
+ARG XX_VERSION="1.6.1"
+ARG GOLANGCI_LINT_VERSION="v1.62"
+ARG ADDLICENSE_VERSION="v1.1.1"
+
+ARG LICENSE_ARGS="-c cli-docs-tool -l apache"
+ARG LICENSE_FILES=".*\(Dockerfile\|\.go\|\.hcl\|\.sh\)"
+
+FROM golangci/golangci-lint:${GOLANGCI_LINT_VERSION}-alpine AS golangci-lint
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
+
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS base
+RUN apk add --no-cache cpio findutils git linux-headers
+ENV CGO_ENABLED=0
+WORKDIR /src
+COPY --link --from=xx / /
+
+FROM base AS addlicense
+ARG ADDLICENSE_VERSION
+ARG TARGETPLATFORM
+RUN --mount=target=/root/.cache,type=cache \
+    --mount=type=cache,target=/go/pkg/mod <<EOT
+  set -ex
+  xx-go install "github.com/google/addlicense@${ADDLICENSE_VERSION}"
+  mkdir /out
+  if ! xx-info is-cross; then
+    mv /go/bin/addlicense /out
+  else
+    mv /go/bin/*/addlicense* /out
+  fi
+EOT
+
+FROM base AS vendored
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/go/pkg/mod \
+  go mod tidy && go mod download && \
+  mkdir /out && cp go.mod go.sum /out
+
+FROM scratch AS vendor-update
+COPY --from=vendored /out /
+
+FROM vendored AS vendor-validate
+RUN --mount=type=bind,target=.,rw <<EOT
+  set -e
+  git add -A
+  cp -rf /out/* .
+  diff=$(git status --porcelain -- go.mod go.sum)
+  if [ -n "$diff" ]; then
+    echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor"'
+    echo "$diff"
+    exit 1
+  fi
+EOT
+
+FROM base AS lint
+RUN --mount=type=bind,target=. \
+  --mount=type=cache,target=/root/.cache \
+  --mount=from=golangci-lint,source=/usr/bin/golangci-lint,target=/usr/bin/golangci-lint \
+  golangci-lint run ./...
+
+FROM base AS license-set
+ARG LICENSE_ARGS
+ARG LICENSE_FILES
+RUN --mount=type=bind,target=.,rw \
+  --mount=from=addlicense,source=/out/addlicense,target=/usr/bin/addlicense \
+  find . -regex "${LICENSE_FILES}" | xargs addlicense ${LICENSE_ARGS} \
+  && mkdir /out \
+  && find . -regex "${LICENSE_FILES}" | cpio -pdm /out
+
+FROM scratch AS license-update
+COPY --from=set /out /
+
+FROM base AS license-validate
+ARG LICENSE_ARGS
+ARG LICENSE_FILES
+RUN --mount=type=bind,target=. \
+  --mount=from=addlicense,source=/out/addlicense,target=/usr/bin/addlicense \
+  find . -regex "${LICENSE_FILES}" | xargs addlicense -check ${LICENSE_ARGS}
+
+FROM vendored AS test
+RUN --mount=type=bind,target=. \
+  --mount=type=cache,target=/root/.cache \
+  --mount=type=cache,target=/go/pkg/mod \
+  go test -v -coverprofile=/tmp/coverage.txt -covermode=atomic ./...
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage.txt /coverage.txt

vendor/github.com/docker/cli-docs-tool/README.md

@@ -0,0 +1,67 @@
+[![PkgGoDev](https://img.shields.io/badge/go.dev-docs-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/docker/cli-docs-tool)
+[![Test Status](https://img.shields.io/github/actions/workflow/status/docker/cli-docs-tool/test.yml?branch=main&label=test&logo=github&style=flat-square)](https://github.com/docker/cli-docs-tool/actions?query=workflow%3Atest)
+[![Go Report Card](https://goreportcard.com/badge/github.com/docker/cli-docs-tool)](https://goreportcard.com/report/github.com/docker/cli-docs-tool)
+
+## About
+
+This is a library containing utilities to generate (reference) documentation
+for the [`docker` CLI](https://github.com/docker/cli) on [docs.docker.com](https://docs.docker.com/reference/).
+
+## Disclaimer
+
+This library is intended for use by Docker's CLIs, and is not intended to be a
+general-purpose utility. Various bits are hard-coded or make assumptions that
+are very specific to our use-case. Contributions are welcome, but we will not
+accept contributions to make this a general-purpose module.
+
+## Usage
+
+To generate the documentation it's recommended to do so using a Go submodule
+in your repository.
+
+We will use the example of `docker/buildx` and create a Go submodule in a
+`docs` folder (recommended):
+
+```console
+$ mkdir docs
+$ cd ./docs
+$ go mod init github.com/docker/buildx/docs
+$ go get github.com/docker/cli-docs-tool
+```
+
+Your `go.mod` should look like this:
+
+```text
+module github.com/docker/buildx/docs
+
+go 1.16
+
+require (
+	github.com/docker/cli-docs-tool v0.0.0
+)
+```
+
+Next, create a file named `main.go` inside that directory containing the
+following Go code from [`example/main.go`](example/main.go).
+
+Running this example should produce the following output:
+
+```console
+$ go run main.go
+INFO: Generating Markdown for "docker buildx bake"
+INFO: Generating Markdown for "docker buildx build"
+INFO: Generating Markdown for "docker buildx create"
+INFO: Generating Markdown for "docker buildx du"
+...
+INFO: Generating YAML for "docker buildx uninstall"
+INFO: Generating YAML for "docker buildx use"
+INFO: Generating YAML for "docker buildx version"
+INFO: Generating YAML for "docker buildx"
+```
+
+Generated docs will be available in the `./docs` folder of the project.
+
+## Contributing
+
+Want to contribute? Awesome! You can find information about contributing to
+this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)

vendor/github.com/docker/cli-docs-tool/clidocstool.go

@@ -0,0 +1,191 @@
+// Copyright 2017 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clidocstool
+
+import (
+	"errors"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+// Options defines options for cli-docs-tool
+type Options struct {
+	Root      *cobra.Command
+	SourceDir string
+	TargetDir string
+	Plugin    bool
+
+	ManHeader *doc.GenManHeader
+}
+
+// Client represents an active cli-docs-tool object
+type Client struct {
+	root   *cobra.Command
+	source string
+	target string
+	plugin bool
+
+	manHeader *doc.GenManHeader
+}
+
+// New initializes a new cli-docs-tool client
+func New(opts Options) (*Client, error) {
+	if opts.Root == nil {
+		return nil, errors.New("root cmd required")
+	}
+	if len(opts.SourceDir) == 0 {
+		return nil, errors.New("source dir required")
+	}
+	c := &Client{
+		root:      opts.Root,
+		source:    opts.SourceDir,
+		plugin:    opts.Plugin,
+		manHeader: opts.ManHeader,
+	}
+	if len(opts.TargetDir) == 0 {
+		c.target = c.source
+	} else {
+		c.target = opts.TargetDir
+	}
+	if err := os.MkdirAll(c.target, 0o755); err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+// GenAllTree creates all structured ref files for this command and
+// all descendants in the directory given.
+func (c *Client) GenAllTree() error {
+	var err error
+	if err = c.GenMarkdownTree(c.root); err != nil {
+		return err
+	}
+	if err = c.GenYamlTree(c.root); err != nil {
+		return err
+	}
+	if err = c.GenManTree(c.root); err != nil {
+		return err
+	}
+	return nil
+}
+
+// loadLongDescription gets long descriptions and examples from markdown.
+func (c *Client) loadLongDescription(cmd *cobra.Command, generator string) error {
+	if cmd.HasSubCommands() {
+		for _, sub := range cmd.Commands() {
+			if err := c.loadLongDescription(sub, generator); err != nil {
+				return err
+			}
+		}
+	}
+	name := cmd.CommandPath()
+	if i := strings.Index(name, " "); i >= 0 {
+		// remove root command / binary name
+		name = name[i+1:]
+	}
+	if name == "" {
+		return nil
+	}
+	mdFile := strings.ReplaceAll(name, " ", "_") + ".md"
+	sourcePath := filepath.Join(c.source, mdFile)
+	content, err := os.ReadFile(sourcePath)
+	if os.IsNotExist(err) {
+		log.Printf("WARN: %s does not exist, skipping Markdown examples for %s docs\n", mdFile, generator)
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+	applyDescriptionAndExamples(cmd, string(content))
+	return nil
+}
+
+// applyDescriptionAndExamples fills in cmd.Long and cmd.Example with the
+// "Description" and "Examples" H2 sections in  mdString (if present).
+func applyDescriptionAndExamples(cmd *cobra.Command, mdString string) {
+	sections := getSections(mdString)
+	var (
+		anchors []string
+		md      string
+	)
+	if sections["description"] != "" {
+		md, anchors = cleanupMarkDown(sections["description"])
+		cmd.Long = md
+		anchors = append(anchors, md)
+	}
+	if sections["examples"] != "" {
+		md, anchors = cleanupMarkDown(sections["examples"])
+		cmd.Example = md
+		anchors = append(anchors, md)
+	}
+	if len(anchors) > 0 {
+		if cmd.Annotations == nil {
+			cmd.Annotations = make(map[string]string)
+		}
+		cmd.Annotations["anchors"] = strings.Join(anchors, ",")
+	}
+}
+
+func fileExists(f string) bool {
+	info, err := os.Stat(f)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return !info.IsDir()
+}
+
+func copyFile(src string, dst string) error {
+	sf, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer sf.Close()
+	df, err := os.OpenFile(dst, os.O_CREATE|os.O_WRONLY, 0o600)
+	if err != nil {
+		return err
+	}
+	defer df.Close()
+	_, err = io.Copy(df, sf)
+	return err
+}
+
+func getAliases(cmd *cobra.Command) []string {
+	if a := cmd.Annotations["aliases"]; a != "" {
+		aliases := strings.Split(a, ",")
+		for i := 0; i < len(aliases); i++ {
+			aliases[i] = strings.TrimSpace(aliases[i])
+		}
+		return aliases
+	}
+	if len(cmd.Aliases) == 0 {
+		return cmd.Aliases
+	}
+
+	var parentPath string
+	if cmd.HasParent() {
+		parentPath = cmd.Parent().CommandPath() + " "
+	}
+	aliases := []string{cmd.CommandPath()}
+	for _, a := range cmd.Aliases {
+		aliases = append(aliases, parentPath+a)
+	}
+	return aliases
+}

vendor/github.com/docker/cli-docs-tool/clidocstool_man.go

@@ -0,0 +1,74 @@
+// Copyright 2016 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clidocstool
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+// GenManTree generates a man page for the command and all descendants.
+// If SOURCE_DATE_EPOCH is set, in order to allow reproducible package
+// builds, we explicitly set the build time to SOURCE_DATE_EPOCH.
+func (c *Client) GenManTree(cmd *cobra.Command) error {
+	if err := c.loadLongDescription(cmd, "man"); err != nil {
+		return err
+	}
+
+	if epoch := os.Getenv("SOURCE_DATE_EPOCH"); c.manHeader != nil && epoch != "" {
+		unixEpoch, err := strconv.ParseInt(epoch, 10, 64)
+		if err != nil {
+			return fmt.Errorf("invalid SOURCE_DATE_EPOCH: %v", err)
+		}
+		now := time.Unix(unixEpoch, 0)
+		c.manHeader.Date = &now
+	}
+
+	return c.genManTreeCustom(cmd)
+}
+
+func (c *Client) genManTreeCustom(cmd *cobra.Command) error {
+	for _, sc := range cmd.Commands() {
+		if err := c.genManTreeCustom(sc); err != nil {
+			return err
+		}
+	}
+
+	// always disable the addition of [flags] to the usage
+	cmd.DisableFlagsInUseLine = true
+
+	// always disable "spf13/cobra" auto gen tag
+	cmd.DisableAutoGenTag = true
+
+	// Skip the root command altogether, to prevent generating a useless
+	// md file for plugins.
+	if c.plugin && !cmd.HasParent() {
+		return nil
+	}
+
+	log.Printf("INFO: Generating Man for %q", cmd.CommandPath())
+
+	return doc.GenManTreeFromOpts(cmd, doc.GenManTreeOptions{
+		Header:           c.manHeader,
+		Path:             c.target,
+		CommandSeparator: "-",
+	})
+}

vendor/github.com/docker/cli-docs-tool/clidocstool_md.go

@@ -0,0 +1,277 @@
+// Copyright 2021 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clidocstool
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"text/tabwriter"
+	"text/template"
+
+	"github.com/docker/cli-docs-tool/annotation"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+var (
+	nlRegexp  = regexp.MustCompile(`\r?\n`)
+	adjustSep = regexp.MustCompile(`\|:---(\s+)`)
+)
+
+// GenMarkdownTree will generate a markdown page for this command and all
+// descendants in the directory given.
+func (c *Client) GenMarkdownTree(cmd *cobra.Command) error {
+	for _, sc := range cmd.Commands() {
+		if err := c.GenMarkdownTree(sc); err != nil {
+			return err
+		}
+	}
+
+	// always disable the addition of [flags] to the usage
+	cmd.DisableFlagsInUseLine = true
+
+	// Skip the root command altogether, to prevent generating a useless
+	// md file for plugins.
+	if c.plugin && !cmd.HasParent() {
+		return nil
+	}
+
+	// Skip hidden command
+	if cmd.Hidden {
+		log.Printf("INFO: Skipping Markdown for %q (hidden command)", cmd.CommandPath())
+		return nil
+	}
+
+	log.Printf("INFO: Generating Markdown for %q", cmd.CommandPath())
+	mdFile := mdFilename(cmd)
+	sourcePath := filepath.Join(c.source, mdFile)
+	targetPath := filepath.Join(c.target, mdFile)
+
+	// check recursively to handle inherited annotations
+	for curr := cmd; curr != nil; curr = curr.Parent() {
+		if _, ok := cmd.Annotations[annotation.CodeDelimiter]; !ok {
+			if cd, cok := curr.Annotations[annotation.CodeDelimiter]; cok {
+				if cmd.Annotations == nil {
+					cmd.Annotations = map[string]string{}
+				}
+				cmd.Annotations[annotation.CodeDelimiter] = cd
+			}
+		}
+	}
+
+	if !fileExists(sourcePath) {
+		var icBuf bytes.Buffer
+		icTpl, err := template.New("ic").Option("missingkey=error").Parse(`# {{ .Command }}
+
+<!---MARKER_GEN_START-->
+<!---MARKER_GEN_END-->
+
+`)
+		if err != nil {
+			return err
+		}
+		if err = icTpl.Execute(&icBuf, struct {
+			Command string
+		}{
+			Command: cmd.CommandPath(),
+		}); err != nil {
+			return err
+		}
+		if err = os.WriteFile(targetPath, icBuf.Bytes(), 0o644); err != nil {
+			return err
+		}
+	} else if err := copyFile(sourcePath, targetPath); err != nil {
+		return err
+	}
+
+	content, err := os.ReadFile(targetPath)
+	if err != nil {
+		return err
+	}
+
+	cs := string(content)
+
+	start := strings.Index(cs, "<!---MARKER_GEN_START-->")
+	end := strings.Index(cs, "<!---MARKER_GEN_END-->")
+
+	if start == -1 {
+		return fmt.Errorf("no start marker in %s", mdFile)
+	}
+	if end == -1 {
+		return fmt.Errorf("no end marker in %s", mdFile)
+	}
+
+	out, err := mdCmdOutput(cmd, cs)
+	if err != nil {
+		return err
+	}
+	cont := cs[:start] + "<!---MARKER_GEN_START-->" + "\n" + out + "\n" + cs[end:]
+
+	fi, err := os.Stat(targetPath)
+	if err != nil {
+		return err
+	}
+	if err = os.WriteFile(targetPath, []byte(cont), fi.Mode()); err != nil {
+		return fmt.Errorf("failed to write %s: %w", targetPath, err)
+	}
+
+	return nil
+}
+
+func mdFilename(cmd *cobra.Command) string {
+	name := cmd.CommandPath()
+	if i := strings.Index(name, " "); i >= 0 {
+		name = name[i+1:]
+	}
+	return strings.ReplaceAll(name, " ", "_") + ".md"
+}
+
+func mdMakeLink(txt, link string, f *pflag.Flag, isAnchor bool) string {
+	link = "#" + link
+	annotations, ok := f.Annotations[annotation.ExternalURL]
+	if ok && len(annotations) > 0 {
+		link = annotations[0]
+	} else {
+		if !isAnchor {
+			return txt
+		}
+	}
+
+	return "[" + txt + "](" + link + ")"
+}
+
+type mdTable struct {
+	out       *strings.Builder
+	tabWriter *tabwriter.Writer
+}
+
+func newMdTable(headers ...string) *mdTable {
+	w := &strings.Builder{}
+	t := &mdTable{
+		out: w,
+		// Using tabwriter.Debug, which uses "|" as separator instead of tabs,
+		// which is what we want. It's a bit of a hack, but does the job :)
+		tabWriter: tabwriter.NewWriter(w, 5, 5, 1, ' ', tabwriter.Debug),
+	}
+	t.addHeader(headers...)
+	return t
+}
+
+func (t *mdTable) addHeader(cols ...string) {
+	t.AddRow(cols...)
+	_, _ = t.tabWriter.Write([]byte("|" + strings.Repeat(":---\t", len(cols)) + "\n"))
+}
+
+func (t *mdTable) AddRow(cols ...string) {
+	for i := range cols {
+		cols[i] = mdEscapePipe(cols[i])
+	}
+	_, _ = t.tabWriter.Write([]byte("| " + strings.Join(cols, "\t ") + "\t\n"))
+}
+
+func (t *mdTable) String() string {
+	_ = t.tabWriter.Flush()
+	return adjustSep.ReplaceAllStringFunc(t.out.String()+"\n", func(in string) string {
+		return strings.ReplaceAll(in, " ", "-")
+	})
+}
+
+func mdCmdOutput(cmd *cobra.Command, old string) (string, error) {
+	b := &strings.Builder{}
+
+	desc := cmd.Short
+	if cmd.Long != "" {
+		desc = cmd.Long
+	}
+	if desc != "" {
+		b.WriteString(desc + "\n\n")
+	}
+
+	if aliases := getAliases(cmd); len(aliases) != 0 {
+		b.WriteString("### Aliases\n\n")
+		b.WriteString("`" + strings.Join(aliases, "`, `") + "`")
+		b.WriteString("\n\n")
+	}
+
+	if len(cmd.Commands()) != 0 {
+		b.WriteString("### Subcommands\n\n")
+		table := newMdTable("Name", "Description")
+		for _, c := range cmd.Commands() {
+			if c.Hidden {
+				continue
+			}
+			table.AddRow(fmt.Sprintf("[`%s`](%s)", c.Name(), mdFilename(c)), c.Short)
+		}
+		b.WriteString(table.String() + "\n")
+	}
+
+	// add inherited flags before checking for flags availability
+	cmd.Flags().AddFlagSet(cmd.InheritedFlags())
+
+	if cmd.Flags().HasAvailableFlags() {
+		b.WriteString("### Options\n\n")
+		table := newMdTable("Name", "Type", "Default", "Description")
+		cmd.Flags().VisitAll(func(f *pflag.Flag) {
+			if f.Hidden {
+				return
+			}
+			isLink := strings.Contains(old, "<a name=\""+f.Name+"\"></a>")
+			var name string
+			if f.Shorthand != "" {
+				name = mdMakeLink("`-"+f.Shorthand+"`", f.Name, f, isLink)
+				name += ", "
+			}
+			name += mdMakeLink("`--"+f.Name+"`", f.Name, f, isLink)
+
+			ftype := "`" + f.Value.Type() + "`"
+
+			var defval string
+			if v, ok := f.Annotations[annotation.DefaultValue]; ok && len(v) > 0 {
+				defval = v[0]
+				if cd, ok := f.Annotations[annotation.CodeDelimiter]; ok {
+					defval = strings.ReplaceAll(defval, cd[0], "`")
+				} else if cd, ok := cmd.Annotations[annotation.CodeDelimiter]; ok {
+					defval = strings.ReplaceAll(defval, cd, "`")
+				}
+			} else if f.DefValue != "" && ((f.Value.Type() != "bool" && f.DefValue != "true") || (f.Value.Type() == "bool" && f.DefValue == "true")) && f.DefValue != "[]" {
+				defval = "`" + f.DefValue + "`"
+			}
+
+			usage := f.Usage
+			if cd, ok := f.Annotations[annotation.CodeDelimiter]; ok {
+				usage = strings.ReplaceAll(usage, cd[0], "`")
+			} else if cd, ok := cmd.Annotations[annotation.CodeDelimiter]; ok {
+				usage = strings.ReplaceAll(usage, cd, "`")
+			}
+			table.AddRow(name, ftype, defval, mdReplaceNewline(usage))
+		})
+		b.WriteString(table.String())
+	}
+
+	return b.String(), nil
+}
+
+func mdEscapePipe(s string) string {
+	return strings.ReplaceAll(s, `|`, `\|`)
+}
+
+func mdReplaceNewline(s string) string {
+	return nlRegexp.ReplaceAllString(s, "<br>")
+}

vendor/github.com/docker/cli-docs-tool/clidocstool_yaml.go

@@ -0,0 +1,378 @@
+// Copyright 2017 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clidocstool
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/docker/cli-docs-tool/annotation"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"gopkg.in/yaml.v3"
+)
+
+type cmdOption struct {
+	Option          string
+	Shorthand       string `yaml:",omitempty"`
+	ValueType       string `yaml:"value_type,omitempty"`
+	DefaultValue    string `yaml:"default_value,omitempty"`
+	Description     string `yaml:",omitempty"`
+	DetailsURL      string `yaml:"details_url,omitempty"` // DetailsURL contains an anchor-id or link for more information on this flag
+	Deprecated      bool
+	Hidden          bool
+	MinAPIVersion   string `yaml:"min_api_version,omitempty"`
+	Experimental    bool
+	ExperimentalCLI bool
+	Kubernetes      bool
+	Swarm           bool
+	OSType          string `yaml:"os_type,omitempty"`
+}
+
+type cmdDoc struct {
+	Name             string      `yaml:"command"`
+	SeeAlso          []string    `yaml:"parent,omitempty"`
+	Version          string      `yaml:"engine_version,omitempty"`
+	Aliases          string      `yaml:",omitempty"`
+	Short            string      `yaml:",omitempty"`
+	Long             string      `yaml:",omitempty"`
+	Usage            string      `yaml:",omitempty"`
+	Pname            string      `yaml:",omitempty"`
+	Plink            string      `yaml:",omitempty"`
+	Cname            []string    `yaml:",omitempty"`
+	Clink            []string    `yaml:",omitempty"`
+	Options          []cmdOption `yaml:",omitempty"`
+	InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
+	Example          string      `yaml:"examples,omitempty"`
+	Deprecated       bool
+	Hidden           bool
+	MinAPIVersion    string `yaml:"min_api_version,omitempty"`
+	Experimental     bool
+	ExperimentalCLI  bool
+	Kubernetes       bool
+	Swarm            bool
+	OSType           string `yaml:"os_type,omitempty"`
+}
+
+// GenYamlTree creates yaml structured ref files for this command and all descendants
+// in the directory given. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func (c *Client) GenYamlTree(cmd *cobra.Command) error {
+	emptyStr := func(string) string { return "" }
+	if err := c.loadLongDescription(cmd, "yaml"); err != nil {
+		return err
+	}
+	return c.genYamlTreeCustom(cmd, emptyStr)
+}
+
+// genYamlTreeCustom creates yaml structured ref files.
+func (c *Client) genYamlTreeCustom(cmd *cobra.Command, filePrepender func(string) string) error {
+	for _, sc := range cmd.Commands() {
+		if !sc.Runnable() && !sc.HasAvailableSubCommands() {
+			// skip non-runnable commands without subcommands
+			// but *do* generate YAML for hidden and deprecated commands
+			// the YAML will have those included as metadata, so that the
+			// documentation repository can decide whether or not to present them
+			continue
+		}
+		if err := c.genYamlTreeCustom(sc, filePrepender); err != nil {
+			return err
+		}
+	}
+
+	// always disable the addition of [flags] to the usage
+	cmd.DisableFlagsInUseLine = true
+
+	// The "root" command used in the generator is just a "stub", and only has a
+	// list of subcommands, but not (e.g.) global options/flags. We should fix
+	// that, so that the YAML file for the docker "root" command contains the
+	// global flags.
+
+	// Skip the root command altogether, to prevent generating a useless
+	// YAML file for plugins.
+	if c.plugin && !cmd.HasParent() {
+		return nil
+	}
+
+	log.Printf("INFO: Generating YAML for %q", cmd.CommandPath())
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".yaml"
+	target := filepath.Join(c.target, basename)
+	f, err := os.Create(target)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(target)); err != nil {
+		return err
+	}
+	return c.genYamlCustom(cmd, f)
+}
+
+// genYamlCustom creates custom yaml output.
+// nolint: gocyclo
+func (c *Client) genYamlCustom(cmd *cobra.Command, w io.Writer) error {
+	const (
+		// shortMaxWidth is the maximum width for the "Short" description before
+		// we force YAML to use multi-line syntax. The goal is to make the total
+		// width fit within 80 characters. This value is based on 80 characters
+		// minus the with of the field, colon, and whitespace ('short: ').
+		shortMaxWidth = 73
+
+		// longMaxWidth is the maximum width for the "Short" description before
+		// we force YAML to use multi-line syntax. The goal is to make the total
+		// width fit within 80 characters. This value is based on 80 characters
+		// minus the with of the field, colon, and whitespace ('long: ').
+		longMaxWidth = 74
+	)
+
+	// necessary to add inherited flags otherwise some
+	// fields are not properly declared like usage
+	cmd.Flags().AddFlagSet(cmd.InheritedFlags())
+
+	cliDoc := cmdDoc{
+		Name:       cmd.CommandPath(),
+		Aliases:    strings.Join(getAliases(cmd), ", "),
+		Short:      forceMultiLine(cmd.Short, shortMaxWidth),
+		Long:       forceMultiLine(cmd.Long, longMaxWidth),
+		Example:    cmd.Example,
+		Deprecated: len(cmd.Deprecated) > 0,
+		Hidden:     cmd.Hidden,
+	}
+
+	if len(cliDoc.Long) == 0 {
+		cliDoc.Long = cliDoc.Short
+	}
+
+	if cmd.Runnable() {
+		cliDoc.Usage = cmd.UseLine()
+	}
+
+	// check recursively to handle inherited annotations
+	for curr := cmd; curr != nil; curr = curr.Parent() {
+		if v, ok := curr.Annotations["version"]; ok && cliDoc.MinAPIVersion == "" {
+			cliDoc.MinAPIVersion = v
+		}
+		if _, ok := curr.Annotations["experimental"]; ok && !cliDoc.Experimental {
+			cliDoc.Experimental = true
+		}
+		if _, ok := curr.Annotations["experimentalCLI"]; ok && !cliDoc.ExperimentalCLI {
+			cliDoc.ExperimentalCLI = true
+		}
+		if _, ok := curr.Annotations["kubernetes"]; ok && !cliDoc.Kubernetes {
+			cliDoc.Kubernetes = true
+		}
+		if _, ok := curr.Annotations["swarm"]; ok && !cliDoc.Swarm {
+			cliDoc.Swarm = true
+		}
+		if o, ok := curr.Annotations["ostype"]; ok && cliDoc.OSType == "" {
+			cliDoc.OSType = o
+		}
+		if _, ok := cmd.Annotations[annotation.CodeDelimiter]; !ok {
+			if cd, cok := curr.Annotations[annotation.CodeDelimiter]; cok {
+				if cmd.Annotations == nil {
+					cmd.Annotations = map[string]string{}
+				}
+				cmd.Annotations[annotation.CodeDelimiter] = cd
+			}
+		}
+	}
+
+	anchors := make(map[string]struct{})
+	if a, ok := cmd.Annotations["anchors"]; ok && a != "" {
+		for _, anchor := range strings.Split(a, ",") {
+			anchors[anchor] = struct{}{}
+		}
+	}
+
+	flags := cmd.NonInheritedFlags()
+	if flags.HasFlags() {
+		cliDoc.Options = genFlagResult(cmd, flags, anchors)
+	}
+	flags = cmd.InheritedFlags()
+	if flags.HasFlags() {
+		cliDoc.InheritedOptions = genFlagResult(cmd, flags, anchors)
+	}
+
+	if hasSeeAlso(cmd) {
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			cliDoc.Pname = parent.CommandPath()
+			cliDoc.Plink = strings.Replace(cliDoc.Pname, " ", "_", -1) + ".yaml"
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			cliDoc.Cname = append(cliDoc.Cname, cliDoc.Name+" "+child.Name())
+			cliDoc.Clink = append(cliDoc.Clink, strings.Replace(cliDoc.Name+"_"+child.Name(), " ", "_", -1)+".yaml")
+		}
+	}
+
+	final, err := yaml.Marshal(&cliDoc)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	if _, err := fmt.Fprintln(w, string(final)); err != nil {
+		return err
+	}
+	return nil
+}
+
+func genFlagResult(cmd *cobra.Command, flags *pflag.FlagSet, anchors map[string]struct{}) []cmdOption {
+	var (
+		result []cmdOption
+		opt    cmdOption
+	)
+
+	const (
+		// shortMaxWidth is the maximum width for the "Short" description before
+		// we force YAML to use multi-line syntax. The goal is to make the total
+		// width fit within 80 characters. This value is based on 80 characters
+		// minus the with of the field, colon, and whitespace ('  default_value: ').
+		defaultValueMaxWidth = 64
+
+		// longMaxWidth is the maximum width for the "Short" description before
+		// we force YAML to use multi-line syntax. The goal is to make the total
+		// width fit within 80 characters. This value is based on 80 characters
+		// minus the with of the field, colon, and whitespace ('  description: ').
+		descriptionMaxWidth = 66
+	)
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		opt = cmdOption{
+			Option:     flag.Name,
+			ValueType:  flag.Value.Type(),
+			Deprecated: len(flag.Deprecated) > 0,
+			Hidden:     flag.Hidden,
+		}
+
+		var defval string
+		if v, ok := flag.Annotations[annotation.DefaultValue]; ok && len(v) > 0 {
+			defval = v[0]
+			if cd, ok := flag.Annotations[annotation.CodeDelimiter]; ok {
+				defval = strings.ReplaceAll(defval, cd[0], "`")
+			} else if cd, ok := cmd.Annotations[annotation.CodeDelimiter]; ok {
+				defval = strings.ReplaceAll(defval, cd, "`")
+			}
+		} else {
+			defval = flag.DefValue
+		}
+		opt.DefaultValue = forceMultiLine(defval, defaultValueMaxWidth)
+
+		usage := flag.Usage
+		if cd, ok := flag.Annotations[annotation.CodeDelimiter]; ok {
+			usage = strings.ReplaceAll(usage, cd[0], "`")
+		} else if cd, ok := cmd.Annotations[annotation.CodeDelimiter]; ok {
+			usage = strings.ReplaceAll(usage, cd, "`")
+		}
+		opt.Description = forceMultiLine(usage, descriptionMaxWidth)
+
+		if v, ok := flag.Annotations[annotation.ExternalURL]; ok && len(v) > 0 {
+			opt.DetailsURL = strings.TrimPrefix(v[0], "https://docs.docker.com")
+		} else if _, ok = anchors[flag.Name]; ok {
+			opt.DetailsURL = "#" + flag.Name
+		}
+
+		// Todo, when we mark a shorthand is deprecated, but specify an empty message.
+		// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
+		// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
+		if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
+			opt.Shorthand = flag.Shorthand
+		}
+		if _, ok := flag.Annotations["experimental"]; ok {
+			opt.Experimental = true
+		}
+		if _, ok := flag.Annotations["deprecated"]; ok {
+			opt.Deprecated = true
+		}
+		if v, ok := flag.Annotations["version"]; ok {
+			opt.MinAPIVersion = v[0]
+		}
+		if _, ok := flag.Annotations["experimentalCLI"]; ok {
+			opt.ExperimentalCLI = true
+		}
+		if _, ok := flag.Annotations["kubernetes"]; ok {
+			opt.Kubernetes = true
+		}
+		if _, ok := flag.Annotations["swarm"]; ok {
+			opt.Swarm = true
+		}
+
+		// Note that the annotation can have multiple ostypes set, however, multiple
+		// values are currently not used (and unlikely will).
+		//
+		// To simplify usage of the os_type property in the YAML, and for consistency
+		// with the same property for commands, we're only using the first ostype that's set.
+		if ostypes, ok := flag.Annotations["ostype"]; ok && len(opt.OSType) == 0 && len(ostypes) > 0 {
+			opt.OSType = ostypes[0]
+		}
+
+		result = append(result, opt)
+	})
+
+	return result
+}
+
+// forceMultiLine appends a newline (\n) to strings that are longer than max
+// to force the yaml lib to use block notation (https://yaml.org/spec/1.2/spec.html#Block)
+// instead of a single-line string with newlines and tabs encoded("string\nline1\nline2").
+//
+// This makes the generated YAML more readable, and easier to review changes.
+// max can be used to customize the width to keep the whole line < 80 chars.
+func forceMultiLine(s string, max int) string {
+	s = strings.TrimSpace(s)
+	if len(s) > max && !strings.Contains(s, "\n") {
+		s = s + "\n"
+	}
+	return s
+}
+
+// Small duplication for cobra utils
+func hasSeeAlso(cmd *cobra.Command) bool {
+	if cmd.HasParent() {
+		return true
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+type byName []*cobra.Command
+
+func (s byName) Len() int           { return len(s) }
+func (s byName) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }

vendor/github.com/docker/cli-docs-tool/docker-bake.hcl

@@ -0,0 +1,63 @@
+// Copyright 2021 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+target "_common" {
+  args = {
+    BUILDKIT_CONTEXT_KEEP_GIT_DIR = 1
+  }
+}
+
+group "default" {
+  targets = ["test"]
+}
+
+group "validate" {
+  targets = ["lint", "vendor-validate", "license-validate"]
+}
+
+target "lint" {
+  inherits = ["_common"]
+  target = "lint"
+  output = ["type=cacheonly"]
+}
+
+target "vendor-validate" {
+  inherits = ["_common"]
+  target = "vendor-validate"
+  output = ["type=cacheonly"]
+}
+
+target "vendor-update" {
+  inherits = ["_common"]
+  target = "vendor-update"
+  output = ["."]
+}
+
+target "test" {
+  inherits = ["_common"]
+  target = "test-coverage"
+  output = ["."]
+}
+
+target "license-validate" {
+  inherits = ["_common"]
+  target = "license-validate"
+  output = ["type=cacheonly"]
+}
+
+target "license-update" {
+  inherits = ["_common"]
+  target = "license-update"
+  output = ["."]
+}

vendor/github.com/docker/cli-docs-tool/markdown.go

@@ -0,0 +1,100 @@
+// Copyright 2017 cli-docs-tool authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clidocstool
+
+import (
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+var (
+	// mdHeading matches MarkDown H1..h6 headings. Note that this regex may produce
+	// false positives for (e.g.) comments in code-blocks (# this is a comment),
+	// so should not be used as a generic regex for other purposes.
+	mdHeading = regexp.MustCompile(`^([#]{1,6})\s(.*)$`)
+	// htmlAnchor matches inline HTML anchors. This is intended to only match anchors
+	// for our use-case; DO NOT consider using this as a generic regex, or at least
+	// not before reading https://stackoverflow.com/a/1732454/1811501.
+	htmlAnchor = regexp.MustCompile(`<a\s+(?:name|id)="?([^"]+)"?\s*></a>\s*`)
+	// relativeLink matches parts of internal links between .md documents
+	// e.g. "](buildx_build.md)"
+	relativeLink = regexp.MustCompile(`\]\((\.\/)?[a-z-_]+\.md(#.*)?\)`)
+)
+
+// getSections returns all H2 sections by title (lowercase)
+func getSections(mdString string) map[string]string {
+	parsedContent := strings.Split("\n"+mdString, "\n## ")
+	sections := make(map[string]string, len(parsedContent))
+	for _, s := range parsedContent {
+		if strings.HasPrefix(s, "#") {
+			// not a H2 Section
+			continue
+		}
+		parts := strings.SplitN(s, "\n", 2)
+		if len(parts) == 2 {
+			sections[strings.ToLower(parts[0])] = parts[1]
+		}
+	}
+	return sections
+}
+
+// cleanupMarkDown cleans up the MarkDown passed in mdString for inclusion in
+// YAML. It removes trailing whitespace and substitutes tabs for four spaces
+// to prevent YAML switching to use "compact" form; ("line1  \nline\t2\n")
+// which, although equivalent, is hard to read.
+func cleanupMarkDown(mdString string) (md string, anchors []string) {
+	// remove leading/trailing whitespace, and replace tabs in the whole content
+	mdString = strings.TrimSpace(mdString)
+	mdString = strings.ReplaceAll(mdString, "\t", "    ")
+	mdString = strings.ReplaceAll(mdString, "https://docs.docker.com", "")
+
+	// Rewrite internal links, replacing relative paths with absolute path
+	// e.g. from [docker buildx build](buildx_build.md#build-arg)
+	// to [docker buildx build](/reference/cli/docker/buildx/build/#build-arg)
+	mdString = relativeLink.ReplaceAllStringFunc(mdString, func(link string) string {
+		link = strings.TrimLeft(link, "](./")
+		link = strings.ReplaceAll(link, "_", "/")
+		link = strings.ReplaceAll(link, ".md", "/")
+		return "](/reference/cli/docker/" + link
+	})
+
+	var id string
+	// replace trailing whitespace per line, and handle custom anchors
+	lines := strings.Split(mdString, "\n")
+	for i := 0; i < len(lines); i++ {
+		lines[i] = strings.TrimRightFunc(lines[i], unicode.IsSpace)
+		lines[i], id = convertHTMLAnchor(lines[i])
+		if id != "" {
+			anchors = append(anchors, id)
+		}
+	}
+	return strings.Join(lines, "\n"), anchors
+}
+
+// convertHTMLAnchor converts inline anchor-tags in headings (<a name=myanchor></a>)
+// to an extended-markdown property ({#myanchor}). Extended Markdown properties
+// are not supported in GitHub Flavored Markdown, but are supported by Jekyll,
+// and lead to cleaner HTML in our docs, and prevents duplicate anchors.
+// It returns the converted MarkDown heading and the custom ID (if present)
+func convertHTMLAnchor(mdLine string) (md string, customID string) {
+	if m := mdHeading.FindStringSubmatch(mdLine); len(m) > 0 {
+		if a := htmlAnchor.FindStringSubmatch(m[2]); len(a) > 0 {
+			customID = a[1]
+			mdLine = m[1] + " " + htmlAnchor.ReplaceAllString(m[2], "") + " {#" + customID + "}"
+		}
+	}
+	return mdLine, customID
+}

vendor/github.com/russross/blackfriday/v2/.gitignore

@@ -0,0 +1,8 @@
+*.out
+*.swp
+*.8
+*.6
+_obj
+_test*
+markdown
+tags

vendor/github.com/russross/blackfriday/v2/.travis.yml

@@ -0,0 +1,17 @@
+sudo: false
+language: go
+go:
+  - "1.10.x"
+  - "1.11.x"
+  - tip
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip
+install:
+  - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
+script:
+  - go get -t -v ./...
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - go tool vet .
+  - go test -v ./...

vendor/github.com/russross/blackfriday/v2/LICENSE.txt

@@ -0,0 +1,29 @@
+Blackfriday is distributed under the Simplified BSD License:
+
+> Copyright © 2011 Russ Ross
+> All rights reserved.
+>
+> Redistribution and use in source and binary forms, with or without
+> modification, are permitted provided that the following conditions
+> are met:
+>
+> 1.  Redistributions of source code must retain the above copyright
+>     notice, this list of conditions and the following disclaimer.
+>
+> 2.  Redistributions in binary form must reproduce the above
+>     copyright notice, this list of conditions and the following
+>     disclaimer in the documentation and/or other materials provided with
+>     the distribution.
+>
+> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+> FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+> COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+> INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+> BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+> LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+> ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+> POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/russross/blackfriday/v2/README.md

@@ -0,0 +1,335 @@
+Blackfriday
+[![Build Status][BuildV2SVG]][BuildV2URL]
+[![PkgGoDev][PkgGoDevV2SVG]][PkgGoDevV2URL]
+===========
+
+Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It
+is paranoid about its input (so you can safely feed it user-supplied
+data), it is fast, it supports common extensions (tables, smart
+punctuation substitutions, etc.), and it is safe for all utf-8
+(unicode) input.
+
+HTML output is currently supported, along with Smartypants
+extensions.
+
+It started as a translation from C of [Sundown][3].
+
+
+Installation
+------------
+
+Blackfriday is compatible with modern Go releases in module mode.
+With Go installed:
+
+    go get github.com/russross/blackfriday/v2
+
+will resolve and add the package to the current development module,
+then build and install it. Alternatively, you can achieve the same
+if you import it in a package:
+
+    import "github.com/russross/blackfriday/v2"
+
+and `go get` without parameters.
+
+Legacy GOPATH mode is unsupported.
+
+
+Versions
+--------
+
+Currently maintained and recommended version of Blackfriday is `v2`. It's being
+developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and the
+documentation is available at
+https://pkg.go.dev/github.com/russross/blackfriday/v2.
+
+It is `go get`-able in module mode at `github.com/russross/blackfriday/v2`.
+
+Version 2 offers a number of improvements over v1:
+
+* Cleaned up API
+* A separate call to [`Parse`][4], which produces an abstract syntax tree for
+  the document
+* Latest bug fixes
+* Flexibility to easily add your own rendering extensions
+
+Potential drawbacks:
+
+* Our benchmarks show v2 to be slightly slower than v1. Currently in the
+  ballpark of around 15%.
+* API breakage. If you can't afford modifying your code to adhere to the new API
+  and don't care too much about the new features, v2 is probably not for you.
+* Several bug fixes are trailing behind and still need to be forward-ported to
+  v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for
+  tracking.
+
+If you are still interested in the legacy `v1`, you can import it from
+`github.com/russross/blackfriday`. Documentation for the legacy v1 can be found
+here: https://pkg.go.dev/github.com/russross/blackfriday.
+
+
+Usage
+-----
+
+For the most sensible markdown processing, it is as simple as getting your input
+into a byte slice and calling:
+
+```go
+output := blackfriday.Run(input)
+```
+
+Your input will be parsed and the output rendered with a set of most popular
+extensions enabled. If you want the most basic feature set, corresponding with
+the bare Markdown specification, use:
+
+```go
+output := blackfriday.Run(input, blackfriday.WithNoExtensions())
+```
+
+### Sanitize untrusted content
+
+Blackfriday itself does nothing to protect against malicious content. If you are
+dealing with user-supplied markdown, we recommend running Blackfriday's output
+through HTML sanitizer such as [Bluemonday][5].
+
+Here's an example of simple usage of Blackfriday together with Bluemonday:
+
+```go
+import (
+    "github.com/microcosm-cc/bluemonday"
+    "github.com/russross/blackfriday/v2"
+)
+
+// ...
+unsafe := blackfriday.Run(input)
+html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
+```
+
+### Custom options
+
+If you want to customize the set of options, use `blackfriday.WithExtensions`,
+`blackfriday.WithRenderer` and `blackfriday.WithRefOverride`.
+
+### `blackfriday-tool`
+
+You can also check out `blackfriday-tool` for a more complete example
+of how to use it. Download and install it using:
+
+    go get github.com/russross/blackfriday-tool
+
+This is a simple command-line tool that allows you to process a
+markdown file using a standalone program.  You can also browse the
+source directly on github if you are just looking for some example
+code:
+
+* <https://github.com/russross/blackfriday-tool>
+
+Note that if you have not already done so, installing
+`blackfriday-tool` will be sufficient to download and install
+blackfriday in addition to the tool itself. The tool binary will be
+installed in `$GOPATH/bin`.  This is a statically-linked binary that
+can be copied to wherever you need it without worrying about
+dependencies and library versions.
+
+### Sanitized anchor names
+
+Blackfriday includes an algorithm for creating sanitized anchor names
+corresponding to a given input text. This algorithm is used to create
+anchors for headings when `AutoHeadingIDs` extension is enabled. The
+algorithm has a specification, so that other packages can create
+compatible anchor names and links to those anchors.
+
+The specification is located at https://pkg.go.dev/github.com/russross/blackfriday/v2#hdr-Sanitized_Anchor_Names.
+
+[`SanitizedAnchorName`](https://pkg.go.dev/github.com/russross/blackfriday/v2#SanitizedAnchorName) exposes this functionality, and can be used to
+create compatible links to the anchor names generated by blackfriday.
+This algorithm is also implemented in a small standalone package at
+[`github.com/shurcooL/sanitized_anchor_name`](https://pkg.go.dev/github.com/shurcooL/sanitized_anchor_name). It can be useful for clients
+that want a small package and don't need full functionality of blackfriday.
+
+
+Features
+--------
+
+All features of Sundown are supported, including:
+
+*   **Compatibility**. The Markdown v1.0.3 test suite passes with
+    the `--tidy` option.  Without `--tidy`, the differences are
+    mostly in whitespace and entity escaping, where blackfriday is
+    more consistent and cleaner.
+
+*   **Common extensions**, including table support, fenced code
+    blocks, autolinks, strikethroughs, non-strict emphasis, etc.
+
+*   **Safety**. Blackfriday is paranoid when parsing, making it safe
+    to feed untrusted user input without fear of bad things
+    happening. The test suite stress tests this and there are no
+    known inputs that make it crash.  If you find one, please let me
+    know and send me the input that does it.
+
+    NOTE: "safety" in this context means *runtime safety only*. In order to
+    protect yourself against JavaScript injection in untrusted content, see
+    [this example](https://github.com/russross/blackfriday#sanitize-untrusted-content).
+
+*   **Fast processing**. It is fast enough to render on-demand in
+    most web applications without having to cache the output.
+
+*   **Thread safety**. You can run multiple parsers in different
+    goroutines without ill effect. There is no dependence on global
+    shared state.
+
+*   **Minimal dependencies**. Blackfriday only depends on standard
+    library packages in Go. The source code is pretty
+    self-contained, so it is easy to add to any project, including
+    Google App Engine projects.
+
+*   **Standards compliant**. Output successfully validates using the
+    W3C validation tool for HTML 4.01 and XHTML 1.0 Transitional.
+
+
+Extensions
+----------
+
+In addition to the standard markdown syntax, this package
+implements the following extensions:
+
+*   **Intra-word emphasis supression**. The `_` character is
+    commonly used inside words when discussing code, so having
+    markdown interpret it as an emphasis command is usually the
+    wrong thing. Blackfriday lets you treat all emphasis markers as
+    normal characters when they occur inside a word.
+
+*   **Tables**. Tables can be created by drawing them in the input
+    using a simple syntax:
+
+    ```
+    Name    | Age
+    --------|------
+    Bob     | 27
+    Alice   | 23
+    ```
+
+*   **Fenced code blocks**. In addition to the normal 4-space
+    indentation to mark code blocks, you can explicitly mark them
+    and supply a language (to make syntax highlighting simple). Just
+    mark it like this:
+
+        ```go
+        func getTrue() bool {
+            return true
+        }
+        ```
+
+    You can use 3 or more backticks to mark the beginning of the
+    block, and the same number to mark the end of the block.
+
+    To preserve classes of fenced code blocks while using the bluemonday
+    HTML sanitizer, use the following policy:
+
+    ```go
+    p := bluemonday.UGCPolicy()
+    p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code")
+    html := p.SanitizeBytes(unsafe)
+    ```
+
+*   **Definition lists**. A simple definition list is made of a single-line
+    term followed by a colon and the definition for that term.
+
+        Cat
+        : Fluffy animal everyone likes
+
+        Internet
+        : Vector of transmission for pictures of cats
+
+    Terms must be separated from the previous definition by a blank line.
+
+*   **Footnotes**. A marker in the text that will become a superscript number;
+    a footnote definition that will be placed in a list of footnotes at the
+    end of the document. A footnote looks like this:
+
+        This is a footnote.[^1]
+
+        [^1]: the footnote text.
+
+*   **Autolinking**. Blackfriday can find URLs that have not been
+    explicitly marked as links and turn them into links.
+
+*   **Strikethrough**. Use two tildes (`~~`) to mark text that
+    should be crossed out.
+
+*   **Hard line breaks**. With this extension enabled newlines in the input
+    translate into line breaks in the output. This extension is off by default.
+
+*   **Smart quotes**. Smartypants-style punctuation substitution is
+    supported, turning normal double- and single-quote marks into
+    curly quotes, etc.
+
+*   **LaTeX-style dash parsing** is an additional option, where `--`
+    is translated into `&ndash;`, and `---` is translated into
+    `&mdash;`. This differs from most smartypants processors, which
+    turn a single hyphen into an ndash and a double hyphen into an
+    mdash.
+
+*   **Smart fractions**, where anything that looks like a fraction
+    is translated into suitable HTML (instead of just a few special
+    cases like most smartypant processors). For example, `4/5`
+    becomes `<sup>4</sup>&frasl;<sub>5</sub>`, which renders as
+    <sup>4</sup>&frasl;<sub>5</sub>.
+
+
+Other renderers
+---------------
+
+Blackfriday is structured to allow alternative rendering engines. Here
+are a few of note:
+
+*   [github_flavored_markdown](https://pkg.go.dev/github.com/shurcooL/github_flavored_markdown):
+    provides a GitHub Flavored Markdown renderer with fenced code block
+    highlighting, clickable heading anchor links.
+
+    It's not customizable, and its goal is to produce HTML output
+    equivalent to the [GitHub Markdown API endpoint](https://developer.github.com/v3/markdown/#render-a-markdown-document-in-raw-mode),
+    except the rendering is performed locally.
+
+*   [markdownfmt](https://github.com/shurcooL/markdownfmt): like gofmt,
+    but for markdown.
+
+*   [LaTeX output](https://gitlab.com/ambrevar/blackfriday-latex):
+    renders output as LaTeX.
+
+*   [bfchroma](https://github.com/Depado/bfchroma/): provides convenience
+    integration with the [Chroma](https://github.com/alecthomas/chroma) code
+    highlighting library. bfchroma is only compatible with v2 of Blackfriday and
+    provides a drop-in renderer ready to use with Blackfriday, as well as
+    options and means for further customization.
+
+*   [Blackfriday-Confluence](https://github.com/kentaro-m/blackfriday-confluence): provides a [Confluence Wiki Markup](https://confluence.atlassian.com/doc/confluence-wiki-markup-251003035.html) renderer.
+
+*   [Blackfriday-Slack](https://github.com/karriereat/blackfriday-slack): converts markdown to slack message style
+
+
+TODO
+----
+
+*   More unit testing
+*   Improve Unicode support. It does not understand all Unicode
+    rules (about what constitutes a letter, a punctuation symbol,
+    etc.), so it may fail to detect word boundaries correctly in
+    some instances. It is safe on all UTF-8 input.
+
+
+License
+-------
+
+[Blackfriday is distributed under the Simplified BSD License](LICENSE.txt)
+
+
+   [1]: https://daringfireball.net/projects/markdown/ "Markdown"
+   [2]: https://golang.org/ "Go Language"
+   [3]: https://github.com/vmg/sundown "Sundown"
+   [4]: https://pkg.go.dev/github.com/russross/blackfriday/v2#Parse "Parse func"
+   [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
+
+   [BuildV2SVG]: https://travis-ci.org/russross/blackfriday.svg?branch=v2
+   [BuildV2URL]: https://travis-ci.org/russross/blackfriday
+   [PkgGoDevV2SVG]: https://pkg.go.dev/badge/github.com/russross/blackfriday/v2
+   [PkgGoDevV2URL]: https://pkg.go.dev/github.com/russross/blackfriday/v2

vendor/github.com/russross/blackfriday/v2/doc.go

@@ -0,0 +1,46 @@
+// Package blackfriday is a markdown processor.
+//
+// It translates plain text with simple formatting rules into an AST, which can
+// then be further processed to HTML (provided by Blackfriday itself) or other
+// formats (provided by the community).
+//
+// The simplest way to invoke Blackfriday is to call the Run function. It will
+// take a text input and produce a text output in HTML (or other format).
+//
+// A slightly more sophisticated way to use Blackfriday is to create a Markdown
+// processor and to call Parse, which returns a syntax tree for the input
+// document. You can leverage Blackfriday's parsing for content extraction from
+// markdown documents. You can assign a custom renderer and set various options
+// to the Markdown processor.
+//
+// If you're interested in calling Blackfriday from command line, see
+// https://github.com/russross/blackfriday-tool.
+//
+// Sanitized Anchor Names
+//
+// Blackfriday includes an algorithm for creating sanitized anchor names
+// corresponding to a given input text. This algorithm is used to create
+// anchors for headings when AutoHeadingIDs extension is enabled. The
+// algorithm is specified below, so that other packages can create
+// compatible anchor names and links to those anchors.
+//
+// The algorithm iterates over the input text, interpreted as UTF-8,
+// one Unicode code point (rune) at a time. All runes that are letters (category L)
+// or numbers (category N) are considered valid characters. They are mapped to
+// lower case, and included in the output. All other runes are considered
+// invalid characters. Invalid characters that precede the first valid character,
+// as well as invalid character that follow the last valid character
+// are dropped completely. All other sequences of invalid characters
+// between two valid characters are replaced with a single dash character '-'.
+//
+// SanitizedAnchorName exposes this functionality, and can be used to
+// create compatible links to the anchor names generated by blackfriday.
+// This algorithm is also implemented in a small standalone package at
+// github.com/shurcooL/sanitized_anchor_name. It can be useful for clients
+// that want a small package and don't need full functionality of blackfriday.
+package blackfriday
+
+// NOTE: Keep Sanitized Anchor Name algorithm in sync with package
+//       github.com/shurcooL/sanitized_anchor_name.
+//       Otherwise, users of sanitized_anchor_name will get anchor names
+//       that are incompatible with those generated by blackfriday.

vendor/github.com/russross/blackfriday/v2/esc.go

@@ -0,0 +1,70 @@
+package blackfriday
+
+import (
+	"html"
+	"io"
+)
+
+var htmlEscaper = [256][]byte{
+	'&': []byte("&"),
+	'<': []byte("&lt;"),
+	'>': []byte("&gt;"),
+	'"': []byte("&quot;"),
+}
+
+func escapeHTML(w io.Writer, s []byte) {
+	escapeEntities(w, s, false)
+}
+
+func escapeAllHTML(w io.Writer, s []byte) {
+	escapeEntities(w, s, true)
+}
+
+func escapeEntities(w io.Writer, s []byte, escapeValidEntities bool) {
+	var start, end int
+	for end < len(s) {
+		escSeq := htmlEscaper[s[end]]
+		if escSeq != nil {
+			isEntity, entityEnd := nodeIsEntity(s, end)
+			if isEntity && !escapeValidEntities {
+				w.Write(s[start : entityEnd+1])
+				start = entityEnd + 1
+			} else {
+				w.Write(s[start:end])
+				w.Write(escSeq)
+				start = end + 1
+			}
+		}
+		end++
+	}
+	if start < len(s) && end <= len(s) {
+		w.Write(s[start:end])
+	}
+}
+
+func nodeIsEntity(s []byte, end int) (isEntity bool, endEntityPos int) {
+	isEntity = false
+	endEntityPos = end + 1
+
+	if s[end] == '&' {
+		for endEntityPos < len(s) {
+			if s[endEntityPos] == ';' {
+				if entities[string(s[end:endEntityPos+1])] {
+					isEntity = true
+					break
+				}
+			}
+			if !isalnum(s[endEntityPos]) && s[endEntityPos] != '&' && s[endEntityPos] != '#' {
+				break
+			}
+			endEntityPos++
+		}
+	}
+
+	return isEntity, endEntityPos
+}
+
+func escLink(w io.Writer, text []byte) {
+	unesc := html.UnescapeString(string(text))
+	escapeHTML(w, []byte(unesc))
+}

vendor/github.com/russross/blackfriday/v2/html.go

@@ -0,0 +1,952 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// HTML rendering backend
+//
+//
+
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"regexp"
+	"strings"
+)
+
+// HTMLFlags control optional behavior of HTML renderer.
+type HTMLFlags int
+
+// HTML renderer configuration options.
+const (
+	HTMLFlagsNone           HTMLFlags = 0
+	SkipHTML                HTMLFlags = 1 << iota // Skip preformatted HTML blocks
+	SkipImages                                    // Skip embedded images
+	SkipLinks                                     // Skip all links
+	Safelink                                      // Only link to trusted protocols
+	NofollowLinks                                 // Only link with rel="nofollow"
+	NoreferrerLinks                               // Only link with rel="noreferrer"
+	NoopenerLinks                                 // Only link with rel="noopener"
+	HrefTargetBlank                               // Add a blank target
+	CompletePage                                  // Generate a complete HTML page
+	UseXHTML                                      // Generate XHTML output instead of HTML
+	FootnoteReturnLinks                           // Generate a link at the end of a footnote to return to the source
+	Smartypants                                   // Enable smart punctuation substitutions
+	SmartypantsFractions                          // Enable smart fractions (with Smartypants)
+	SmartypantsDashes                             // Enable smart dashes (with Smartypants)
+	SmartypantsLatexDashes                        // Enable LaTeX-style dashes (with Smartypants)
+	SmartypantsAngledQuotes                       // Enable angled double quotes (with Smartypants) for double quotes rendering
+	SmartypantsQuotesNBSP                         // Enable « French guillemets » (with Smartypants)
+	TOC                                           // Generate a table of contents
+)
+
+var (
+	htmlTagRe = regexp.MustCompile("(?i)^" + htmlTag)
+)
+
+const (
+	htmlTag = "(?:" + openTag + "|" + closeTag + "|" + htmlComment + "|" +
+		processingInstruction + "|" + declaration + "|" + cdata + ")"
+	closeTag              = "</" + tagName + "\\s*[>]"
+	openTag               = "<" + tagName + attribute + "*" + "\\s*/?>"
+	attribute             = "(?:" + "\\s+" + attributeName + attributeValueSpec + "?)"
+	attributeValue        = "(?:" + unquotedValue + "|" + singleQuotedValue + "|" + doubleQuotedValue + ")"
+	attributeValueSpec    = "(?:" + "\\s*=" + "\\s*" + attributeValue + ")"
+	attributeName         = "[a-zA-Z_:][a-zA-Z0-9:._-]*"
+	cdata                 = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
+	declaration           = "<![A-Z]+" + "\\s+[^>]*>"
+	doubleQuotedValue     = "\"[^\"]*\""
+	htmlComment           = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
+	processingInstruction = "[<][?].*?[?][>]"
+	singleQuotedValue     = "'[^']*'"
+	tagName               = "[A-Za-z][A-Za-z0-9-]*"
+	unquotedValue         = "[^\"'=<>`\\x00-\\x20]+"
+)
+
+// HTMLRendererParameters is a collection of supplementary parameters tweaking
+// the behavior of various parts of HTML renderer.
+type HTMLRendererParameters struct {
+	// Prepend this text to each relative URL.
+	AbsolutePrefix string
+	// Add this text to each footnote anchor, to ensure uniqueness.
+	FootnoteAnchorPrefix string
+	// Show this text inside the <a> tag for a footnote return link, if the
+	// HTML_FOOTNOTE_RETURN_LINKS flag is enabled. If blank, the string
+	// <sup>[return]</sup> is used.
+	FootnoteReturnLinkContents string
+	// If set, add this text to the front of each Heading ID, to ensure
+	// uniqueness.
+	HeadingIDPrefix string
+	// If set, add this text to the back of each Heading ID, to ensure uniqueness.
+	HeadingIDSuffix string
+	// Increase heading levels: if the offset is 1, <h1> becomes <h2> etc.
+	// Negative offset is also valid.
+	// Resulting levels are clipped between 1 and 6.
+	HeadingLevelOffset int
+
+	Title string // Document title (used if CompletePage is set)
+	CSS   string // Optional CSS file URL (used if CompletePage is set)
+	Icon  string // Optional icon file URL (used if CompletePage is set)
+
+	Flags HTMLFlags // Flags allow customizing this renderer's behavior
+}
+
+// HTMLRenderer is a type that implements the Renderer interface for HTML output.
+//
+// Do not create this directly, instead use the NewHTMLRenderer function.
+type HTMLRenderer struct {
+	HTMLRendererParameters
+
+	closeTag string // how to end singleton tags: either " />" or ">"
+
+	// Track heading IDs to prevent ID collision in a single generation.
+	headingIDs map[string]int
+
+	lastOutputLen int
+	disableTags   int
+
+	sr *SPRenderer
+}
+
+const (
+	xhtmlClose = " />"
+	htmlClose  = ">"
+)
+
+// NewHTMLRenderer creates and configures an HTMLRenderer object, which
+// satisfies the Renderer interface.
+func NewHTMLRenderer(params HTMLRendererParameters) *HTMLRenderer {
+	// configure the rendering engine
+	closeTag := htmlClose
+	if params.Flags&UseXHTML != 0 {
+		closeTag = xhtmlClose
+	}
+
+	if params.FootnoteReturnLinkContents == "" {
+		// U+FE0E is VARIATION SELECTOR-15.
+		// It suppresses automatic emoji presentation of the preceding
+		// U+21A9 LEFTWARDS ARROW WITH HOOK on iOS and iPadOS.
+		params.FootnoteReturnLinkContents = "<span aria-label='Return'>↩\ufe0e</span>"
+	}
+
+	return &HTMLRenderer{
+		HTMLRendererParameters: params,
+
+		closeTag:   closeTag,
+		headingIDs: make(map[string]int),
+
+		sr: NewSmartypantsRenderer(params.Flags),
+	}
+}
+
+func isHTMLTag(tag []byte, tagname string) bool {
+	found, _ := findHTMLTagPos(tag, tagname)
+	return found
+}
+
+// Look for a character, but ignore it when it's in any kind of quotes, it
+// might be JavaScript
+func skipUntilCharIgnoreQuotes(html []byte, start int, char byte) int {
+	inSingleQuote := false
+	inDoubleQuote := false
+	inGraveQuote := false
+	i := start
+	for i < len(html) {
+		switch {
+		case html[i] == char && !inSingleQuote && !inDoubleQuote && !inGraveQuote:
+			return i
+		case html[i] == '\'':
+			inSingleQuote = !inSingleQuote
+		case html[i] == '"':
+			inDoubleQuote = !inDoubleQuote
+		case html[i] == '`':
+			inGraveQuote = !inGraveQuote
+		}
+		i++
+	}
+	return start
+}
+
+func findHTMLTagPos(tag []byte, tagname string) (bool, int) {
+	i := 0
+	if i < len(tag) && tag[0] != '<' {
+		return false, -1
+	}
+	i++
+	i = skipSpace(tag, i)
+
+	if i < len(tag) && tag[i] == '/' {
+		i++
+	}
+
+	i = skipSpace(tag, i)
+	j := 0
+	for ; i < len(tag); i, j = i+1, j+1 {
+		if j >= len(tagname) {
+			break
+		}
+
+		if strings.ToLower(string(tag[i]))[0] != tagname[j] {
+			return false, -1
+		}
+	}
+
+	if i == len(tag) {
+		return false, -1
+	}
+
+	rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
+	if rightAngle >= i {
+		return true, rightAngle
+	}
+
+	return false, -1
+}
+
+func skipSpace(tag []byte, i int) int {
+	for i < len(tag) && isspace(tag[i]) {
+		i++
+	}
+	return i
+}
+
+func isRelativeLink(link []byte) (yes bool) {
+	// a tag begin with '#'
+	if link[0] == '#' {
+		return true
+	}
+
+	// link begin with '/' but not '//', the second maybe a protocol relative link
+	if len(link) >= 2 && link[0] == '/' && link[1] != '/' {
+		return true
+	}
+
+	// only the root '/'
+	if len(link) == 1 && link[0] == '/' {
+		return true
+	}
+
+	// current directory : begin with "./"
+	if bytes.HasPrefix(link, []byte("./")) {
+		return true
+	}
+
+	// parent directory : begin with "../"
+	if bytes.HasPrefix(link, []byte("../")) {
+		return true
+	}
+
+	return false
+}
+
+func (r *HTMLRenderer) ensureUniqueHeadingID(id string) string {
+	for count, found := r.headingIDs[id]; found; count, found = r.headingIDs[id] {
+		tmp := fmt.Sprintf("%s-%d", id, count+1)
+
+		if _, tmpFound := r.headingIDs[tmp]; !tmpFound {
+			r.headingIDs[id] = count + 1
+			id = tmp
+		} else {
+			id = id + "-1"
+		}
+	}
+
+	if _, found := r.headingIDs[id]; !found {
+		r.headingIDs[id] = 0
+	}
+
+	return id
+}
+
+func (r *HTMLRenderer) addAbsPrefix(link []byte) []byte {
+	if r.AbsolutePrefix != "" && isRelativeLink(link) && link[0] != '.' {
+		newDest := r.AbsolutePrefix
+		if link[0] != '/' {
+			newDest += "/"
+		}
+		newDest += string(link)
+		return []byte(newDest)
+	}
+	return link
+}
+
+func appendLinkAttrs(attrs []string, flags HTMLFlags, link []byte) []string {
+	if isRelativeLink(link) {
+		return attrs
+	}
+	val := []string{}
+	if flags&NofollowLinks != 0 {
+		val = append(val, "nofollow")
+	}
+	if flags&NoreferrerLinks != 0 {
+		val = append(val, "noreferrer")
+	}
+	if flags&NoopenerLinks != 0 {
+		val = append(val, "noopener")
+	}
+	if flags&HrefTargetBlank != 0 {
+		attrs = append(attrs, "target=\"_blank\"")
+	}
+	if len(val) == 0 {
+		return attrs
+	}
+	attr := fmt.Sprintf("rel=%q", strings.Join(val, " "))
+	return append(attrs, attr)
+}
+
+func isMailto(link []byte) bool {
+	return bytes.HasPrefix(link, []byte("mailto:"))
+}
+
+func needSkipLink(flags HTMLFlags, dest []byte) bool {
+	if flags&SkipLinks != 0 {
+		return true
+	}
+	return flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest)
+}
+
+func isSmartypantable(node *Node) bool {
+	pt := node.Parent.Type
+	return pt != Link && pt != CodeBlock && pt != Code
+}
+
+func appendLanguageAttr(attrs []string, info []byte) []string {
+	if len(info) == 0 {
+		return attrs
+	}
+	endOfLang := bytes.IndexAny(info, "\t ")
+	if endOfLang < 0 {
+		endOfLang = len(info)
+	}
+	return append(attrs, fmt.Sprintf("class=\"language-%s\"", info[:endOfLang]))
+}
+
+func (r *HTMLRenderer) tag(w io.Writer, name []byte, attrs []string) {
+	w.Write(name)
+	if len(attrs) > 0 {
+		w.Write(spaceBytes)
+		w.Write([]byte(strings.Join(attrs, " ")))
+	}
+	w.Write(gtBytes)
+	r.lastOutputLen = 1
+}
+
+func footnoteRef(prefix string, node *Node) []byte {
+	urlFrag := prefix + string(slugify(node.Destination))
+	anchor := fmt.Sprintf(`<a href="#fn:%s">%d</a>`, urlFrag, node.NoteID)
+	return []byte(fmt.Sprintf(`<sup class="footnote-ref" id="fnref:%s">%s</sup>`, urlFrag, anchor))
+}
+
+func footnoteItem(prefix string, slug []byte) []byte {
+	return []byte(fmt.Sprintf(`<li id="fn:%s%s">`, prefix, slug))
+}
+
+func footnoteReturnLink(prefix, returnLink string, slug []byte) []byte {
+	const format = ` <a class="footnote-return" href="#fnref:%s%s">%s</a>`
+	return []byte(fmt.Sprintf(format, prefix, slug, returnLink))
+}
+
+func itemOpenCR(node *Node) bool {
+	if node.Prev == nil {
+		return false
+	}
+	ld := node.Parent.ListData
+	return !ld.Tight && ld.ListFlags&ListTypeDefinition == 0
+}
+
+func skipParagraphTags(node *Node) bool {
+	grandparent := node.Parent.Parent
+	if grandparent == nil || grandparent.Type != List {
+		return false
+	}
+	tightOrTerm := grandparent.Tight || node.Parent.ListFlags&ListTypeTerm != 0
+	return grandparent.Type == List && tightOrTerm
+}
+
+func cellAlignment(align CellAlignFlags) string {
+	switch align {
+	case TableAlignmentLeft:
+		return "left"
+	case TableAlignmentRight:
+		return "right"
+	case TableAlignmentCenter:
+		return "center"
+	default:
+		return ""
+	}
+}
+
+func (r *HTMLRenderer) out(w io.Writer, text []byte) {
+	if r.disableTags > 0 {
+		w.Write(htmlTagRe.ReplaceAll(text, []byte{}))
+	} else {
+		w.Write(text)
+	}
+	r.lastOutputLen = len(text)
+}
+
+func (r *HTMLRenderer) cr(w io.Writer) {
+	if r.lastOutputLen > 0 {
+		r.out(w, nlBytes)
+	}
+}
+
+var (
+	nlBytes    = []byte{'\n'}
+	gtBytes    = []byte{'>'}
+	spaceBytes = []byte{' '}
+)
+
+var (
+	brTag              = []byte("<br>")
+	brXHTMLTag         = []byte("<br />")
+	emTag              = []byte("<em>")
+	emCloseTag         = []byte("</em>")
+	strongTag          = []byte("<strong>")
+	strongCloseTag     = []byte("</strong>")
+	delTag             = []byte("<del>")
+	delCloseTag        = []byte("</del>")
+	ttTag              = []byte("<tt>")
+	ttCloseTag         = []byte("</tt>")
+	aTag               = []byte("<a")
+	aCloseTag          = []byte("</a>")
+	preTag             = []byte("<pre>")
+	preCloseTag        = []byte("</pre>")
+	codeTag            = []byte("<code>")
+	codeCloseTag       = []byte("</code>")
+	pTag               = []byte("<p>")
+	pCloseTag          = []byte("</p>")
+	blockquoteTag      = []byte("<blockquote>")
+	blockquoteCloseTag = []byte("</blockquote>")
+	hrTag              = []byte("<hr>")
+	hrXHTMLTag         = []byte("<hr />")
+	ulTag              = []byte("<ul>")
+	ulCloseTag         = []byte("</ul>")
+	olTag              = []byte("<ol>")
+	olCloseTag         = []byte("</ol>")
+	dlTag              = []byte("<dl>")
+	dlCloseTag         = []byte("</dl>")
+	liTag              = []byte("<li>")
+	liCloseTag         = []byte("</li>")
+	ddTag              = []byte("<dd>")
+	ddCloseTag         = []byte("</dd>")
+	dtTag              = []byte("<dt>")
+	dtCloseTag         = []byte("</dt>")
+	tableTag           = []byte("<table>")
+	tableCloseTag      = []byte("</table>")
+	tdTag              = []byte("<td")
+	tdCloseTag         = []byte("</td>")
+	thTag              = []byte("<th")
+	thCloseTag         = []byte("</th>")
+	theadTag           = []byte("<thead>")
+	theadCloseTag      = []byte("</thead>")
+	tbodyTag           = []byte("<tbody>")
+	tbodyCloseTag      = []byte("</tbody>")
+	trTag              = []byte("<tr>")
+	trCloseTag         = []byte("</tr>")
+	h1Tag              = []byte("<h1")
+	h1CloseTag         = []byte("</h1>")
+	h2Tag              = []byte("<h2")
+	h2CloseTag         = []byte("</h2>")
+	h3Tag              = []byte("<h3")
+	h3CloseTag         = []byte("</h3>")
+	h4Tag              = []byte("<h4")
+	h4CloseTag         = []byte("</h4>")
+	h5Tag              = []byte("<h5")
+	h5CloseTag         = []byte("</h5>")
+	h6Tag              = []byte("<h6")
+	h6CloseTag         = []byte("</h6>")
+
+	footnotesDivBytes      = []byte("\n<div class=\"footnotes\">\n\n")
+	footnotesCloseDivBytes = []byte("\n</div>\n")
+)
+
+func headingTagsFromLevel(level int) ([]byte, []byte) {
+	if level <= 1 {
+		return h1Tag, h1CloseTag
+	}
+	switch level {
+	case 2:
+		return h2Tag, h2CloseTag
+	case 3:
+		return h3Tag, h3CloseTag
+	case 4:
+		return h4Tag, h4CloseTag
+	case 5:
+		return h5Tag, h5CloseTag
+	}
+	return h6Tag, h6CloseTag
+}
+
+func (r *HTMLRenderer) outHRTag(w io.Writer) {
+	if r.Flags&UseXHTML == 0 {
+		r.out(w, hrTag)
+	} else {
+		r.out(w, hrXHTMLTag)
+	}
+}
+
+// RenderNode is a default renderer of a single node of a syntax tree. For
+// block nodes it will be called twice: first time with entering=true, second
+// time with entering=false, so that it could know when it's working on an open
+// tag and when on close. It writes the result to w.
+//
+// The return value is a way to tell the calling walker to adjust its walk
+// pattern: e.g. it can terminate the traversal by returning Terminate. Or it
+// can ask the walker to skip a subtree of this node by returning SkipChildren.
+// The typical behavior is to return GoToNext, which asks for the usual
+// traversal to the next node.
+func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
+	attrs := []string{}
+	switch node.Type {
+	case Text:
+		if r.Flags&Smartypants != 0 {
+			var tmp bytes.Buffer
+			escapeHTML(&tmp, node.Literal)
+			r.sr.Process(w, tmp.Bytes())
+		} else {
+			if node.Parent.Type == Link {
+				escLink(w, node.Literal)
+			} else {
+				escapeHTML(w, node.Literal)
+			}
+		}
+	case Softbreak:
+		r.cr(w)
+		// TODO: make it configurable via out(renderer.softbreak)
+	case Hardbreak:
+		if r.Flags&UseXHTML == 0 {
+			r.out(w, brTag)
+		} else {
+			r.out(w, brXHTMLTag)
+		}
+		r.cr(w)
+	case Emph:
+		if entering {
+			r.out(w, emTag)
+		} else {
+			r.out(w, emCloseTag)
+		}
+	case Strong:
+		if entering {
+			r.out(w, strongTag)
+		} else {
+			r.out(w, strongCloseTag)
+		}
+	case Del:
+		if entering {
+			r.out(w, delTag)
+		} else {
+			r.out(w, delCloseTag)
+		}
+	case HTMLSpan:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.out(w, node.Literal)
+	case Link:
+		// mark it but don't link it if it is not a safe link: no smartypants
+		dest := node.LinkData.Destination
+		if needSkipLink(r.Flags, dest) {
+			if entering {
+				r.out(w, ttTag)
+			} else {
+				r.out(w, ttCloseTag)
+			}
+		} else {
+			if entering {
+				dest = r.addAbsPrefix(dest)
+				var hrefBuf bytes.Buffer
+				hrefBuf.WriteString("href=\"")
+				escLink(&hrefBuf, dest)
+				hrefBuf.WriteByte('"')
+				attrs = append(attrs, hrefBuf.String())
+				if node.NoteID != 0 {
+					r.out(w, footnoteRef(r.FootnoteAnchorPrefix, node))
+					break
+				}
+				attrs = appendLinkAttrs(attrs, r.Flags, dest)
+				if len(node.LinkData.Title) > 0 {
+					var titleBuff bytes.Buffer
+					titleBuff.WriteString("title=\"")
+					escapeHTML(&titleBuff, node.LinkData.Title)
+					titleBuff.WriteByte('"')
+					attrs = append(attrs, titleBuff.String())
+				}
+				r.tag(w, aTag, attrs)
+			} else {
+				if node.NoteID != 0 {
+					break
+				}
+				r.out(w, aCloseTag)
+			}
+		}
+	case Image:
+		if r.Flags&SkipImages != 0 {
+			return SkipChildren
+		}
+		if entering {
+			dest := node.LinkData.Destination
+			dest = r.addAbsPrefix(dest)
+			if r.disableTags == 0 {
+				//if options.safe && potentiallyUnsafe(dest) {
+				//out(w, `<img src="" alt="`)
+				//} else {
+				r.out(w, []byte(`<img src="`))
+				escLink(w, dest)
+				r.out(w, []byte(`" alt="`))
+				//}
+			}
+			r.disableTags++
+		} else {
+			r.disableTags--
+			if r.disableTags == 0 {
+				if node.LinkData.Title != nil {
+					r.out(w, []byte(`" title="`))
+					escapeHTML(w, node.LinkData.Title)
+				}
+				r.out(w, []byte(`" />`))
+			}
+		}
+	case Code:
+		r.out(w, codeTag)
+		escapeAllHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+	case Document:
+		break
+	case Paragraph:
+		if skipParagraphTags(node) {
+			break
+		}
+		if entering {
+			// TODO: untangle this clusterfuck about when the newlines need
+			// to be added and when not.
+			if node.Prev != nil {
+				switch node.Prev.Type {
+				case HTMLBlock, List, Paragraph, Heading, CodeBlock, BlockQuote, HorizontalRule:
+					r.cr(w)
+				}
+			}
+			if node.Parent.Type == BlockQuote && node.Prev == nil {
+				r.cr(w)
+			}
+			r.out(w, pTag)
+		} else {
+			r.out(w, pCloseTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case BlockQuote:
+		if entering {
+			r.cr(w)
+			r.out(w, blockquoteTag)
+		} else {
+			r.out(w, blockquoteCloseTag)
+			r.cr(w)
+		}
+	case HTMLBlock:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.cr(w)
+		r.out(w, node.Literal)
+		r.cr(w)
+	case Heading:
+		headingLevel := r.HTMLRendererParameters.HeadingLevelOffset + node.Level
+		openTag, closeTag := headingTagsFromLevel(headingLevel)
+		if entering {
+			if node.IsTitleblock {
+				attrs = append(attrs, `class="title"`)
+			}
+			if node.HeadingID != "" {
+				id := r.ensureUniqueHeadingID(node.HeadingID)
+				if r.HeadingIDPrefix != "" {
+					id = r.HeadingIDPrefix + id
+				}
+				if r.HeadingIDSuffix != "" {
+					id = id + r.HeadingIDSuffix
+				}
+				attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
+			}
+			r.cr(w)
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case HorizontalRule:
+		r.cr(w)
+		r.outHRTag(w)
+		r.cr(w)
+	case List:
+		openTag := ulTag
+		closeTag := ulCloseTag
+		if node.ListFlags&ListTypeOrdered != 0 {
+			openTag = olTag
+			closeTag = olCloseTag
+		}
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = dlTag
+			closeTag = dlCloseTag
+		}
+		if entering {
+			if node.IsFootnotesList {
+				r.out(w, footnotesDivBytes)
+				r.outHRTag(w)
+				r.cr(w)
+			}
+			r.cr(w)
+			if node.Parent.Type == Item && node.Parent.Parent.Tight {
+				r.cr(w)
+			}
+			r.tag(w, openTag[:len(openTag)-1], attrs)
+			r.cr(w)
+		} else {
+			r.out(w, closeTag)
+			//cr(w)
+			//if node.parent.Type != Item {
+			//	cr(w)
+			//}
+			if node.Parent.Type == Item && node.Next != nil {
+				r.cr(w)
+			}
+			if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
+				r.cr(w)
+			}
+			if node.IsFootnotesList {
+				r.out(w, footnotesCloseDivBytes)
+			}
+		}
+	case Item:
+		openTag := liTag
+		closeTag := liCloseTag
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = ddTag
+			closeTag = ddCloseTag
+		}
+		if node.ListFlags&ListTypeTerm != 0 {
+			openTag = dtTag
+			closeTag = dtCloseTag
+		}
+		if entering {
+			if itemOpenCR(node) {
+				r.cr(w)
+			}
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				r.out(w, footnoteItem(r.FootnoteAnchorPrefix, slug))
+				break
+			}
+			r.out(w, openTag)
+		} else {
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				if r.Flags&FootnoteReturnLinks != 0 {
+					r.out(w, footnoteReturnLink(r.FootnoteAnchorPrefix, r.FootnoteReturnLinkContents, slug))
+				}
+			}
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case CodeBlock:
+		attrs = appendLanguageAttr(attrs, node.Info)
+		r.cr(w)
+		r.out(w, preTag)
+		r.tag(w, codeTag[:len(codeTag)-1], attrs)
+		escapeAllHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+		r.out(w, preCloseTag)
+		if node.Parent.Type != Item {
+			r.cr(w)
+		}
+	case Table:
+		if entering {
+			r.cr(w)
+			r.out(w, tableTag)
+		} else {
+			r.out(w, tableCloseTag)
+			r.cr(w)
+		}
+	case TableCell:
+		openTag := tdTag
+		closeTag := tdCloseTag
+		if node.IsHeader {
+			openTag = thTag
+			closeTag = thCloseTag
+		}
+		if entering {
+			align := cellAlignment(node.Align)
+			if align != "" {
+				attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
+			}
+			if node.Prev == nil {
+				r.cr(w)
+			}
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case TableHead:
+		if entering {
+			r.cr(w)
+			r.out(w, theadTag)
+		} else {
+			r.out(w, theadCloseTag)
+			r.cr(w)
+		}
+	case TableBody:
+		if entering {
+			r.cr(w)
+			r.out(w, tbodyTag)
+			// XXX: this is to adhere to a rather silly test. Should fix test.
+			if node.FirstChild == nil {
+				r.cr(w)
+			}
+		} else {
+			r.out(w, tbodyCloseTag)
+			r.cr(w)
+		}
+	case TableRow:
+		if entering {
+			r.cr(w)
+			r.out(w, trTag)
+		} else {
+			r.out(w, trCloseTag)
+			r.cr(w)
+		}
+	default:
+		panic("Unknown node type " + node.Type.String())
+	}
+	return GoToNext
+}
+
+// RenderHeader writes HTML document preamble and TOC if requested.
+func (r *HTMLRenderer) RenderHeader(w io.Writer, ast *Node) {
+	r.writeDocumentHeader(w)
+	if r.Flags&TOC != 0 {
+		r.writeTOC(w, ast)
+	}
+}
+
+// RenderFooter writes HTML document footer.
+func (r *HTMLRenderer) RenderFooter(w io.Writer, ast *Node) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	io.WriteString(w, "\n</body>\n</html>\n")
+}
+
+func (r *HTMLRenderer) writeDocumentHeader(w io.Writer) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	ending := ""
+	if r.Flags&UseXHTML != 0 {
+		io.WriteString(w, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
+		io.WriteString(w, "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
+		io.WriteString(w, "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
+		ending = " /"
+	} else {
+		io.WriteString(w, "<!DOCTYPE html>\n")
+		io.WriteString(w, "<html>\n")
+	}
+	io.WriteString(w, "<head>\n")
+	io.WriteString(w, "  <title>")
+	if r.Flags&Smartypants != 0 {
+		r.sr.Process(w, []byte(r.Title))
+	} else {
+		escapeHTML(w, []byte(r.Title))
+	}
+	io.WriteString(w, "</title>\n")
+	io.WriteString(w, "  <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
+	io.WriteString(w, Version)
+	io.WriteString(w, "\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	io.WriteString(w, "  <meta charset=\"utf-8\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	if r.CSS != "" {
+		io.WriteString(w, "  <link rel=\"stylesheet\" type=\"text/css\" href=\"")
+		escapeHTML(w, []byte(r.CSS))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	if r.Icon != "" {
+		io.WriteString(w, "  <link rel=\"icon\" type=\"image/x-icon\" href=\"")
+		escapeHTML(w, []byte(r.Icon))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	io.WriteString(w, "</head>\n")
+	io.WriteString(w, "<body>\n\n")
+}
+
+func (r *HTMLRenderer) writeTOC(w io.Writer, ast *Node) {
+	buf := bytes.Buffer{}
+
+	inHeading := false
+	tocLevel := 0
+	headingCount := 0
+
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Heading && !node.HeadingData.IsTitleblock {
+			inHeading = entering
+			if entering {
+				node.HeadingID = fmt.Sprintf("toc_%d", headingCount)
+				if node.Level == tocLevel {
+					buf.WriteString("</li>\n\n<li>")
+				} else if node.Level < tocLevel {
+					for node.Level < tocLevel {
+						tocLevel--
+						buf.WriteString("</li>\n</ul>")
+					}
+					buf.WriteString("</li>\n\n<li>")
+				} else {
+					for node.Level > tocLevel {
+						tocLevel++
+						buf.WriteString("\n<ul>\n<li>")
+					}
+				}
+
+				fmt.Fprintf(&buf, `<a href="#toc_%d">`, headingCount)
+				headingCount++
+			} else {
+				buf.WriteString("</a>")
+			}
+			return GoToNext
+		}
+
+		if inHeading {
+			return r.RenderNode(&buf, node, entering)
+		}
+
+		return GoToNext
+	})
+
+	for ; tocLevel > 0; tocLevel-- {
+		buf.WriteString("</li>\n</ul>")
+	}
+
+	if buf.Len() > 0 {
+		io.WriteString(w, "<nav>\n")
+		w.Write(buf.Bytes())
+		io.WriteString(w, "\n\n</nav>\n")
+	}
+	r.lastOutputLen = buf.Len()
+}

vendor/github.com/russross/blackfriday/v2/markdown.go

@@ -0,0 +1,950 @@
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"unicode/utf8"
+)
+
+//
+// Markdown parsing and processing
+//
+
+// Version string of the package. Appears in the rendered document when
+// CompletePage flag is on.
+const Version = "2.0"
+
+// Extensions is a bitwise or'ed collection of enabled Blackfriday's
+// extensions.
+type Extensions int
+
+// These are the supported markdown parsing extensions.
+// OR these values together to select multiple extensions.
+const (
+	NoExtensions           Extensions = 0
+	NoIntraEmphasis        Extensions = 1 << iota // Ignore emphasis markers inside words
+	Tables                                        // Render tables
+	FencedCode                                    // Render fenced code blocks
+	Autolink                                      // Detect embedded URLs that are not explicitly marked
+	Strikethrough                                 // Strikethrough text using ~~test~~
+	LaxHTMLBlocks                                 // Loosen up HTML block parsing rules
+	SpaceHeadings                                 // Be strict about prefix heading rules
+	HardLineBreak                                 // Translate newlines into line breaks
+	TabSizeEight                                  // Expand tabs to eight spaces instead of four
+	Footnotes                                     // Pandoc-style footnotes
+	NoEmptyLineBeforeBlock                        // No need to insert an empty line to start a (code, quote, ordered list, unordered list) block
+	HeadingIDs                                    // specify heading IDs  with {#id}
+	Titleblock                                    // Titleblock ala pandoc
+	AutoHeadingIDs                                // Create the heading ID from the text
+	BackslashLineBreak                            // Translate trailing backslashes into line breaks
+	DefinitionLists                               // Render definition lists
+
+	CommonHTMLFlags HTMLFlags = UseXHTML | Smartypants |
+		SmartypantsFractions | SmartypantsDashes | SmartypantsLatexDashes
+
+	CommonExtensions Extensions = NoIntraEmphasis | Tables | FencedCode |
+		Autolink | Strikethrough | SpaceHeadings | HeadingIDs |
+		BackslashLineBreak | DefinitionLists
+)
+
+// ListType contains bitwise or'ed flags for list and list item objects.
+type ListType int
+
+// These are the possible flag values for the ListItem renderer.
+// Multiple flag values may be ORed together.
+// These are mostly of interest if you are writing a new output format.
+const (
+	ListTypeOrdered ListType = 1 << iota
+	ListTypeDefinition
+	ListTypeTerm
+
+	ListItemContainsBlock
+	ListItemBeginningOfList // TODO: figure out if this is of any use now
+	ListItemEndOfList
+)
+
+// CellAlignFlags holds a type of alignment in a table cell.
+type CellAlignFlags int
+
+// These are the possible flag values for the table cell renderer.
+// Only a single one of these values will be used; they are not ORed together.
+// These are mostly of interest if you are writing a new output format.
+const (
+	TableAlignmentLeft CellAlignFlags = 1 << iota
+	TableAlignmentRight
+	TableAlignmentCenter = (TableAlignmentLeft | TableAlignmentRight)
+)
+
+// The size of a tab stop.
+const (
+	TabSizeDefault = 4
+	TabSizeDouble  = 8
+)
+
+// blockTags is a set of tags that are recognized as HTML block tags.
+// Any of these can be included in markdown text without special escaping.
+var blockTags = map[string]struct{}{
+	"blockquote": {},
+	"del":        {},
+	"div":        {},
+	"dl":         {},
+	"fieldset":   {},
+	"form":       {},
+	"h1":         {},
+	"h2":         {},
+	"h3":         {},
+	"h4":         {},
+	"h5":         {},
+	"h6":         {},
+	"iframe":     {},
+	"ins":        {},
+	"math":       {},
+	"noscript":   {},
+	"ol":         {},
+	"pre":        {},
+	"p":          {},
+	"script":     {},
+	"style":      {},
+	"table":      {},
+	"ul":         {},
+
+	// HTML5
+	"address":    {},
+	"article":    {},
+	"aside":      {},
+	"canvas":     {},
+	"figcaption": {},
+	"figure":     {},
+	"footer":     {},
+	"header":     {},
+	"hgroup":     {},
+	"main":       {},
+	"nav":        {},
+	"output":     {},
+	"progress":   {},
+	"section":    {},
+	"video":      {},
+}
+
+// Renderer is the rendering interface. This is mostly of interest if you are
+// implementing a new rendering format.
+//
+// Only an HTML implementation is provided in this repository, see the README
+// for external implementations.
+type Renderer interface {
+	// RenderNode is the main rendering method. It will be called once for
+	// every leaf node and twice for every non-leaf node (first with
+	// entering=true, then with entering=false). The method should write its
+	// rendition of the node to the supplied writer w.
+	RenderNode(w io.Writer, node *Node, entering bool) WalkStatus
+
+	// RenderHeader is a method that allows the renderer to produce some
+	// content preceding the main body of the output document. The header is
+	// understood in the broad sense here. For example, the default HTML
+	// renderer will write not only the HTML document preamble, but also the
+	// table of contents if it was requested.
+	//
+	// The method will be passed an entire document tree, in case a particular
+	// implementation needs to inspect it to produce output.
+	//
+	// The output should be written to the supplied writer w. If your
+	// implementation has no header to write, supply an empty implementation.
+	RenderHeader(w io.Writer, ast *Node)
+
+	// RenderFooter is a symmetric counterpart of RenderHeader.
+	RenderFooter(w io.Writer, ast *Node)
+}
+
+// Callback functions for inline parsing. One such function is defined
+// for each character that triggers a response when parsing inline data.
+type inlineParser func(p *Markdown, data []byte, offset int) (int, *Node)
+
+// Markdown is a type that holds extensions and the runtime state used by
+// Parse, and the renderer. You can not use it directly, construct it with New.
+type Markdown struct {
+	renderer          Renderer
+	referenceOverride ReferenceOverrideFunc
+	refs              map[string]*reference
+	inlineCallback    [256]inlineParser
+	extensions        Extensions
+	nesting           int
+	maxNesting        int
+	insideLink        bool
+
+	// Footnotes need to be ordered as well as available to quickly check for
+	// presence. If a ref is also a footnote, it's stored both in refs and here
+	// in notes. Slice is nil if footnotes not enabled.
+	notes []*reference
+
+	doc                  *Node
+	tip                  *Node // = doc
+	oldTip               *Node
+	lastMatchedContainer *Node // = doc
+	allClosed            bool
+}
+
+func (p *Markdown) getRef(refid string) (ref *reference, found bool) {
+	if p.referenceOverride != nil {
+		r, overridden := p.referenceOverride(refid)
+		if overridden {
+			if r == nil {
+				return nil, false
+			}
+			return &reference{
+				link:     []byte(r.Link),
+				title:    []byte(r.Title),
+				noteID:   0,
+				hasBlock: false,
+				text:     []byte(r.Text)}, true
+		}
+	}
+	// refs are case insensitive
+	ref, found = p.refs[strings.ToLower(refid)]
+	return ref, found
+}
+
+func (p *Markdown) finalize(block *Node) {
+	above := block.Parent
+	block.open = false
+	p.tip = above
+}
+
+func (p *Markdown) addChild(node NodeType, offset uint32) *Node {
+	return p.addExistingChild(NewNode(node), offset)
+}
+
+func (p *Markdown) addExistingChild(node *Node, offset uint32) *Node {
+	for !p.tip.canContain(node.Type) {
+		p.finalize(p.tip)
+	}
+	p.tip.AppendChild(node)
+	p.tip = node
+	return node
+}
+
+func (p *Markdown) closeUnmatchedBlocks() {
+	if !p.allClosed {
+		for p.oldTip != p.lastMatchedContainer {
+			parent := p.oldTip.Parent
+			p.finalize(p.oldTip)
+			p.oldTip = parent
+		}
+		p.allClosed = true
+	}
+}
+
+//
+//
+// Public interface
+//
+//
+
+// Reference represents the details of a link.
+// See the documentation in Options for more details on use-case.
+type Reference struct {
+	// Link is usually the URL the reference points to.
+	Link string
+	// Title is the alternate text describing the link in more detail.
+	Title string
+	// Text is the optional text to override the ref with if the syntax used was
+	// [refid][]
+	Text string
+}
+
+// ReferenceOverrideFunc is expected to be called with a reference string and
+// return either a valid Reference type that the reference string maps to or
+// nil. If overridden is false, the default reference logic will be executed.
+// See the documentation in Options for more details on use-case.
+type ReferenceOverrideFunc func(reference string) (ref *Reference, overridden bool)
+
+// New constructs a Markdown processor. You can use the same With* functions as
+// for Run() to customize parser's behavior and the renderer.
+func New(opts ...Option) *Markdown {
+	var p Markdown
+	for _, opt := range opts {
+		opt(&p)
+	}
+	p.refs = make(map[string]*reference)
+	p.maxNesting = 16
+	p.insideLink = false
+	docNode := NewNode(Document)
+	p.doc = docNode
+	p.tip = docNode
+	p.oldTip = docNode
+	p.lastMatchedContainer = docNode
+	p.allClosed = true
+	// register inline parsers
+	p.inlineCallback[' '] = maybeLineBreak
+	p.inlineCallback['*'] = emphasis
+	p.inlineCallback['_'] = emphasis
+	if p.extensions&Strikethrough != 0 {
+		p.inlineCallback['~'] = emphasis
+	}
+	p.inlineCallback['`'] = codeSpan
+	p.inlineCallback['\n'] = lineBreak
+	p.inlineCallback['['] = link
+	p.inlineCallback['<'] = leftAngle
+	p.inlineCallback['\\'] = escape
+	p.inlineCallback['&'] = entity
+	p.inlineCallback['!'] = maybeImage
+	p.inlineCallback['^'] = maybeInlineFootnote
+	if p.extensions&Autolink != 0 {
+		p.inlineCallback['h'] = maybeAutoLink
+		p.inlineCallback['m'] = maybeAutoLink
+		p.inlineCallback['f'] = maybeAutoLink
+		p.inlineCallback['H'] = maybeAutoLink
+		p.inlineCallback['M'] = maybeAutoLink
+		p.inlineCallback['F'] = maybeAutoLink
+	}
+	if p.extensions&Footnotes != 0 {
+		p.notes = make([]*reference, 0)
+	}
+	return &p
+}
+
+// Option customizes the Markdown processor's default behavior.
+type Option func(*Markdown)
+
+// WithRenderer allows you to override the default renderer.
+func WithRenderer(r Renderer) Option {
+	return func(p *Markdown) {
+		p.renderer = r
+	}
+}
+
+// WithExtensions allows you to pick some of the many extensions provided by
+// Blackfriday. You can bitwise OR them.
+func WithExtensions(e Extensions) Option {
+	return func(p *Markdown) {
+		p.extensions = e
+	}
+}
+
+// WithNoExtensions turns off all extensions and custom behavior.
+func WithNoExtensions() Option {
+	return func(p *Markdown) {
+		p.extensions = NoExtensions
+		p.renderer = NewHTMLRenderer(HTMLRendererParameters{
+			Flags: HTMLFlagsNone,
+		})
+	}
+}
+
+// WithRefOverride sets an optional function callback that is called every
+// time a reference is resolved.
+//
+// In Markdown, the link reference syntax can be made to resolve a link to
+// a reference instead of an inline URL, in one of the following ways:
+//
+//  * [link text][refid]
+//  * [refid][]
+//
+// Usually, the refid is defined at the bottom of the Markdown document. If
+// this override function is provided, the refid is passed to the override
+// function first, before consulting the defined refids at the bottom. If
+// the override function indicates an override did not occur, the refids at
+// the bottom will be used to fill in the link details.
+func WithRefOverride(o ReferenceOverrideFunc) Option {
+	return func(p *Markdown) {
+		p.referenceOverride = o
+	}
+}
+
+// Run is the main entry point to Blackfriday. It parses and renders a
+// block of markdown-encoded text.
+//
+// The simplest invocation of Run takes one argument, input:
+//     output := Run(input)
+// This will parse the input with CommonExtensions enabled and render it with
+// the default HTMLRenderer (with CommonHTMLFlags).
+//
+// Variadic arguments opts can customize the default behavior. Since Markdown
+// type does not contain exported fields, you can not use it directly. Instead,
+// use the With* functions. For example, this will call the most basic
+// functionality, with no extensions:
+//     output := Run(input, WithNoExtensions())
+//
+// You can use any number of With* arguments, even contradicting ones. They
+// will be applied in order of appearance and the latter will override the
+// former:
+//     output := Run(input, WithNoExtensions(), WithExtensions(exts),
+//         WithRenderer(yourRenderer))
+func Run(input []byte, opts ...Option) []byte {
+	r := NewHTMLRenderer(HTMLRendererParameters{
+		Flags: CommonHTMLFlags,
+	})
+	optList := []Option{WithRenderer(r), WithExtensions(CommonExtensions)}
+	optList = append(optList, opts...)
+	parser := New(optList...)
+	ast := parser.Parse(input)
+	var buf bytes.Buffer
+	parser.renderer.RenderHeader(&buf, ast)
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		return parser.renderer.RenderNode(&buf, node, entering)
+	})
+	parser.renderer.RenderFooter(&buf, ast)
+	return buf.Bytes()
+}
+
+// Parse is an entry point to the parsing part of Blackfriday. It takes an
+// input markdown document and produces a syntax tree for its contents. This
+// tree can then be rendered with a default or custom renderer, or
+// analyzed/transformed by the caller to whatever non-standard needs they have.
+// The return value is the root node of the syntax tree.
+func (p *Markdown) Parse(input []byte) *Node {
+	p.block(input)
+	// Walk the tree and finish up some of unfinished blocks
+	for p.tip != nil {
+		p.finalize(p.tip)
+	}
+	// Walk the tree again and process inline markdown in each block
+	p.doc.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading || node.Type == TableCell {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
+	p.parseRefsToAST()
+	return p.doc
+}
+
+func (p *Markdown) parseRefsToAST() {
+	if p.extensions&Footnotes == 0 || len(p.notes) == 0 {
+		return
+	}
+	p.tip = p.doc
+	block := p.addBlock(List, nil)
+	block.IsFootnotesList = true
+	block.ListFlags = ListTypeOrdered
+	flags := ListItemBeginningOfList
+	// Note: this loop is intentionally explicit, not range-form. This is
+	// because the body of the loop will append nested footnotes to p.notes and
+	// we need to process those late additions. Range form would only walk over
+	// the fixed initial set.
+	for i := 0; i < len(p.notes); i++ {
+		ref := p.notes[i]
+		p.addExistingChild(ref.footnote, 0)
+		block := ref.footnote
+		block.ListFlags = flags | ListTypeOrdered
+		block.RefLink = ref.link
+		if ref.hasBlock {
+			flags |= ListItemContainsBlock
+			p.block(ref.title)
+		} else {
+			p.inline(block, ref.title)
+		}
+		flags &^= ListItemBeginningOfList | ListItemContainsBlock
+	}
+	above := block.Parent
+	finalizeList(block)
+	p.tip = above
+	block.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
+}
+
+//
+// Link references
+//
+// This section implements support for references that (usually) appear
+// as footnotes in a document, and can be referenced anywhere in the document.
+// The basic format is:
+//
+//    [1]: http://www.google.com/ "Google"
+//    [2]: http://www.github.com/ "Github"
+//
+// Anywhere in the document, the reference can be linked by referring to its
+// label, i.e., 1 and 2 in this example, as in:
+//
+//    This library is hosted on [Github][2], a git hosting site.
+//
+// Actual footnotes as specified in Pandoc and supported by some other Markdown
+// libraries such as php-markdown are also taken care of. They look like this:
+//
+//    This sentence needs a bit of further explanation.[^note]
+//
+//    [^note]: This is the explanation.
+//
+// Footnotes should be placed at the end of the document in an ordered list.
+// Finally, there are inline footnotes such as:
+//
+//    Inline footnotes^[Also supported.] provide a quick inline explanation,
+//    but are rendered at the bottom of the document.
+//
+
+// reference holds all information necessary for a reference-style links or
+// footnotes.
+//
+// Consider this markdown with reference-style links:
+//
+//     [link][ref]
+//
+//     [ref]: /url/ "tooltip title"
+//
+// It will be ultimately converted to this HTML:
+//
+//     <p><a href=\"/url/\" title=\"title\">link</a></p>
+//
+// And a reference structure will be populated as follows:
+//
+//     p.refs["ref"] = &reference{
+//         link: "/url/",
+//         title: "tooltip title",
+//     }
+//
+// Alternatively, reference can contain information about a footnote. Consider
+// this markdown:
+//
+//     Text needing a footnote.[^a]
+//
+//     [^a]: This is the note
+//
+// A reference structure will be populated as follows:
+//
+//     p.refs["a"] = &reference{
+//         link: "a",
+//         title: "This is the note",
+//         noteID: <some positive int>,
+//     }
+//
+// TODO: As you can see, it begs for splitting into two dedicated structures
+// for refs and for footnotes.
+type reference struct {
+	link     []byte
+	title    []byte
+	noteID   int // 0 if not a footnote ref
+	hasBlock bool
+	footnote *Node // a link to the Item node within a list of footnotes
+
+	text []byte // only gets populated by refOverride feature with Reference.Text
+}
+
+func (r *reference) String() string {
+	return fmt.Sprintf("{link: %q, title: %q, text: %q, noteID: %d, hasBlock: %v}",
+		r.link, r.title, r.text, r.noteID, r.hasBlock)
+}
+
+// Check whether or not data starts with a reference link.
+// If so, it is parsed and stored in the list of references
+// (in the render struct).
+// Returns the number of bytes to skip to move past it,
+// or zero if the first line is not a reference.
+func isReference(p *Markdown, data []byte, tabSize int) int {
+	// up to 3 optional leading spaces
+	if len(data) < 4 {
+		return 0
+	}
+	i := 0
+	for i < 3 && data[i] == ' ' {
+		i++
+	}
+
+	noteID := 0
+
+	// id part: anything but a newline between brackets
+	if data[i] != '[' {
+		return 0
+	}
+	i++
+	if p.extensions&Footnotes != 0 {
+		if i < len(data) && data[i] == '^' {
+			// we can set it to anything here because the proper noteIds will
+			// be assigned later during the second pass. It just has to be != 0
+			noteID = 1
+			i++
+		}
+	}
+	idOffset := i
+	for i < len(data) && data[i] != '\n' && data[i] != '\r' && data[i] != ']' {
+		i++
+	}
+	if i >= len(data) || data[i] != ']' {
+		return 0
+	}
+	idEnd := i
+	// footnotes can have empty ID, like this: [^], but a reference can not be
+	// empty like this: []. Break early if it's not a footnote and there's no ID
+	if noteID == 0 && idOffset == idEnd {
+		return 0
+	}
+	// spacer: colon (space | tab)* newline? (space | tab)*
+	i++
+	if i >= len(data) || data[i] != ':' {
+		return 0
+	}
+	i++
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i < len(data) && (data[i] == '\n' || data[i] == '\r') {
+		i++
+		if i < len(data) && data[i] == '\n' && data[i-1] == '\r' {
+			i++
+		}
+	}
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i >= len(data) {
+		return 0
+	}
+
+	var (
+		linkOffset, linkEnd   int
+		titleOffset, titleEnd int
+		lineEnd               int
+		raw                   []byte
+		hasBlock              bool
+	)
+
+	if p.extensions&Footnotes != 0 && noteID != 0 {
+		linkOffset, linkEnd, raw, hasBlock = scanFootnote(p, data, i, tabSize)
+		lineEnd = linkEnd
+	} else {
+		linkOffset, linkEnd, titleOffset, titleEnd, lineEnd = scanLinkRef(p, data, i)
+	}
+	if lineEnd == 0 {
+		return 0
+	}
+
+	// a valid ref has been found
+
+	ref := &reference{
+		noteID:   noteID,
+		hasBlock: hasBlock,
+	}
+
+	if noteID > 0 {
+		// reusing the link field for the id since footnotes don't have links
+		ref.link = data[idOffset:idEnd]
+		// if footnote, it's not really a title, it's the contained text
+		ref.title = raw
+	} else {
+		ref.link = data[linkOffset:linkEnd]
+		ref.title = data[titleOffset:titleEnd]
+	}
+
+	// id matches are case-insensitive
+	id := string(bytes.ToLower(data[idOffset:idEnd]))
+
+	p.refs[id] = ref
+
+	return lineEnd
+}
+
+func scanLinkRef(p *Markdown, data []byte, i int) (linkOffset, linkEnd, titleOffset, titleEnd, lineEnd int) {
+	// link: whitespace-free sequence, optionally between angle brackets
+	if data[i] == '<' {
+		i++
+	}
+	linkOffset = i
+	for i < len(data) && data[i] != ' ' && data[i] != '\t' && data[i] != '\n' && data[i] != '\r' {
+		i++
+	}
+	linkEnd = i
+	if data[linkOffset] == '<' && data[linkEnd-1] == '>' {
+		linkOffset++
+		linkEnd--
+	}
+
+	// optional spacer: (space | tab)* (newline | '\'' | '"' | '(' )
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i < len(data) && data[i] != '\n' && data[i] != '\r' && data[i] != '\'' && data[i] != '"' && data[i] != '(' {
+		return
+	}
+
+	// compute end-of-line
+	if i >= len(data) || data[i] == '\r' || data[i] == '\n' {
+		lineEnd = i
+	}
+	if i+1 < len(data) && data[i] == '\r' && data[i+1] == '\n' {
+		lineEnd++
+	}
+
+	// optional (space|tab)* spacer after a newline
+	if lineEnd > 0 {
+		i = lineEnd + 1
+		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+	}
+
+	// optional title: any non-newline sequence enclosed in '"() alone on its line
+	if i+1 < len(data) && (data[i] == '\'' || data[i] == '"' || data[i] == '(') {
+		i++
+		titleOffset = i
+
+		// look for EOL
+		for i < len(data) && data[i] != '\n' && data[i] != '\r' {
+			i++
+		}
+		if i+1 < len(data) && data[i] == '\n' && data[i+1] == '\r' {
+			titleEnd = i + 1
+		} else {
+			titleEnd = i
+		}
+
+		// step back
+		i--
+		for i > titleOffset && (data[i] == ' ' || data[i] == '\t') {
+			i--
+		}
+		if i > titleOffset && (data[i] == '\'' || data[i] == '"' || data[i] == ')') {
+			lineEnd = titleEnd
+			titleEnd = i
+		}
+	}
+
+	return
+}
+
+// The first bit of this logic is the same as Parser.listItem, but the rest
+// is much simpler. This function simply finds the entire block and shifts it
+// over by one tab if it is indeed a block (just returns the line if it's not).
+// blockEnd is the end of the section in the input buffer, and contents is the
+// extracted text that was shifted over one tab. It will need to be rendered at
+// the end of the document.
+func scanFootnote(p *Markdown, data []byte, i, indentSize int) (blockStart, blockEnd int, contents []byte, hasBlock bool) {
+	if i == 0 || len(data) == 0 {
+		return
+	}
+
+	// skip leading whitespace on first line
+	for i < len(data) && data[i] == ' ' {
+		i++
+	}
+
+	blockStart = i
+
+	// find the end of the line
+	blockEnd = i
+	for i < len(data) && data[i-1] != '\n' {
+		i++
+	}
+
+	// get working buffer
+	var raw bytes.Buffer
+
+	// put the first line into the working buffer
+	raw.Write(data[blockEnd:i])
+	blockEnd = i
+
+	// process the following lines
+	containsBlankLine := false
+
+gatherLines:
+	for blockEnd < len(data) {
+		i++
+
+		// find the end of this line
+		for i < len(data) && data[i-1] != '\n' {
+			i++
+		}
+
+		// if it is an empty line, guess that it is part of this item
+		// and move on to the next line
+		if p.isEmpty(data[blockEnd:i]) > 0 {
+			containsBlankLine = true
+			blockEnd = i
+			continue
+		}
+
+		n := 0
+		if n = isIndented(data[blockEnd:i], indentSize); n == 0 {
+			// this is the end of the block.
+			// we don't want to include this last line in the index.
+			break gatherLines
+		}
+
+		// if there were blank lines before this one, insert a new one now
+		if containsBlankLine {
+			raw.WriteByte('\n')
+			containsBlankLine = false
+		}
+
+		// get rid of that first tab, write to buffer
+		raw.Write(data[blockEnd+n : i])
+		hasBlock = true
+
+		blockEnd = i
+	}
+
+	if data[blockEnd-1] != '\n' {
+		raw.WriteByte('\n')
+	}
+
+	contents = raw.Bytes()
+
+	return
+}
+
+//
+//
+// Miscellaneous helper functions
+//
+//
+
+// Test if a character is a punctuation symbol.
+// Taken from a private function in regexp in the stdlib.
+func ispunct(c byte) bool {
+	for _, r := range []byte("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~") {
+		if c == r {
+			return true
+		}
+	}
+	return false
+}
+
+// Test if a character is a whitespace character.
+func isspace(c byte) bool {
+	return ishorizontalspace(c) || isverticalspace(c)
+}
+
+// Test if a character is a horizontal whitespace character.
+func ishorizontalspace(c byte) bool {
+	return c == ' ' || c == '\t'
+}
+
+// Test if a character is a vertical character.
+func isverticalspace(c byte) bool {
+	return c == '\n' || c == '\r' || c == '\f' || c == '\v'
+}
+
+// Test if a character is letter.
+func isletter(c byte) bool {
+	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
+}
+
+// Test if a character is a letter or a digit.
+// TODO: check when this is looking for ASCII alnum and when it should use unicode
+func isalnum(c byte) bool {
+	return (c >= '0' && c <= '9') || isletter(c)
+}
+
+// Replace tab characters with spaces, aligning to the next TAB_SIZE column.
+// always ends output with a newline
+func expandTabs(out *bytes.Buffer, line []byte, tabSize int) {
+	// first, check for common cases: no tabs, or only tabs at beginning of line
+	i, prefix := 0, 0
+	slowcase := false
+	for i = 0; i < len(line); i++ {
+		if line[i] == '\t' {
+			if prefix == i {
+				prefix++
+			} else {
+				slowcase = true
+				break
+			}
+		}
+	}
+
+	// no need to decode runes if all tabs are at the beginning of the line
+	if !slowcase {
+		for i = 0; i < prefix*tabSize; i++ {
+			out.WriteByte(' ')
+		}
+		out.Write(line[prefix:])
+		return
+	}
+
+	// the slow case: we need to count runes to figure out how
+	// many spaces to insert for each tab
+	column := 0
+	i = 0
+	for i < len(line) {
+		start := i
+		for i < len(line) && line[i] != '\t' {
+			_, size := utf8.DecodeRune(line[i:])
+			i += size
+			column++
+		}
+
+		if i > start {
+			out.Write(line[start:i])
+		}
+
+		if i >= len(line) {
+			break
+		}
+
+		for {
+			out.WriteByte(' ')
+			column++
+			if column%tabSize == 0 {
+				break
+			}
+		}
+
+		i++
+	}
+}
+
+// Find if a line counts as indented or not.
+// Returns number of characters the indent is (0 = not indented).
+func isIndented(data []byte, indentSize int) int {
+	if len(data) == 0 {
+		return 0
+	}
+	if data[0] == '\t' {
+		return 1
+	}
+	if len(data) < indentSize {
+		return 0
+	}
+	for i := 0; i < indentSize; i++ {
+		if data[i] != ' ' {
+			return 0
+		}
+	}
+	return indentSize
+}
+
+// Create a url-safe slug for fragments
+func slugify(in []byte) []byte {
+	if len(in) == 0 {
+		return in
+	}
+	out := make([]byte, 0, len(in))
+	sym := false
+
+	for _, ch := range in {
+		if isalnum(ch) {
+			sym = false
+			out = append(out, ch)
+		} else if sym {
+			continue
+		} else {
+			out = append(out, '-')
+			sym = true
+		}
+	}
+	var a, b int
+	var ch byte
+	for a, ch = range out {
+		if ch != '-' {
+			break
+		}
+	}
+	for b = len(out) - 1; b > 0; b-- {
+		if out[b] != '-' {
+			break
+		}
+	}
+	return out[a : b+1]
+}

vendor/github.com/russross/blackfriday/v2/node.go

@@ -0,0 +1,360 @@
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// NodeType specifies a type of a single node of a syntax tree. Usually one
+// node (and its type) corresponds to a single markdown feature, e.g. emphasis
+// or code block.
+type NodeType int
+
+// Constants for identifying different types of nodes. See NodeType.
+const (
+	Document NodeType = iota
+	BlockQuote
+	List
+	Item
+	Paragraph
+	Heading
+	HorizontalRule
+	Emph
+	Strong
+	Del
+	Link
+	Image
+	Text
+	HTMLBlock
+	CodeBlock
+	Softbreak
+	Hardbreak
+	Code
+	HTMLSpan
+	Table
+	TableCell
+	TableHead
+	TableBody
+	TableRow
+)
+
+var nodeTypeNames = []string{
+	Document:       "Document",
+	BlockQuote:     "BlockQuote",
+	List:           "List",
+	Item:           "Item",
+	Paragraph:      "Paragraph",
+	Heading:        "Heading",
+	HorizontalRule: "HorizontalRule",
+	Emph:           "Emph",
+	Strong:         "Strong",
+	Del:            "Del",
+	Link:           "Link",
+	Image:          "Image",
+	Text:           "Text",
+	HTMLBlock:      "HTMLBlock",
+	CodeBlock:      "CodeBlock",
+	Softbreak:      "Softbreak",
+	Hardbreak:      "Hardbreak",
+	Code:           "Code",
+	HTMLSpan:       "HTMLSpan",
+	Table:          "Table",
+	TableCell:      "TableCell",
+	TableHead:      "TableHead",
+	TableBody:      "TableBody",
+	TableRow:       "TableRow",
+}
+
+func (t NodeType) String() string {
+	return nodeTypeNames[t]
+}
+
+// ListData contains fields relevant to a List and Item node type.
+type ListData struct {
+	ListFlags       ListType
+	Tight           bool   // Skip <p>s around list item data if true
+	BulletChar      byte   // '*', '+' or '-' in bullet lists
+	Delimiter       byte   // '.' or ')' after the number in ordered lists
+	RefLink         []byte // If not nil, turns this list item into a footnote item and triggers different rendering
+	IsFootnotesList bool   // This is a list of footnotes
+}
+
+// LinkData contains fields relevant to a Link node type.
+type LinkData struct {
+	Destination []byte // Destination is what goes into a href
+	Title       []byte // Title is the tooltip thing that goes in a title attribute
+	NoteID      int    // NoteID contains a serial number of a footnote, zero if it's not a footnote
+	Footnote    *Node  // If it's a footnote, this is a direct link to the footnote Node. Otherwise nil.
+}
+
+// CodeBlockData contains fields relevant to a CodeBlock node type.
+type CodeBlockData struct {
+	IsFenced    bool   // Specifies whether it's a fenced code block or an indented one
+	Info        []byte // This holds the info string
+	FenceChar   byte
+	FenceLength int
+	FenceOffset int
+}
+
+// TableCellData contains fields relevant to a TableCell node type.
+type TableCellData struct {
+	IsHeader bool           // This tells if it's under the header row
+	Align    CellAlignFlags // This holds the value for align attribute
+}
+
+// HeadingData contains fields relevant to a Heading node type.
+type HeadingData struct {
+	Level        int    // This holds the heading level number
+	HeadingID    string // This might hold heading ID, if present
+	IsTitleblock bool   // Specifies whether it's a title block
+}
+
+// Node is a single element in the abstract syntax tree of the parsed document.
+// It holds connections to the structurally neighboring nodes and, for certain
+// types of nodes, additional information that might be needed when rendering.
+type Node struct {
+	Type       NodeType // Determines the type of the node
+	Parent     *Node    // Points to the parent
+	FirstChild *Node    // Points to the first child, if any
+	LastChild  *Node    // Points to the last child, if any
+	Prev       *Node    // Previous sibling; nil if it's the first child
+	Next       *Node    // Next sibling; nil if it's the last child
+
+	Literal []byte // Text contents of the leaf nodes
+
+	HeadingData   // Populated if Type is Heading
+	ListData      // Populated if Type is List
+	CodeBlockData // Populated if Type is CodeBlock
+	LinkData      // Populated if Type is Link
+	TableCellData // Populated if Type is TableCell
+
+	content []byte // Markdown content of the block nodes
+	open    bool   // Specifies an open block node that has not been finished to process yet
+}
+
+// NewNode allocates a node of a specified type.
+func NewNode(typ NodeType) *Node {
+	return &Node{
+		Type: typ,
+		open: true,
+	}
+}
+
+func (n *Node) String() string {
+	ellipsis := ""
+	snippet := n.Literal
+	if len(snippet) > 16 {
+		snippet = snippet[:16]
+		ellipsis = "..."
+	}
+	return fmt.Sprintf("%s: '%s%s'", n.Type, snippet, ellipsis)
+}
+
+// Unlink removes node 'n' from the tree.
+// It panics if the node is nil.
+func (n *Node) Unlink() {
+	if n.Prev != nil {
+		n.Prev.Next = n.Next
+	} else if n.Parent != nil {
+		n.Parent.FirstChild = n.Next
+	}
+	if n.Next != nil {
+		n.Next.Prev = n.Prev
+	} else if n.Parent != nil {
+		n.Parent.LastChild = n.Prev
+	}
+	n.Parent = nil
+	n.Next = nil
+	n.Prev = nil
+}
+
+// AppendChild adds a node 'child' as a child of 'n'.
+// It panics if either node is nil.
+func (n *Node) AppendChild(child *Node) {
+	child.Unlink()
+	child.Parent = n
+	if n.LastChild != nil {
+		n.LastChild.Next = child
+		child.Prev = n.LastChild
+		n.LastChild = child
+	} else {
+		n.FirstChild = child
+		n.LastChild = child
+	}
+}
+
+// InsertBefore inserts 'sibling' immediately before 'n'.
+// It panics if either node is nil.
+func (n *Node) InsertBefore(sibling *Node) {
+	sibling.Unlink()
+	sibling.Prev = n.Prev
+	if sibling.Prev != nil {
+		sibling.Prev.Next = sibling
+	}
+	sibling.Next = n
+	n.Prev = sibling
+	sibling.Parent = n.Parent
+	if sibling.Prev == nil {
+		sibling.Parent.FirstChild = sibling
+	}
+}
+
+// IsContainer returns true if 'n' can contain children.
+func (n *Node) IsContainer() bool {
+	switch n.Type {
+	case Document:
+		fallthrough
+	case BlockQuote:
+		fallthrough
+	case List:
+		fallthrough
+	case Item:
+		fallthrough
+	case Paragraph:
+		fallthrough
+	case Heading:
+		fallthrough
+	case Emph:
+		fallthrough
+	case Strong:
+		fallthrough
+	case Del:
+		fallthrough
+	case Link:
+		fallthrough
+	case Image:
+		fallthrough
+	case Table:
+		fallthrough
+	case TableHead:
+		fallthrough
+	case TableBody:
+		fallthrough
+	case TableRow:
+		fallthrough
+	case TableCell:
+		return true
+	default:
+		return false
+	}
+}
+
+// IsLeaf returns true if 'n' is a leaf node.
+func (n *Node) IsLeaf() bool {
+	return !n.IsContainer()
+}
+
+func (n *Node) canContain(t NodeType) bool {
+	if n.Type == List {
+		return t == Item
+	}
+	if n.Type == Document || n.Type == BlockQuote || n.Type == Item {
+		return t != Item
+	}
+	if n.Type == Table {
+		return t == TableHead || t == TableBody
+	}
+	if n.Type == TableHead || n.Type == TableBody {
+		return t == TableRow
+	}
+	if n.Type == TableRow {
+		return t == TableCell
+	}
+	return false
+}
+
+// WalkStatus allows NodeVisitor to have some control over the tree traversal.
+// It is returned from NodeVisitor and different values allow Node.Walk to
+// decide which node to go to next.
+type WalkStatus int
+
+const (
+	// GoToNext is the default traversal of every node.
+	GoToNext WalkStatus = iota
+	// SkipChildren tells walker to skip all children of current node.
+	SkipChildren
+	// Terminate tells walker to terminate the traversal.
+	Terminate
+)
+
+// NodeVisitor is a callback to be called when traversing the syntax tree.
+// Called twice for every node: once with entering=true when the branch is
+// first visited, then with entering=false after all the children are done.
+type NodeVisitor func(node *Node, entering bool) WalkStatus
+
+// Walk is a convenience method that instantiates a walker and starts a
+// traversal of subtree rooted at n.
+func (n *Node) Walk(visitor NodeVisitor) {
+	w := newNodeWalker(n)
+	for w.current != nil {
+		status := visitor(w.current, w.entering)
+		switch status {
+		case GoToNext:
+			w.next()
+		case SkipChildren:
+			w.entering = false
+			w.next()
+		case Terminate:
+			return
+		}
+	}
+}
+
+type nodeWalker struct {
+	current  *Node
+	root     *Node
+	entering bool
+}
+
+func newNodeWalker(root *Node) *nodeWalker {
+	return &nodeWalker{
+		current:  root,
+		root:     root,
+		entering: true,
+	}
+}
+
+func (nw *nodeWalker) next() {
+	if (!nw.current.IsContainer() || !nw.entering) && nw.current == nw.root {
+		nw.current = nil
+		return
+	}
+	if nw.entering && nw.current.IsContainer() {
+		if nw.current.FirstChild != nil {
+			nw.current = nw.current.FirstChild
+			nw.entering = true
+		} else {
+			nw.entering = false
+		}
+	} else if nw.current.Next == nil {
+		nw.current = nw.current.Parent
+		nw.entering = false
+	} else {
+		nw.current = nw.current.Next
+		nw.entering = true
+	}
+}
+
+func dump(ast *Node) {
+	fmt.Println(dumpString(ast))
+}
+
+func dumpR(ast *Node, depth int) string {
+	if ast == nil {
+		return ""
+	}
+	indent := bytes.Repeat([]byte("\t"), depth)
+	content := ast.Literal
+	if content == nil {
+		content = ast.content
+	}
+	result := fmt.Sprintf("%s%s(%q)\n", indent, ast.Type, content)
+	for n := ast.FirstChild; n != nil; n = n.Next {
+		result += dumpR(n, depth+1)
+	}
+	return result
+}
+
+func dumpString(ast *Node) string {
+	return dumpR(ast, 0)
+}

vendor/github.com/russross/blackfriday/v2/smartypants.go

@@ -0,0 +1,457 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// SmartyPants rendering
+//
+//
+
+package blackfriday
+
+import (
+	"bytes"
+	"io"
+)
+
+// SPRenderer is a struct containing state of a Smartypants renderer.
+type SPRenderer struct {
+	inSingleQuote bool
+	inDoubleQuote bool
+	callbacks     [256]smartCallback
+}
+
+func wordBoundary(c byte) bool {
+	return c == 0 || isspace(c) || ispunct(c)
+}
+
+func tolower(c byte) byte {
+	if c >= 'A' && c <= 'Z' {
+		return c - 'A' + 'a'
+	}
+	return c
+}
+
+func isdigit(c byte) bool {
+	return c >= '0' && c <= '9'
+}
+
+func smartQuoteHelper(out *bytes.Buffer, previousChar byte, nextChar byte, quote byte, isOpen *bool, addNBSP bool) bool {
+	// edge of the buffer is likely to be a tag that we don't get to see,
+	// so we treat it like text sometimes
+
+	// enumerate all sixteen possibilities for (previousChar, nextChar)
+	// each can be one of {0, space, punct, other}
+	switch {
+	case previousChar == 0 && nextChar == 0:
+		// context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case isspace(previousChar) && nextChar == 0:
+		// [ "] might be [ "<code>foo...]
+		*isOpen = true
+	case ispunct(previousChar) && nextChar == 0:
+		// [!"] hmm... could be [Run!"] or [("<code>...]
+		*isOpen = false
+	case /* isnormal(previousChar) && */ nextChar == 0:
+		// [a"] is probably a close
+		*isOpen = false
+	case previousChar == 0 && isspace(nextChar):
+		// [" ] might be [...foo</code>" ]
+		*isOpen = false
+	case isspace(previousChar) && isspace(nextChar):
+		// [ " ] context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case ispunct(previousChar) && isspace(nextChar):
+		// [!" ] is probably a close
+		*isOpen = false
+	case /* isnormal(previousChar) && */ isspace(nextChar):
+		// [a" ] this is one of the easy cases
+		*isOpen = false
+	case previousChar == 0 && ispunct(nextChar):
+		// ["!] hmm... could be ["$1.95] or [</code>"!...]
+		*isOpen = false
+	case isspace(previousChar) && ispunct(nextChar):
+		// [ "!] looks more like [ "$1.95]
+		*isOpen = true
+	case ispunct(previousChar) && ispunct(nextChar):
+		// [!"!] context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case /* isnormal(previousChar) && */ ispunct(nextChar):
+		// [a"!] is probably a close
+		*isOpen = false
+	case previousChar == 0 /* && isnormal(nextChar) */ :
+		// ["a] is probably an open
+		*isOpen = true
+	case isspace(previousChar) /* && isnormal(nextChar) */ :
+		// [ "a] this is one of the easy cases
+		*isOpen = true
+	case ispunct(previousChar) /* && isnormal(nextChar) */ :
+		// [!"a] is probably an open
+		*isOpen = true
+	default:
+		// [a'b] maybe a contraction?
+		*isOpen = false
+	}
+
+	// Note that with the limited lookahead, this non-breaking
+	// space will also be appended to single double quotes.
+	if addNBSP && !*isOpen {
+		out.WriteString("&nbsp;")
+	}
+
+	out.WriteByte('&')
+	if *isOpen {
+		out.WriteByte('l')
+	} else {
+		out.WriteByte('r')
+	}
+	out.WriteByte(quote)
+	out.WriteString("quo;")
+
+	if addNBSP && *isOpen {
+		out.WriteString("&nbsp;")
+	}
+
+	return true
+}
+
+func (r *SPRenderer) smartSingleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 {
+		t1 := tolower(text[1])
+
+		if t1 == '\'' {
+			nextChar := byte(0)
+			if len(text) >= 3 {
+				nextChar = text[2]
+			}
+			if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
+				return 1
+			}
+		}
+
+		if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || wordBoundary(text[2])) {
+			out.WriteString("&rsquo;")
+			return 0
+		}
+
+		if len(text) >= 3 {
+			t2 := tolower(text[2])
+
+			if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) &&
+				(len(text) < 4 || wordBoundary(text[3])) {
+				out.WriteString("&rsquo;")
+				return 0
+			}
+		}
+	}
+
+	nextChar := byte(0)
+	if len(text) > 1 {
+		nextChar = text[1]
+	}
+	if smartQuoteHelper(out, previousChar, nextChar, 's', &r.inSingleQuote, false) {
+		return 0
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartParens(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 {
+		t1 := tolower(text[1])
+		t2 := tolower(text[2])
+
+		if t1 == 'c' && t2 == ')' {
+			out.WriteString("&copy;")
+			return 2
+		}
+
+		if t1 == 'r' && t2 == ')' {
+			out.WriteString("&reg;")
+			return 2
+		}
+
+		if len(text) >= 4 && t1 == 't' && t2 == 'm' && text[3] == ')' {
+			out.WriteString("&trade;")
+			return 3
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDash(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 {
+		if text[1] == '-' {
+			out.WriteString("&mdash;")
+			return 1
+		}
+
+		if wordBoundary(previousChar) && wordBoundary(text[1]) {
+			out.WriteString("&ndash;")
+			return 0
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDashLatex(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 && text[1] == '-' && text[2] == '-' {
+		out.WriteString("&mdash;")
+		return 2
+	}
+	if len(text) >= 2 && text[1] == '-' {
+		out.WriteString("&ndash;")
+		return 1
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartAmpVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte, addNBSP bool) int {
+	if bytes.HasPrefix(text, []byte("&quot;")) {
+		nextChar := byte(0)
+		if len(text) >= 7 {
+			nextChar = text[6]
+		}
+		if smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, addNBSP) {
+			return 5
+		}
+	}
+
+	if bytes.HasPrefix(text, []byte("&#0;")) {
+		return 3
+	}
+
+	out.WriteByte('&')
+	return 0
+}
+
+func (r *SPRenderer) smartAmp(angledQuotes, addNBSP bool) func(*bytes.Buffer, byte, []byte) int {
+	var quote byte = 'd'
+	if angledQuotes {
+		quote = 'a'
+	}
+
+	return func(out *bytes.Buffer, previousChar byte, text []byte) int {
+		return r.smartAmpVariant(out, previousChar, text, quote, addNBSP)
+	}
+}
+
+func (r *SPRenderer) smartPeriod(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 && text[1] == '.' && text[2] == '.' {
+		out.WriteString("&hellip;")
+		return 2
+	}
+
+	if len(text) >= 5 && text[1] == ' ' && text[2] == '.' && text[3] == ' ' && text[4] == '.' {
+		out.WriteString("&hellip;")
+		return 4
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartBacktick(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 && text[1] == '`' {
+		nextChar := byte(0)
+		if len(text) >= 3 {
+			nextChar = text[2]
+		}
+		if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
+			return 1
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartNumberGeneric(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
+		// is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b
+		// note: check for regular slash (/) or fraction slash (⁄, 0x2044, or 0xe2 81 84 in utf-8)
+		//       and avoid changing dates like 1/23/2005 into fractions.
+		numEnd := 0
+		for len(text) > numEnd && isdigit(text[numEnd]) {
+			numEnd++
+		}
+		if numEnd == 0 {
+			out.WriteByte(text[0])
+			return 0
+		}
+		denStart := numEnd + 1
+		if len(text) > numEnd+3 && text[numEnd] == 0xe2 && text[numEnd+1] == 0x81 && text[numEnd+2] == 0x84 {
+			denStart = numEnd + 3
+		} else if len(text) < numEnd+2 || text[numEnd] != '/' {
+			out.WriteByte(text[0])
+			return 0
+		}
+		denEnd := denStart
+		for len(text) > denEnd && isdigit(text[denEnd]) {
+			denEnd++
+		}
+		if denEnd == denStart {
+			out.WriteByte(text[0])
+			return 0
+		}
+		if len(text) == denEnd || wordBoundary(text[denEnd]) && text[denEnd] != '/' {
+			out.WriteString("<sup>")
+			out.Write(text[:numEnd])
+			out.WriteString("</sup>&frasl;<sub>")
+			out.Write(text[denStart:denEnd])
+			out.WriteString("</sub>")
+			return denEnd - 1
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartNumber(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
+		if text[0] == '1' && text[1] == '/' && text[2] == '2' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' {
+				out.WriteString("&frac12;")
+				return 2
+			}
+		}
+
+		if text[0] == '1' && text[1] == '/' && text[2] == '4' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
+				out.WriteString("&frac14;")
+				return 2
+			}
+		}
+
+		if text[0] == '3' && text[1] == '/' && text[2] == '4' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
+				out.WriteString("&frac34;")
+				return 2
+			}
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDoubleQuoteVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte) int {
+	nextChar := byte(0)
+	if len(text) > 1 {
+		nextChar = text[1]
+	}
+	if !smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, false) {
+		out.WriteString("&quot;")
+	}
+
+	return 0
+}
+
+func (r *SPRenderer) smartDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'd')
+}
+
+func (r *SPRenderer) smartAngledDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'a')
+}
+
+func (r *SPRenderer) smartLeftAngle(out *bytes.Buffer, previousChar byte, text []byte) int {
+	i := 0
+
+	for i < len(text) && text[i] != '>' {
+		i++
+	}
+
+	out.Write(text[:i+1])
+	return i
+}
+
+type smartCallback func(out *bytes.Buffer, previousChar byte, text []byte) int
+
+// NewSmartypantsRenderer constructs a Smartypants renderer object.
+func NewSmartypantsRenderer(flags HTMLFlags) *SPRenderer {
+	var (
+		r SPRenderer
+
+		smartAmpAngled      = r.smartAmp(true, false)
+		smartAmpAngledNBSP  = r.smartAmp(true, true)
+		smartAmpRegular     = r.smartAmp(false, false)
+		smartAmpRegularNBSP = r.smartAmp(false, true)
+
+		addNBSP = flags&SmartypantsQuotesNBSP != 0
+	)
+
+	if flags&SmartypantsAngledQuotes == 0 {
+		r.callbacks['"'] = r.smartDoubleQuote
+		if !addNBSP {
+			r.callbacks['&'] = smartAmpRegular
+		} else {
+			r.callbacks['&'] = smartAmpRegularNBSP
+		}
+	} else {
+		r.callbacks['"'] = r.smartAngledDoubleQuote
+		if !addNBSP {
+			r.callbacks['&'] = smartAmpAngled
+		} else {
+			r.callbacks['&'] = smartAmpAngledNBSP
+		}
+	}
+	r.callbacks['\''] = r.smartSingleQuote
+	r.callbacks['('] = r.smartParens
+	if flags&SmartypantsDashes != 0 {
+		if flags&SmartypantsLatexDashes == 0 {
+			r.callbacks['-'] = r.smartDash
+		} else {
+			r.callbacks['-'] = r.smartDashLatex
+		}
+	}
+	r.callbacks['.'] = r.smartPeriod
+	if flags&SmartypantsFractions == 0 {
+		r.callbacks['1'] = r.smartNumber
+		r.callbacks['3'] = r.smartNumber
+	} else {
+		for ch := '1'; ch <= '9'; ch++ {
+			r.callbacks[ch] = r.smartNumberGeneric
+		}
+	}
+	r.callbacks['<'] = r.smartLeftAngle
+	r.callbacks['`'] = r.smartBacktick
+	return &r
+}
+
+// Process is the entry point of the Smartypants renderer.
+func (r *SPRenderer) Process(w io.Writer, text []byte) {
+	mark := 0
+	for i := 0; i < len(text); i++ {
+		if action := r.callbacks[text[i]]; action != nil {
+			if i > mark {
+				w.Write(text[mark:i])
+			}
+			previousChar := byte(0)
+			if i > 0 {
+				previousChar = text[i-1]
+			}
+			var tmp bytes.Buffer
+			i += action(&tmp, previousChar, text[i:])
+			w.Write(tmp.Bytes())
+			mark = i + 1
+		}
+	}
+	if mark < len(text) {
+		w.Write(text[mark:])
+	}
+}

vendor/github.com/spf13/cobra/doc/man_docs.go

@@ -0,0 +1,246 @@
+// Copyright 2013-2023 The Cobra Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/cpuguy83/go-md2man/v2/md2man"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+// GenManTree will generate a man page for this command and all descendants
+// in the directory given. The header may be nil. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenManTree(cmd *cobra.Command, header *GenManHeader, dir string) error {
+	return GenManTreeFromOpts(cmd, GenManTreeOptions{
+		Header:           header,
+		Path:             dir,
+		CommandSeparator: "-",
+	})
+}
+
+// GenManTreeFromOpts generates a man page for the command and all descendants.
+// The pages are written to the opts.Path directory.
+func GenManTreeFromOpts(cmd *cobra.Command, opts GenManTreeOptions) error {
+	header := opts.Header
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenManTreeFromOpts(c, opts); err != nil {
+			return err
+		}
+	}
+	section := "1"
+	if header.Section != "" {
+		section = header.Section
+	}
+
+	separator := "_"
+	if opts.CommandSeparator != "" {
+		separator = opts.CommandSeparator
+	}
+	basename := strings.ReplaceAll(cmd.CommandPath(), " ", separator)
+	filename := filepath.Join(opts.Path, basename+"."+section)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	headerCopy := *header
+	return GenMan(cmd, &headerCopy, f)
+}
+
+// GenManTreeOptions is the options for generating the man pages.
+// Used only in GenManTreeFromOpts.
+type GenManTreeOptions struct {
+	Header           *GenManHeader
+	Path             string
+	CommandSeparator string
+}
+
+// GenManHeader is a lot like the .TH header at the start of man pages. These
+// include the title, section, date, source, and manual. We will use the
+// current time if Date is unset and will use "Auto generated by spf13/cobra"
+// if the Source is unset.
+type GenManHeader struct {
+	Title   string
+	Section string
+	Date    *time.Time
+	date    string
+	Source  string
+	Manual  string
+}
+
+// GenMan will generate a man page for the given command and write it to
+// w. The header argument may be nil, however obviously w may not.
+func GenMan(cmd *cobra.Command, header *GenManHeader, w io.Writer) error {
+	if header == nil {
+		header = &GenManHeader{}
+	}
+	if err := fillHeader(header, cmd.CommandPath(), cmd.DisableAutoGenTag); err != nil {
+		return err
+	}
+
+	b := genMan(cmd, header)
+	_, err := w.Write(md2man.Render(b))
+	return err
+}
+
+func fillHeader(header *GenManHeader, name string, disableAutoGen bool) error {
+	if header.Title == "" {
+		header.Title = strings.ToUpper(strings.ReplaceAll(name, " ", "\\-"))
+	}
+	if header.Section == "" {
+		header.Section = "1"
+	}
+	if header.Date == nil {
+		now := time.Now()
+		if epoch := os.Getenv("SOURCE_DATE_EPOCH"); epoch != "" {
+			unixEpoch, err := strconv.ParseInt(epoch, 10, 64)
+			if err != nil {
+				return fmt.Errorf("invalid SOURCE_DATE_EPOCH: %v", err)
+			}
+			now = time.Unix(unixEpoch, 0)
+		}
+		header.Date = &now
+	}
+	header.date = header.Date.Format("Jan 2006")
+	if header.Source == "" && !disableAutoGen {
+		header.Source = "Auto generated by spf13/cobra"
+	}
+	return nil
+}
+
+func manPreamble(buf io.StringWriter, header *GenManHeader, cmd *cobra.Command, dashedName string) {
+	description := cmd.Long
+	if len(description) == 0 {
+		description = cmd.Short
+	}
+
+	cobra.WriteStringAndCheck(buf, fmt.Sprintf(`%% "%s" "%s" "%s" "%s" "%s"
+# NAME
+`, header.Title, header.Section, header.date, header.Source, header.Manual))
+	cobra.WriteStringAndCheck(buf, fmt.Sprintf("%s \\- %s\n\n", dashedName, cmd.Short))
+	cobra.WriteStringAndCheck(buf, "# SYNOPSIS\n")
+	cobra.WriteStringAndCheck(buf, fmt.Sprintf("**%s**\n\n", cmd.UseLine()))
+	cobra.WriteStringAndCheck(buf, "# DESCRIPTION\n")
+	cobra.WriteStringAndCheck(buf, description+"\n\n")
+}
+
+func manPrintFlags(buf io.StringWriter, flags *pflag.FlagSet) {
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if len(flag.Deprecated) > 0 || flag.Hidden {
+			return
+		}
+		format := ""
+		if len(flag.Shorthand) > 0 && len(flag.ShorthandDeprecated) == 0 {
+			format = fmt.Sprintf("**-%s**, **--%s**", flag.Shorthand, flag.Name)
+		} else {
+			format = fmt.Sprintf("**--%s**", flag.Name)
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format += "["
+		}
+		if flag.Value.Type() == "string" {
+			// put quotes on the value
+			format += "=%q"
+		} else {
+			format += "=%s"
+		}
+		if len(flag.NoOptDefVal) > 0 {
+			format += "]"
+		}
+		format += "\n\t%s\n\n"
+		cobra.WriteStringAndCheck(buf, fmt.Sprintf(format, flag.DefValue, flag.Usage))
+	})
+}
+
+func manPrintOptions(buf io.StringWriter, command *cobra.Command) {
+	flags := command.NonInheritedFlags()
+	if flags.HasAvailableFlags() {
+		cobra.WriteStringAndCheck(buf, "# OPTIONS\n")
+		manPrintFlags(buf, flags)
+		cobra.WriteStringAndCheck(buf, "\n")
+	}
+	flags = command.InheritedFlags()
+	if flags.HasAvailableFlags() {
+		cobra.WriteStringAndCheck(buf, "# OPTIONS INHERITED FROM PARENT COMMANDS\n")
+		manPrintFlags(buf, flags)
+		cobra.WriteStringAndCheck(buf, "\n")
+	}
+}
+
+func genMan(cmd *cobra.Command, header *GenManHeader) []byte {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	// something like `rootcmd-subcmd1-subcmd2`
+	dashCommandName := strings.ReplaceAll(cmd.CommandPath(), " ", "-")
+
+	buf := new(bytes.Buffer)
+
+	manPreamble(buf, header, cmd, dashCommandName)
+	manPrintOptions(buf, cmd)
+	if len(cmd.Example) > 0 {
+		buf.WriteString("# EXAMPLE\n")
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n", cmd.Example))
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("# SEE ALSO\n")
+		seealsos := make([]string, 0)
+		if cmd.HasParent() {
+			parentPath := cmd.Parent().CommandPath()
+			dashParentPath := strings.ReplaceAll(parentPath, " ", "-")
+			seealso := fmt.Sprintf("**%s(%s)**", dashParentPath, header.Section)
+			seealsos = append(seealsos, seealso)
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, c := range children {
+			if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			seealso := fmt.Sprintf("**%s-%s(%s)**", dashCommandName, c.Name(), header.Section)
+			seealsos = append(seealsos, seealso)
+		}
+		buf.WriteString(strings.Join(seealsos, ", ") + "\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString(fmt.Sprintf("# HISTORY\n%s Auto generated by spf13/cobra\n", header.Date.Format("2-Jan-2006")))
+	}
+	return buf.Bytes()
+}

vendor/github.com/spf13/cobra/doc/md_docs.go

@@ -0,0 +1,158 @@
+// Copyright 2013-2023 The Cobra Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+const markdownExtension = ".md"
+
+func printOptions(buf *bytes.Buffer, cmd *cobra.Command, name string) error {
+	flags := cmd.NonInheritedFlags()
+	flags.SetOutput(buf)
+	if flags.HasAvailableFlags() {
+		buf.WriteString("### Options\n\n```\n")
+		flags.PrintDefaults()
+		buf.WriteString("```\n\n")
+	}
+
+	parentFlags := cmd.InheritedFlags()
+	parentFlags.SetOutput(buf)
+	if parentFlags.HasAvailableFlags() {
+		buf.WriteString("### Options inherited from parent commands\n\n```\n")
+		parentFlags.PrintDefaults()
+		buf.WriteString("```\n\n")
+	}
+	return nil
+}
+
+// GenMarkdown creates markdown output.
+func GenMarkdown(cmd *cobra.Command, w io.Writer) error {
+	return GenMarkdownCustom(cmd, w, func(s string) string { return s })
+}
+
+// GenMarkdownCustom creates custom markdown output.
+func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	buf := new(bytes.Buffer)
+	name := cmd.CommandPath()
+
+	buf.WriteString("## " + name + "\n\n")
+	buf.WriteString(cmd.Short + "\n\n")
+	if len(cmd.Long) > 0 {
+		buf.WriteString("### Synopsis\n\n")
+		buf.WriteString(cmd.Long + "\n\n")
+	}
+
+	if cmd.Runnable() {
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n\n", cmd.UseLine()))
+	}
+
+	if len(cmd.Example) > 0 {
+		buf.WriteString("### Examples\n\n")
+		buf.WriteString(fmt.Sprintf("```\n%s\n```\n\n", cmd.Example))
+	}
+
+	if err := printOptions(buf, cmd, name); err != nil {
+		return err
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("### SEE ALSO\n\n")
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			pname := parent.CommandPath()
+			link := pname + markdownExtension
+			link = strings.ReplaceAll(link, " ", "_")
+			buf.WriteString(fmt.Sprintf("* [%s](%s)\t - %s\n", pname, linkHandler(link), parent.Short))
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			cname := name + " " + child.Name()
+			link := cname + markdownExtension
+			link = strings.ReplaceAll(link, " ", "_")
+			buf.WriteString(fmt.Sprintf("* [%s](%s)\t - %s\n", cname, linkHandler(link), child.Short))
+		}
+		buf.WriteString("\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString("###### Auto generated by spf13/cobra on " + time.Now().Format("2-Jan-2006") + "\n")
+	}
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+// GenMarkdownTree will generate a markdown page for this command and all
+// descendants in the directory given. The header may be nil.
+// This function may not work correctly if your command names have `-` in them.
+// If you have `cmd` with two subcmds, `sub` and `sub-third`,
+// and `sub` has a subcommand called `third`, it is undefined which
+// help output will be in the file `cmd-sub-third.1`.
+func GenMarkdownTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenMarkdownTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+// GenMarkdownTreeCustom is the same as GenMarkdownTree, but
+// with custom filePrepender and linkHandler.
+func GenMarkdownTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenMarkdownTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.ReplaceAll(cmd.CommandPath(), " ", "_") + markdownExtension
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenMarkdownCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/spf13/cobra/doc/rest_docs.go

@@ -0,0 +1,186 @@
+// Copyright 2013-2023 The Cobra Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func printOptionsReST(buf *bytes.Buffer, cmd *cobra.Command, name string) error {
+	flags := cmd.NonInheritedFlags()
+	flags.SetOutput(buf)
+	if flags.HasAvailableFlags() {
+		buf.WriteString("Options\n")
+		buf.WriteString("~~~~~~~\n\n::\n\n")
+		flags.PrintDefaults()
+		buf.WriteString("\n")
+	}
+
+	parentFlags := cmd.InheritedFlags()
+	parentFlags.SetOutput(buf)
+	if parentFlags.HasAvailableFlags() {
+		buf.WriteString("Options inherited from parent commands\n")
+		buf.WriteString("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n::\n\n")
+		parentFlags.PrintDefaults()
+		buf.WriteString("\n")
+	}
+	return nil
+}
+
+// defaultLinkHandler for default ReST hyperlink markup
+func defaultLinkHandler(name, ref string) string {
+	return fmt.Sprintf("`%s <%s.rst>`_", name, ref)
+}
+
+// GenReST creates reStructured Text output.
+func GenReST(cmd *cobra.Command, w io.Writer) error {
+	return GenReSTCustom(cmd, w, defaultLinkHandler)
+}
+
+// GenReSTCustom creates custom reStructured Text output.
+func GenReSTCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string, string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	buf := new(bytes.Buffer)
+	name := cmd.CommandPath()
+
+	short := cmd.Short
+	long := cmd.Long
+	if len(long) == 0 {
+		long = short
+	}
+	ref := strings.ReplaceAll(name, " ", "_")
+
+	buf.WriteString(".. _" + ref + ":\n\n")
+	buf.WriteString(name + "\n")
+	buf.WriteString(strings.Repeat("-", len(name)) + "\n\n")
+	buf.WriteString(short + "\n\n")
+	buf.WriteString("Synopsis\n")
+	buf.WriteString("~~~~~~~~\n\n")
+	buf.WriteString("\n" + long + "\n\n")
+
+	if cmd.Runnable() {
+		buf.WriteString(fmt.Sprintf("::\n\n  %s\n\n", cmd.UseLine()))
+	}
+
+	if len(cmd.Example) > 0 {
+		buf.WriteString("Examples\n")
+		buf.WriteString("~~~~~~~~\n\n")
+		buf.WriteString(fmt.Sprintf("::\n\n%s\n\n", indentString(cmd.Example, "  ")))
+	}
+
+	if err := printOptionsReST(buf, cmd, name); err != nil {
+		return err
+	}
+	if hasSeeAlso(cmd) {
+		buf.WriteString("SEE ALSO\n")
+		buf.WriteString("~~~~~~~~\n\n")
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			pname := parent.CommandPath()
+			ref = strings.ReplaceAll(pname, " ", "_")
+			buf.WriteString(fmt.Sprintf("* %s \t - %s\n", linkHandler(pname, ref), parent.Short))
+			cmd.VisitParents(func(c *cobra.Command) {
+				if c.DisableAutoGenTag {
+					cmd.DisableAutoGenTag = c.DisableAutoGenTag
+				}
+			})
+		}
+
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			cname := name + " " + child.Name()
+			ref = strings.ReplaceAll(cname, " ", "_")
+			buf.WriteString(fmt.Sprintf("* %s \t - %s\n", linkHandler(cname, ref), child.Short))
+		}
+		buf.WriteString("\n")
+	}
+	if !cmd.DisableAutoGenTag {
+		buf.WriteString("*Auto generated by spf13/cobra on " + time.Now().Format("2-Jan-2006") + "*\n")
+	}
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+// GenReSTTree will generate a ReST page for this command and all
+// descendants in the directory given.
+// This function may not work correctly if your command names have `-` in them.
+// If you have `cmd` with two subcmds, `sub` and `sub-third`,
+// and `sub` has a subcommand called `third`, it is undefined which
+// help output will be in the file `cmd-sub-third.1`.
+func GenReSTTree(cmd *cobra.Command, dir string) error {
+	emptyStr := func(s string) string { return "" }
+	return GenReSTTreeCustom(cmd, dir, emptyStr, defaultLinkHandler)
+}
+
+// GenReSTTreeCustom is the same as GenReSTTree, but
+// with custom filePrepender and linkHandler.
+func GenReSTTreeCustom(cmd *cobra.Command, dir string, filePrepender func(string) string, linkHandler func(string, string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenReSTTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.ReplaceAll(cmd.CommandPath(), " ", "_") + ".rst"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenReSTCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}
+
+// indentString adapted from: https://github.com/kr/text/blob/main/indent.go
+func indentString(s, p string) string {
+	var res []byte
+	b := []byte(s)
+	prefix := []byte(p)
+	bol := true
+	for _, c := range b {
+		if bol && c != '\n' {
+			res = append(res, prefix...)
+		}
+		res = append(res, c)
+		bol = c == '\n'
+	}
+	return string(res)
+}

vendor/github.com/spf13/cobra/doc/util.go

@@ -0,0 +1,52 @@
+// Copyright 2013-2023 The Cobra Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+// Test to see if we have a reason to print See Also information in docs
+// Basically this is a test for a parent command or a subcommand which is
+// both not deprecated and not the autogenerated help command.
+func hasSeeAlso(cmd *cobra.Command) bool {
+	if cmd.HasParent() {
+		return true
+	}
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+// Temporary workaround for yaml lib generating incorrect yaml with long strings
+// that do not contain \n.
+func forceMultiLine(s string) string {
+	if len(s) > 60 && !strings.Contains(s, "\n") {
+		s += "\n"
+	}
+	return s
+}
+
+type byName []*cobra.Command
+
+func (s byName) Len() int           { return len(s) }
+func (s byName) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }

vendor/github.com/spf13/cobra/doc/yaml_docs.go

@@ -0,0 +1,175 @@
+// Copyright 2013-2023 The Cobra Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"gopkg.in/yaml.v3"
+)
+
+type cmdOption struct {
+	Name         string
+	Shorthand    string `yaml:",omitempty"`
+	DefaultValue string `yaml:"default_value,omitempty"`
+	Usage        string `yaml:",omitempty"`
+}
+
+type cmdDoc struct {
+	Name             string
+	Synopsis         string      `yaml:",omitempty"`
+	Description      string      `yaml:",omitempty"`
+	Usage            string      `yaml:",omitempty"`
+	Options          []cmdOption `yaml:",omitempty"`
+	InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
+	Example          string      `yaml:",omitempty"`
+	SeeAlso          []string    `yaml:"see_also,omitempty"`
+}
+
+// GenYamlTree creates yaml structured ref files for this command and all descendants
+// in the directory given. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenYamlTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenYamlTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+// GenYamlTreeCustom creates yaml structured ref files.
+func GenYamlTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenYamlTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.ReplaceAll(cmd.CommandPath(), " ", "_") + ".yaml"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenYamlCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}
+
+// GenYaml creates yaml output.
+func GenYaml(cmd *cobra.Command, w io.Writer) error {
+	return GenYamlCustom(cmd, w, func(s string) string { return s })
+}
+
+// GenYamlCustom creates custom yaml output.
+func GenYamlCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	cmd.InitDefaultHelpCmd()
+	cmd.InitDefaultHelpFlag()
+
+	yamlDoc := cmdDoc{}
+	yamlDoc.Name = cmd.CommandPath()
+
+	yamlDoc.Synopsis = forceMultiLine(cmd.Short)
+	yamlDoc.Description = forceMultiLine(cmd.Long)
+
+	if cmd.Runnable() {
+		yamlDoc.Usage = cmd.UseLine()
+	}
+
+	if len(cmd.Example) > 0 {
+		yamlDoc.Example = cmd.Example
+	}
+
+	flags := cmd.NonInheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.Options = genFlagResult(flags)
+	}
+	flags = cmd.InheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.InheritedOptions = genFlagResult(flags)
+	}
+
+	if hasSeeAlso(cmd) {
+		result := []string{}
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			result = append(result, parent.CommandPath()+" - "+parent.Short)
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			result = append(result, child.CommandPath()+" - "+child.Short)
+		}
+		yamlDoc.SeeAlso = result
+	}
+
+	final, err := yaml.Marshal(&yamlDoc)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	if _, err := w.Write(final); err != nil {
+		return err
+	}
+	return nil
+}
+
+func genFlagResult(flags *pflag.FlagSet) []cmdOption {
+	var result []cmdOption
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		// Todo, when we mark a shorthand is deprecated, but specify an empty message.
+		// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
+		// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
+		if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
+			opt := cmdOption{
+				flag.Name,
+				flag.Shorthand,
+				flag.DefValue,
+				forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		} else {
+			opt := cmdOption{
+				Name:         flag.Name,
+				DefaultValue: forceMultiLine(flag.DefValue),
+				Usage:        forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		}
+	})
+
+	return result
+}

vendor/modules.txt

@@ -29,6 +29,10 @@ github.com/containerd/log
 # github.com/containerd/platforms v1.0.0-rc.1
 ## explicit; go 1.20
 github.com/containerd/platforms
+# github.com/cpuguy83/go-md2man/v2 v2.0.6
+## explicit; go 1.12
+github.com/cpuguy83/go-md2man/v2
+github.com/cpuguy83/go-md2man/v2/md2man
 # github.com/creack/pty v1.1.24
 ## explicit; go 1.18
 github.com/creack/pty
@@ -37,6 +41,7 @@ github.com/creack/pty
 github.com/distribution/reference
 # github.com/docker/cli-docs-tool v0.9.0
 ## explicit; go 1.18
+github.com/docker/cli-docs-tool
 github.com/docker/cli-docs-tool/annotation
 # github.com/docker/distribution v2.8.3+incompatible
 ## explicit
@@ -269,12 +274,16 @@ github.com/prometheus/procfs/internal/util
 # github.com/rivo/uniseg v0.2.0
 ## explicit; go 1.12
 github.com/rivo/uniseg
+# github.com/russross/blackfriday/v2 v2.1.0
+## explicit
+github.com/russross/blackfriday/v2
 # github.com/sirupsen/logrus v1.9.3
 ## explicit; go 1.13
 github.com/sirupsen/logrus
 # github.com/spf13/cobra v1.8.1
 ## explicit; go 1.15
 github.com/spf13/cobra
+github.com/spf13/cobra/doc
 # github.com/spf13/pflag v1.0.6
 ## explicit; go 1.12
 github.com/spf13/pflag