docker-cli/scripts/warn-outside-container
Sebastiaan van Stijn 94e08f2e2d
Makefile: don't warn "outside container" for some targets
This change allows some make targets to be ran outside the dev-container for
easier discovery and use:

- `make clean` can be used on the host (as artifacts created from within the
  development container are usually stored on the host).
- `make help` was already allowed
- `make dev` and `make shell` are added to the regular Makefile, to make it
  easier to create and start the development container.
- When attempting to run `make dev` from within the development container, a
  message is printed, and the target is cancelled:

      root@docker-cli-dev$ make dev
      you are already in the dev container

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-04-06 19:10:53 +02:00

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#!/usr/bin/env sh
set -eu
target="${1:-}"
if [ -z "${DISABLE_WARN_OUTSIDE_CONTAINER:-}" ]; then
case $target in
clean|dev|help|shell)
# no warning needed for these targets
;;
*)
(
echo
echo "\033[1mWARNING\033[0m: you are not in a container."
echo
echo 'Use "\033[1mmake dev\033[0m" to start an interactive development container,'
echo "use \"\033[1mmake -f docker.Makefile $target\033[0m\" to execute this target"
echo "in a container, or set \033[1mDISABLE_WARN_OUTSIDE_CONTAINER=1\033[0m to"
echo "disable this warning."
echo
echo "Press \033[1mCtrl+C\033[0m now to abort, or wait for the script to continue.."
echo
) >&2
sleep 5
;;
esac
fi