.github: use actions/checkout@v2 again

Merged: https://github.com/ruby/ruby/pull/3100

.github/workflows/macos.yml

@@ -13,17 +13,10 @@ jobs:
         run: |
           sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setglobalstate off
           sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate
-      # Not using official actions/checkout because it's unstable and sometimes doesn't work for a fork.
+      - uses: actions/checkout@v2
-      - name: Checkout ruby
+        with:
-        run: |
+          fetch-depth: 128
-          git clone --single-branch --shallow-since=yesterday --branch=${GITHUB_REF#refs/heads/} https://github.com/${{ github.repository }} src
+          path: src
-          git -C src reset --hard "$GITHUB_SHA"
-        if: github.event_name == 'push'
-      - name: Checkout a pull request
-        run: |
-          git clone --single-branch --depth=50 --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
-          git -C src reset --hard ${{ github.event.pull_request.head.sha }}
-        if: github.event_name == 'pull_request'
       - run: ./src/tool/actions-commit-info.sh
         id: commit_info
       - name: Install libraries

.github/workflows/mingw.yml

@@ -27,19 +27,10 @@ jobs:
         run: |
           git config --system core.autocrlf false
           git config --system core.eol lf
-      # Not using official actions/checkout@v2 because it's unstable.
+      - uses: actions/checkout@v2
-      - name: Checkout ruby
+        with:
-        run: |
+          fetch-depth: 128
-          git clone --single-branch --shallow-since=yesterday --branch=${GITHUB_REF#refs/heads/} https://github.com/${{ github.repository }} src
+          path: src
-          git -C src reset --hard "$GITHUB_SHA"
-        if: github.event_name == 'push'
-        shell: bash
-      - name: Checkout a pull request
-        run: |
-          git clone --single-branch --depth=50 --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
-          git -C src reset --hard ${{ github.event.pull_request.head.sha }}
-        if: github.event_name == 'pull_request'
-        shell: bash
       - run: ./src/tool/actions-commit-info.sh
         shell: bash
         id: commit_info

.github/workflows/mjit.yml

@@ -18,17 +18,10 @@ jobs:
           set -x
           sudo apt-get update -q || :
           sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm-dev bison autoconf ruby
-      # Not using official actions/checkout because it's unstable and sometimes doesn't work for a fork.
+      - uses: actions/checkout@v2
-      - name: Checkout ruby
+        with:
-        run: |
+          fetch-depth: 128
-          git clone --single-branch --shallow-since=yesterday --branch=${GITHUB_REF#refs/heads/} https://github.com/${{ github.repository }} src
+          path: src
-          git -C src reset --hard "$GITHUB_SHA"
-        if: github.event_name == 'push'
-      - name: Checkout a pull request
-        run: |
-          git clone --single-branch --depth=50 --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
-          git -C src reset --hard ${{ github.event.pull_request.head.sha }}
-        if: github.event_name == 'pull_request'
       - run: ./src/tool/actions-commit-info.sh
         id: commit_info
       - name: Fixed world writable dirs

.github/workflows/ubuntu.yml

@@ -24,17 +24,10 @@ jobs:
           set -x
           sudo apt-get update -q || :
           sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm-dev bison autoconf ruby
-      # Not using official actions/checkout because it's unstable and sometimes doesn't work for a fork.
+      - uses: actions/checkout@v2
-      - name: Checkout ruby
+        with:
-        run: |
+          fetch-depth: 128
-          git clone --single-branch --shallow-since=yesterday --branch=${GITHUB_REF#refs/heads/} https://github.com/${{ github.repository }} src
+          path: src
-          git -C src reset --hard "$GITHUB_SHA"
-        if: github.event_name == 'push'
-      - name: Checkout a pull request
-        run: |
-          git clone --single-branch --depth=50 --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
-          git -C src reset --hard ${{ github.event.pull_request.head.sha }}
-        if: github.event_name == 'pull_request'
       - run: ./src/tool/actions-commit-info.sh
         id: commit_info
       - name: Fixed world writable dirs

.github/workflows/windows.yml

@@ -31,18 +31,10 @@ jobs:
       - name: Install libraries with chocolatey
         run: |
           choco install --no-progress openssl winflexbison3
-      # Not using official actions/checkout because it's unstable and sometimes doesn't work for a fork.
+      - uses: actions/checkout@v2
-      - name: Checkout ruby
+        with:
-        run: |
+          fetch-depth: 128
-          git clone --single-branch --shallow-since=yesterday --branch=${GITHUB_REF#refs/heads/} https://github.com/${{ github.repository }} src
+          path: src
-          git -C src reset --hard ${{ github.sha }}
-        if: github.event_name == 'push'
-        shell: bash
-      - name: Checkout a pull request
-        run: |
-          git clone --single-branch --depth=50 --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
-          git -C src reset --hard ${{ github.event.pull_request.head.sha }}
-        if: github.event_name == 'pull_request'
       - run: ./src/tool/actions-commit-info.sh
         shell: bash
         id: commit_info