autorelease.yml

name: Autorelease

on:
  schedule:
    - cron:  '0 */24 * * *'

jobs:
  do-release:
    runs-on: ubuntu-latest
    steps:
      - name: Checking auto code...
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          submodules: recursive

      - name: Fetching last yarn information...
        id: last_yarn_release
        run: |
          API_CONTENT=$(curl -sL https://api.github.com/repos/yarnpkg/yarn/releases/latest)
          echo "::set-output name=tag::$(echo "$API_CONTENT" | jq -r '.tag_name')"
          echo "::set-output name=url::$(echo "$API_CONTENT" | jq -r '.html_url')"
          echo "::set-output name=version::$(echo "$API_CONTENT" | jq -r '.tag_name' | cut -c2- )"

      - name: Getting last similar release tag...
        id: similar_release_tag
        run: |
          echo "::set-output name=value::$(git tag -l --sort=-committerdate | grep ^${{ steps.last_yarn_release.outputs.tag }} | grep - | head -n 1)"

      - name: Getting last similar release hash...
        id: similar_release_hash
        run: |
          if [ "${{ steps.similar_release_tag.outputs.value }}" == "" ]; then
             echo "::set-output name=value::"
          else
             echo "::set-output name=value::$(git show-ref -s ${{ steps.similar_release_tag.outputs.value }})"
          fi;

      - name: Calculating last release variant...
        id: last_release_variant
        run: |
          echo "::set-output name=value::$(echo '${{ steps.similar_release_tag.outputs.value }}' | cut -f2- -d- | cut -f2- -dp )"

      - name: Calculating new release variant...
        id: new_release_variant
        run: |
          VARIANT='${{ steps.last_release_variant.outputs.value }}'
          if [ "$VARIANT" == "" ]; then
             VARIANT=1
          elif [ "${{ steps.last_yarn_release.outputs.tag }}" == "${{ steps.similar_release_tag.outputs.value }}" ]; then
             VARIANT=1
          elif [ "${{ steps.similar_release_hash.outputs.value }}" != "$GITHUB_SHA" ]; then
             VARIANT=$(($VARIANT + 1))
          fi;
          echo "::set-output name=value::$VARIANT"

      - name: Generating release message...
        id: new_release_msg
        run: |
          NEWLINE=$'\n'
          NEW_RELEASE_MESSAGE="Installs [Yarn ${{ steps.last_yarn_release.outputs.tag }}](${{ steps.last_yarn_release.outputs.url }})"
          NEW_RELEASE_MESSAGE="${NEW_RELEASE_MESSAGE}${NEWLINE}Installer build is ${{ steps.new_release_variant.outputs.value }}"
          if [ "${{ steps.new_release_variant.outputs.value }}" != "1" ]; then
            CHANGES_BETWEEN_COMMITS=$(git log --oneline ${{ steps.similar_release_hash.outputs.value }}..HEAD | grep -v Merge | while read line ; do echo " * $line" ; done)
            NEW_RELEASE_MESSAGE="${NEW_RELEASE_MESSAGE}${NEWLINE}${NEWLINE}Installer changes:${NEWLINE}${CHANGES_BETWEEN_COMMITS}"
          fi;
          NEW_RELEASE_MESSAGE="${NEW_RELEASE_MESSAGE//'%'/'%25'}"
          NEW_RELEASE_MESSAGE="${NEW_RELEASE_MESSAGE//$'\n'/'%0A'}"
          NEW_RELEASE_MESSAGE="${NEW_RELEASE_MESSAGE//$'\r'/'%0D'}"
          echo "::set-output name=value::$NEW_RELEASE_MESSAGE"

      - name: Calculating new release tag...
        id: new_release_tag
        run: |
          echo "::set-output name=value::${{ steps.last_yarn_release.outputs.tag }}-p${{ steps.new_release_variant.outputs.value }}"

      - name: Creating composer.json...
        uses: DamianReeves/write-file-action@v1.0
        with:
          path: composer.json
          write-mode: overwrite
          contents: |
            {
              "name": "imponeer/composer-yarn-installer",
              "type": "metapackage",
              "description": "Installs specific yarn version in vendor/",
              "license": "MIT",
              "keywords": [
                "yarn",
                "frontend",
                "javascript"
              ],
              "authors": [
                {
                    "name": "Raimondas Rimkevičius",
                    "email": "github@mekdrop.name"
                }
              ],
              "require": {
                "mariusbuescher/node-composer": ">1.2.2"
              },
              "provide": {
                "yarnpkg/yarn": "${{ steps.last_yarn_release.outputs.version }}"
              }
            }

      - name: Trying to commit changes and tag it...
        uses: stefanzweifel/git-auto-commit-action@v4
        id: auto-commit-action
        with:
          commit_message: Yarn updated to ${{ steps.last_node_release.outputs.tag }}

      - name: Getting last commit hash...
        id: last_git_commit_data
        run: |
          echo "::set-output name=hash::$(git rev-parse --verify HEAD)"
        if: steps.auto-commit-action.outputs.changes_detected == 'true'

      - name: Creating release...
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.new_release_tag.outputs.value }}
          release_name: ${{ steps.new_release_tag.outputs.value }}
          body: ${{ steps.new_release_msg.outputs.value }}
          draft: false
          prerelease: false
          commitish: ${{ steps.last_git_commit_data.outputs.hash }}
        if: steps.auto-commit-action.outputs.changes_detected == 'true'