release-pr.yml

name: release-pr

on:
  workflow_call:
    inputs:
      git_pr_release_branch_staging:
        type: string
        description: 'The branch name that the feature branches are merged into and is going to be merged into the "production" branch.'
        default: "release"
        required: false
      git_pr_release_branch_production:
        type: string
        description: "The branch name that is deployed in production environment."
        default: "main"
        required: false
      git_pr_release_template:
        type: string
        description: "The template file path (relative to the workidir top) for pull requests created. Its first line is used for the PR title, the rest for the body. This is an ERB template."
        default: ".git-pr-release-template"
        required: false
      override:
        type: boolean
        description: "If this value is true, this action overrides an existing branch and a pull request."
        default: false
        required: false
    secrets:
      token:
        required: true
      slack_webhook:
        required: true

jobs:
  job:
    runs-on: ubuntu-latest
    env:
      GITHUB_TOKEN: ${{ secrets.token }}
      GIT_PR_RELEASE_TOKEN: ${{ secrets.token }}
      GIT_PR_RELEASE_BRANCH_STAGING: ${{ inputs.git_pr_release_branch_staging }}
      GIT_PR_RELEASE_BRANCH_PRODUCTION: ${{ inputs.git_pr_release_branch_production }}
      GIT_PR_RELEASE_TEMPLATE: ${{ inputs.git_pr_release_template }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0 # Need to fetch merge history
          ref: ${{ github.event.inputs.branch_name }} # checkout branch

      - name: Check if release target exists by comparing the production branch and the default branch
        run: |
          git log --merges origin/$GIT_PR_RELEASE_BRANCH_PRODUCTION..origin/$(git branch --show-current) --pretty=format:%h > commits.txt
          test -s commits.txt # if file is not empty, it goes to the next step

      - name: Check if release branch exists
        if: ${{ !inputs.override }}
        run: |
          ! (git branch -a --format="%(refname:short)" | grep -cx "origin/$GIT_PR_RELEASE_BRANCH_STAGING")

      - name: Create new Branch
        run: |
          git switch -c $GIT_PR_RELEASE_BRANCH_STAGING
          git push origin $GIT_PR_RELEASE_BRANCH_STAGING

      - name: Determine which Ruby version to use
        id: ruby-version-check
        run: |
          if [ -e ".ruby-version" ]; then
            echo "version=.ruby-version" >> $GITHUB_OUTPUT
          else
            echo "version=3.1.2" >> $GITHUB_OUTPUT
          fi

      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ steps.ruby-version-check.outputs.version }}
          bundler-cache: true

      - name: Create a release pull request
        run: |
          gem install -N git-pr-release
          git-pr-release

      - name: Fetch created pull request info
        id: fetch
        run: |
          gh pr view $GIT_PR_RELEASE_BRANCH_STAGING --json "body,number" -t '{{ .number }}{{ printf "\n" }}{{ .body }}' > pr.txt
          users=$(grep -o -E "@[a-zA-Z0-9]([a-zA-Z0-9]?|[\-]?([a-zA-Z0-9])){0,38}" pr.txt | sort -u | xargs echo)
          number=$(head -n 1 pr.txt)
          echo "users=${users}" >> $GITHUB_OUTPUT
          echo "number=${number}" >> $GITHUB_OUTPUT

      - name: Notify of Slack
        uses: rtCamp/action-slack-notify@v2
        env:
          SLACK_WEBHOOK: ${{ secrets.slack_webhook }}
          SLACK_COLOR: "#1DD0B0"
          SLACK_TITLE: "${{ github.repository }} has changes to be released!"
          SLACK_MESSAGE: "Check https://github.com/${{ github.repository }}/pull/${{ steps.fetch.outputs.number }} ${{ steps.fetch.outputs.users }} "
          SLACK_FOOTER: ""
          SLACK_LINK_NAMES: true
          MSG_MINIMAL: true