tag.yml

name: "Add version tag on push to main or test"

on:
  push:
    branches:
      - main
      - test

jobs:
  tag-on-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write
      statuses: read
      # Additional permissions are a workaround for gh cli trying to read projects during edit
      checks: read
      repository-projects: read
      issues: read
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # used by version (git) operations to find the most recent tag outside of this branch

      - name: Check files changed
        id: check-changes
        run: |
          # git diff --name-status ${{ github.event.before }}..${{ github.event.after }}
          diffs=$(git diff --name-status ${{ github.event.before }}..${{ github.event.after }} | wc -l)
          echo "diffs=$diffs"

          if ((diffs > 0)); then
            echo "setting has_diff true"
            echo "has_diff=true" >> "$GITHUB_OUTPUT"
          else
            echo "setting has_diff false"
            echo "has_diff=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Get next version
        uses: reecetech/version-increment@2024.10.1
        id: version
        if: ${{ steps.check-changes.outputs.has_diff == 'true' }}
        with:
          scheme: semver
          increment: minor
          # TODO: Could we use increment patch when bugfixes land on dev?

      - name: Create tag
        uses: actions/github-script@v7
        if: ${{ steps.check-changes.outputs.has_diff == 'true' }}
        with:
          github-token: ${{ secrets.WORKFLOW_TOKEN }}
          script: |
            github.rest.git.createRef({
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref: 'refs/tags/v${{ steps.version.outputs.version }}',
              sha: context.sha
            })

      - name: Update promotion PR (test)
        id: update-pr-test
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        if: ${{ steps.check-changes.outputs.has_diff == 'true' && github.ref == 'refs/heads/test' }}
        run: |
          # Debug output:
          gh pr list --json baseRefName,headRefName,number

          pr_number=$(gh pr list --json baseRefName,headRefName,number --jq 'map(select(.baseRefName == "main" and .headRefName == "test")) | .[0].number')
          echo "pr_number=$pr_number"
          echo "pr_number=$pr_number" >> "$GITHUB_OUTPUT"

          gh pr edit $pr_number --title "Merge test changes to main - ${{ steps.version.outputs.v-version }}"

      - name: Create or update version tag comment in promotion PR (test)
        uses: im-open/update-pr-comment@v1.2.2
        if: ${{ steps.check-changes.outputs.has_diff == 'true' && github.ref == 'refs/heads/test' }}
        with:
          pr-number: ${{ steps.update-pr-test.outputs.pr_number }}
          github-token: ${{ secrets.GITHUB_TOKEN }}
          comment-identifier: "current-tag"
          comment-content: "🕔 This PR currently contains the tag: ${{ steps.version.outputs.v-version }} which supersedes ${{ steps.version.outputs.current-v-version }}"