github-actions/.github/workflows/release.yaml at main · chatbotkit/github-actions · GitHub

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name: Release

on:
  workflow_dispatch:

  push:
    branches:
      - main
    paths:
      - VERSION
      - .github/workflows/release.yaml

permissions:
  contents: write

jobs:
  release:
    if: github.actor != 'github-actions[bot]'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Verify main branch
        shell: bash
        run: |
          set -euo pipefail

          if [[ "${GITHUB_REF_NAME}" != "main" ]]; then
            echo "Releases can only be published from main" >&2
            exit 1
          fi

      - name: Resolve version
        id: version
        shell: bash
        run: |
          set -euo pipefail

          raw_version=$(tr -d '[:space:]' < VERSION)
          version=${raw_version#v}

          if [[ ! $version =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "VERSION must contain a semantic version like 1.2.3 or v1.2.3" >&2
            exit 1
          fi

          semver_tag="v$version"
          major_tag="v${version%%.*}"

          echo "version=$version" >> "$GITHUB_OUTPUT"
          echo "semver_tag=$semver_tag" >> "$GITHUB_OUTPUT"
          echo "major_tag=$major_tag" >> "$GITHUB_OUTPUT"

      - name: Check existing tags
        id: tags
        shell: bash
        run: |
          set -euo pipefail

          git fetch --tags --force

          semver_tag='${{ steps.version.outputs.semver_tag }}'
          current_sha=$(git rev-parse HEAD)

          if git rev-parse "$semver_tag" >/dev/null 2>&1; then
            existing_sha=$(git rev-list -n 1 "$semver_tag")

            if [[ "$existing_sha" == "$current_sha" ]]; then
              echo "publish=false" >> "$GITHUB_OUTPUT"
              echo "message=Tag $semver_tag already exists on this commit" >> "$GITHUB_OUTPUT"
              exit 0
            fi

            echo "Version tag $semver_tag already exists on a different commit" >&2
            exit 1
          fi

          echo "publish=true" >> "$GITHUB_OUTPUT"
          echo "message=Publishing $semver_tag from $current_sha" >> "$GITHUB_OUTPUT"

      - name: Create release tags
        if: steps.tags.outputs.publish == 'true'
        shell: bash
        run: |
          set -euo pipefail

          semver_tag='${{ steps.version.outputs.semver_tag }}'
          major_tag='${{ steps.version.outputs.major_tag }}'

          git config user.name 'github-actions[bot]'
          git config user.email '41898282+github-actions[bot]@users.noreply.github.com'

          git tag -a "$semver_tag" -m "Release $semver_tag"
          git tag -fa "$major_tag" -m "Release $semver_tag"

          git push origin "refs/tags/$semver_tag"
          git push origin "refs/tags/$major_tag" --force

      - name: Write summary
        shell: bash
        run: |
          {
            echo "## Release"
            echo
            echo "- Version: ${{ steps.version.outputs.semver_tag }}"
            echo "- Major tag: ${{ steps.version.outputs.major_tag }}"
            echo "- Result: ${{ steps.tags.outputs.message }}"
          } >> "$GITHUB_STEP_SUMMARY"