start-release-train.yml

name: Start Release Train

on:
  workflow_dispatch:
    inputs:
      version_number:
        description: 'Version number of the release'
        type: string
        required: true

env:
  LC_ALL: en_US.UTF-8
  LANG: en_US.UTF-8

concurrency:
  group: start-release-train-${{ inputs.version_number }}
  cancel-in-progress: true

jobs:
  create_release_branch:
    name: Create release branch and bump version
    runs-on: macos-14
    outputs:
      branch_name: ${{ steps.branching.outputs.branch_name }}
    steps:
      - uses: actions/checkout@v4

      - uses: ./.github/actions/prepare-dependencies

      - name: Setup Git user
        run: |
          git config --global user.name "Bitmovin Release Automation"
          git config --global user.email "support@bitmovin.com"

      - name: Set release branch name
        id: branching
        run: |
          branch_name="release/${{ inputs.version_number }}"
          echo "branch_name=$branch_name" >> $GITHUB_OUTPUT
          echo "$branch_name"

      - name: Create Release Branch
        run: |
          # Delete the release branch if already exists, useful in case we need to re-run this workflow
          git push origin --delete ${{ steps.branching.outputs.branch_name }} || true
          git checkout -b ${{ steps.branching.outputs.branch_name }}

      - name: Bump changelog version
        run: |
          sed -i'.bak' "s/\[Unreleased\]/\[${{ inputs.version_number }}\]/g" CHANGELOG.md
          awk 'BEGIN {count=0} /## \[/ {count++; if (count == 2) exit} {print}' CHANGELOG.md

      - name: Bump package version
        run: |
          dart pub global activate cider
          dart pub global run cider version ${{ inputs.version_number }}
          flutter pub get

      - name: Install pods to update Podfile.lock
        working-directory: example/ios
        run: pod install --repo-update

      - name: Commit version bump
        run: |
          git add CHANGELOG.md pubspec.yaml example/ios/Podfile.lock example/pubspec.lock
          git commit -m "chore: prepare release ${{ inputs.version_number }}"
          git push origin ${{ steps.branching.outputs.branch_name }}

  publish_dry_run:
    name: Dry run for publishing to pub.dev
    needs: create_release_branch
    runs-on: macos-14
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ needs.create_release_branch.outputs.branch_name }}

      - uses: ./.github/actions/prepare-dependencies

      - name: Publish dry run
        run: dart pub publish --dry-run