draft-release.yml

name: Create Draft Release

on:
  push:
    branches:
    - main
    - v1

permissions: read-all

concurrency:
  group: build-${{ github.event.pull_request.number || github.ref }}-${{github.workflow}}
  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

jobs:
  check:
    name: Check if release commit
    runs-on: ubuntu-latest
    if: "startsWith(github.event.head_commit.message, 'release: ')"
    steps:
    - name: Apply release-matching regexp to commit message
      id: regex-match
      uses: actions-ecosystem/action-regex-match@v2
      with:
        text: ${{ github.event.head_commit.message }}
        # Allow optional `v` prefix and GitHub PR reference suffix on first line only
        #   release: v1.2.3
        #   release: 1.2.3-beta.1
        #   release: v1.2.3-beta.1 (#9456)
        regex: '^release: v?([0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?)(\s+\(#[0-9]+\))?$'
        flags: m

    - name: Determine if applicable
      id: check-commit-message
      if: steps.regex-match.outputs.group1 != ''
      run: |
        echo "applicable=true" >> $GITHUB_OUTPUT
        echo "This is a release commit: ${{ steps.regex-match.outputs.group1 }}"
    outputs:
      applicable: ${{ steps.check-commit-message.outputs.applicable }}
      version: ${{ steps.regex-match.outputs.group1 }}

  release:
    name: Create Tag and Draft Release
    needs: check
    if: needs.check.outputs.applicable == 'true'
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v3
      with:
        fetch-depth: 0

    - name: Calculate Tag and Release names
      run: |
        echo TAG_NAME="v${{ needs.check.outputs.version }}" >> $GITHUB_ENV
        echo RELEASE_NAME="v${{ needs.check.outputs.version }} Release" >> $GITHUB_ENV

    - name: Create and push Tag
      run: |
        git config --local user.email "action@github.com"
        git config --local user.name "GitHub Action"
        git tag -a ${{ env.TAG_NAME }} -m "${{ env.RELEASE_NAME }}"
        git push origin ${{ env.TAG_NAME }}

    - name: Install gsutil
      run: |
        curl -Lo $HOME/gsutil.tar.gz https://storage.googleapis.com/pub/gsutil.tar.gz
        tar xfz $HOME/gsutil.tar.gz -C $HOME
        echo "$HOME/gsutil" >> $GITHUB_PATH

    - name: Download release artifacts
      run: |
        # Wait up to 60m for all artifacts to be available
        retries=20
        found=0
        while [ $found -lt 10 -a $retries -gt 0 ]
        do
          sleep 3m
          found=$(gsutil du  gs://skaffold/releases/${{ env.TAG_NAME }}/ | wc -l)
          retries=$((retries-1))
        done
        gsutil -m cp -r gs://skaffold/releases/${{ env.TAG_NAME }}/ $HOME

    - name: Create Release
      shell: bash
      run: |
        curl -fsSL https://github.com/github/hub/raw/master/script/get | bash -s 2.14.1
        body=$(git log -p --follow -1 CHANGELOG.md | grep '^\+' | cut -c 2- | tail -n +2)
        assets=()
        for asset in $HOME/${{ env.TAG_NAME }}/*; do
          assets+=("-a" "$asset")
        done
        bin/hub release create "${assets[@]}" -m "${{ env.RELEASE_NAME }}" -m "$body" --draft ${{ env.TAG_NAME }}
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}