trigger-operator-builds.yaml

name: 1 - Trigger Operator Builds

on:
  workflow_dispatch:
    inputs:
      TARGET_BRANCH:
        description: 'RELEASE_BRANCH to checkout (e.g. release-1.17)'
        required: true
        type: string

permissions: {}

jobs:
  prepare-component-builds:
    name: Trigger Component Builds for ${{ inputs.TARGET_BRANCH }}
    runs-on: ubuntu-22.04
    permissions:
      contents: write         # To push branches
      pull-requests: write    # To create PRs

    steps:
      - name: Checkout code
        uses: actions/checkout@8410ad0602e1e429cee44a835ae9f77f654a6694  # v4.0.0
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
          ref: ${{ inputs.TARGET_BRANCH }}
      
      - name: Set up Git config
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Update BUILD file
        run: make update-build

      - name: Prepare metadata for PR
        id: metadata
        run: |
          BUILD=$(cat BUILD)
          TIMESTAMP=$(date -u +"%Y%m%d-%H%M%S")
          echo "build=$BUILD" >> $GITHUB_OUTPUT
          echo "ts=$TIMESTAMP" >> $GITHUB_OUTPUT

      - name: Create Pull Request
        id: create_pr
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "chore(build): bump to ${{ steps.metadata.outputs.build }}"
          branch: build/component-${{ steps.metadata.outputs.build }}-${{ steps.metadata.outputs.ts }}
          delete-branch: true
          title: "chore(build): bump to ${{ steps.metadata.outputs.build }}"
          body: |
            This PR updates the `BUILD` file with the next operator build version.

            **Build:** `${{ steps.metadata.outputs.build }}`

            Automatically generated for `${{ inputs.TARGET_BRANCH }}` using GitHub Actions..
          labels: |
            auto-merge
          base: ${{ inputs.TARGET_BRANCH }}

      # TODO: migrate to gh cli
      # ref: https://github.com/peter-evans/enable-pull-request-automerge?tab=readme-ov-file#enable-pull-request-auto-merge 
      - name: Enable auto-merge
        if: steps.create_pr.outputs.pull-request-number != ''
        uses: peter-evans/enable-pull-request-automerge@v3
        with:
          token: ${{ secrets.GH_TOKEN }}
          merge-method: squash
          pull-request-number: ${{ steps.create_pr.outputs.pull-request-number }}