buildimages-update.yml

name: Update buildimages

on:
  workflow_dispatch:
    inputs:
      images_id:
        description: 'Images ID'
        required: true
        type: string
      go_version:
        description: 'Go version'
        required: true
        type: string
      branch:
        description: 'Git branch to use'
        required: true
        type: string
      test_version:
        description: 'Whether the images are test images'
        required: true
        type: boolean
      include_otel_modules:
        description: 'Whether to also bump the Go version in modules used by OpenTelemetry'
        required: true
        type: boolean

jobs:
  open-go-update-pr:
    runs-on: ubuntu-latest
    permissions:
      contents: write # push commit and branch
      pull-requests: write

    steps:
      - name: Checkout branch
        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4

      - name: Fetch branch
        # this step needs the github repository to be already cloned locally
        id: branch_fetch
        run: |
          if git fetch origin "refs/heads/${{ inputs.branch }}"; then
            echo "RESULT=true" >> $GITHUB_OUTPUT
          else
            echo "RESULT=false" >> $GITHUB_OUTPUT
          fi

      - name: Checkout branch
        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
        if: ${{ steps.branch_fetch.outputs.RESULT == 'true' }}
        with:
          ref: ${{ inputs.branch }}

      - name: Setup Python and pip
        uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5.1.0
        with:
          # use Python < 3.12 so that distutil is still available by default
          python-version: 3.11
          cache: "pip"

      - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
        with:
          # use the go version from the input, not from the .go-version file
          # in case it's a Go update PR
          go-version: ${{ inputs.go_version }}

      - name: Install python dependencies
        run: |
          python3 -m pip install -r requirements.txt

      - name: Get current Go version
        id: current_go_version
        run: |
          echo "GO_VERSION=$(inv go-version)" >> $GITHUB_OUTPUT
    
      - name: Get current buildimage tag
        id: current_buildimage_tag
        run: |
            echo "BUILDIMAGE_TAG=$(inv pipeline.get-gitlab-config-image-tag)" >> $GITHUB_OUTPUT

      - name: Update buildimages IDs and Go version
        id: update_build_images
        env:
          TEST_VERSION_FLAG: ${{ inputs.test_version && '--test-version' || '--no-test-version' }}
          INCLUDE_OTEL_MODULES: ${{ inputs.include_otel_modules && '--include-otel-modules' || '' }}
        run: |
          if [ "${{ steps.current_go_version.outputs.GO_VERSION }}" = "${{ inputs.go_version }}" ]; then
            inv -e buildimages.update --image-tag ${{ inputs.images_id }} $TEST_VERSION_FLAG
            echo 'MESSAGE=Update buildimages ID to ${{ inputs.images_id }}' >> $GITHUB_OUTPUT
          else
            inv -e update-go --image-tag ${{ inputs.images_id }} $TEST_VERSION_FLAG $INCLUDE_OTEL_MODULES -v "${{ inputs.go_version }}"
            echo 'MESSAGE=Update Go version to ${{ inputs.go_version }}' >> $GITHUB_OUTPUT
          fi

      - uses: stefanzweifel/git-auto-commit-action@8621497c8c39c72f3e2a999a26b4ca1b5058a842 # v5.0.1
        id: autocommit
        with:
          commit_message: ${{ steps.update_build_images.outputs.MESSAGE }}
          branch: ${{ inputs.branch }}
          create_branch: true
          # allow empty commits, so that the branch always exists if the workflow succeeds
          commit_options: '--allow-empty'
          skip_dirty_check: true # prevents pushing an empty commit if false
          # the action fetches all branches and tags, in our case the branches we care about are already fetched
          # if they exist, so we can skip the fetch
          skip_fetch: true

      - name: Check if PR exists
        id: check_pr
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          base_branch=${{ github.ref }} # Get the full ref
          base_branch=${base_branch#refs/heads/} # Remove 'refs/heads/' from the ref
          # prs variable contains the number of PRs already created that match head and base branches
          prs=$(gh pr list \
              --repo "$GITHUB_REPOSITORY" \
              --head ${{ inputs.branch }} \
              --base $base_branch \
              --json title \
              --jq 'length')
          if [ $prs -eq 0 ]; then
            echo "CREATE_PR=true" >> $GITHUB_OUTPUT
          fi 

      # Create PR only if there is no pre-existing PR on the branch
      - name: Create PR
        if: ${{ steps.check_pr.outputs.CREATE_PR == 'true' }}
        env:
          TMP_PR_BODY_PATH: /tmp/pr_body
          GH_TOKEN: ${{ github.token }}
          PR_TITLE: "[automated] ${{ steps.update_build_images.outputs.MESSAGE }}"
          PR_LABELS: "go-update,team/agent-shared-components"
        run: |
          # Generate the PR description
          inv -e buildimages.generate-pr-body \
          ${{ steps.current_buildimage_tag.outputs.BUILDIMAGE_TAG }} \
          ${{ inputs.images_id }} \
          ${{ steps.current_go_version.outputs.GO_VERSION }} \
          ${{ inputs.go_version }} \
          ${{ inputs.test_version && '--test-version' || '' }} > $TMP_PR_BODY_PATH

          # Create the PR
          gh pr create \
          --base ${{ github.ref }} \
          --title "$PR_TITLE" \
          --body-file $TMP_PR_BODY_PATH \
          --label "$PR_LABELS" \
          --draft \