trigger-auto-merge.yaml

name: Trigger Auto Merge
on:
  push:
    branches:
      - metadata # Trigger only on the 'metadata' branch
    paths:
      - 'executions/**/test-report.html' # File path pattern for test-report.html
jobs:
  setup:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.matrix.outputs.config }}
      metadata_file: ${{ steps.metadata.outputs.metadata_file }}
      trigger_automerge: ${{ steps.matrix.outputs.trigger_automerge }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - uses: dorny/paths-filter@v3
        id: filter
        with:
          # Enable listing of files matching each filter.
          # Paths to files will be available in `${FILTER_NAME}_files` output variable.
          # Paths will be escaped and space-delimited.
          # Output is usable as command-line argument list in Linux shell
          list-files: shell
          # Detect changes against the most recent commit on the same branch before the push
          base: ${{ github.ref }}
          # Only filters added or modified files.
          filters: |
            test_report:
              - added|modified: 'executions/**/test-report.html'

      - name: Print File Paths
        if: ${{ steps.filter.outputs.test_report == 'true' }}
        id: metadata
        env:
          TEST_REPORT_FILE: ${{ steps.filter.outputs.test_report_files }}
        run: |
          echo "metadata_file=${TEST_REPORT_FILE%/*}/metadata.yaml" | tee -a $GITHUB_OUTPUT
          echo "Test Report File: ${{ env.TEST_REPORT_FILE }}"

      - name: Generate Matrix Config
        if: ${{ steps.filter.outputs.test_report == 'true' }}
        id: matrix
        run: |
            test_result=$(yq -o json ${{ steps.metadata.outputs.metadata_file }} | jq -r '.metadata.test_result')
            test_result=$(echo "$test_result" | tr '[:upper:]' '[:lower:]')
            echo "test_result=$test_result"
            
            if [ "$test_result" == "pass" ]; then
                echo "Tests have passed successfully. Auto-merge will now be triggered!"
                echo "trigger_automerge=yes" >> $GITHUB_OUTPUT
            else
                echo "Tests have failed. Auto-merge will be skipped!"
                echo "trigger_automerge=no" >> $GITHUB_OUTPUT
            fi

            config=$(yq -o json ${{ steps.metadata.outputs.metadata_file }} | jq -c '.metadata.git')
            echo "${config}" | jq '.'

            length=$(echo $config | jq '. | length')
            echo "$length repo(s) will be synced by this workflow"
            
            if [[ $length -eq 0 ]]
            then 
                echo "No valid repos available for auto-merge."
                exit 1
            fi
            
            echo "config=$config" >> $GITHUB_OUTPUT

  sync:
    name: sync (${{ matrix.mapping.name }})
    needs: [setup]
    if: ${{ needs.setup.outputs.trigger_automerge == 'yes' }}
    runs-on: ubuntu-latest
    outputs:
      metadata_file: ${{ needs.setup.outputs.metadata_file }}
    strategy:
      fail-fast: false
      matrix:
        mapping: ${{ fromJSON(needs.setup.outputs.matrix) }}
    steps:
      - name: Print matrix config
        run: |
            echo ${{ matrix.mapping.ignore_files }}
            echo ${{ join(matrix.mapping.ignore_files, ',') }}
            echo ${{ needs.setup.outputs.matrix }}

      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          ref: main


      - uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.PRIVATE_KEY }}
          owner: ${{ github.repository_owner }}

      - name: Get GitHub App User ID
        id: get-user-id
        run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}

      - name: configure git committer string
        run: |-
          git config --global user.name '${{ steps.app-token.outputs.app-slug }}[bot]'
          git config --global user.email '${{ steps.get-user-id.outputs.user-id }}+${{ steps.app-token.outputs.app-slug }}[bot]@users.noreply.github.com>'

      - name: Sync Repository
        run: ./scripts/sync-git-repos.sh
        env:
            UPSTREAM_REPO: "${{ matrix.mapping.src.url }}"
            UPSTREAM_BRANCH: "${{ matrix.mapping.src.branch }}"
            DOWNSTREAM_REPO: "${{ matrix.mapping.dest.url }}"
            DOWNSTREAM_BRANCH: "${{ matrix.mapping.dest.branch }}"
            IGNORE_FILES: "${{ join(matrix.mapping.ignore_files, ',') }}"
            GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
            MERGE_ARGS: "--no-edit"
            PUSH_ARGS: ""
            FETCH_ARGS: ""


  update-metadata:
    needs: [sync]
    if: always()  # This ensures the job runs regardless of the sync job's success or failure.
    runs-on: ubuntu-latest
    env:
      METADATA_FILE: ${{ needs.sync.outputs.metadata_file }}
    steps:
      - uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.PRIVATE_KEY }}
          owner: red-hat-data-services
          repositories: Gated-Auto-Merger

      - name: Get GitHub App User ID
        id: get-user-id
        run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}

      - name: configure git committer string
        run: |-
          git config --global user.name '${{ steps.app-token.outputs.app-slug }}'
          git config --global user.email '${{ steps.get-user-id.outputs.user-id }}+${{ steps.app-token.outputs.app-slug }}[bot]@users.noreply.github.com>'

      - uses: actions/checkout@v3
        with:
          repository: red-hat-data-services/Gated-Auto-Merger
          token: ${{ steps.app-token.outputs.token }}
          ref: metadata
          path: gam

      - name: Update Metadata
        working-directory: gam
        run: |
            STATUS=${{ needs.sync.result }}
            WORKFLOW_RUN_URL=${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}

            yq e ".metadata.status = \"$STATUS\" | .metadata.auto_merge_url = \"$WORKFLOW_RUN_URL\"" -i ${{ env.METADATA_FILE }}

      - name: Commit and push changes to metadata branch
        working-directory: gam
        run: |
            COMPONENT=$(cat ${{ env.METADATA_FILE }} | yq '.config.name')
            GAM_EXECUTION_ID=$(cat ${{ env.METADATA_FILE }} | yq '.metadata.execution_id')

            git status
            git add .
            git commit -m "Updating metadata.yaml - ${COMPONENT}/${GAM_EXECUTION_ID}"
            git push origin metadata