changie-gen.yaml

name: Changie Gen

on:
  pull_request:
    # catch when the PR is opened with the label or when the label is added
    types: [labeled]

permissions:
  contents: write
  pull-requests: read

jobs:
  generate-changelog:
    if: contains(github.event.pull_request.labels.*.name, 'dependencies')
    env:
      MAIN_BRANCH: ${{ github.event.workflow_run.pull_requests[0].base.ref }}
      PR_BRANCH: ${{ github.event.workflow_run.pull_requests[0].head.ref }}
    runs-on: ubuntu-latest
    # NOTE: "github.event.workflow_run.conclusion" check needed within "steps"
    steps:
      - name: Checkout branch that Dependabot labeled
        if: github.event.workflow_run.conclusion == 'success'
        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
        with:
          ref: ${{ env.PR_BRANCH }}
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Check if changelog file exists already
        if: github.event.workflow_run.conclusion == 'success'
        shell: bash
        id: changelog_check
        run: |
          git fetch origin ${{ env.MAIN_BRANCH }}
          if [[ -n $(git diff --name-only main -- .changes/unreleased/*.yaml) ]]; then
            echo "exists=true" >> $GITHUB_OUTPUT
            echo "Changelog already exists for this PR, skip creating a new one"
          else
            echo "exists=false" >> $GITHUB_OUTPUT
            echo "No changelog exists for this PR, creating a new one"
          fi

      - name: Setup Go
        if: >-
          github.event.workflow_run.conclusion == 'success' &&
          steps.changelog_check.outputs.exists == 'false'
        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
        with:
          go-version-file: src/go.mod

      - name: Create changie log
        if: >-
          github.event.workflow_run.conclusion == 'success' &&
          steps.changelog_check.outputs.exists == 'false'
        env:
          PR_TITLE: ${{ github.event.workflow_run.display_title }}
        shell: bash
        run: |
          CHANGIE=$(cd src && go tool -n changie)
          "$CHANGIE" new --kind Dependency --body "$PR_TITLE"

      - name: Commit & Push changes
        if: >-
          github.event.workflow_run.conclusion == 'success' &&
          steps.changelog_check.outputs.exists == 'false'
        shell: bash
        run: |
          git config user.name "OpsLevel Bots"
          git config user.email "bots@opslevel.com"
          git pull
          git add .
          git commit -m "Add automated changelog yaml from template"
          git push