name: License Report Workflow

on:
  push:
    branches:
      - main
    paths:
      - "build.gradle"

# cancel in-progress jobs if a new job is triggered
# This is useful to avoid running multiple builds for the same branch if a new commit is pushed
# or a pull request is updated.
# It helps to save resources and time by ensuring that only the latest commit is built and tested
# This is particularly useful for long-running jobs that may take a while to complete.
# The `group` is set to a combination of the workflow name, event name, and branch name.
# This ensures that jobs are grouped by the workflow and branch, allowing for cancellation of
# in-progress jobs when a new commit is pushed to the same branch or a new pull request is opened.
concurrency:
  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref_name || github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  generate-license-report:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
      repository-projects: write # Required for enabling automerge
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
        with:
          egress-policy: audit

      - name: Check out code
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          fetch-depth: 0

      - name: Setup GitHub App Bot
        id: setup-bot
        uses: ./.github/actions/setup-bot
        with:
          app-id: ${{ secrets.GH_APP_ID }}
          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}

      - name: Set up JDK 17
        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
        with:
          java-version: "17"
          distribution: "temurin"

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@4d9f0ba0025fe599b4ebab900eb7f3a1d93ef4c2 # v5.0.0

      - name: Check licenses for compatibility
        run: ./gradlew clean checkLicense
        env:
          DISABLE_ADDITIONAL_FEATURES: false
          STIRLING_PDF_DESKTOP_UI: true

      - name: Upload artifact on failure
        if: failure()
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
        with:
          name: dependencies-without-allowed-license.json
          path: build/reports/dependency-license/dependencies-without-allowed-license.json
          retention-days: 3

      - name: Move and rename license file
        run: |
          mv build/reports/dependency-license/index.json app/core/src/main/resources/static/3rdPartyLicenses.json

      - name: Commit changes
        run: |
          git add app/core/src/main/resources/static/3rdPartyLicenses.json
          git diff --staged --quiet || echo "CHANGES_DETECTED=true" >> $GITHUB_ENV

      - name: Create Pull Request
        id: cpr
        if: env.CHANGES_DETECTED == 'true'
        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
        with:
          token: ${{ steps.setup-bot.outputs.token }}
          commit-message: "Update 3rd Party Licenses"
          committer: ${{ steps.setup-bot.outputs.committer }}
          author: ${{ steps.setup-bot.outputs.committer }}
          signoff: true
          branch: update-3rd-party-licenses
          title: "Update 3rd Party Licenses"
          body: |
            Auto-generated by ${{ steps.setup-bot.outputs.app-slug }}[bot]
          labels: Licenses,github-actions
          draft: false
          delete-branch: true
          sign-commits: true

      - name: Enable Pull Request Automerge
        if: steps.cpr.outputs.pull-request-operation == 'created'
        run: gh pr merge --squash --auto "${{ steps.cpr.outputs.pull-request-number }}"
        env:
          GH_TOKEN: ${{ steps.setup-bot.outputs.token }}
