# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-go-dependencies-task.md
name: Check Go Dependencies

env:
  # See: https://github.com/actions/setup-go/tree/v3#readme
  GO_VERSION: "1.16"

# See: https://docs.github.com/actions/using-workflows/events-that-trigger-workflows
on:
  create:
  push:
    paths:
      - ".github/workflows/check-go-dependencies-task.ya?ml"
      - ".licenses/**"
      - ".licensed.json"
      - ".licensed.ya?ml"
      - "Taskfile.ya?ml"
      - "**/.gitmodules"
      - "**/go.mod"
      - "**/go.sum"
  pull_request:
    paths:
      - ".github/workflows/check-go-dependencies-task.ya?ml"
      - ".licenses/**"
      - ".licensed.json"
      - ".licensed.ya?ml"
      - "Taskfile.ya?ml"
      - "**/.gitmodules"
      - "**/go.mod"
      - "**/go.sum"
  schedule:
    # Run periodically to catch breakage caused by external changes.
    - cron: "0 8 * * WED"
  workflow_dispatch:
  repository_dispatch:

jobs:
  run-determination:
    runs-on: ubuntu-latest
    outputs:
      result: ${{ steps.determination.outputs.result }}
    steps:
      - name: Determine if the rest of the workflow should run
        id: determination
        run: |
          RELEASE_BRANCH_REGEX="refs/heads/[0-9]+.[0-9]+.x"
          # The `create` event trigger doesn't support `branches` filters, so it's necessary to use Bash instead.
          if [[
            "${{ github.event_name }}" != "create" ||
            "${{ github.ref }}" =~ $RELEASE_BRANCH_REGEX
          ]]; then
            # Run the other jobs.
            RESULT="true"
          else
            # There is no need to run the other jobs.
            RESULT="false"
          fi

          echo "::set-output name=result::$RESULT"

  check-cache:
    needs: run-determination
    if: needs.run-determination.outputs.result == 'true'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          submodules: recursive

      - name: Install licensed
        uses: jonabc/setup-licensed@v1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          version: 3.x

      - name: Install Go
        uses: actions/setup-go@v3
        with:
          go-version: ${{ env.GO_VERSION }}

      - name: Install Task
        uses: arduino/setup-task@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          version: 3.x

      - name: Update dependencies license metadata cache
        run: task --silent general:cache-dep-licenses

      - name: Check for outdated cache
        id: diff
        run: |
          git add .
          if ! git diff --cached --color --exit-code; then
            echo
            echo "::error::Dependency license metadata out of sync. See: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-go-dependencies-task.md#metadata-cache"
            exit 1
          fi

      # Some might find it convenient to have CI generate the cache rather than setting up for it locally
      - name: Upload cache to workflow artifact
        if: failure() && steps.diff.outcome == 'failure'
        uses: actions/upload-artifact@v3
        with:
          if-no-files-found: error
          name: dep-licenses-cache
          path: .licenses/

  check-deps:
    needs: run-determination
    if: needs.run-determination.outputs.result == 'true'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          submodules: recursive

      - name: Install licensed
        uses: jonabc/setup-licensed@v1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          version: 3.x

      - name: Install Go
        uses: actions/setup-go@v3
        with:
          go-version: ${{ env.GO_VERSION }}

      - name: Install Task
        uses: arduino/setup-task@v1
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          version: 3.x

      - name: Check for dependencies with unapproved licenses
        run: task --silent general:check-dep-licenses
