lint-shared-workflows.yaml

on:
  push:
    branches:
      - "main"

  pull_request:
  merge_group:

permissions:
  contents: read
  actions: write

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7

      - name: Lint with Prettier
        uses: creyD/prettier_action@31355f8eef017f8aeba2e0bc09d8502b13dbbad1 # v4.3
        with:
          dry: true
          prettier_options: "--check ."

      # Lint .github/workflows/*
      - name: Lint workflow files
        uses: raven-actions/actionlint@01fce4f43a270a612932cb1c64d40505a029f821 # v2.0.0

  # A separate job so we can run in the `yq` container
  lint-action-yaml:
    runs-on: ubuntu-latest

    container:
      image: mikefarah/yq:4.43.1@sha256:a7df369b3129dc6e1343b86e5e2f5bdee0853631b5de8221deaffd59358237ee
      # https://github.com/actions/checkout/issues/956
      options: --user root

    steps:
      - name: Checkout
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7

      - name: Install dependencies
        run: |
          # tar is needed to save/restore the schema cache
          apk add --no-cache curl github-cli tar

      - name: Restore github-action.json schema
        id: restore-schema
        uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
        with:
          path: |
            github-action.json
            github-action.json-etag
          key: github-action-schema
          # Doesn't matter if we save/restore the schema from different OSes
          enableCrossOsArchive: true

      - name: Download github-action.json schema
        id: download-schema
        # Download failures are non-fatal if we have a cache hit, because we can
        # use the cached schema
        continue-on-error: ${{ steps.restore-schema.outputs.cache-hit == 'true' }}
        run: |
          response_code=$(curl \
            --write-out '%{response_code}' \
            --verbose \
            --retry 5 \
            --remote-time \
            --remote-name \
            --time-cond github-action.json \
            --etag-save github-action.json-etag \
            --etag-compare github-action.json-etag \
            https://json.schemastore.org/github-action.json);

          curl_exit_code="${?}";

          if [[ "${curl_exit_code}" -ne 0 ]]; then
            exit "${curl_exit_code}";
          fi

          # If the schema has changed (200 vs. 304 if it's not changed), we need
          # to update the cache.
          echo "schema-changed=$([ "${response_code}" -eq 200 ] && echo true || echo false)" >> "${GITHUB_OUTPUT}"

      # Caches can't be overwritten, so we need to delete the previous cache if
      # the schema has changed
      - name: Delete Previous Cache
        if: steps.restore-schema.outputs.cache-hit == 'true' && steps.download-schema.outputs.schema-changed == 'true'
        run: |
          gh extension install actions/gh-actions-cache
          gh actions-cache delete --repo "${{ github.repository }}" "github-action-schema" --confirm
        env:
          GH_TOKEN: ${{ github.token }}

      - name: Save github-action.json schema to cache
        uses: actions/cache/save@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
        if: steps.download-schema.outputs.schema-changed == 'true'
        with:
          path: |
            github-action.json
            github-action.json-etag
          key: github-action-schema
          # Doesn't matter if we save/restore the schema from different OSes
          enableCrossOsArchive: true

      - name: Convert action YAMLS to JSON
        id: convert-action-yaml-to-json
        run: |
          set -ex

          find . -name 'action.yaml' -o -name 'action.yml' | while read -r file; do
            JSON_FILE="${file%.*}.json"

            yq eval -o=j "$file" > "${JSON_FILE}"

            # Save converted filenames to a file
            echo "${JSON_FILE}" >> converted-files.txt
          done

          echo "Converted: $(tr '\n' ' ' < converted-files.txt)"

          # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#example-of-a-multiline-string
          {
            echo 'converted-files<<EOF'
            cat converted-files.txt
            echo 'EOF'
          } >> "${GITHUB_OUTPUT}"

      - name: Validate action definitions
        uses: ScratchAddons/validate-json-action@8f71e0683221310e32661c1b1634399858bde75f
        with:
          schema: github-action.json
          jsons: ${{ steps.convert-action-yaml-to-json.outputs.converted-files }}