ci.yml

name: CI

on:
  pull_request:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  required-files:
    name: All required files are present
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0

      - name: All required files are present
        run: bin/check_required_files_present

  immutability:
    name: No test has been mutated
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0
        with:
          path: "new"

      # Pull Requests
      - name: Checkout the target branch
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0
        with:
          ref: "${{ github.base_ref }}"
          path: "old"

      - name: Check that no test has been mutated
        run: |
          for oldf in old/exercises/*/canonical-data.json; do
            newf=${oldf//old/new}
            ./new/bin/check-immutability.py "$oldf" "$newf"
          done

  schema-validation:
    name: Schema validation
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0

      - name: Setup nodejs
        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
        with:
          node-version: 16
          cache: "yarn"

      - name: Install dependencies
        run: yarn install

      - name: Verify that canonical-data.json files adhere to their json schema
        run: yarn test

      - name: Verify that all UUIDs are indeed unique
        run: |
          duplicate_uuids=$(cat exercises/*/canonical-data.json |
              jq -r '.. |."uuid"? | select(. != null)' |          # select all UUIDs
              sort | uniq -d)                                     # check for repeated UUIDs
          if [ -n "$duplicate_uuids" ]; then
              echo "The following UUIDs are not unique:"
              echo "$duplicate_uuids"
              exit 1
          fi

      - name: Verify that reimplements-values refer to existing UUID
        run: |
          fail=0

          for f in exercises/*/canonical-data.json; do
              # Search for reimplemented test cases
              reimplements=$(jq -r '.. |."reimplements"? | select(. != null)' "$f")

              # Abort early if the exercise doesn't have reimplemented test cases
              [[ -e $reimplements ]] && continue

              uuids=$(jq -r '.. |."uuid"? | select(. != null)' "$f")
              for reimplemented_uuid in $reimplements; do
                  if [[ $uuids != *"$reimplemented_uuid"* ]]; then
                      echo "$f: reimplemented value refers to a test case with UUID $reimplemented_uuid, but the file does not contain any test cases with that UUID."
                      fail=1
                  fi
              done
          done

          exit "$fail"

      - name: Verify that all scenarios are defined in the schema
        run: |
          canonical_data_schema_file="canonical-data.schema.json"
          scenarios_file="SCENARIOS.txt"

          fail=0

          while read -r scenario; do
              jq -e ".definitions.scenario.enum | index(\"$scenario\")" $canonical_data_schema_file > /dev/null

              if [ $? -eq 1 ]; then
                  echo "$canonical_data_schema_file: scenario '$scenario' is missing from the '.definitions.scenario.enum' field."
                  fail=1
              fi
          done < $scenarios_file

          exit "$fail"

      - name: Verify that all keys are in the correct order
        run: ./bin/check_key_order.rb

  markdown-lint:
    name: Lint markdown files
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0

      - name: Lint markdown
        uses: DavidAnson/markdownlint-cli2-action@eb5ca3ab411449c66620fe7f1b3c9e10547144b0 # v18.0.0
        with:
          globs: |
            **/*.md

      - name: Setup nodejs
        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
        with:
          node-version: 16
          cache: "yarn"

      - name: Install dependencies
        run: yarn install

      - name: Verify that markdown files are formatted correctly
        run: |
          yarn format-md && ruby bin/format-admonition-fences.rb
          if ! git diff --quiet --exit-code; then
            echo "please format the files using 'yarn format-md && ruby bin/format-admonition-fences.rb', or apply the following changes:"
            git diff
            exit 1
          fi

  check-links:
    name: Check links
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0

      - name: Check links
        uses: lycheeverse/lychee-action@f81112d0d2814ded911bd23e3beaa9dda9093915 # 2.1.0
        with:
          args: --require-https --user-agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36" --no-progress **/*.md **/*.html **/*.toml **/*.json
          fail: true
        env:
          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

  json-lint:
    name: Lint json files
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.0.0

      - name: Setup nodejs
        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
        with:
          node-version: 16
          cache: "yarn"

      - name: Install dependencies
        run: yarn install

      - name: Verify that json files are formatted correctly
        run: |
          yarn format-json && ruby bin/format-array.rb
          if ! git diff --quiet --exit-code; then
            echo "please format the files with prettier and bin/format-array.rb, or apply the following changes:"
            git diff
            exit 1
          fi