name: Test

on:
  pull_request:
  push:
    branches:
      - main

env:
  CARGO_TERM_COLOR: always

jobs:
  mdbook:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Rust cache
        uses: ./.github/workflows/setup-rust-cache

      - name: Install mdbook
        uses: ./.github/workflows/install-mdbook

      - name: Test code snippets
        run: mdbook test

  cargo:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Rust cache
        uses: ./.github/workflows/setup-rust-cache

      - name: Build Rust code
        run: cargo build

      - name: Test Rust code
        run: cargo test

  i18n-helpers:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Rust cache
        uses: ./.github/workflows/setup-rust-cache

      - name: Install Gettext
        run: sudo apt install gettext

      - name: Install mdbook
        uses: ./.github/workflows/install-mdbook

      - name: Generate po/messages.pot
        run: mdbook build -d po
        env:
          MDBOOK_OUTPUT: '{"xgettext": {"pot-file": "messages.pot"}}'

      - name: Test messages.pot
        run: msgfmt --statistics -o /dev/null po/messages.pot

      - name: Expand includes without translation
        run: mdbook build -d expanded
        env:
          MDBOOK_OUTPUT: '{"markdown": {}}'

      - name: Expand includes with no-op translation
        run: mdbook build -d no-op
        env:
          MDBOOK_OUTPUT: '{"markdown": {}}'
          MDBOOK_PREPROCESSOR__GETTEXT__PO_FILE: po/messages.pot

      - name: Compare no translation to no-op translation
        run: diff --color=always --unified --recursive expanded no-op

  find-translations:
    runs-on: ubuntu-latest
    outputs:
      languages: ${{ steps.find-translations.outputs.languages }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Find translations
        id: find-translations
        shell: python
        run: |
          import os, json, pathlib
          languages = [p.stem for p in pathlib.Path("po").iterdir() if p.suffix == ".po"]
          github_output = open(os.environ["GITHUB_OUTPUT"], "a")
          github_output.write("languages=")
          json.dump(sorted(languages), github_output)

  translations:
    runs-on: ubuntu-latest
    needs:
      - find-translations
    strategy:
      matrix:
        language: ${{ fromJSON(needs.find-translations.outputs.languages) }}
    env:
      MDBOOK_BOOK__LANGUAGE: ${{ matrix.language }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Rust cache
        uses: ./.github/workflows/setup-rust-cache

      - name: Install Gettext
        run: sudo apt install gettext

      - name: Install mdbook
        uses: ./.github/workflows/install-mdbook

      - name: Test ${{ matrix.language }} translation
        run: msgfmt --statistics -o /dev/null po/${{ matrix.language }}.po

      - name: Build course with ${{ matrix.language }} translation
        run: mdbook build

      - name: Upload ${{ matrix.language }} translation
        uses: actions/upload-artifact@v3
        with:
          name: comprehensive-rust-${{ matrix.language }}
          path: book/

      - name: Test code snippets with ${{ matrix.language }} translation
        run: mdbook test