name: CI

on: ['push', 'pull_request']

jobs:
  ci:
    name: CI
    runs-on: ubuntu-latest
    permissions:
      contents: write # to upload assets to releases
      attestations: write # to upload assets attestation for build provenance
      id-token: write # grant additional permission to attestation action to mint the OIDC token permission

    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - uses: actions/setup-python@v5
      with:
        python-version: '3.12'
        cache: 'pip'

    - uses: actions/setup-node@v4
      with:
        node-version: 'lts/*'
        cache: 'npm'

    - name: Set up PR environment
      if: github.event.number != null
      run: echo "PULL_REQUEST_ID=${{ github.event.number }}" >> $GITHUB_ENV

    - name: Install npm dependencies
      run: npm ci

    - name: Install pip dependencies
      run: pip install -r requirements.txt -r scripts/pdf/requirements.txt -r scripts/test-requirements.txt

    - name: Test
      run: npm test

    - name: Build
      run: bash scripts/build.sh

    - name: Build PDF
      if: github.repository == 'tldr-pages/tldr' && github.ref == 'refs/heads/main'
      working-directory: ./scripts/pdf
      run: bash build-pdf.sh

    - name: Deploy
      if: github.repository == 'tldr-pages/tldr' && github.ref == 'refs/heads/main'
      run: bash scripts/deploy.sh
      env:
        DEPLOY_KEY: ${{ secrets.DEPLOY_KEY }}
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

    - name: Check for generated files
      if: github.repository == 'tldr-pages/tldr' && github.ref == 'refs/heads/main'
      id: check-files
      run: |
        if [[ -n $(find language_archives -name "*.zip" -print -quit) ]]; then
            echo "zip_exists=true" >> $GITHUB_ENV
        else
            echo "zip_exists=false" >> $GITHUB_ENV
        fi

        if [[ -n $(find scripts/pdf -name "*.pdf" -print -quit) ]]; then
            echo "pdf_exists=true" >> $GITHUB_ENV
        else
            echo "pdf_exists=false" >> $GITHUB_ENV
        fi

        if [[ -f tldr.sha256sums ]]; then
            echo "checksums_exist=true" >> $GITHUB_ENV
        else
            echo "checksums_exist=false" >> $GITHUB_ENV
        fi

    - name: Construct subject-path for attest
      if: github.repository == 'tldr-pages/tldr' && github.ref == 'refs/heads/main'
      id: construct-subject-path
      run: |
        subject_path=""
        if [[ ${{ env.zip_exists }} == 'true' ]]; then
          zip_files=$(find language_archives -name '*.zip' -printf '%p,')
          subject_path+="${zip_files::-1}"
        fi
        if [[ ${{ env.pdf_exists }} == 'true' ]]; then
          if [[ -n $subject_path ]]; then subject_path+=","; fi
          pdf_files=$(find scripts/pdf -name '*.pdf' -printf '%p,')
          subject_path+="${pdf_files::-1}"
        fi
        if [[ ${{ env.checksums_exist }} == 'true' ]]; then
          if [[ -n $subject_path ]]; then subject_path+=","; fi
          subject_path+='tldr.sha256sums'
        fi
        echo "subject_path=$subject_path" >> $GITHUB_ENV

    - name: Attest generated files
      if: github.repository == 'tldr-pages/tldr' && github.ref == 'refs/heads/main'
      id: attest
      uses: actions/attest-build-provenance@v2
      continue-on-error: true # prevent failing when no pages are modified
      with:
        subject-path: ${{ env.subject_path }}