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name: Comparison site

on:
  push:
    branches: [main]
    paths:
      - compare/**
      - src/**
      - Cargo.toml
      - Cargo.lock
      - .github/workflows/compare.yml
  workflow_dispatch:

permissions: {}

# Serialize deploys; don't cancel a deployment already in flight.
concurrency:
  group: pages
  cancel-in-progress: false

env:
  MERGIRAF_VERSION: 0.18.0

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read # checkout.
    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
        with:
          persist-credentials: false
      - name: Build d3j
        run: cargo build --release
      - name: Install mergiraf
        # Compiles from source (a couple of minutes); pinned for
        # reproducible output.
        run: cargo install mergiraf --locked --version "$MERGIRAF_VERSION"
      - name: Generate site
        env:
          D3J: ${{ github.workspace }}/target/release/d3j
        run: ./compare/generate.sh dist
      - uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3
        with:
          path: dist

  deploy:
    needs: build
    runs-on: ubuntu-latest
    permissions:
      pages: write # deploy to Pages.
      id-token: write # OIDC token for the Pages deployment.
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - id: deployment
        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4