coverage.yml

name: Coverage

on:
  push:
    branches: [main]

concurrency:
  group: coverage-${{ github.ref }}
  cancel-in-progress: true

permissions: {}

env:
  CARGO_TERM_COLOR: always

jobs:
  coverage:
    name: Coverage
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          persist-credentials: false

      - uses: dtolnay/rust-toolchain@4be7066ada62dd38de10e7b70166bc74ed198c30
        with:
          components: llvm-tools-preview

      - uses: Swatinem/rust-cache@e18b497796c12c097a38f9edb9d0641fb99eee32 # v2

      - uses: taiki-e/install-action@43aecc8d72668fbcfe75c31400bc4f890f1c5853 # cargo-llvm-cov
        with:
          tool: cargo-llvm-cov

      - name: Setup Node.js
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 22

      - name: Enable Corepack
        run: corepack enable

      - name: Install JS dependencies
        run: corepack pnpm install --ignore-scripts --frozen-lockfile

      - name: Install wasm-pack
        uses: taiki-e/install-action@43aecc8d72668fbcfe75c31400bc4f890f1c5853 # v2.83.2
        with:
          tool: wasm-pack@0.13.1

      # Rust coverage (lcov)
      - name: Rust coverage
        run: |
          mkdir -p coverage
          cargo llvm-cov --workspace --lcov --output-path coverage/rust.lcov

      # Build NAPI packages for JS tests
      - name: Build NAPI packages
        run: corepack pnpm run build:test-artifacts:napi

      # Build WASM packages for JS tests
      - name: Build WASM packages
        run: |
          corepack pnpm --filter @srcmap/sourcemap-wasm build
          corepack pnpm --filter @srcmap/generator-wasm build
          corepack pnpm --filter @srcmap/remapping-wasm build
          corepack pnpm --filter @srcmap/symbolicate-wasm build:all

      # JS coverage (lcov)
      - name: JS coverage
        run: corepack pnpm run coverage:js

      # Compute merged coverage percentage from all lcov files
      - name: Compute coverage
        run: |
          COVERAGE=$(awk -F: '
            /^LF:/ { total += $2 }
            /^LH:/ { hit += $2 }
            END { if (total > 0) printf "%.1f", (hit/total)*100; else print "0" }
          ' coverage/rust.lcov coverage/js-lcov.info)
          echo "COVERAGE=$COVERAGE" >> "$GITHUB_ENV"
          echo "Total coverage: $COVERAGE%"

          RUST_COV=$(awk -F: '
            /^LF:/ { total += $2 }
            /^LH:/ { hit += $2 }
            END { if (total > 0) printf "%.1f", (hit/total)*100; else print "0" }
          ' coverage/rust.lcov)
          echo "RUST_COVERAGE=$RUST_COV" >> "$GITHUB_ENV"
          echo "Rust coverage: $RUST_COV%"

      # Choose badge color based on coverage percentage
      - name: Compute badge color
        run: |
          color_for() {
            local cov=$1
            local int=${cov%.*}
            if [ "$int" -ge 90 ]; then echo "brightgreen"
            elif [ "$int" -ge 80 ]; then echo "green"
            elif [ "$int" -ge 70 ]; then echo "yellowgreen"
            elif [ "$int" -ge 60 ]; then echo "yellow"
            elif [ "$int" -ge 50 ]; then echo "orange"
            else echo "red"
            fi
          }
          echo "BADGE_COLOR=$(color_for "$COVERAGE")" >> "$GITHUB_ENV"
          echo "RUST_BADGE_COLOR=$(color_for "$RUST_COVERAGE")" >> "$GITHUB_ENV"

      # Update badges branch
      - name: Update coverage badges
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

          if ! git ls-remote --heads origin badges | grep -q badges; then
            git checkout --orphan badges
            git rm -rf . 2>/dev/null || true
            echo "{}" > coverage.json
            echo "{}" > rust-coverage.json
            git add coverage.json rust-coverage.json
            git commit -m "chore: init badges branch"
            git push "https://x-access-token:${GH_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" badges
            git checkout main
          fi

          git fetch origin badges
          git worktree add /tmp/srcmap-badges --detach origin/badges
          cd /tmp/srcmap-badges
          git checkout -B badges origin/badges

          echo "{\"schemaVersion\":1,\"label\":\"coverage\",\"message\":\"${COVERAGE}%\",\"color\":\"${BADGE_COLOR}\"}" > coverage.json
          echo "{\"schemaVersion\":1,\"label\":\"rust coverage\",\"message\":\"${RUST_COVERAGE}%\",\"color\":\"${RUST_BADGE_COLOR}\"}" > rust-coverage.json

          git add coverage.json rust-coverage.json
          git diff --cached --quiet || git commit -m "chore: update coverage badges to ${COVERAGE}%"
          git push "https://x-access-token:${GH_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" badges

          cd "$GITHUB_WORKSPACE"
          git worktree remove /tmp/srcmap-badges