wasm-size.yml

name: Report wasm size
on:
  pull_request:
    paths-ignore:
      - '.github/**'
      - '!.github/workflows/wasm-size.yml'
      - '.buildkite/**'
      - '*.md'
      - 'LICENSE'
      - 'CODEOWNERS'
      - 'renovate.json'

jobs:
  pr-wasm-size:
    name: Get PR module size
    runs-on: ubuntu-latest
    outputs:
      size: ${{ steps.measure.outputs.size }} 
      size_gz: ${{ steps.measure.outputs.size_gz }} 
    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v4
      
      - uses: dtolnay/rust-toolchain@stable

      - name: 'Install wasm-pack'
        run: cargo install wasm-pack
      
      - name: Build and measure PR branch
        id: measure
        run: |
          make build-qe-wasm
          echo "size=$(wc --bytes < query-engine/query-engine-wasm/pkg/query_engine_bg.wasm)" >> $GITHUB_OUTPUT
          echo "size_gz=$(gzip -cn query-engine/query-engine-wasm/pkg/query_engine_bg.wasm | wc --bytes)" >> $GITHUB_OUTPUT

  base-wasm-size:
    name: Get base branch size
    runs-on: ubuntu-latest
    outputs:
      size: ${{ steps.measure.outputs.size }} 
      size_gz: ${{ steps.measure.outputs.size_gz }} 
    steps:
      - name: Checkout base branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.base.sha }}
      
      - uses: dtolnay/rust-toolchain@stable

      - name: 'Install wasm-pack'
        run: cargo install wasm-pack
      
      - name: Build and measure base branch
        id: measure
        run: |
          make build-qe-wasm
          echo "size=$(wc --bytes < query-engine/query-engine-wasm/pkg/query_engine_bg.wasm)" >> $GITHUB_OUTPUT
          echo "size_gz=$(gzip -cn query-engine/query-engine-wasm/pkg/query_engine_bg.wasm | wc --bytes)" >> $GITHUB_OUTPUT
  
  report-diff:
    name: Report module size difference
    runs-on: ubuntu-latest
    needs: 
      - pr-wasm-size 
      - base-wasm-size

    steps:
      - name: Compute difference
        id: compute
        run: |
          base=$(echo "${{ needs.base-wasm-size.outputs.size }}" | numfmt --format '%.3f' --to=iec-i --suffix=B)
          base_gz=$(echo "${{ needs.base-wasm-size.outputs.size_gz }}" | numfmt --format '%.3f' --to=iec-i --suffix=B)
          pr=$(echo "${{ needs.pr-wasm-size.outputs.size }}" | numfmt --format '%.3f' --to=iec-i  --suffix=B)
          pr_gz=$(echo "${{ needs.pr-wasm-size.outputs.size_gz }}" | numfmt --format '%.3f' --to=iec-i --suffix=B)
          
          diff=$(echo "$((${{ needs.pr-wasm-size.outputs.size }} - ${{ needs.base-wasm-size.outputs.size }}))" | numfmt --format '%.3f' --to=iec-i --suffix=B)
          diff_gz=$(echo "$((${{ needs.pr-wasm-size.outputs.size_gz }} - ${{ needs.base-wasm-size.outputs.size_gz }}))" | numfmt --format '%.3f' --to=iec-i --suffix=B)

          echo "base=$base" >> $GITHUB_OUTPUT
          echo "base_gz=$base_gz" >> $GITHUB_OUTPUT

          echo "pr=$pr" >> $GITHUB_OUTPUT
          echo "pr_gz=$pr_gz" >> $GITHUB_OUTPUT

          echo "diff=$diff" >> $GITHUB_OUTPUT
          echo "diff_gz=$diff_gz" >> $GITHUB_OUTPUT

      - name: Find past report comment
        uses: peter-evans/find-comment@v2
        id: findReportComment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          body-includes: '<!-- wasm-size -->'

      - name: Create or update report
        uses: peter-evans/create-or-update-comment@v3
        with:
          comment-id: ${{ steps.findReportComment.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            <!-- wasm-size -->
            ### WASM Size

            |Engine        | This PR                           | Base branch                          | Diff
            |--------------|-----------------------------------|--------------------------------------|------------------------------------
            | WASM         | ${{ steps.compute.outputs.pr}}    |  ${{ steps.compute.outputs.base}}    | ${{ steps.compute.outputs.diff}}
            | WASM (gzip)  | ${{ steps.compute.outputs.pr_gz}} |  ${{ steps.compute.outputs.base_gz}} | ${{ steps.compute.outputs.diff_gz}}
          edit-mode: replace