wasm-size.yml

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

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

jobs:
  pr-wasm-size:
    name: calculate module size (pr)
    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: cachix/install-nix-action@v24

      - name: Build and measure PR branch
        id: measure
        run: |
          nix build -L .#query-engine-wasm .#query-engine-wasm-gz

          echo "size=$(wc --bytes < ./result/query_engine_bg.wasm)" >> $GITHUB_OUTPUT
          echo "size_gz=$(wc --bytes < ./result-1/query_engine_bg.wasm.gz)" >> $GITHUB_OUTPUT

  base-wasm-size:
    name: calculate module size (main)
    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: cachix/install-nix-action@v24

      - name: Build and measure base branch
        id: measure
        run: |
          nix build -L .#query-engine-wasm .#query-engine-wasm-gz

          echo "size=$(wc --bytes < ./result/query_engine_bg.wasm)" >> $GITHUB_OUTPUT
          echo "size_gz=$(wc --bytes < ./result-1/query_engine_bg.wasm.gz)" >> $GITHUB_OUTPUT

  report-diff:
    name: report module size
    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