binary-size-comment.yml

name: Binary Size Comment
on:
  workflow_run:
    workflows: ["Binary Size"]
    types: [completed]
permissions:
  pull-requests: write

jobs:
  comment:
    name: Post size report
    if: github.event.workflow_run.event == 'pull_request'
    runs-on: ubuntu-latest
    steps:
    - name: Download results
      uses: actions/download-artifact@v4
      with:
        name: binary-size-result
        run-id: ${{ github.event.workflow_run.id }}
        github-token: ${{ secrets.GITHUB_TOKEN }}
    - name: Parse results
      id: parse
      run: |
        # result.txt has one value per line (with leading whitespace)
        mapfile -t lines < <(sed 's/^[[:space:]]*//' result.txt)
        {
          echo "pr_number=${lines[0]}"
          echo "base_ref=${lines[1]}"
          echo "base_human=${lines[2]}"
          echo "pr_human=${lines[3]}"
          echo "delta_human=${lines[4]}"
          echo "pct=${lines[5]}"
        } >> "$GITHUB_OUTPUT"
    - name: Find existing comment
      uses: peter-evans/find-comment@v3
      id: find-comment
      with:
        issue-number: ${{ steps.parse.outputs.pr_number }}
        comment-author: github-actions[bot]
        body-includes: Binary size report
    - name: Post PR comment
      uses: peter-evans/create-or-update-comment@v4
      with:
        comment-id: ${{ steps.find-comment.outputs.comment-id }}
        issue-number: ${{ steps.parse.outputs.pr_number }}
        edit-mode: replace
        body: |
          ## Binary size report (`bin/amd64/ignition`)

          | | Size |
          |---|---|
          | **Base** (`${{ steps.parse.outputs.base_ref }}`) | ${{ steps.parse.outputs.base_human }} |
          | **PR** (#${{ steps.parse.outputs.pr_number }}) | ${{ steps.parse.outputs.pr_human }} |
          | **Delta** | ${{ steps.parse.outputs.delta_human }} (${{ steps.parse.outputs.pct }}) |