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path: root/.github/workflows/comment.yml
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name: comment

on:
  workflow_run:
    workflows: [build]
    types: [completed]

jobs:
  pr_comment:
    if: github.event.workflow_run.event == 'pull_request' &&
        github.event.workflow_run.conclusion == 'success'
    runs-on: ubuntu-latest
    steps:
      - env:
          GH_REPO: ${{ github.repository }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          pr=$(gh pr list --state open --json headRefOid,number \
            --jq '.[] | select(.headRefOid == "${{ github.event.workflow_run.head_sha }}") | .number')
          if [ -z "$pr" ]; then
            echo "No matching pull request found"
            exit 1
          fi

          artifacts=$(gh api repos/{owner}/{repo}/actions/runs/${{ github.event.workflow_run.id }}/artifacts --jq '.artifacts')
          if [ "$(echo "$artifacts" | jq 'length')" -eq 0 ]; then
            echo "No artifacts found"
            exit 0
          fi

          body=$(echo "$artifacts" | jq -r '
            def link: "https://nightly.link/${{ github.repository }}/actions/artifacts/\(.id).zip";
            def entry: "* [\(.name)](\(link))";
            "Download the artifacts for this pull request:\n<details><summary>Windows</summary>\n\n" +
            (sort_by(.name) | map(select(.name | test("w64|msvc")) | entry) | join("\n")) +
            "\n</details>\n<details><summary>macOS</summary>\n\n" +
            (sort_by(.name) | map(select(.name | test("macos")) | entry) | join("\n")) +
            "\n</details>"
          ')

          comment_id=$(gh issue view $pr --json comments \
            --jq '.comments[] | select(.author.login == "github-actions") | .id')
          if [ -n "$comment_id" ]; then
            edit=--edit-last
          fi
          gh pr comment $pr --body "$body" $edit