changesets-ci-comment.yml

name: Changesets CI Comment

# NOTE: This workflow run indirection is used to securely comment on PRs when
# changeset CI runs are completed.
on:
  workflow_run:
    workflows: ["Changesets CI"]
    types:
      - completed

jobs:
  upload:
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'success'
    steps:
      - name: Get workflow run information
        uses: potiuk/get-workflow-origin@v1_1
        id: source-run-info
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          sourceRunId: ${{ github.event.workflow_run.id }}

      - name: "Download artifact"
        uses: actions/github-script@v6
        id: get-artifact
        with:
          result-encoding: string
          script: |
            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: context.payload.workflow_run.id,
            });

            let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "missing-changeset"
            })[0];

            if (!matchArtifact) {
              return 'false';
            }

            return 'true';

      - name: Comment PR
        uses: thollander/actions-comment-pull-request@v1
        if: steps.get-artifact.outputs.result == 'true'
        with:
          pr_number: ${{ steps.source-run-info.outputs.pullRequestNumber }}
          comment_includes: "⚠️ 🦋 **Changesets Warning:**"
          message: |
            ⚠️ 🦋 **Changesets Warning:** This PR has changes to public npm packages, but does not contain a changeset. You can create a changeset easily by running `pnpm changeset`, and following the prompts. If your change does not need a changeset (e.g. a documentation-only change), you can ignore this message. This warning will be removed when a changeset is added to this pull request.

            [Learn more about Changesets](https://github.com/changesets/changesets).
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Remove outdated comments
        uses: actions/github-script@v6
        if: steps.get-artifact.outputs.result == 'false'
        env:
          ISSUE_NUMBER: ${{ steps.source-run-info.outputs.pullRequestNumber }}
        with:
          script: |
            const resp = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: process.env.ISSUE_NUMBER
            });

            const comments = resp.data.filter(it => it.body.startsWith('⚠️ 🦋 **Changesets Warning:**'));

            for (const comment of comments) {
              console.log(
                `Removing issue ${comment.issue_url}`
              );

              await github.rest.issues.deleteComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: comment.id
              });
            }