# Adapted from create-t3-app.
name: Write Prerelease comment

on:
  workflow_run:
    workflows: ["Release"]
    types:
      - completed

jobs:
  comment:
    if: |
      github.repository_owner == 'shadcn-ui' &&
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'success'
    runs-on: ubuntu-latest
    name: Write comment to the PR
    steps:
      # Stable pushes and no-changeset runs upload no artifact, so a missing
      # download is expected — gate the rest of the job on it succeeding.
      - name: Download prerelease info
        id: download
        continue-on-error: true
        uses: actions/download-artifact@v4
        with:
          name: prerelease-info
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Build comment
        id: info
        if: steps.download.outcome == 'success'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require("fs");
            const info = JSON.parse(fs.readFileSync("prerelease-info.json", "utf8"));

            if (!info.packages || info.packages.length === 0) {
              core.info("No prerelease packages to comment.");
              return;
            }

            const installs = info.packages
              .map((p) => `pnpm dlx ${p.name}@${p.version}`)
              .join("\n");
            const links = info.packages
              .map(
                (p) =>
                  `- [${p.name}@${p.version}](https://www.npmjs.com/package/${p.name}/v/${p.version})`
              )
              .join("\n");

            const body = [
              `A new ${info.channel} prerelease is available for testing:`,
              "",
              "```sh",
              installs,
              "```",
              "",
              links,
            ].join("\n");

            core.setOutput("pr", info.pr);
            core.setOutput("channel", info.channel);
            core.setOutput("body", body);

      - name: Comment on PR
        if: steps.info.outputs.body
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          number: ${{ steps.info.outputs.pr }}
          message: ${{ steps.info.outputs.body }}

      - name: Remove the prerelease label once published
        if: steps.info.outputs.pr
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            try {
              await github.rest.issues.removeLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: Number("${{ steps.info.outputs.pr }}"),
                name: `release: ${{ steps.info.outputs.channel }}`,
              });
            } catch (error) {
              if (error.status !== 404) {
                throw error;
              }

              core.info("The prerelease label was already removed.");
            }