prepare-release.yml

name: Create Release PR

on:
  push:
    branches: [dev]

permissions: {}

jobs:
  prepare-release:
    if: "!contains(github.event.head_commit.message, 'chore: prepare release')"
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Generate bot token
        id: generate-token
        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.APP_PRIVATE_KEY }}

      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0
          persist-credentials: true
          token: ${{ steps.generate-token.outputs.token }}

      - uses: fregante/setup-git-user@024bc0b8e177d7e77203b48dab6fb45666854b35 # v2.0.2

      - uses: knope-dev/action@19617851f9f13ab2f27a05989c55efb18aca3675 # v2.1.2
        with:
          version: 0.22.3

      - name: Prepare Release
        run: knope prepare-release --verbose
        env:
          GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}

      - name: Enrich changelog and update release PR
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.generate-token.outputs.token }}
          script: |
            const fs = require("fs");
            const { owner, repo } = context.repo;

            async function resolveHash(hash) {
              try {
                const prs = await github.rest.repos.listPullRequestsAssociatedWithCommit({
                  owner, repo, commit_sha: hash,
                });
                const pr = prs.data[0];
                return pr
                  ? `([#${pr.number}](${pr.html_url}) by @${pr.user.login})`
                  : `(\`${hash}\`)`;
              } catch {
                return `(\`${hash}\`)`;
              }
            }

            async function enrichText(text) {
              const marker = /<!-- commit:([0-9a-f]+) -->/g;
              const hashes = [...new Set([...text.matchAll(marker)].map(m => m[1]))];
              for (const hash of hashes) {
                text = text.replaceAll(`<!-- commit:${hash} -->`, await resolveHash(hash));
              }
              return text;
            }

            const changelog = "CHANGELOG.md";
            if (fs.existsSync(changelog)) {
              const enriched = await enrichText(fs.readFileSync(changelog, "utf8"));
              fs.writeFileSync(changelog, enriched);
            }

            const prs = await github.rest.pulls.list({
              owner, repo,
              head: `${owner}:release`,
              state: "open",
            });

            if (prs.data.length === 0) {
              core.warning("No open PR found for the release branch.");
              return;
            }

            const pr = prs.data[0];

            const label = "internal";
            try {
              await github.rest.issues.getLabel({ owner, repo, name: label });
            } catch (e) {
              if (e.status === 404) {
                await github.rest.issues.createLabel({ owner, repo, name: label, color: "e4e669" });
              } else {
                throw e;
              }
            }

            await Promise.all([
              github.rest.pulls.update({
                owner, repo,
                pull_number: pr.number,
                body: await enrichText(pr.body ?? ""),
              }),
              github.rest.issues.addLabels({
                owner, repo,
                issue_number: pr.number,
                labels: [label],
              }),
            ]);

      - name: Amend release commit with enriched changelog
        shell: bash
        run: |
          if [[ "$(git rev-parse --abbrev-ref HEAD)" != "release" ]]; then
            echo "Not on release branch — skipping amend."
            exit 1
          fi

          if git diff --cached --name-only | grep -q "CHANGELOG.md"; then
            git add CHANGELOG.md
            git commit --amend --no-edit
          elif git diff --name-only HEAD | grep -q "CHANGELOG.md"; then
            git add CHANGELOG.md
            git commit --amend --no-edit
          fi

      - name: Push release branch
        shell: bash
        run: git push --force --set-upstream origin release