release-on-version-change.yml

name: release on version change

on:
  push:
    branches:
      - main
    paths:
      - package.json
  workflow_dispatch:

permissions:
  id-token: write
  contents: write
  pull-requests: write
  issues: write
  actions: read
  checks: read

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: detect version change
        id: version
        uses: actions/github-script@v8
        with:
          script: |
            const fs = require("node:fs");
            const childProcess = require("node:child_process");
            const packageJson = JSON.parse(fs.readFileSync("package.json", "utf8"));
            const current = String(packageJson.version ?? "");
            let previous = "";

            try {
              const previousPackageJson = childProcess.execSync("git show HEAD^:package.json", {
                encoding: "utf8",
              });
              const previousPackage = JSON.parse(previousPackageJson);
              previous = String(previousPackage.version ?? "");
            } catch {}

            const changed = previous === "" || current !== previous;
            core.setOutput("current", current);
            core.setOutput("previous", previous);
            core.setOutput("changed", String(changed));
            core.info(`current=${current} previous=${previous} changed=${changed}`);

      - name: check for existing release tag
        id: release_exists
        if: steps.version.outputs.changed == 'true'
        uses: actions/github-script@v8
        with:
          script: |
            const tag = "v${{ steps.version.outputs.current }}";
            let exists = false;
            try {
              await github.rest.repos.getReleaseByTag({
                owner: context.repo.owner,
                repo: context.repo.repo,
                tag,
              });
              exists = true;
            } catch (error) {
              if (error.status !== 404) {
                throw error;
              }
            }
            core.setOutput("exists", String(exists));
            core.info(`tag=${tag} exists=${exists}`);

      - name: generate changelog with pullfrog
        id: changelog
        if: steps.version.outputs.changed == 'true' && steps.release_exists.outputs.exists != 'true'
        uses: pullfrog/pullfrog@main
        with:
          agent: codex
          effort: auto
          timeout: 20m
          prompt: |
            Generate the release changelog markdown for version v${{ steps.version.outputs.current }}.
            Previous version from package.json is "${{ steps.version.outputs.previous }}".

            Requirements:
            - Read git history and summarize notable changes.
            - Keep output concise and factual.
            - Output valid markdown for a GitHub Release body.
            - Include these exact headings:
              ## highlights
              ## changes
            - Do not wrap the output in code fences.
            - call gh_pullfrog/set_output exactly once with the full markdown body.
        env:
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
          CURSOR_API_KEY: ${{ secrets.CURSOR_API_KEY }}
          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
          GROQ_API_KEY: ${{ secrets.GROQ_API_KEY }}
          DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
          OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}

      - name: create GitHub release
        if: steps.version.outputs.changed == 'true' && steps.release_exists.outputs.exists != 'true'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: v${{ steps.version.outputs.current }}
          name: v${{ steps.version.outputs.current }}
          body: ${{ steps.changelog.outputs.result }}