ci: Setup a semi-automated release process (no-changelog) (#5504)

* ci: Setup a semi-automated release process (no-changelog)

* create tag/release before deleting the temporary branch

.github/scripts/bump-versions.mjs

@@ -0,0 +1,52 @@
+import semver from 'semver';
+import { writeFile, readFile } from 'fs/promises';
+import { resolve } from 'path';
+import child_process from 'child_process';
+import { promisify } from 'util';
+import assert from 'assert';
+
+const exec = promisify(child_process.exec);
+
+const rootDir = process.cwd();
+const releaseType = process.env.RELEASE_TYPE;
+assert.match(releaseType, /^(patch|minor|major)$/, 'Invalid RELEASE_TYPE');
+
+// TODO: if releaseType is `auto` determine release type based on the changelog
+
+const lastTag = (await exec('git describe --tags --match "n8n@*" --abbrev=0')).stdout.trim();
+const packages = JSON.parse((await exec('pnpm ls -r --only-projects --json')).stdout);
+
+const packageMap = {};
+for (let { name, path, version, private: isPrivate, dependencies } of packages) {
+	if (isPrivate && path !== rootDir) continue;
+	if (path === rootDir) name = 'monorepo-root';
+
+	const isDirty = await exec(`git diff --quiet HEAD ${lastTag} -- ${path}`)
+		.then(() => false)
+		.catch((error) => true);
+
+	packageMap[name] = { path, isDirty, version };
+}
+
+assert.ok(packageMap['n8n'].isDirty, 'No changes found since the last release');
+
+// Keep the monorepo version up to date with the released version
+packageMap['monorepo-root'].version = packageMap['n8n'].version;
+
+for (const packageName in packageMap) {
+	const { path, version, isDirty } = packageMap[packageName];
+	const packageFile = resolve(path, 'package.json');
+	const packageJson = JSON.parse(await readFile(packageFile, 'utf-8'));
+
+	packageJson.version = packageMap[packageName].nextVersion =
+		isDirty ||
+		Object.keys(packageJson.dependencies).some(
+			(dependencyName) => packageMap[dependencyName]?.isDirty,
+		)
+			? semver.inc(version, releaseType)
+			: version;
+
+	await writeFile(packageFile, JSON.stringify(packageJson, null, 2) + '\n');
+}
+
+console.log(packageMap['n8n'].nextVersion);

.github/scripts/package.json

@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "semver": "^7.3.8",
+    "conventional-changelog-cli": "^2.2.2"
+  }
+}

.github/workflows/check-pr-title.yml

@@ -6,6 +6,8 @@ on:
       - opened
       - edited
       - synchronize
+    branches:
+      - '!release/*'
 
 jobs:
   check-pr-title:

.github/workflows/release-create-pr.yml

@@ -0,0 +1,69 @@
+name: 'Release: Create Pull Request'
+
+on:
+  workflow_dispatch:
+    inputs:
+      base-branch:
+        description: 'The branch to create this release PR from.'
+        required: true
+        default: 'master'
+
+      release-type:
+        description: 'A SemVer release type.'
+        required: true
+        type: choice
+        default: 'minor'
+        options:
+          - patch
+          - minor
+
+jobs:
+  create-release-pr:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    timeout-minutes: 5
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.inputs.base-branch }}
+
+      - name: Push the base branch
+        run: |
+          git push -f origin ${{ github.event.inputs.base-branch }}:"release/${{ github.event.inputs.release-type }}"
+
+      - uses: pnpm/action-setup@v2.2.4
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - run: npm install --prefix=.github/scripts --no-package-lock
+
+      - name: Bump package versions
+        run: |
+          echo "NEXT_RELEASE=$(node .github/scripts/bump-versions.mjs)" >> $GITHUB_ENV
+          pnpm i --lockfile-only
+        env:
+          RELEASE_TYPE: ${{ github.event.inputs.release-type }}
+
+      - name: Generate Changelog
+        run: npx conventional-changelog-cli -p angular -i CHANGELOG.md -s -t n8n@
+
+      - name: Push the release branch, and Create the PR
+        uses: peter-evans/create-pull-request@v4
+        with:
+          base: 'release/${{ github.event.inputs.release-type }}'
+          branch: 'release/${{ env.NEXT_RELEASE }}'
+          commit-message: ':rocket: Release ${{ env.NEXT_RELEASE }}'
+          delete-branch: true
+          labels: 'release'
+          title: ':rocket: Release ${{ env.NEXT_RELEASE }}'
+          # 'TODO: add generated changelog to the body. create a script to generate custom changelog'
+          body: ''
+
+      # TODO: post PR link to slack

.github/workflows/release-publish.yml

@@ -0,0 +1,57 @@
+name: 'Release: Publish'
+
+on:
+  pull_request:
+    types:
+      - closed
+    branches:
+      - 'release/patch'
+      - 'release/minor'
+
+jobs:
+  publish-release:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: pnpm/action-setup@v2.2.4
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+          cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
+
+      - name: Build
+        run: pnpm build
+
+      - name: Publish to NPM
+        run: |
+          echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > ~/.npmrc
+          pnpm publish -r --publish-branch ${{github.event.pull_request.base.ref}} --access public
+          echo "RELEASE=$(node -e 'console.log(require("./package.json").version)')" >> $GITHUB_ENV
+
+      - name: Create Release
+        uses: ncipollo/release-action@v1
+        with:
+          commit: ${{github.event.pull_request.base.ref}}
+          tag: 'n8n@${{env.RELEASE}}'
+
+      - name: Merge Release into 'master'
+        run: |
+          git fetch origin
+          git checkout --track origin/master
+          git config user.name github-actions
+          git config user.email github-actions@github.com
+          git merge --ff origin/${{github.event.pull_request.base.ref}}
+          git push origin master
+          git push origin :${{github.event.pull_request.base.ref}}