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"
+  }
+}