cli: add migrate:package-role command

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/cli/src/commands/index.ts

@@ -233,6 +233,11 @@ export function registerCommands(program: CommanderStatic) {
     .description('Print configuration schema')
     .action(lazy(() => import('./config/schema').then(m => m.default)));
 
+  program
+    .command('migrate:package-role')
+    .description(`Add package role field to packages that don't have it`)
+    .action(lazy(() => import('./migrate/packageRole').then(m => m.default)));
+
   program
     .command('versions:bump')
     .option(

packages/cli/src/commands/migrate/packageRole.ts

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2020 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import fs from 'fs-extra';
+import { resolve as resolvePath } from 'path';
+import { getPackages } from '@manypkg/get-packages';
+import { paths } from '../../lib/paths';
+import { readPackageRole, detectPackageRole } from '../../lib/role';
+
+export default async () => {
+  const { packages } = await getPackages(paths.targetDir);
+
+  await Promise.all(
+    packages.map(async ({ dir, packageJson: pkg }) => {
+      const { name } = pkg;
+      const existingRole = readPackageRole(pkg);
+      if (existingRole) {
+        return;
+      }
+
+      const detectedRole = detectPackageRole(pkg);
+      if (!detectedRole) {
+        console.error(`No role detected for package ${name}`);
+        return;
+      }
+
+      console.log(`Detected package role of ${name} as ${detectedRole.role}`);
+
+      let newPkg = pkg as any;
+
+      const pkgKeys = Object.keys(pkg);
+      if (pkgKeys.includes('backstage')) {
+        newPkg.backstage = {
+          ...newPkg.backstage,
+          role: detectedRole.role,
+        };
+      } else {
+        // We insert the backstage field after one of these fields, otherwise at the end
+        const index =
+          Math.max(
+            pkgKeys.indexOf('version'),
+            pkgKeys.indexOf('private'),
+            pkgKeys.indexOf('publishConfig'),
+          ) + 1 || pkgKeys.length;
+
+        const pkgEntries = Object.entries(pkg);
+        pkgEntries.splice(index, 0, ['backstage', { role: detectedRole.role }]);
+        newPkg = Object.fromEntries(pkgEntries);
+      }
+
+      await fs.writeJson(resolvePath(dir, 'package.json'), newPkg, {
+        spaces: 2,
+      });
+    }),
+  );
+};