cli: added migrate react-router-deps

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

packages/cli/src/commands/index.ts

@@ -180,6 +180,15 @@ export function registerMigrateCommand(program: Command) {
     .action(
       lazy(() => import('./migrate/packageLintConfigs').then(m => m.command)),
     );
+
+  command
+    .command('react-router-deps')
+    .description(
+      'Migrates the react-router dependencies for all packages to be peer dependencies',
+    )
+    .action(
+      lazy(() => import('./migrate/reactRouterDeps').then(m => m.command)),
+    );
 }
 
 export function registerCommands(program: Command) {

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

@@ -0,0 +1,57 @@
+/*
+ * 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 { PackageGraph } from '../../lib/monorepo';
+import { getRoleFromPackage } from '../../lib/role';
+
+const REACT_ROUTER_DEPS = ['react-router', 'react-router-dom'];
+const REACT_ROUTER_RANGE = '6.0.0-beta.0 || ^6.3.0';
+
+export async function command() {
+  const packages = await PackageGraph.listTargetPackages();
+
+  await Promise.all(
+    packages.map(async ({ dir, packageJson }) => {
+      const role = getRoleFromPackage(packageJson);
+      if (role === 'frontend') {
+        console.log(`Skipping ${packageJson.name}`);
+        return;
+      }
+
+      let changed = false;
+      if (packageJson.dependencies) {
+        for (const key of Object.keys(packageJson.dependencies)) {
+          if (REACT_ROUTER_DEPS.includes(key)) {
+            delete packageJson.dependencies[key];
+            const peerDeps = (packageJson.peerDependencies =
+              packageJson.peerDependencies ?? {});
+            peerDeps[key] = REACT_ROUTER_RANGE;
+            changed = true;
+          }
+        }
+      }
+
+      if (changed) {
+        console.log(`Updating dependencies for ${packageJson.name}`);
+        await fs.writeJson(resolvePath(dir, 'package.json'), packageJson, {
+          spaces: 2,
+        });
+      }
+    }),
+  );
+}