cli: added new repo clean command

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

.changeset/smart-squids-change.md

@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Added a new `backstage-cli repo clean` command that cleans the repo root and runs the clean script in all packages.

packages/cli/cli-report.md

@@ -415,6 +415,7 @@ Options:
 Commands:
   build [options]
   lint [options]
+  clean
   help [command]
 ```
 
@@ -429,6 +430,15 @@ Options:
   -h, --help
 ```
 
+### `backstage-cli repo clean`
+
+```
+Usage: backstage-cli repo clean [options]
+
+Options:
+  -h, --help
+```
+
 ### `backstage-cli repo lint`
 
 ```

packages/cli/src/commands/index.ts

@@ -60,6 +60,11 @@ export function registerRepoCommand(program: Command) {
     .option('--fix', 'Attempt to automatically fix violations')
     .action(lazy(() => import('./repo/lint').then(m => m.command)));
 
+  command
+    .command('clean')
+    .description('Delete cache and output directories')
+    .action(lazy(() => import('./repo/clean').then(m => m.command)));
+
   command
     .command('list-deprecations', { hidden: true })
     .description('List deprecations. [EXPERIMENTAL]')

packages/cli/src/commands/repo/clean.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 { execFile as execFileCb } from 'child_process';
+import fs from 'fs-extra';
+import { resolve as resolvePath } from 'path';
+import { promisify } from 'util';
+import { PackageGraph } from '../../lib/monorepo';
+import { paths } from '../../lib/paths';
+
+const execFile = promisify(execFileCb);
+
+export async function command(): Promise<void> {
+  const packages = await PackageGraph.listTargetPackages();
+
+  await fs.remove(paths.resolveTargetRoot('dist'));
+  await fs.remove(paths.resolveTargetRoot('dist-types'));
+  await fs.remove(paths.resolveTargetRoot('coverage'));
+
+  await Promise.all(
+    Array.from(Array(10), async () => {
+      while (packages.length > 0) {
+        const pkg = packages.pop()!;
+        const cleanScript = pkg.packageJson.scripts?.clean;
+
+        if (
+          cleanScript === 'backstage-cli clean' ||
+          cleanScript === 'backstage-cli package clean'
+        ) {
+          await fs.remove(resolvePath(pkg.dir, 'dist'));
+          await fs.remove(resolvePath(pkg.dir, 'dist-types'));
+          await fs.remove(resolvePath(pkg.dir, 'coverage'));
+        } else if (cleanScript) {
+          const result = await execFile('yarn', ['run', 'clean'], {
+            cwd: pkg.dir,
+            shell: true,
+          });
+          process.stdout.write(result.stdout);
+          process.stderr.write(result.stderr);
+        }
+      }
+    }),
+  );
+}