cli: initial create command

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

packages/cli/src/commands/create/create.ts

@@ -0,0 +1,42 @@
+/*
+ * 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 { Command } from 'commander';
+
+function parseOptions(optionStrings: string[]): Record<string, string> {
+  const options: Record<string, string> = {};
+
+  for (const str of optionStrings) {
+    const [key] = str.split('=', 1);
+    const value = str.slice(key.length + 1);
+    if (!key || !value) {
+      throw new Error(
+        `Invalid option '${str}', must be of the format <key>=<value>`,
+      );
+    }
+    options[key] = value;
+  }
+
+  return options;
+}
+
+export default async (cmd: Command) => {
+  const selected = cmd.opts().select;
+  console.log('DEBUG: selected =', selected);
+
+  const options = parseOptions(cmd.opts().option);
+  console.log('DEBUG: options =', options);
+};

packages/cli/src/commands/index.ts

@@ -75,6 +75,24 @@ export function registerCommands(program: CommanderStatic) {
     .option(...configOption)
     .action(lazy(() => import('./backend/dev').then(m => m.default)));
 
+  program
+    .command('create')
+    .storeOptionsAsProperties(false)
+    .description(
+      'Open up an interactive guide to creating new things in your app',
+    )
+    .option(
+      '--select <name>',
+      'Select the thing you want to be creating upfront',
+    )
+    .option(
+      '--option <name>=<value>',
+      'Pre-fill options for the creation process',
+      (opt, arr: string[]) => [...arr, opt],
+      [],
+    )
+    .action(lazy(() => import('./create/create').then(m => m.default)));
+
   program
     .command('create-plugin')
     .option(