feat(CLI): v2

src/cli/args.ts

@@ -0,0 +1,93 @@
+import meow from 'meow';
+import { Package, UpdateInfo, UpdateNotifier } from 'update-notifier';
+import { Runner, TypescriptStarterOptions, validateName } from './primitives';
+
+export async function checkArgs(): Promise<
+  TypescriptStarterOptions | undefined
+> {
+  const cli = meow(
+    `
+	Usage
+	  $ typescript-starter
+
+  Non-Interactive Usage
+    $ typescript-starter <project-name> [options]
+  
+	Options
+    --description, -d   package.json description
+    --yarn              use yarn (default: npm)
+    --node              include node.js type definitions
+    --dom               include DOM type definitions
+    --noinstall         skip yarn/npm install
+
+    Non-Interactive Example
+	  $ typescript-starter my-library -d 'do something, better'
+    `,
+    {
+      flags: {
+        description: {
+          alias: 'd',
+          default: 'a typescript-starter project',
+          type: 'string'
+        },
+        dom: {
+          default: false,
+          type: 'boolean'
+        },
+        node: {
+          default: false,
+          type: 'boolean'
+        },
+        noinstall: {
+          default: false,
+          type: 'boolean'
+        },
+        yarn: {
+          default: false,
+          type: 'boolean'
+        }
+      }
+    }
+  );
+
+  // immediately check for updates every time we run typescript-starter
+  const updateInfo = await new Promise<UpdateInfo>((resolve, reject) => {
+    const notifier = new UpdateNotifier({
+      callback: (error, update) => {
+        // tslint:disable-next-line:no-expression-statement
+        error ? reject(error) : resolve(update);
+      },
+      pkg: cli.pkg as Package
+    });
+    // tslint:disable-next-line:no-expression-statement
+    notifier.check();
+  });
+  // tslint:disable-next-line:no-if-statement
+  if (updateInfo.type !== 'latest') {
+    throw new Error(`
+    Your version of typescript-starter is outdated.
+    Consider using 'npx typescript-starter' to always get the latest version.
+    `);
+  }
+
+  const input = cli.input[0];
+  // tslint:disable-next-line:no-if-statement
+  if (!input) {
+    // no project-name provided, return to collect options in interactive mode
+    return undefined;
+  }
+  const validOrMsg = await validateName(input);
+  // tslint:disable-next-line:no-if-statement
+  if (typeof validOrMsg === 'string') {
+    throw new Error(validOrMsg);
+  }
+
+  return {
+    description: cli.flags.description,
+    domDefinitions: cli.flags.dom,
+    install: !cli.flags.noinstall,
+    name: input,
+    nodeDefinitions: cli.flags.node,
+    runner: cli.flags.yarn ? Runner.Yarn : Runner.Npm
+  };
+}