Merge pull request #8 from ngstack/prettier

support Prettier formatting

README.md

@@ -2,6 +2,14 @@
 
 Command-line utility for installing Angular libraries into the Angular CLI-based projects.
 
+## Main features
+
+- Install library from the NPM or local package (i.e. tarball file)
+- Copy library assets to corresponding application folders
+- Register library modules in the application
+- Format updated application module with Prettier
+- Generate new configuration file for a library
+
 ## Getting the tool
 
 Install as a global package using the following command:
@@ -25,6 +33,7 @@ Run `ngi` without parameters to see the internal help.
 | --skip-install     | skip installing library                                            |
 | --skip-assets      | skip copying assets                                                |
 | --skip-module      | skip module registration                                           |
+| --skip-format      | skip code formatting                                               |
 | -h, --help         | output usage information                                           |
 
 ## Preparing libraries

package.json

@@ -32,11 +32,13 @@
   "dependencies": {
     "chalk": "^2.4.1",
     "commander": "^2.18.0",
+    "prettier": "^1.14.3",
     "shelljs": "^0.8.2",
     "typescript": "^3.1.1"
   },
   "devDependencies": {
     "@types/node": "^10.11.4",
+    "@types/prettier": "^1.13.2",
     "@types/shelljs": "^0.8.0"
   }
 }

src/main.ts

@@ -24,6 +24,7 @@ program
   .option('--skip-install', 'skip installing library')
   .option('--skip-assets', 'skip copying assets')
   .option('--skip-module', 'skip module registration')
+  .option('--skip-format', 'skip code formatting')
   .action((lib: string, name: string, options: Options) => {
     if (options.init) {
       createConfig();
@@ -51,7 +52,7 @@ program
       }
       if (!options.skipModule) {
         console.log(chalk.blue('info'), 'registering modules');
-        registerModules(moduleName, config);
+        registerModules(moduleName, config, options.skipFormat);
       }
     }
 

src/options.ts

@@ -3,6 +3,7 @@ interface Options {
   skipInstall?: boolean;
   skipAssets?: boolean;
   skipModule?: boolean;
+  skipFormat?: boolean;
   module?: string;
 }
 

src/utils.ts

@@ -2,6 +2,7 @@ import sh from 'shelljs';
 import path from 'path';
 import fs from 'fs';
 import chalk from 'chalk';
+import prettier from 'prettier';
 
 import Configuration from './configuration';
 import TsUtils from './ts-utils';
@@ -66,7 +67,8 @@ export function copyAssets(lib: string, config: Configuration): void {
 
 export function registerModules(
   moduleName: string,
-  config: Configuration
+  config: Configuration,
+  skipFormat?: boolean
 ): void {
   if (config && config.modules && config.modules.length > 0) {
     const modulePath = path.join(
@@ -82,11 +84,22 @@ export function registerModules(
     sourceFile = tsUtils.registerModules(sourceFile, config.modules);
 
     const output = tsUtils.renderFile(sourceFile);
-    fs.writeFileSync(modulePath, output);
+    fs.writeFileSync(modulePath, skipFormat ? output : format(output));
   }
 }
 
 export function version(): string {
   const packageInfo = require(path.join(__dirname, '..', 'package.json'));
   return packageInfo.version;
 }
+
+export function format(source: string): string {
+  console.log(chalk.blue('info'), `formatting code`);
+
+  const options = prettier.resolveConfig.sync(process.cwd()) || {
+    parser: 'typescript',
+    singleQuote: true
+  };
+
+  return prettier.format(source, options);
+}