feat(autocommit): implemented

package.json

@@ -59,7 +59,8 @@
     "fs-extra": "^6.0.1",
     "mustache": "^2.3.0",
     "optimist": "^0.6.1",
-    "swagger-parser": "^5.0.0"
+    "swagger-parser": "^5.0.0",
+    "which": "^1.3.1"
   },
   "devDependencies": {
     "@types/fs-extra": "^5.0.3",
@@ -69,6 +70,7 @@
     "@types/rimraf": "^2.0.2",
     "@types/swagger-parser": "^4.0.2",
     "@types/swagger-schema-official": "^2.0.10",
+    "@types/which": "^1.3.1",
     "dir-compare": "^1.4.0",
     "rimraf": "^2.5.2",
     "standard-version": "^4.4.0",

src/git.ts

@@ -0,0 +1,52 @@
+import { sync as whichSync } from 'which';
+import { spawnSync } from 'child_process';
+import { version } from '../package.json';
+
+type AsyncProcedure = (...args: any[]) => Promise<void>; // tslint:disable-line no-any
+
+interface CommitOptions {
+  addPath: string;
+}
+
+const COMMIT_MESSAGE = `chore(api-client): generated using version ${version}`;
+const COMMIT_AUTHOR = 'api-client-generator <[email protected]>';
+
+export function commitAfter(func: AsyncProcedure, {addPath}: CommitOptions): AsyncProcedure {
+  return async (...args: any[]) => { // tslint:disable-line no-any
+    if (whichSync('git', {nothrow: true}) == null) {
+      throw new Error('Git not installed on system');
+    }
+
+    if (stagedChanges()) {
+      throw new Error('There are staged changes in your repository');
+    }
+
+    await func(...args);
+    addFiles(addPath);
+    commitChanges();
+  };
+}
+
+function stagedChanges(): boolean {
+  const {status, stdout} = spawnSync('git', ['status', '--porcelain'], {encoding: 'utf8'});
+  if (status !== 0) {
+    throw new Error('Not inside a Git repository');
+  }
+
+  return stdout.split('\n').some(line => line.startsWith('A'));
+}
+
+function addFiles(addPath: string): void {
+  const {status, stderr} = spawnSync('git', ['add', addPath]);
+  if (status !== 0) {
+    throw new Error(`Error adding "${addPath}":\n${stderr}`);
+  }
+}
+
+function commitChanges(): void {
+  const commitArgs = ['--allow-empty', '--author', COMMIT_AUTHOR, '-m', COMMIT_MESSAGE];
+  const {status, stderr} = spawnSync('git', ['commit', ...commitArgs], {encoding: 'utf8'});
+  if (status !== 0) {
+    throw new Error(`Error committing:\n${stderr}`);
+  }
+}

src/main.ts

@@ -2,14 +2,19 @@
 
 import { generateAPIClient } from './generator';
 import * as opt from 'optimist';
+import { commitAfter } from './git';
 
 const optimist = opt
   .usage('Usage: api-client-generator -s path/to/swagger.[json|yaml]')
   .alias('h', 'help')
   .alias('s', 'source')
   .alias('o', 'output')
+  .alias('C', 'commit')
+  .alias('v', 'verbose')
   .describe('s', 'Path to the swagger file')
-  .describe('o', 'Path where generated files should be emitted');
+  .describe('o', 'Path where generated files should be emitted')
+  .describe('C', 'Autocommit changes')
+  .describe('v', 'Print error stack traces');
 
 const argv = optimist.argv;
 
@@ -25,7 +30,14 @@ if (typeof argv.source === 'undefined' && argv.source !== true) {
 
 const outputDir = argv.output || './output';
 const sourceFile = argv.source;
+const generate: typeof generateAPIClient = argv.commit ?
+  commitAfter(generateAPIClient, {addPath: outputDir}) :
+  generateAPIClient;
 
-generateAPIClient(sourceFile, outputDir)
+generate(sourceFile, outputDir)
   .then(() => console.info('Angular API client generated successfully'))
-  .catch((error: Error) => console.error('Error encored during generating', error));
+  .catch((error: Error) => console.error(
+    ...argv.verbose ?
+      ['Error encountered during generating:', error] :
+      [error.message]
+  ));

src/typings.d.ts

@@ -1,3 +1,7 @@
+declare module '*package.json' {
+  export const version: string;
+}
+
 declare module 'dir-compare' {
   export function compare(path1: string, path2: string, config: { [key: string]: string | boolean }): Promise<Result>;