feat: create git repository in init command (#2088)

* feat: create git repository in `init` command

* feat: handle creating project in git repository

* feat: get react-native version from `node_modules`

__e2e__/init.test.ts

@@ -21,6 +21,7 @@ function createCustomTemplateFiles() {
 }
 
 const customTemplateCopiedFiles = [
+  '.git',
   'dir',
   'file',
   'node_modules',

packages/cli/src/commands/init/createGitRepository.ts

@@ -0,0 +1,66 @@
+import {getLoader, logger} from '@react-native-community/cli-tools';
+import execa from 'execa';
+import fs from 'fs';
+import path from 'path';
+
+const createGitRepository = async (folder: string) => {
+  const loader = getLoader();
+
+  try {
+    await execa('git', ['--version'], {stdio: 'ignore'});
+  } catch {
+    loader.fail('Unable to initialize Git repo. `git` not in $PATH.');
+    return;
+  }
+
+  try {
+    await execa('git', ['rev-parse', '--is-inside-work-tree'], {
+      stdio: 'ignore',
+      cwd: folder,
+    });
+    loader.succeed(
+      'New project is already inside of a Git repo, skipping git init.',
+    );
+    return;
+  } catch {}
+
+  loader.start('Initializing Git repository');
+
+  let version;
+
+  try {
+    version = JSON.parse(
+      fs.readFileSync(
+        path.join('node_modules/react-native/package.json'),
+        'utf8',
+      ),
+    ).version;
+  } catch {}
+
+  try {
+    await execa('git', ['init'], {cwd: folder});
+    await execa('git', ['branch', '-M', 'main'], {cwd: folder});
+    await execa('git', ['add', '.'], {cwd: folder});
+    await execa(
+      'git',
+      [
+        'commit',
+        '-m',
+        `Initial commit\n\n${
+          version ? 'Generated by react-native@' + version : ''
+        }`,
+      ],
+      {
+        cwd: folder,
+      },
+    );
+    loader.succeed();
+  } catch (e) {
+    loader.fail(
+      'Could not create an empty Git repository, see debug logs with --verbose',
+    );
+    logger.debug(e as string);
+  }
+};
+
+export default createGitRepository;

packages/cli/src/commands/init/init.ts

@@ -28,6 +28,7 @@ import {getBunVersionIfAvailable} from '../../tools/bun';
 import {getNpmVersionIfAvailable} from '../../tools/npm';
 import {getYarnVersionIfAvailable} from '../../tools/yarn';
 import {createHash} from 'crypto';
+import createGitRepository from './createGitRepository';
 
 const DEFAULT_VERSION = 'latest';
 
@@ -340,5 +341,7 @@ export default (async function initialize(
   await createProject(projectName, directoryName, version, options);
 
   const projectFolder = path.join(root, directoryName);
+
+  await createGitRepository(projectFolder);
   printRunInstructions(projectFolder, projectName);
 });