feat: config command (#71)

src/utils/git.ts

@@ -0,0 +1,39 @@
+import { execa } from 'execa';
+
+export const assertGitRepo = async () => {
+	const { stdout } = await execa('git', ['rev-parse', '--is-inside-work-tree'], { reject: false });
+
+	if (stdout !== 'true') {
+		throw new Error('The current directory must be a Git repository!');
+	}
+};
+
+const excludeFromDiff = [
+	'package-lock.json',
+	'yarn.lock',
+	'pnpm-lock.yaml',
+].map(file => `:(exclude)${file}`);
+
+export const getStagedDiff = async () => {
+	const diffCached = ['diff', '--cached'];
+	const { stdout: files } = await execa(
+		'git',
+		[...diffCached, '--name-only', ...excludeFromDiff],
+	);
+
+	if (!files) {
+		return;
+	}
+
+	const { stdout: diff } = await execa(
+		'git',
+		[...diffCached, ...excludeFromDiff],
+	);
+
+	return {
+		files: files.split('\n'),
+		diff,
+	};
+};
+
+export const getDetectedMessage = (files: string[]) => `Detected ${files.length.toLocaleString()} staged file${files.length > 1 ? 's' : ''}`;