fix(hook): Windows support (#176)

src/commands/hook.ts

@@ -1,6 +1,6 @@
 import fs from 'fs/promises';
 import path from 'path';
-import { fileURLToPath } from 'url';
+import { fileURLToPath, pathToFileURL } from 'url';
 import { green, red } from 'kolorist';
 import { command } from 'cleye';
 import { assertGitRepo } from '../utils/git.js';
@@ -10,14 +10,24 @@ import { KnownError, handleCliError } from '../utils/error.js';
 const hookName = 'prepare-commit-msg';
 const symlinkPath = `.git/hooks/${hookName}`;
 
-export const isCalledFromGitHook = process.argv[1].endsWith(`/${symlinkPath}`);
+const hookPath = fileURLToPath(new URL('cli.mjs', import.meta.url));
+
+export const isCalledFromGitHook = (
+	process.argv[1]
+		.replace(/\\/g, '/') // Replace Windows back slashes with forward slashes
+		.endsWith(`/${symlinkPath}`)
+);
+
+const isWindows = process.platform === 'win32';
+const windowsHook = `
+#!/usr/bin/env node
+import(${JSON.stringify(pathToFileURL(hookPath))})
+`.trim();
 
 export default command({
 	name: 'hook',
 	parameters: ['<install/uninstall>'],
 }, (argv) => {
-	const hookPath = fileURLToPath(new URL('cli.mjs', import.meta.url));
-
 	(async () => {
 		await assertGitRepo();
 
@@ -37,8 +47,16 @@ export default command({
 			}
 
 			await fs.mkdir(path.dirname(symlinkPath), { recursive: true });
+
+			if (isWindows) {
+				await fs.writeFile(
+					symlinkPath,
+					windowsHook,
+				);
+			} else {
 				await fs.symlink(hookPath, symlinkPath, 'file');
 				await fs.chmod(symlinkPath, 0o755);
+			}
 			console.log(`${green('✔')} Hook installed`);
 			return;
 		}
@@ -48,11 +66,20 @@ export default command({
 				console.warn('Hook is not installed');
 				return;
 			}
+
+			if (isWindows) {
+				const scriptContent = await fs.readFile(symlinkPath, 'utf8');
+				if (scriptContent !== windowsHook) {
+					console.warn('Hook is not installed');
+					return;
+				}
+			} else {
 				const realpath = await fs.realpath(symlinkPath);
 				if (realpath !== hookPath) {
 					console.warn('Hook is not installed');
 					return;
 				}
+			}
 
 			await fs.rm(symlinkPath);
 			console.log(`${green('✔')} Hook uninstalled`);

src/commands/prepare-commit-msg-hook.ts

@@ -50,14 +50,32 @@ export default () => (async () => {
 	} finally {
 		s.stop('Changes analyzed');
 	}
+
+	/**
+	 * When `--no-edit` is passed in, the base commit message is empty,
+	 * and even when you use pass in comments via #, they are ignored.
+	 *
+	 * Note: `--no-edit` cannot be detected in argvs so this is the only way to check
+	 */
+	const baseMessage = await fs.readFile(messageFilePath, 'utf8');
+	const supportsComments = baseMessage !== '';
 	const hasMultipleMessages = messages.length > 1;
-	let instructions = `# 🤖 AI generated commit${hasMultipleMessages ? 's' : ''}\n`;
+
+	let instructions = '';
+
+	if (supportsComments) {
+		instructions = `# 🤖 AI generated commit${hasMultipleMessages ? 's' : ''}\n`;
+	}
 
 	if (hasMultipleMessages) {
+		if (supportsComments) {
 			instructions += '# Select one of the following messages by uncommeting:\n';
+		}
 		instructions += `\n${messages.map(message => `# ${message}`).join('\n')}`;
 	} else {
+		if (supportsComments) {
 			instructions += '# Edit the message below and commit:\n';
+		}
 		instructions += `\n${messages[0]}\n`;
 	}
 

tests/index.ts

@@ -3,4 +3,5 @@ import { describe } from 'manten';
 describe('aicommits', ({ runTestSuite }) => {
 	runTestSuite(import('./specs/cli/index.js'));
 	runTestSuite(import('./specs/config.js'));
+	runTestSuite(import('./specs/git-hook.js'));
 });

tests/specs/cli/commits.ts

@@ -1,7 +1,5 @@
 import { testSuite, expect } from 'manten';
-import { createFixture, createGit } from '../../utils.js';
-
-const { OPENAI_KEY } = process.env;
+import { createFixture, createGit, files } from '../../utils.js';
 
 export default testSuite(({ describe }) => {
 	if (process.platform === 'win32') {
@@ -10,17 +8,12 @@ export default testSuite(({ describe }) => {
 		return;
 	}
 
-	if (!OPENAI_KEY) {
+	if (!process.env.OPENAI_KEY) {
 		console.warn('⚠️  process.env.OPENAI_KEY is necessary to run these tests. Skipping...');
 		return;
 	}
 
 	describe('CLI', async ({ test, describe }) => {
-		const files = {
-			'.aicommits': `OPENAI_KEY=${OPENAI_KEY}`,
-			'data.json': 'Lorem ipsum dolor sit amet '.repeat(10),
-		} as const;
-
 		test('Excludes files', async () => {
 			const { fixture, aicommits } = await createFixture(files);
 			const git = await createGit(fixture.path);

tests/specs/git-hook.ts

@@ -0,0 +1,40 @@
+import { testSuite, expect } from 'manten';
+import { createFixture, createGit, files } from '../utils.js';
+
+export default testSuite(({ describe }) => {
+	describe('Git hook', ({ test }) => {
+		test('errors when not in Git repo', async () => {
+			const { fixture, aicommits } = await createFixture(files);
+			const { exitCode, stderr } = await aicommits(['hook', 'install'], {
+				reject: false,
+			});
+
+			expect(exitCode).toBe(1);
+			expect(stderr).toMatch('The current directory must be a Git repository');
+
+			await fixture.rm();
+		});
+
+		test('Commits', async () => {
+			const { fixture, aicommits } = await createFixture(files);
+			const git = await createGit(fixture.path);
+
+			const { stdout } = await aicommits(['hook', 'install']);
+			expect(stdout).toMatch('Hook installed');
+
+			await git('add', ['data.json']);
+			await git('commit', ['--no-edit'], {
+				env: {
+					HOME: fixture.path,
+					USERPROFILE: fixture.path,
+				},
+			});
+
+			const { stdout: commitMessage } = await git('log', ['--pretty=%B']);
+			console.log('Committed with:', commitMessage);
+			expect(commitMessage.startsWith('# ')).not.toBe(true);
+
+			await fixture.rm();
+		});
+	});
+});

tests/utils.ts

@@ -72,3 +72,8 @@ export const createFixture = async (
 		aicommits,
 	};
 };
+
+export const files = Object.freeze({
+	'.aicommits': `OPENAI_KEY=${process.env.OPENAI_KEY}`,
+	'data.json': 'Lorem ipsum dolor sit amet '.repeat(10),
+});