fix: observe working directory with --last option

Author: benquarmby

@commitlint/read/src/read.test.ts

@@ -72,3 +72,15 @@ test('get edit commit message while skipping first commit', async () => {
 	const actual = await read({from: 'HEAD~2', cwd, gitLogArgs: '--skip 1'});
 	expect(actual).toEqual(expected);
 });
+
+test('should only read the last commit', async () => {
+	const cwd: string = await git.bootstrap();
+
+	await execa('git', ['commit', '--allow-empty', '-m', 'commit Z'], {cwd});
+	await execa('git', ['commit', '--allow-empty', '-m', 'commit Y'], {cwd});
+	await execa('git', ['commit', '--allow-empty', '-m', 'commit X'], {cwd});
+
+	const result = await read({cwd, last: true});
+
+	expect(result).toEqual(['commit X']);
+});

@commitlint/read/src/read.ts

@@ -26,11 +26,11 @@ export default async function getCommitMessages(
 	}
 
 	if (last) {
-		const gitCommandResult = await execa('git', [
-			'log',
-			'-1',
-			'--pretty=format:%B',
-		]);
+		const gitCommandResult = await execa(
+			'git',
+			['log', '-1', '--pretty=format:%B'],
+			{cwd}
+		);
 		let output = gitCommandResult.stdout;
 		// strip output of extra quotation marks ("")
 		if (output[0] == '"' && output[output.length - 1] == '"')