Add reporter option (sindresorhus#55)

Author: Danny McCormick

cli.js

@@ -8,18 +8,42 @@ const awesomeLint = require('.');
 const main = async () => {
 	const cli = meow(`
 		Usage
-			$ awesome-lint
-	`);
+			$ awesome-lint <optional input filename>
+		
+		Options
+			--reporter, -r Use a custom reporter
+	`, {
+		flags: {
+			reporter: {
+				type: 'string',
+				alias: 'r'
+			}
+		}
+	});
 
 	const options = { };
 	const input = cli.input[0];
+	const reporterName = cli.flags.reporter;
 
 	if (input) {
 		options.filename = input;
 	} else {
 		options.filename = findReadmeFile(process.cwd());
 	}
 
+	if (reporterName) {
+		// Check if reporter is an npm package
+		try {
+			options.reporter = require(reporterName).report;
+		} catch (error) {
+			if (error.code === 'MODULE_NOT_FOUND') {
+				console.log(`No reporter found matching "${reporterName}". Proceeding with default reporter (vfile-reporter-pretty)`);
+			} else {
+				throw error;
+			}
+		}
+	}
+
 	await awesomeLint.report(options);
 };
 

index.js

@@ -58,6 +58,11 @@ lint.report = async options => {
 
 	if (messages.length === 0) {
 		spinner.succeed();
+
+		if (options.reporter) {
+			console.log(options.reporter([]));
+		}
+
 		return;
 	}
 
@@ -69,7 +74,9 @@ lint.report = async options => {
 	process.exitCode = 1;
 
 	file.path = path.basename(file.path);
-	console.log(vfileReporterPretty([file]));
+
+	const reporter = options.reporter || vfileReporterPretty;
+	console.log(reporter([file]));
 };
 
 module.exports = lint;

readme.md

@@ -88,7 +88,7 @@ Returns a `Promise` for a [`VFile`](https://github.com/wooorm/vfile).
 
 #### awesomeLint.report()
 
-Show the lint output.
+Show the lint output. This can be custom reported by setting `options.reporter=<function>` and passing in `options` as a parameter.
 
 
 ## Maintainers

test/api.js

@@ -4,3 +4,15 @@ import m from '..';
 test('main', async t => {
 	t.true((await m({filename: 'test/fixtures/main.md'})).messages.length > 0);
 });
+
+test('`reporter` option', async t => {
+	let wasReporterCalled = false;
+	const reporter = reports => {
+		if (reports.length > 0) {
+			wasReporterCalled = true;
+		}
+	};
+
+	await m.report({filename: 'test/fixtures/main.md', reporter});
+	t.true(wasReporterCalled);
+});