[eslint] add npm run lint

Author: ljharb

.eslintrc

@@ -0,0 +1,32 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"rules": {
+		"func-style": ["error", "declaration"],
+		"max-lines-per-function": "off",
+		"max-statements-per-line": ["error", { "max": 2 }],
+		"no-plusplus": "warn",
+		"sort-keys": "off",
+	},
+
+	"overrides": [
+		{
+			"files": "bin/**",
+			"env": {
+				"node": true,
+			},
+			"rules": {
+				"no-process-exit": "off",
+			}
+		},
+		{
+			"files": "example/**",
+			"rules": {
+				"no-magic-numbers": "off",
+				"no-plusplus": "off",
+			},
+		},
+	],
+}

bin/cmd.js

@@ -1,4 +1,7 @@
 #!/usr/bin/env node
+
+'use strict';
+
 var faucet = require('../');
 var minimist = require('minimist');
 var defined = require('defined');
@@ -9,65 +12,61 @@ var spawn = require('child_process').spawn;
 var fs = require('fs');
 var path = require('path');
 
+function jsFile(x) { return (/\.js$/i).test(x); }
+
 var argv = minimist(process.argv.slice(2));
 var tap = faucet({
-    width: defined(argv.w, argv.width, process.stdout.isTTY
-        ? process.stdout.columns - 5
-        : 0
-    )
+	width: defined(argv.w, argv.width, process.stdout.isTTY
+		? process.stdout.columns - 5
+		: 0)
 });
 process.on('exit', function (code) {
-    if (code === 0 && tap.exitCode !== 0) {
-        process.exit(tap.exitCode);
-    }
+	if (code === 0 && tap.exitCode !== 0) {
+		process.exit(tap.exitCode);
+	}
 });
 process.stdout.on('error', function () {});
 
 if (!process.stdin.isTTY || argv._[0] === '-') {
-    process.stdin.pipe(tap).pipe(process.stdout);
-    return;
+	process.stdin.pipe(tap).pipe(process.stdout);
+	return;
 }
 
 var files = argv._.reduce(function (acc, file) {
-    if (fs.statSync(file).isDirectory()) {
-        return acc.concat(fs.readdirSync(file).map(function (x) {
-            return path.join(file, x);
-        }).filter(jsFile));
-    }
-    else return acc.concat(file);
+	if (fs.statSync(file).isDirectory()) {
+		return acc.concat(fs.readdirSync(file).map(function (x) {
+			return path.join(file, x);
+		}).filter(jsFile));
+	}
+	return acc.concat(file);
 }, []);
 
 if (files.length === 0 && fs.existsSync('test')) {
-    files.push.apply(files, fs.readdirSync('test').map(function (x) {
-        return path.join('test', x);
-    }).filter(jsFile));
+	files.push.apply(files, fs.readdirSync('test').map(function (x) {
+		return path.join('test', x);
+	}).filter(jsFile));
 }
 if (files.length === 0 && fs.existsSync('tests')) {
-    files.push.apply(files, fs.readdirSync('tests').map(function (x) {
-        return path.join('tests', x);
-    }).filter(jsFile));
+	files.push.apply(files, fs.readdirSync('tests').map(function (x) {
+		return path.join('tests', x);
+	}).filter(jsFile));
 }
 
 if (files.length === 0) {
-    console.error('usage: `faucet [FILES]` or `| faucet`\n');
-    console.error(
-        'No test files or stdin provided and no files in test/ or tests/'
-        + ' directories found.'
-    );
-    return process.exit(1);
+	console.error('usage: `faucet [FILES]` or `| faucet`\n');
+	console.error('No test files or stdin provided and no files in test/ or tests/ directories found.');
+	process.exit(1);
 }
 
 var tape = spawn(tapeCmd, files);
 tape.stderr.pipe(process.stderr);
 tape.stdout.pipe(tap).pipe(process.stdout);
 
 var tapeCode;
-tape.on('exit', function (code) { tapeCode = code });
+tape.on('exit', function (code) { tapeCode = code; });
 process.on('exit', function (code) {
-    if (code === 0 && tapeCode !== 0) {
-        console.error('# non-zero exit from the `tape` command');
-        process.exit(tapeCode);
-    }
+	if (code === 0 && tapeCode !== 0) {
+		console.error('# non-zero exit from the `tape` command');
+		process.exit(tapeCode);
+	}
 });
-
-function jsFile (x) { return /\.js$/i.test(x) }

example/tape.js

@@ -1,13 +1,17 @@
+'use strict';
+
 var test = require('tape');
 
 test('beep boop', function (t) {
-    t.plan(2);
-    
-    t.equal(1 + 1, 2);
-    setTimeout(function () {
-        t.deepEqual(
-            'ABC'.toLowerCase().split(''),
-            ['a','b','c']
-        );
-    });
+	t.plan(2);
+
+	t.equal(1 + 1, 2);
+	setTimeout(function () {
+		t.deepEqual(
+			'ABC'.toLowerCase().split(''),
+			[
+				'a', 'b', 'c'
+			]
+		);
+	});
 });

example/test.js

@@ -1,27 +1,33 @@
+'use strict';
+
 var test = require('tape');
-function getMessage () {
-    var msgs = [ 'yes', 'equals', 'matches', 'yep', 'pretty much', 'woo' ];
-    return msgs[Math.floor(Math.random() * msgs.length)];
+
+function getMessage() {
+	var msgs = [
+		'yes', 'equals', 'matches', 'yep', 'pretty much', 'woo'
+	];
+	return msgs[Math.floor(Math.random() * msgs.length)];
 }
 
 test('beep affirmative', function (t) {
-    t.plan(24);
-    var i = 0, n = 0;
-    var iv = setInterval(function () {
-        t.equal(i++, n++, getMessage());
-        if (i === 24) clearInterval(iv);
-    }, 50);
+	t.plan(24);
+	var i = 0,
+		n = 0;
+	var iv = setInterval(function () {
+		t.equal(i++, n++, getMessage());
+		if (i === 24) { clearInterval(iv); }
+	}, 50);
 });
 
 test('boop exterminate', function (t) {
-    t.plan(20);
-    var i = 0, n = 0;
-    var iv = setInterval(function () {
-        if ((i + 2) % 8 === 0) {
-            t.equal(i, n + 6, getMessage())
-        }
-        else t.equal(i, n, getMessage());
-        i++; n++;
-        if (i === 20) clearInterval(iv);
-    }, 100);
+	t.plan(20);
+	var i = 0,
+		n = 0;
+	var iv = setInterval(function () {
+		if ((i + 2) % 8 === 0) {
+			t.equal(i, n + 6, getMessage());
+		} else { t.equal(i, n, getMessage()); }
+		i++; n++;
+		if (i === 20) { clearInterval(iv); }
+	}, 100);
 });