first commit

build/node_modules/bin-check/index.js

@@ -0,0 +1,29 @@
+'use strict';
+var spawn = require('child_process').spawn;
+var executable = require('executable');
+
+module.exports = function (bin, cmd, cb) {
+	if (typeof cmd === 'function') {
+		cb = cmd;
+		cmd = ['--help'];
+	}
+
+	executable(bin, function (err, works) {
+		if (err) {
+			cb(err);
+			return;
+		}
+
+		if (!works) {
+			cb(new Error('Couldn\'t execute the `' + bin + '` binary. Make sure it has the right permissions.'));
+			return;
+		}
+
+		var cp = spawn(bin, cmd);
+
+		cp.on('error', cb);
+		cp.on('exit', function (code) {
+			cb(null, code === 0);
+		});
+	});
+};