grunt-yamllint/tasks/yamllint.js

Linting YAML files for correctness using JS-YAML.

'use strict';

module.exports = function(grunt) {

	var yaml = require('js-yaml');
	var os = require('os');
	var fs = require('fs');
	var async = require('async');
	var chalk = require('chalk');

	grunt.registerMultiTask('yamllint', 'Linting YAML files for correctness.',function(){
		var done = this.async();
		var files = this.filesSrc;
		var options = this.options({
			force: false,
			filename: null,
			onWarning: null,
			schema: null,
			reporterOutput: null
		});
		var pass = true;
	    var force = options.force;

	    if(yaml[options.schema]) {
			grunt.verbose.writeln(chalk.yellow('Using ' + options.schema + ' schema'));
	    	options.schema = yaml[options.schema];
	    } else {
			grunt.verbose.writeln(chalk.yellow('Using default schema'));
	    	options.schema = yaml.DEFAULT_SAFE_SCHEMA;
	    }

		async.eachLimit(files, os.cpus().length, function(file,next) {
			fs.readFile(file,'utf8',function(err, content) {
				if(err) {
					grunt.log.writeln('err');
					grunt.error(err);
					done(force);
					return process.nextTick(next);
				}
				var current_pass = true;
				var doc;
				try {
					// console.log(JSON.stringify(options));
					yaml.loadAll(content, function(content) {
						doc += content;
					},options);
				} catch(e) {
					grunt.log.writeln(chalk.yellow('An error has occured in:' + file));
					grunt.log.writeln(chalk.red(e));
					pass = false;
					current_pass = false;
				}

				if(current_pass) {                
					grunt.verbose.writeln(chalk.green('✔ ') + file + chalk.gray(' ( valid YAML )'));
				}
				return process.nextTick(next);
			});
		}, function(err){
			if(err) {
				grunt.warn(err);
			}
			if(pass) {
				grunt.log.writeln(chalk.green('✔ ') + chalk.gray(' All files valid YAML '));
			}
			done(force?true:pass);
		});

	});
};