gulp-colorguard/index.js

Keep a watchful eye on your css colors

'use strict';
var gutil = require('gulp-util');
var through = require('through2');
var colorguard = require('colorguard');

var pluginName = 'gulp-colorguard';
var PluginError = gutil.PluginError;

var logNoCollisions = function (filePath) {
    gutil.log(gutil.colors.magenta(filePath), 'has no css color collisions');
};

module.exports = function (options) {
    options = options || {};
    var logOk = Boolean(options.logOk);
    delete options.logOk;

    return through.obj(function (file, enc, cb) {
        if (file.isNull()) {
            cb(null, file);
            return;
        }
        if (file.isStream()) {
            cb(new PluginError(pluginName, 'Streaming not supported'));
            return;
        }
        var results;
        try {
            results = colorguard.inspect(file.contents.toString(), options);
        } catch (err) {
            err.message = pluginName + ': ' + err.message;
            cb(new PluginError(pluginName, err));
            return;
        }

        if (!results || !results.collisions) {
            if (logOk) {
                logNoCollisions(file.path);
            }
        } else {
            results.collisions.forEach(function (err) {
                this.emit('error', new PluginError(pluginName, gutil.colors.magenta(file.path) + ': ' + err.message, {
                    showStack: false
                }));
            }, this);
        }
        cb(null, file);
    });
};