fix(minifer): use gulplog for the warning

Allows `gulp-cli` to format the log line based on the user's current
options.

lib/log.js

@@ -0,0 +1,15 @@
+'use strict';
+var hasLog = require('has-gulplog');
+var each = require('lodash/fp/forEach');
+
+var levels = ['debug', 'info', 'warn', 'error'];
+
+each(function (level) {
+  module.exports[level] = function () {
+    if (hasLog()) {
+      var log = require('gulplog');
+
+      log[level].apply(log, arguments);
+    }
+  };
+}, levels);

minifier.js

@@ -1,7 +1,6 @@
 'use strict';
 var through = require('through2');
 var PluginError = require('gulp-util/lib/PluginError');
-var log = require('fancy-log');
 var applySourceMap = require('vinyl-sourcemaps-apply');
 var saveLicense = require('uglify-save-license');
 var isObject = require('lodash/fp/isObject');
@@ -10,6 +9,7 @@ var map = require('lodash/fp/map');
 var prop = require('lodash/fp/prop');
 var _ = require('lodash/fp/placeholder');
 var defaultsDeep = require('lodash/fp/defaultsDeep');
+var log = require('./lib/log');
 var createError = require('./lib/create-error');
 
 var reSourceMapComment = /\n\/\/# sourceMappingURL=.+?$/;
@@ -29,7 +29,7 @@ function trycatch(fn, handle) {
 
 function setup(opts) {
   if (opts && !isObject(opts)) {
-    log('gulp-uglify expects an object, non-object provided');
+    log.warn('gulp-uglify expects an object, non-object provided');
     opts = {};
   }
 

package.json

@@ -5,8 +5,9 @@
   "author": "Terin Stock <[email protected]>",
   "bugs": "https://github.com/terinjokes/gulp-uglify/issues",
   "dependencies": {
-    "fancy-log": "^1.0.0",
     "gulp-util": "^3.0.0",
+    "gulplog": "^1.0.0",
+    "has-gulplog": "^0.1.0",
     "lodash": "^4.13.1",
     "through2": "^2.0.0",
     "uglify-js": "2.7.0",

test/minify.js

@@ -2,6 +2,7 @@
 var test = require('tape');
 var Vinyl = require('vinyl');
 var uglifyjs = require('uglify-js');
+var gulplog = require('gulplog');
 var gulpUglify = require('../');
 
 var testContentsInput = '"use strict"; (function(console, first, second) { console.log(first + second) }(5, 10))';
@@ -36,10 +37,14 @@ test('should minify files', function (t) {
 });
 
 test('should minify files when string is passed as argument', function (t) {
-  t.plan(7);
+  t.plan(8);
 
   var stream = gulpUglify('build.min.js');
 
+  gulplog.on('warn', function (msg) {
+    t.ok(msg, 'gulp-uglify expects an object, non-object provided');
+  });
+
   stream.on('data', function (newFile) {
     t.ok(newFile, 'emits a file');
     t.ok(newFile.path, 'file has a path');