attempt to fix rebasing, update deps

Author: scniro

gulpfile.js

@@ -11,7 +11,7 @@ gulp.task('pre-test', function () {
 
 gulp.task('test', ['pre-test'], function () {
   return gulp.src('test/*.js')
-    .pipe(mocha({reporter: 'list'}))
+    .pipe(mocha({reporter: 'dot'}))
     .pipe(istanbul.writeReports({
       includeUntested: true,
       reporters: ['lcov']

index.js

@@ -11,7 +11,7 @@ module.exports = function gulpCleanCSS(options, callback) {
   if (arguments.length === 1 && Object.prototype.toString.call(arguments[0]) === '[object Function]')
     callback = arguments[0];
 
-  var transform = function (file, enc, cb) {
+  let transform = function (file, enc, cb) {
 
     if (!file || !file.contents)
       return cb(null, file);
@@ -24,21 +24,27 @@ module.exports = function gulpCleanCSS(options, callback) {
     if (file.sourceMap)
       options.sourceMap = JSON.parse(JSON.stringify(file.sourceMap));
 
-    var style = file.contents ? file.contents.toString() : '';
+    if (options.rebaseTo) {
+
+      let relative = path.resolve(file.path, options.rebaseTo);
+      options.rebaseTo = path.relative(relative, file.path)
+    }
+
+    let style = file.contents ? file.contents.toString() : '';
 
     new CleanCSS(options).minify(style, function (errors, css) {
 
       if (errors)
         return cb(errors.join(' '));
 
       if (typeof callback === 'function') {
-        var details = {
+        let details = {
           'stats': css.stats,
           'errors': css.errors,
           'warnings': css.warnings,
           'path': file.path,
           'name': file.path.split(file.base)[1]
-        }
+        };
 
         if (css.sourceMap)
           details['sourceMap'] = css.sourceMap;
@@ -50,7 +56,7 @@ module.exports = function gulpCleanCSS(options, callback) {
 
       if (css.sourceMap) {
 
-        var map = JSON.parse(css.sourceMap);
+        let map = JSON.parse(css.sourceMap);
         map.file = path.relative(file.base, file.path);
         map.sources = map.sources.map(function (src) {
           return path.relative(file.base, file.path)

package.json

@@ -2,7 +2,7 @@
   "name": "gulp-clean-css",
   "description": "Minify css with clean-css.",
   "homepage": "https://github.com/scniro/gulp-clean-css#readme",
-  "version": "3.0.4",
+  "version": "3.1.0",
   "author": "scniro",
   "license": "MIT",
   "bugs": {
@@ -29,28 +29,28 @@
     "gulpfriendly"
   ],
   "dependencies": {
-    "clean-css": "^4.0.9",
-    "gulp-util": "^3.0.8",
-    "through2": "^2.0.3",
-    "vinyl-sourcemaps-apply": "^0.2.1"
+    "clean-css": "4.1.0",
+    "gulp-util": "3.0.8",
+    "through2": "2.0.3",
+    "vinyl-sourcemaps-apply": "0.2.1"
   },
   "devDependencies": {
-    "chai": "^3.5.0",
-    "chai-string": "^1.3.0",
-    "coveralls": "^2.12.0",
-    "del": "^2.2.2",
-    "express": "^4.15.2",
-    "gulp": "^3.9.1",
-    "gulp-concat": "^2.6.1",
-    "gulp-istanbul": "^1.1.1",
-    "gulp-mocha": "^4.0.1",
-    "gulp-rename": "^1.2.2",
-    "gulp-sass": "^3.1.0",
-    "gulp-sourcemaps": "^2.4.1",
-    "mocha": "^3.2.0",
-    "vinyl": "^2.0.1",
-    "vinyl-buffer": "^1.0.0",
-    "vinyl-fs-fake": "^1.1.0"
+    "chai": "3.5.0",
+    "chai-string": "1.3.0",
+    "coveralls": "2.13.1",
+    "del": "2.2.2",
+    "express": "4.15.2",
+    "gulp": "3.9.1",
+    "gulp-concat": "2.6.1",
+    "gulp-istanbul": "1.1.1",
+    "gulp-mocha": "4.3.1",
+    "gulp-rename": "1.2.2",
+    "gulp-sass": "3.1.0",
+    "gulp-sourcemaps": "2.6.0",
+    "mocha": "3.3.0",
+    "vinyl": "2.0.2",
+    "vinyl-buffer": "1.0.0",
+    "vinyl-fs-fake": "1.1.0"
   },
   "scripts": {
     "test": "gulp test"