Added more checks and release on npm

Author: w0rm

README.md

@@ -10,11 +10,13 @@ var postcss = require('gulp-postcss')
 var gulp = require('gulp')
 var autoprefixer = require('autoprefixer')
 var mqpacker = require('css-mqpacker')
+var csswring = require('csswring')
 
 gulp.task('css', function () {
   var processors = [
     autoprefixer('last 1 version').postcss
   , mqpacker.processor
+  , csswring.postcss
   ]
   return gulp.src('./src/*.css')
     .pipe(postcss(processors))

index.js

@@ -6,10 +6,18 @@ var gutil = require('gulp-util')
 
 module.exports = function (processors, options) {
 
+  if (!Array.isArray(processors)) {
+    throw new gutil.PluginError('gulp-postcss', 'Please provide array of postcss processors!')
+  }
+
   return through.obj(transform)
 
   function transform (file, encoding, cb) {
 
+    if (file.isStream()) {
+      return cb(new gutil.PluginError('gulp-postcss', 'Streams are not supported!'))
+    }
+
     // Source map is inline by default
     var opts = { map: 'inline' }
     var processor = postcss()
@@ -31,14 +39,13 @@ module.exports = function (processors, options) {
       opts.from = file.path
     }
 
-    processors.forEach(processor.use.bind(processor))
-
     // Generate separate source map for gulp-sourcemap
     if (file.sourceMap) {
       opts.map = true
     }
 
     try {
+      processors.forEach(processor.use.bind(processor))
       result = processor.process(file.contents.toString('utf8'), opts)
     } catch (err) {
       return cb(new gutil.PluginError('gulp-postcss', err))

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gulp-postcss",
-  "version": "0.0.2",
+  "version": "1.0.0",
   "description": "PostCSS gulp plugin",
   "main": "index.js",
   "scripts": {
@@ -11,7 +11,7 @@
     "url": "https://github.com/w0rm/gulp-postcss.git"
   },
   "keywords": [
-    "gulp",
+    "gulpplugin",
     "postcss",
     "css"
   ],

test.js

@@ -46,6 +46,14 @@ it('should correctly wrap postcss errors', function (cb) {
 })
 
 
+it ('should throw error if processors are not provided', function (cb) {
+  assert.throws( function () { postcss() }, gutil.PluginError )
+  assert.throws( function () { postcss('') }, gutil.PluginError )
+  assert.throws( function () { postcss({}) }, gutil.PluginError )
+  cb()
+})
+
+
 function doubler (css) {
   css.eachDecl(function (decl) {
     decl.parent.prepend(decl.clone())