add postcss and autoprefixer

Author: tknipfer

package.json

@@ -50,12 +50,14 @@
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-nodent": "^0.1.3",
     "rollup-plugin-post-replace": "^1.0.0",
+    "rollup-plugin-postcss": "^0.5.5",
     "rollup-plugin-preserve-shebang": "^0.1.3",
     "rollup-plugin-sizes": "^0.4.2",
     "rollup-plugin-uglify": "^2.0.1",
     "yargs": "^10.0.3"
   },
   "devDependencies": {
+    "autoprefixer": "^7.2.3",
     "babel-cli": "^6.26.0",
     "babel-preset-env": "^1.6.1",
     "eslint": "^4.13.0",

src/index.js

@@ -4,24 +4,27 @@ import chalk from 'chalk';
 import { map, series } from 'asyncro';
 import promisify from 'es6-promisify';
 import glob from 'glob';
+import autoprefixer from 'autoprefixer';
 import { rollup, watch } from 'rollup';
 import nodent from 'rollup-plugin-nodent';
 import commonjs from 'rollup-plugin-commonjs';
 import nodeResolve from 'rollup-plugin-node-resolve';
 import buble from 'rollup-plugin-buble';
 import uglify from 'rollup-plugin-uglify';
+import postcss from 'rollup-plugin-postcss';
 // import replace from 'rollup-plugin-post-replace';
 import es3 from 'rollup-plugin-es3';
 import gzipSize from 'gzip-size';
 import prettyBytes from 'pretty-bytes';
 import shebangPlugin from 'rollup-plugin-preserve-shebang';
 import flow from 'rollup-plugin-flow';
+import camelCase from 'camelcase';
 
 const readFile = promisify(fs.readFile);
 const stat = promisify(fs.stat);
 const isDir = name => stat(name).then( stats => stats.isDirectory() ).catch( () => false );
 const isFile = name => stat(name).then( stats => stats.isFile() ).catch( () => false );
-const safeVariableName = name => name.replace(/(?:^[^a-z$_]|([^a-z0-9_$]+))/g, '_');
+const safeVariableName = name => camelCase(name.toLowerCase().replace(/((^[^a-zA-Z]+)|[^\w.-])|([^a-zA-Z0-9]+$)/g, ''));
 
 const FORMATS = ['es', 'cjs', 'umd'];
 
@@ -171,6 +174,12 @@ function createConfig(options, entry, format) {
 			input: entry,
 			external,
 			plugins: [
+				postcss({
+					plugins: [
+						autoprefixer()
+					],
+					extract: true
+				}),
 				flow({ all: true }),
 				nodent({
 					exclude: 'node_modules/**',