cherry-picked "Remove dist folder, closes #820 (#840)"

.github/CONTRIBUTING.md

@@ -11,9 +11,3 @@ For bug reports, please include:
 JSFiddle template: https://jsfiddle.net/ad3quksn/349/
 
 JSFiddle template for IE11 and other old browsers: https://jsfiddle.net/ad3quksn/350/
-
----
-
-For pull requests:
-
-**Please make sure that `dist/*` files aren't committed.**

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 package-lock.json
+dist

README.md

@@ -166,8 +166,6 @@ If you would like to contribute enhancements or fixes, please do the following:
   - in browser: http://localhost:8080/test/qunit/
   - via CLI: `npm test`
 
-6. Make sure that `dist/*` files aren't committed and create a pull request.
-
 
 Related projects
 -------------------------

config/utils.js

@@ -5,6 +5,10 @@ const banner = require('./banner.js')
 const fs = require('fs')
 const uglify = require('uglify-js')
 const css = require('rollup-plugin-css-only')
+const pify = require('pify')
+const mkdirp = require('mkdirp')
+
+const mkdirpAsync = pify(mkdirp)
 
 const toUpper = (_, c) => {
   return c ? c.toUpperCase() : ''
@@ -26,15 +30,18 @@ const write = (dest, code) => {
 
 const packageRollup = (options) => {
   const moduleId = classify(pack.name)
-  return rollup({
-    input: options.entry || 'src/sweetalert2.js',
-    plugins: [
-      css({ output: false }),
-      babel({
-        exclude: 'node_modules/**'
+  return mkdirpAsync('./dist')
+    .then(() => {
+      return rollup({
+        input: options.entry || 'src/sweetalert2.js',
+        plugins: [
+          css({ output: false }),
+          babel({
+            exclude: 'node_modules/**'
+          })
+        ]
       })
-    ]
-  })
+    })
   .then((bundle) => {
     return bundle.generate({
       format: options.format,