add ENV var to skip js rev'ing in dev if you want

Change-Id: I7eb1413191d9b0ca0178459b96430c796334d11b
Reviewed-on: https://gerrit.instructure.com/72376
Reviewed-by: Simon Williams <simon@instructure.com>
Reviewed-by: Ryan Shaw <ryan@instructure.com>
Tested-by: Jenkins
Product-Review: Ethan Vizitei <evizitei@instructure.com>
QA-Review: Ethan Vizitei <evizitei@instructure.com>

frontend_build/baseWebpackConfig.js

@@ -161,7 +161,11 @@ module.exports = {
     new webpack.IgnorePlugin(/(CHANGELOG|LICENSE|README)$/),
     new webpack.IgnorePlugin(/package.json/),
     new WebpackOnBuildPlugin(function(stats){
-      child_process.spawn("gulp", ["rev"]);
+      if(process.env.SKIP_JS_REV){
+        console.log("skipping rev...");
+      }else{
+        child_process.spawn("gulp", ["rev"]);
+      }
     }),
     new webpack.PrefetchPlugin("./app/coffeescripts/calendar/ContextSelector.coffee"),
     new webpack.PrefetchPlugin("./app/coffeescripts/calendar/TimeBlockRow.coffee"),

gulpfile.babel.js

@@ -2,6 +2,7 @@ const gulp = require('gulp')
 const gulpPlugins = require('gulp-load-plugins')()
 
 const DIST = 'public/dist'
+
 const STUFF_TO_REV = [
   'public/fonts/**/*',
   'public/images/**/*',
@@ -38,7 +39,12 @@ const STUFF_TO_REV = [
 
 
 gulp.task('rev', () => {
-  gulp.src(STUFF_TO_REV, {
+  var stuffToRev = STUFF_TO_REV;
+  if(process.env.SKIP_JS_REV){
+    // just get fonts and images
+    stuffToRev = STUFF_TO_REV.slice(0,2)
+  }
+  gulp.src(stuffToRev, {
     base: 'public', // tell it to use the 'public' folder as the base of all paths
     follow: true // follow symlinks, so it picks up on images inside plugins and stuff
   })