From f2c5cd6fdaed5fc52465bf0abec39c813e6922d6 Mon Sep 17 00:00:00 2001
From: Kevin Sawicki <kevin@github.com>
Date: Wed, 27 Jan 2016 16:16:38 -0800
Subject: [PATCH] Add fallback less cache during build

---
 build/Gruntfile.coffee                | 2 ++
 build/tasks/prebuild-less-task.coffee | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/build/Gruntfile.coffee b/build/Gruntfile.coffee
index 80bc37688..34fca698f 100644
--- a/build/Gruntfile.coffee
+++ b/build/Gruntfile.coffee
@@ -121,6 +121,8 @@ module.exports = (grunt) ->
       ext: '.css'
 
   prebuildLessConfig =
+    options:
+      cachePath: path.join(homeDir, '.atom', 'compile-cache', 'prebuild-less')
     src: [
       'static/**/*.less'
     ]
diff --git a/build/tasks/prebuild-less-task.coffee b/build/tasks/prebuild-less-task.coffee
index 9a2d89723..acd45ea2e 100644
--- a/build/tasks/prebuild-less-task.coffee
+++ b/build/tasks/prebuild-less-task.coffee
@@ -15,6 +15,8 @@ module.exports = (grunt) ->
 
     lessCache = new LessCache
       cacheDir: temp.mkdirSync('atom-less-cache')
+      fallbackDir: grunt.config.get('prebuild-less.options.cachePath')
+      syncCaches: true
       resourcePath: path.resolve('.')
 
     bootstrapCss = lessCache.readFileSync(bootstrapLessPath)
@@ -88,6 +90,8 @@ module.exports = (grunt) ->
       grunt.verbose.writeln("Building Less cache for #{configuration.join(', ').yellow}")
       lessCache = new LessCache
         cacheDir: directory
+        fallbackDir: grunt.config.get('prebuild-less.options.cachePath')
+        syncCaches: true
         resourcePath: path.resolve('.')
         importPaths: importPaths
 
@@ -112,4 +116,4 @@ module.exports = (grunt) ->
       cacheMisses += lessCache.stats.misses
       cacheHits += lessCache.stats.hits
 
-    grunt.log.ok(cacheMisses + ' Less files compiled, ' + cacheHits + ' files reused')
+    grunt.log.ok("#{cacheMisses} files compiled, #{cacheHits} files reused")