Add SHA-1 based CoffeeScript compile cache

This restores the require cache that was used pre-node integration

package.json

@@ -12,7 +12,6 @@
   "atomShellVersion": "0.4.5",
   "dependencies": {
     "async": "0.2.6",
-    "coffee-cache": "0.1.0",
     "coffee-script": "1.6.2",
     "coffeestack": "0.4.0",
     "first-mate": "0.1.0",

script/cibuild

@@ -5,7 +5,6 @@ set -e
 cd "$(dirname "$0")/.."
 
 rm -rf ~/.atom
-rm -rf /tmp/atom-coffee-cache
 git clean -dff
 
 ./script/bootstrap

src/coffee-cache.coffee

@@ -0,0 +1,24 @@
+crypto = require 'crypto'
+fs = require 'fs'
+path = require 'path'
+
+CoffeeScript = require 'coffee-script'
+mkdir = require('mkdirp').sync
+
+getCachePath = (coffeeContents)->
+  digest = crypto.createHash('sha1').update(coffeeContents, 'utf8').digest('hex')
+  path.join('/tmp/atom-compile-cache/coffee', "#{digest}.coffee")
+
+require.extensions['.coffee'] = (module, filePath) ->
+  coffeeContents = fs.readFileSync(filePath, 'utf8')
+  cachePath = getCachePath(coffeeContents)
+  try
+    jsContents = fs.readFileSync(cachePath, 'utf8') if fs.statSync(cachePath).isFile()
+
+  unless jsContents?
+    jsContents = CoffeeScript.compile(coffeeContents, filename: filePath)
+    try
+      mkdir(path.dirname(cachePath))
+      fs.writeFileSync(cachePath, jsContents)
+
+  module._compile(jsContents, filePath)

src/main.coffee

@@ -44,8 +44,8 @@ delegate.browserMainParts.preMainMessageLoopRun = ->
 
     if args.devMode
       require('coffee-script')
-      require('coffee-cache').setCacheDir('/tmp/atom-coffee-cache')
-      require('module').globalPaths.push(args.resourcePath + "/src")
+      require(path.join(args.resourcePath, 'src', 'coffee-cache'))
+      require('module').globalPaths.push(path.join(args.resourcePath, 'src'))
     else
       appSrcPath = path.resolve(process.argv[0], "../../Resources/app/src")
       require('module').globalPaths.push(appSrcPath)

src/task.coffee

@@ -45,7 +45,7 @@ class Task
   constructor: (taskPath) ->
     bootstrap = """
       require('coffee-script');
-      require('coffee-cache').setCacheDir('/tmp/atom-coffee-cache');
+      require('coffee-cache');
       Object.defineProperty(require.extensions, '.coffee', {
         writable: false,
         value: require.extensions['.coffee']

static/index.html

@@ -8,7 +8,7 @@
       var currentWindow = require('remote').getCurrentWindow();
       try {
         require('coffee-script');
-        require('coffee-cache').setCacheDir('/tmp/atom-coffee-cache');
+        require('coffee-cache');
         Object.defineProperty(require.extensions, '.coffee', {
           writable: false,
           value: require.extensions['.coffee']

tasks/clean-task.coffee

@@ -5,7 +5,7 @@ module.exports = (grunt) ->
 
   grunt.registerTask 'partial-clean', 'Delete some of the build files', ->
     rm grunt.config.get('atom.buildDir')
-    rm '/tmp/atom-coffee-cache'
+    rm '/tmp/atom-compile-cache'
     rm '/tmp/atom-cached-atom-shells'
     rm 'atom-shell'