Remove duplication of locating Atom Home

static/index.js

@@ -19,7 +19,7 @@
       // Ensure ATOM_HOME is always set before anything else is required
       // This is because of a difference in Linux not inherited between browser and render processes
       // issue #5142
-      setupAtomHome()
+      setupAtomHome(loadSettings.atomHome)
 
       blobStore = FileSystemBlobStore.load(
         path.join(process.env.ATOM_HOME, 'blob-store/')
@@ -69,7 +69,7 @@
 
   function setupWindow (loadSettings) {
     var CompileCache = require('../src/compile-cache')
-    CompileCache.setAtomHomeDirectory(process.env.ATOM_HOME)
+    CompileCache.setAtomHomeDirectory(loadSettings.atomHome)
 
     var ModuleCache = require('../src/module-cache')
     ModuleCache.register(loadSettings)
@@ -92,22 +92,8 @@
     require('ipc').sendChannel('window-command', 'window:loaded')
   }
 
-  function setupAtomHome () {
-    if (!process.env.ATOM_HOME) {
-      var home
-      if (process.platform === 'win32') {
-        home = process.env.USERPROFILE
-      } else {
-        home = process.env.HOME
-      }
-      var atomHome = path.join(home, '.atom')
-      try {
-        atomHome = fs.realpathSync(atomHome)
-      } catch (error) {
-        // Ignore since the path might just not exist yet.
-      }
-      process.env.ATOM_HOME = atomHome
-    }
+  function setupAtomHome (atomHome) {
+    process.env.ATOM_HOME = atomHome
   }
 
   function setupCsonCache (cacheDir) {