Move shell command installation entirely into CommandInstaller

src/command-installer.coffee

@@ -30,14 +30,41 @@ module.exports =
   getInstallDirectory: ->
     "/usr/local/bin"
 
-  install: (commandPath, askForPrivilege, callback) ->
+  installShellCommandsInteractively: ->
+    showErrorDialog = (error) ->
+      atom.confirm
+        message: "Failed to install shell commands"
+        detailedMessage: error.message
+
+    resourcePath = atom.getLoadSettings().resourcePath
+    @installAtomCommand resourcePath, true, (error) =>
+      if error?
+        showErrorDialog(error)
+      else
+        @installApmCommand resourcePath, true, (error) =>
+          if error?
+            showErrorDialog(error)
+          else
+            atom.confirm
+              message: "Commands installed."
+              detailedMessage: "The shell commands `atom` and `apm` are installed."
+
+  installAtomCommand: (resourcePath, askForPrivilege, callback) ->
+    commandPath = path.join(resourcePath, 'atom.sh')
+    @createSymlink commandPath, askForPrivilege, callback
+
+  installApmCommand: (resourcePath, askForPrivilege, callback) ->
+    commandPath = path.join(resourcePath, 'apm', 'node_modules', '.bin', 'apm')
+    @createSymlink commandPath, askForPrivilege, callback
+
+  createSymlink: (commandPath, askForPrivilege, callback) ->
     return unless process.platform is 'darwin'
 
     commandName = path.basename(commandPath, path.extname(commandPath))
     destinationPath = path.join(@getInstallDirectory(), commandName)
 
     fs.readlink destinationPath, (error, realpath) ->
-      if realpath == commandPath
+      if realpath is commandPath
         callback()
         return
 
@@ -49,11 +76,3 @@ module.exports =
           catch error
 
         callback?(error)
-
-  installAtomCommand: (resourcePath, askForPrivilege, callback) ->
-    commandPath = path.join(resourcePath, 'atom.sh')
-    @install commandPath, askForPrivilege, callback
-
-  installApmCommand: (resourcePath, askForPrivilege, callback) ->
-    commandPath = path.join(resourcePath, 'apm', 'node_modules', '.bin', 'apm')
-    @install commandPath, askForPrivilege, callback

src/workspace.coffee

@@ -102,24 +102,7 @@ class Workspace extends Model
     @emit 'editor-created', editor
 
   installShellCommands: ->
-    showErrorDialog = (error) ->
-      installDirectory = CommandInstaller.getInstallDirectory()
-      atom.confirm
-        message: "Failed to install shell commands"
-        detailedMessage: error.message
-
-    resourcePath = atom.getLoadSettings().resourcePath
-    CommandInstaller.installAtomCommand resourcePath, true, (error) ->
-      if error?
-        showErrorDialog(error)
-      else
-        CommandInstaller.installApmCommand resourcePath, true, (error) ->
-          if error?
-            showErrorDialog(error)
-          else
-            atom.confirm
-              message: "Commands installed."
-              detailedMessage: "The shell commands `atom` and `apm` are installed."
+    CommandInstaller.installShellCommandsInteractively()
 
   subscribeToActiveItem: ->
     @updateWindowTitle()