Serialize grammar overrides for paths

src/app/language-mode.coffee

@@ -48,7 +48,10 @@ class LanguageMode
         false
 
   reloadGrammar: ->
-    @grammar = rootView.project.grammarForFilePath(@buffer.getPath())
+    if @buffer.project?
+      @grammar = @buffer.project.grammarForFilePath(@buffer.getPath())
+    else
+      @grammar = syntax.grammarForFilePath(@buffer.getPath())
 
   isQuote: (string) ->
     /'|"/.test(string)

src/app/project.coffee

@@ -11,6 +11,10 @@ Git = require 'git'
 
 module.exports =
 class Project
+
+  @deserialize: (state) ->
+    new Project(state.path, state.grammarOverridesByPath)
+
   tabLength: 2
   autoIndent: true
   softTabs: true
@@ -18,13 +22,17 @@ class Project
   rootDirectory: null
   editSessions: null
   ignoredPathRegexes: null
-  grammarOverridesByPath: {}
+  grammarOverridesByPath: null
 
-  constructor: (path) ->
+  constructor: (path, @grammarOverridesByPath={}) ->
     @setPath(path)
     @editSessions = []
     @buffers = []
 
+  serialize: ->
+    path: @getPath()
+    grammarOverridesByPath: @grammarOverridesByPath
+
   destroy: ->
     editSession.destroy() for editSession in @getEditSessions()
 
@@ -34,9 +42,11 @@ class Project
   removeGrammarOverrideForPath: (path) ->
     delete @grammarOverridesByPath[path]
 
+  grammarOverrideForPath: (path) ->
+    syntax.grammarForScopeName(@grammarOverridesByPath[path])
+
   grammarForFilePath: (path) ->
-    grammar = syntax.grammarForScopeName(@grammarOverridesByPath[path]) if path
-    grammar or syntax.grammarForFilePath(path)
+    @grammarOverrideForPath(path) or syntax.grammarForFilePath(path)
 
   getPath: ->
     @rootDirectory?.path

src/app/root-view.coffee

@@ -23,8 +23,9 @@ class RootView extends View
         @div id: 'vertical', outlet: 'vertical', =>
           @div id: 'panes', outlet: 'panes'
 
-  @deserialize: ({ projectPath, panesViewState, packageStates }) ->
-    rootView = new RootView(projectPath, packageStates: packageStates, suppressOpen: true)
+  @deserialize: ({ projectState, panesViewState, packageStates }) ->
+    project = Project.deserialize(projectState) if projectState
+    rootView = new RootView(project, packageStates: packageStates, suppressOpen: true)
     rootView.setRootPane(rootView.deserializeView(panesViewState)) if panesViewState
     rootView
 
@@ -32,11 +33,16 @@ class RootView extends View
   packageStates: null
   title: null
 
-  initialize: (pathToOpen, { @packageStates, suppressOpen } = {}) ->
+  initialize: (projectOrPathToOpen, { @packageStates, suppressOpen } = {}) ->
     window.rootView = this
     @packageStates ?= {}
     @packageModules = {}
-    @project = new Project(pathToOpen)
+
+    if not projectOrPathToOpen or _.isString(projectOrPathToOpen)
+      pathToOpen = projectOrPathToOpen
+      @project = new Project(projectOrPathToOpen)
+    else
+      @project = projectOrPathToOpen
 
     config.load()
 
@@ -48,7 +54,7 @@ class RootView extends View
       @open()
 
   serialize: ->
-    projectPath: @project?.getPath()
+    projectState: @project?.serialize()
     panesViewState: @panes.children().view()?.serialize()
     packageStates: @serializePackages()