Relativize buffer paths for replication

TextBuffers now maintain a reference to their containing project to
make it easier to test replication of buffers between environments
without worrying about the value of the `project` global.

We're also starting the process of moving the `git` global into Project
as the `Project.repository` property.

src/app/atom.coffee

@@ -8,6 +8,7 @@ remote = require 'remote'
 crypto = require 'crypto'
 path = require 'path'
 dialog = remote.require 'dialog'
+app = remote.require 'app'
 telepath = require 'telepath'
 
 window.atom =
@@ -224,7 +225,7 @@ window.atom =
     remote.getCurrentWindow().hide()
 
   exit: (status) ->
-    remote.require('app').exit(status)
+    app.exit(status)
 
   toggleFullScreen: ->
     @setFullScreen(!@isFullScreen())
@@ -235,6 +236,9 @@ window.atom =
   isFullScreen: ->
     remote.getCurrentWindow().isFullScreen()
 
+  getHomeDirPath: ->
+    app.getHomeDir()
+
   getWindowStatePath: ->
     switch @windowMode
       when 'config', 'spec'

src/app/editor.coffee

@@ -1,5 +1,5 @@
 {View, $$} = require 'space-pen'
-Buffer = require 'text-buffer'
+TextBuffer = require 'text-buffer'
 Gutter = require 'gutter'
 {Point, Range} = require 'telepath'
 EditSession = require 'edit-session'
@@ -96,7 +96,7 @@ class Editor extends View
       @edit(editSession)
     else if @mini
       @edit(new EditSession
-        buffer: new Buffer()
+        buffer: new TextBuffer
         softWrap: false
         tabLength: 2
         softTabs: true

src/app/git.coffee

@@ -223,6 +223,8 @@ class Git
 
   getConfigValue: (key) -> @getRepo().getConfigValue(key)
 
+  getOriginUrl: -> @getConfigValue('remote.origin.url')
+
   getReferenceTarget: (reference) -> @getRepo().getReferenceTarget(reference)
 
   getAheadBehindCount: (reference) -> @getRepo().getAheadBehindCount(reference)

src/app/project.coffee

@@ -1,14 +1,17 @@
 fsUtils = require 'fs-utils'
 path = require 'path'
+url = require 'url'
+
 _ = require 'underscore'
 $ = require 'jquery'
 telepath = require 'telepath'
 {Range} = telepath
-Buffer = require 'text-buffer'
+TextBuffer = require 'text-buffer'
 EditSession = require 'edit-session'
 EventEmitter = require 'event-emitter'
 Directory = require 'directory'
 BufferedProcess = require 'buffered-process'
+Git = require 'git'
 
 # Public: Represents a project that's opened in Atom.
 #
@@ -43,6 +46,8 @@ class Project
   destroy: ->
     editSession.destroy() for editSession in @getEditSessions()
     buffer.release() for buffer in @getBuffers()
+    window.git?.destroy()
+    delete window.git
 
   ### Public ###
 
@@ -55,9 +60,13 @@ class Project
 
     if pathOrState instanceof telepath.Document
       @state = pathOrState
-      @setPath(pathOrState.get('path'))
+      if projectPath = @state.get('path')
+        @setPath(projectPath)
+      else
+        @setPath(@pathForRepositoryUrl(@state.get('repoUrl')))
+
       @state.get('buffers').each (bufferState) =>
-        if buffer = deserialize(bufferState)
+        if buffer = deserialize(bufferState, project: this)
           @addBuffer(buffer, updateState: false)
     else
       @state = telepath.Document.create(deserializer: @constructor.name, version: @constructor.version, buffers: [])
@@ -69,10 +78,16 @@ class Project
       for removedBuffer in removed
         @removeBufferAtIndex(index, updateState: false)
       for insertedBuffer, i in inserted
-        @addBufferAtIndex(deserialize(insertedBuffer), index + i, updateState: false)
+        @addBufferAtIndex(deserialize(insertedBuffer, project: this), index + i, updateState: false)
+
+  pathForRepositoryUrl: (repoUrl) ->
+    [repoName] = url.parse(repoUrl).path.split('/')[-1..]
+    repoName = repoName.replace(/\.git$/, '')
+    path.join(config.get('core.projectHome'), repoName)
 
   serialize: ->
     state = @state.clone()
+    state.set('path', @getPath())
     state.set('buffers', buffer.serialize() for buffer in @getBuffers())
     state
 
@@ -93,10 +108,15 @@ class Project
     if projectPath?
       directory = if fsUtils.isDirectorySync(projectPath) then projectPath else path.dirname(projectPath)
       @rootDirectory = new Directory(directory)
+      window.git = Git.open(projectPath)
     else
       @rootDirectory = null
+      window.git?.destroy()
+      delete window.git
+
+    if originUrl = window.git?.getOriginUrl()
+      @state.set('repoUrl', originUrl)
 
-    @state.set('path', projectPath)
     @trigger "path-changed"
 
   # Retrieves the name of the root directory.
@@ -246,8 +266,8 @@ class Project
   # text - The {String} text to use as a buffer
   #
   # Returns the {Buffer}.
-  buildBuffer: (filePath, text) ->
-    buffer = new Buffer(filePath, text)
+  buildBuffer: (filePath, initialText) ->
+    buffer = new TextBuffer({project: this, filePath, initialText})
     @addBuffer(buffer)
     @trigger 'buffer-created', buffer
     buffer
@@ -263,7 +283,8 @@ class Project
   #
   # Returns the removed {Buffer}.
   removeBuffer: (buffer) ->
-    @removeBufferAtIndex(@buffers.indexOf(buffer))
+    index = @buffers.indexOf(buffer)
+    @removeBufferAtIndex(index) unless index is -1
 
   removeBufferAtIndex: (index, options={}) ->
     [buffer] = @buffers.splice(index, 1)

src/app/root-view.coffee

@@ -1,3 +1,4 @@
+path = require 'path'
 $ = require 'jquery'
 {$$} = require 'space-pen'
 fsUtils = require 'fs-utils'
@@ -24,6 +25,7 @@ class RootView extends View
     ignoredNames: [".git", ".svn", ".DS_Store"]
     disabledPackages: []
     themes: ['atom-dark-ui', 'atom-dark-syntax']
+    projectHome: path.join(atom.getHomeDirPath(), 'github')
 
   ### Internal ###
   @acceptsDocuments: true

src/app/text-buffer.coffee

@@ -18,8 +18,8 @@ class TextBuffer
   @version: 2
   registerDeserializer(this)
 
-  @deserialize: (state) ->
-    new TextBuffer(state)
+  @deserialize: (state, params) ->
+    new this(state, params)
 
   stoppedChangingDelay: 300
   stoppedChangingTimeout: null
@@ -34,14 +34,15 @@ class TextBuffer
   #
   # path - A {String} representing the file path
   # initialText - A {String} setting the starting text
-  constructor: (args...) ->
-    if args[0] instanceof telepath.Document
-      @state = args[0]
+  constructor: (optionsOrState={}, params={}) ->
+    if optionsOrState instanceof telepath.Document
+      @state = optionsOrState
+      {@project} = params
       @text = @state.get('text')
-      path = @state.get('path')
+      filePath = @state.get('relativePath')
       @id = @state.get('id')
     else
-      [path, initialText] = args
+      {@project, filePath, initialText} = optionsOrState
       @text = telepath.Document.create(initialText, shareStrings: true) if initialText
       @id = guid.create().toString()
       @state = telepath.Document.create
@@ -49,13 +50,13 @@ class TextBuffer
         deserializer: @constructor.name
         version: @constructor.version
 
-    if path
-      @setPath(path)
+    if filePath
+      @setPath(@project.resolve(filePath))
       if @text
         @updateCachedDiskContents()
       else
         @text = telepath.Document.create('', shareStrings: true)
-        @reload() if fsUtils.exists(path)
+        @reload() if fsUtils.exists(filePath)
     else
       @text ?= telepath.Document.create('', shareStrings: true)
 
@@ -148,7 +149,13 @@ class TextBuffer
     @file?.getPath()
 
   getUri: ->
-    project?.relativize(@getPath()) ? @getPath()
+    @getRelativePath()
+
+  getRelativePath: ->
+    @state.get('relativePath')
+
+  setRelativePath: (relativePath) ->
+    @setPath(@project.resolve(relativePath))
 
   # Sets the path for the file.
   #
@@ -160,9 +167,7 @@ class TextBuffer
     @file = new File(path)
     @file.read() if @file.exists()
     @subscribeToFile()
-
-    @state.set('path', path)
-
+    @state.set('relativePath', @project.relativize(path))
     @trigger "path-changed", this
 
   # Retrieves the current buffer's file extension.

src/app/window.coffee

@@ -132,14 +132,10 @@ window.deserializeEditorWindow = ->
 
   $(rootViewParentSelector).append(rootView)
 
-  window.git = Git.open(project.getPath())
   project.on 'path-changed', ->
     projectPath = project.getPath()
     atom.getLoadSettings().initialPath = projectPath
 
-    window.git?.destroy()
-    window.git = Git.open(projectPath)
-
 window.deserializeConfigWindow = ->
   ConfigView = require 'config-view'
   window.configView = deserialize(atom.getWindowState('configView')) ? new ConfigView()
@@ -232,13 +228,13 @@ window.registerDeferredDeserializer = (name, fn) ->
 window.unregisterDeserializer = (klass) ->
   delete deserializers[klass.name]
 
-window.deserialize = (state) ->
+window.deserialize = (state, params) ->
   if deserializer = getDeserializer(state)
     stateVersion = state.get?('version') ? state.version
     return if deserializer.version? and deserializer.version isnt stateVersion
     if (state instanceof telepath.Document) and not deserializer.acceptsDocuments
       state = state.toObject()
-    deserializer.deserialize(state)
+    deserializer.deserialize(state, params)
 
 window.getDeserializer = (state) ->
   return unless state?