Post a notification when the user cannot access a file

spec/workspace-spec.coffee

@@ -297,6 +297,26 @@ describe "Workspace", ->
             expect(notification.getMessage()).toContain 'No such file'
             expect(notification.getMessage()).toContain 'not-a-file.md'
 
+      describe "when the user does not have access to the file", ->
+        beforeEach ->
+          spyOn(fs, 'openSync').andCallFake (path)->
+            error = new Error("EACCES, permission denied '#{path}'")
+            error.path = path
+            error.code = 'EACCES'
+            throw error
+
+        it "creates a notification", ->
+          waitsForPromise ->
+            workspace.open('file1', workspace.getActivePane())
+
+          runs ->
+            expect(notificationSpy).toHaveBeenCalled()
+            notification = notificationSpy.mostRecentCall.args[0]
+            expect(notification.getType()).toBe 'warning'
+            expect(notification.getMessage()).toContain 'Permission denied'
+            expect(notification.getMessage()).toContain 'file1'
+
+
   describe "::reopenItem()", ->
     it "opens the uri associated with the last closed pane that isn't currently open", ->
       pane = workspace.getActivePane()

src/project.coffee

@@ -218,6 +218,11 @@ class Project extends Model
   # Returns a promise that resolves to an {TextEditor}.
   open: (filePath, options={}) ->
     filePath = @resolvePath(filePath)
+
+    # Make sure we have permissions
+    fileDescriptor = fs.openSync(filePath, 'r+')
+    fs.closeSync(fileDescriptor)
+
     @bufferForPath(filePath).then (buffer) =>
       @buildEditorForBuffer(buffer, options)
 

src/workspace.coffee

@@ -455,6 +455,8 @@ class Workspace extends Model
         atom.notifications.addWarning(error.message)
       else if error.code is 'ENOENT' and error.path?
         atom.notifications.addWarning("No such file '#{error.path}'")
+      else if error.code is 'EACCES' and error.path?
+        atom.notifications.addWarning("Permission denied '#{error.path}'")
       return Q()
 
     Q(item)