Merge pull request #13754 from hron/normalize-disk-drive-letter

Normalize disk drive letter in path on Windows

src/default-directory-provider.coffee

@@ -15,7 +15,7 @@ class DefaultDirectoryProvider
   # * {Directory} if the given URI is compatible with this provider.
   # * `null` if the given URI is not compatibile with this provider.
   directoryForURISync: (uri) ->
-    normalizedPath = path.normalize(uri)
+    normalizedPath = @normalizePath(uri)
     {host} = url.parse(uri)
     directoryPath = if host
       uri
@@ -42,3 +42,17 @@ class DefaultDirectoryProvider
   # * `null` if the given URI is not compatibile with this provider.
   directoryForURI: (uri) ->
     Promise.resolve(@directoryForURISync(uri))
+
+  # Public: Normalizes path.
+  #
+  # * `uri` {String} The path that should be normalized.
+  #
+  # Returns a {String} with normalized path.
+  normalizePath: (uri) ->
+    # Normalize disk drive letter on Windows to avoid opening two buffers for the same file
+    pathWithNormalizedDiskDriveLetter =
+      if process.platform is 'win32' and matchData = uri.match(/^([a-z]):/)
+        "#{matchData[1].toUpperCase()}#{uri.slice(1)}"
+      else
+        uri
+    path.normalize(pathWithNormalizedDiskDriveLetter)

src/project.coffee

@@ -209,7 +209,7 @@ class Project extends Model
   removePath: (projectPath) ->
     # The projectPath may be a URI, in which case it should not be normalized.
     unless projectPath in @getPaths()
-      projectPath = path.normalize(projectPath)
+      projectPath = @defaultDirectoryProvider.normalizePath(projectPath)
 
     indexToRemove = null
     for directory, i in @rootDirectories
@@ -237,11 +237,10 @@ class Project extends Model
       uri
     else
       if fs.isAbsolute(uri)
-        path.normalize(fs.resolveHome(uri))
-
+        @defaultDirectoryProvider.normalizePath(fs.resolveHome(uri))
       # TODO: what should we do here when there are multiple directories?
       else if projectPath = @getPaths()[0]
-        path.normalize(fs.resolveHome(path.join(projectPath, uri)))
+        @defaultDirectoryProvider.normalizePath(fs.resolveHome(path.join(projectPath, uri)))
       else
         undefined