Support symlinks in .relativize() and .contains()

spec/app/directory-spec.coffee

@@ -74,3 +74,35 @@ describe "Directory", ->
         expect(entry.symlink).toBeTruthy()
       else
         expect(entry.symlink).toBeFalsy()
+
+  describe ".relativize(path)", ->
+    it "returns a relative path based on the directory's path", ->
+      absolutePath = directory.getPath()
+      expect(directory.relativize(path.join(absolutePath, "b"))).toBe "b"
+      expect(directory.relativize(path.join(absolutePath, "b/file.coffee"))).toBe "b/file.coffee"
+      expect(directory.relativize(path.join(absolutePath, "file.coffee"))).toBe "file.coffee"
+
+    it "returns a relative path based on the directory's symlinked source path", ->
+      symlinkPath = path.join(fsUtils.resolveOnLoadPath('fixtures'), 'symlink-to-dir')
+      symlinkDirectory = new Directory(symlinkPath)
+      realFilePath = fsUtils.resolveOnLoadPath('fixtures/dir/a')
+      expect(symlinkDirectory.relativize(realFilePath)).toBe 'a'
+
+    it "returns the full path if the directory's path is not a prefix of the path", ->
+      expect(directory.relativize('/not/relative')).toBe '/not/relative'
+
+  describe ".contains(path)", ->
+    it "returns true if the path is a child of the directory's path", ->
+      absolutePath = directory.getPath()
+      expect(directory.contains(path.join(absolutePath, "b"))).toBe true
+      expect(directory.contains(path.join(absolutePath, "b/file.coffee"))).toBe true
+      expect(directory.contains(path.join(absolutePath, "file.coffee"))).toBe true
+
+    it "returns true if the path is a child of the directory's symlinked source path", ->
+      symlinkPath = path.join(fsUtils.resolveOnLoadPath('fixtures'), 'symlink-to-dir')
+      symlinkDirectory = new Directory(symlinkPath)
+      realFilePath = fsUtils.resolveOnLoadPath('fixtures/dir/a')
+      expect(symlinkDirectory.contains(realFilePath)).toBe true
+
+    it "returns false if the directory's path is not a prefix of the path", ->
+      expect(directory.contains('/not/relative')).toBe false

spec/app/project-spec.coffee

@@ -111,13 +111,6 @@ describe "Project", ->
       it "does not modify uris that begin with a scheme", ->
         expect(project.resolve('http://zombo.com')).toBe 'http://zombo.com'
 
-  describe ".relativize(path)", ->
-    it "returns an relative path based on the project's root", ->
-      absolutePath = fsUtils.resolveOnLoadPath('fixtures/dir')
-      expect(project.relativize(path.join(absolutePath, "b"))).toBe "b"
-      expect(project.relativize(path.join(absolutePath, "b/file.coffee"))).toBe "b/file.coffee"
-      expect(project.relativize(path.join(absolutePath, "file.coffee"))).toBe "file.coffee"
-
   describe ".setPath(path)", ->
     describe "when path is a file", ->
       it "sets its path to the files parent directory and updates the root directory", ->

src/app/directory.coffee

@@ -12,6 +12,7 @@ EventEmitter = require 'event-emitter'
 module.exports =
 class Directory
   path: null
+  realPath: null
 
   ### Public ###
 
@@ -32,6 +33,43 @@ class Directory
   # Returns a {String}.
   getPath: -> @path
 
+  # Retrieves this directory's real path.
+  #
+  # Returns a {String}.
+  getRealPath: ->
+    unless @realPath?
+      try
+        @realPath = fs.realpathSync(@path)
+      catch e
+        @realPath = @path
+    @realPath
+
+  # Is the given path inside this directory?
+  #
+  # pathToCheck - the {String} path to check.
+  #
+  # Returns a {Boolean}.
+  contains: (pathToCheck='') ->
+    if pathToCheck.indexOf(path.join(@getPath(), path.sep)) is 0
+      true
+    else if pathToCheck.indexOf(path.join(@getRealPath(), path.sep)) is 0
+      true
+    else
+      false
+
+  # Make a full path relative to this directory's path.
+  #
+  # fullPath - The {String} path to convert.
+  #
+  # Returns a {String}.
+  relativize: (fullPath='') ->
+    if fullPath.indexOf(path.join(@getPath(), path.sep)) is 0
+      fullPath.substring(@getPath().length + 1)
+    else if fullPath.indexOf(path.join(@getRealPath(), path.sep)) is 0
+      fullPath.substring(@getRealPath().length + 1)
+    else
+      fullPath
+
   # Retrieves the file entries in the directory.
   #
   # This does follow symlinks.

src/app/project.coffee

@@ -122,8 +122,7 @@ class Project
   #
   # Returns a {String}.
   relativize: (fullPath) ->
-    return fullPath unless fullPath.lastIndexOf(@getPath()) is 0
-    fullPath.replace(@getPath(), "").replace(/^\//, '')
+    @rootDirectory?.relativize(fullPath) ? fullPath
 
   # Is the given path inside this project?
   #
@@ -131,10 +130,7 @@ class Project
   #
   # Returns a {Boolean}.
   contains: (pathToCheck) ->
-    if pathToCheck
-      if projectPath = @getPath()
-        return pathToCheck.indexOf(path.join(projectPath, path.sep)) is 0
-    false
+    @rootDirectory?.contains(pathToCheck) ? false
 
   # Identifies if the project is using soft tabs.
   #