Added depth first search for the walk method, added a number of docstrings.

fs/memoryfs.py

@@ -405,13 +405,13 @@ class MemoryFS(FS):
         finally:
             self._lock.release()
 
-    def listdir(self, path="/", wildcard=None, full=False, absolute=False, hidden=False, dirs_only=False, files_only=False):
+    def listdir(self, path="/", wildcard=None, full=False, absolute=False, hidden=True, dirs_only=False, files_only=False):
         self._lock.acquire()
         try:
             dir_entry = self._get_dir_entry(path)
             if dir_entry is None:
                 raise ResourceNotFoundError("NO_DIR", path)
-            paths = dir_entry.contents.keys()            
+            paths = dir_entry.contents.keys()
             return self._listdir_helper(path, paths, wildcard, full, absolute, hidden, dirs_only, files_only)
         finally:
             self._lock.release()

fs/mountfs.py

@@ -82,7 +82,7 @@ class MountFS(FS):
         finally:
             self._lock.release()
 
-    def listdir(self, path="/", wildcard=None, full=False, absolute=False, hidden=False, dirs_only=False, files_only=False):
+    def listdir(self, path="/", wildcard=None, full=False, absolute=False, hidden=True, dirs_only=False, files_only=False):
 
         self._lock.acquire()
         try:

fs/multifs.py

@@ -96,14 +96,13 @@ class MultiFS(FS):
         finally:
             self._lock.release()
 
-    def getsyspath(self, path):
+    def getsyspath(self, path, allow_none=False):
         self._lock.acquire()
         try:
             fs = self._delegate_search(path)
             if fs is not None:
-                return fs.getsyspath(path)
-
-            raise ResourceNotFoundError("NO_FILE", path)
+                return fs.getsyspath(path, allow_none)
+            raise ResourceNotFoundError("NO_RESOURCE", path)
         finally:
             self._lock.release()
 
@@ -111,7 +110,7 @@ class MultiFS(FS):
         self._lock.acquire()
         try:
             if not self.exists(path):
-                raise FSError("NO_RESOURCE", path)
+                raise ResourceNotFoundError("NO_RESOURCE", path)
 
             name, fs = self.which(path)
             if name is None:

fs/osfs.py

@@ -19,7 +19,7 @@ class OSFS(FS):
     def __str__(self):
         return "<OSFS \"%s\">" % self.root_path
 
-    def getsyspath(self, path, default=None):
+    def getsyspath(self, path, allow_none=False):
         sys_path = os.path.join(self.root_path, makerelative(self._resolve(path)))
         return sys_path
 
@@ -127,7 +127,6 @@ class OSFS(FS):
 
     def getsize(self, path):
         sys_path = self.getsyspath(path)
-
         try:
             stats = os.stat(sys_path)
         except OSError, e:
@@ -140,6 +139,11 @@ class OSFS(FS):
 if __name__ == "__main__":
 
     osfs = OSFS("~/projects")
+
+
+    for p in osfs.walk("tagging-trunk", search='depth'):
+        print p
+
     import browsewin
     browsewin.browse(osfs)