# HG changeset patch
# User Tero Marttila <terom@fixme.fi>
# Date 1244232167 -10800
# Node ID 49388e9fd5fa94c5a95bec3e7e703488c1dcd439
# Parent  01220ae43902a7dbcc4d9d0b485f53f2f4ff96db
add open_write method for filesystem.File

diff -r 01220ae43902 -r 49388e9fd5fa degal/filesystem.py
--- a/degal/filesystem.py	Fri Jun 05 23:02:30 2009 +0300
+++ b/degal/filesystem.py	Fri Jun 05 23:02:47 2009 +0300
@@ -349,6 +349,13 @@
         else :
             return open(self.path, mode, bufsize)
 
+    def open_write (self, encoding=None, errors=None, bufsize=None) :
+        """
+            Open for write using open('w').
+        """
+
+        return self.open('w', encoding, errors, bufsize)
+
     def copy_from (self, file) :
         """
             Replace this file with a copy of the given file with default permissions.
@@ -381,14 +388,42 @@
         """
 
         subdir = Directory(self, name=name)
-        
-        # try and mkdir?
+
         if create and not subdir.is_dir() :
             # create it!
             subdir.mkdir()
 
-        return subdir
+        return dir
     
+    def test_subdir (self, name, create=False) :
+        """
+            Test for the presence of a subdir with the given name, and possibly return it, or None.
+
+            Returns a (exists, created, dir) tuple.
+            
+            XXX: ugly, not used
+        """
+
+        subdir = Directory(self, name=name)
+        
+        # already exists?
+        if subdir.is_dir() :
+            if create :
+                # create it!
+                subdir.mkdir()
+                
+                # didn't exist, did create
+                return True, True, subdir
+            
+            else :
+                # doesn't exist, don't create
+                return False, False, subdir
+
+        else :
+            # already existing
+            return True, False, subdir
+
+
     def subfile (self, name) :
         """
             Returns a File object representing the name underneath this dir