Index: Lib/dospath.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/dospath.py,v
retrieving revision 1.13
diff -c -r1.13 dospath.py
*** Lib/dospath.py	2000/07/01 10:52:49	1.13
--- Lib/dospath.py	2000/07/12 00:19:29
***************
*** 102,119 ****
      return split(p)[0]
  
  
! def commonprefix(m):
!     """Return the longest prefix of all list elements."""
  
      if not m: return ''
!     prefix = m[0]
!     for item in m:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return prefix
  
  
  # Get size, mtime, atime of files.
--- 102,127 ----
      return split(p)[0]
  
  
! # Return the longest prefix of all list elements.
  
+ def commonprefix(m):
+     "Given a list of pathnames, returns the longest common leading component"
      if not m: return ''
!     n = m[:]
!     for i in range(len(n)):
!         n[i] = n[i].split(os.sep)
!         # if os.sep didn't have any effect, try os.altsep
!         if os.altsep and len(n[i]) == 1:
!             n[i] = n[i].split(os.altsep)
!             
!     prefix = n[0]
!     for item in n:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return os.sep.join(prefix)
  
  
  # Get size, mtime, atime of files.
Index: Lib/macpath.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/macpath.py,v
retrieving revision 1.22
diff -c -r1.22 macpath.py
*** Lib/macpath.py	2000/07/01 10:52:26	1.22
--- Lib/macpath.py	2000/07/12 00:19:29
***************
*** 89,94 ****
--- 89,117 ----
  def basename(s): return split(s)[1]
  
  
+ # Return the longest prefix of all list elements.
+ # XXX completely untested on Mac!!!
+ 
+ def commonprefix(m):
+     "Given a list of pathnames, returns the longest common leading component"
+     if not m: return ''
+     n = m[:]
+     for i in range(len(n)):
+         n[i] = n[i].split(os.sep)
+         # if os.sep didn't have any effect, try os.altsep
+         if os.altsep and len(n[i]) == 1:
+             n[i] = n[i].split(os.altsep)
+             
+     prefix = n[0]
+     for item in n:
+         for i in range(len(prefix)):
+             if prefix[:i+1] <> item[:i+1]:
+                 prefix = prefix[:i]
+                 if i == 0: return ''
+                 break
+     return os.sep.join(prefix)
+ 
+ 
  def isdir(s):
      """Return true if the pathname refers to an existing directory."""
  
Index: Lib/ntpath.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/ntpath.py,v
retrieving revision 1.24
diff -c -r1.24 ntpath.py
*** Lib/ntpath.py	2000/07/01 06:36:51	1.24
--- Lib/ntpath.py	2000/07/12 00:19:30
***************
*** 8,15 ****
  import os
  import stat
  import string
  
- 
  # Normalize the case of a pathname and map slashes to backslashes.
  # Other normalizations (such as optimizing '../' away) are not done
  # (this is done by normpath).
--- 8,15 ----
  import os
  import stat
  import string
+ import copy
  
  # Normalize the case of a pathname and map slashes to backslashes.
  # Other normalizations (such as optimizing '../' away) are not done
  # (this is done by normpath).
***************
*** 158,171 ****
  def commonprefix(m):
      "Given a list of pathnames, returns the longest common leading component"
      if not m: return ''
!     prefix = m[0]
!     for item in m:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return prefix
  
  
  # Get size, mtime, atime of files.
--- 158,174 ----
  def commonprefix(m):
      "Given a list of pathnames, returns the longest common leading component"
      if not m: return ''
!     n = copy.copy(m)
!     for i in range(len(n)):
!         n[i] = n[i].split(os.sep)
!     prefix = n[0]
!     for item in n:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return os.sep.join(prefix)
  
  
  # Get size, mtime, atime of files.
Index: Lib/posixpath.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/posixpath.py,v
retrieving revision 1.31
diff -c -r1.31 posixpath.py
*** Lib/posixpath.py	2000/06/28 14:48:01	1.31
--- Lib/posixpath.py	2000/07/12 00:19:30
***************
*** 118,131 ****
  def commonprefix(m):
      "Given a list of pathnames, returns the longest common leading component"
      if not m: return ''
!     prefix = m[0]
!     for item in m:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return prefix
  
  
  # Get size, mtime, atime of files.
--- 118,138 ----
  def commonprefix(m):
      "Given a list of pathnames, returns the longest common leading component"
      if not m: return ''
!     n = m[:]
!     for i in range(len(n)):
!         n[i] = n[i].split(os.sep)
!         # if os.sep didn't have any effect, try os.altsep
!         if os.altsep and len(n[i]) == 1:
!             n[i] = n[i].split(os.altsep)
!             
!     prefix = n[0]
!     for item in n:
          for i in range(len(prefix)):
              if prefix[:i+1] <> item[:i+1]:
                  prefix = prefix[:i]
                  if i == 0: return ''
                  break
!     return os.sep.join(prefix)
  
  
  # Get size, mtime, atime of files.