--- a/mercurial/filemerge.py	Thu Apr 10 14:25:50 2008 +0200
+++ b/mercurial/filemerge.py	Thu Apr 10 15:02:24 2008 -0500
@@ -5,7 +5,7 @@
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
-from node import nullrev
+from node import nullrev, short
 from i18n import _
 import util, os, tempfile, simplemerge, re, filecmp
 
@@ -99,13 +99,14 @@
             if newdata != data:
                 open(file, "wb").write(newdata)
 
-def filemerge(repo, fw, fd, fo, wctx, mctx):
+def filemerge(repo, mynode, orig, fcd, fco, fca):
     """perform a 3-way merge in the working directory
 
-    fw = original filename in the working directory
-    fd = destination filename in the working directory
-    fo = filename in other parent
-    wctx, mctx = working and merge changecontexts
+    mynode = parent node before merge
+    orig = original local filename before merge
+    fco = other file context
+    fca = ancestor file context
+    fcd = local file context for current/destination file
     """
 
     def temp(prefix, ctx):
@@ -123,23 +124,21 @@
         except IOError:
             return False
 
-    fco = mctx.filectx(fo)
-    if not fco.cmp(wctx.filectx(fd).data()): # files identical?
+    if not fco.cmp(fcd.data()): # files identical?
         return None
 
     ui = repo.ui
-    fcm = wctx.filectx(fw)
-    fca = fcm.ancestor(fco) or repo.filectx(fw, fileid=nullrev)
-    binary = isbin(fcm) or isbin(fco) or isbin(fca)
-    symlink = fcm.islink() or fco.islink()
-    tool, toolpath = _picktool(repo, ui, fw, binary, symlink)
+    fd = fcd.path()
+    binary = isbin(fcd) or isbin(fco) or isbin(fca)
+    symlink = fcd.islink() or fco.islink()
+    tool, toolpath = _picktool(repo, ui, fd, binary, symlink)
     ui.debug(_("picked tool '%s' for %s (binary %s symlink %s)\n") %
-               (tool, fw, binary, symlink))
+               (tool, fd, binary, symlink))
 
     if not tool:
         tool = "internal:local"
         if ui.prompt(_(" no tool found to merge %s\n"
-                       "keep (l)ocal or take (o)ther?") % fw,
+                       "keep (l)ocal or take (o)ther?") % fd,
                      _("[lo]"), _("l")) != _("l"):
             tool = "internal:other"
     if tool == "internal:local":
@@ -158,11 +157,12 @@
     back = a + ".orig"
     util.copyfile(a, back)
 
-    if fw != fo:
-        repo.ui.status(_("merging %s and %s\n") % (fw, fo))
+    if orig != fco.path():
+        repo.ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd))
     else:
-        repo.ui.status(_("merging %s\n") % fw)
-    repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca))
+        repo.ui.status(_("merging %s\n") % fd)
+
+    repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcd, fco, fca))
 
     # do we attempt to simplemerge first?
     if _toolbool(ui, tool, "premerge", not (binary or symlink)):
@@ -176,9 +176,9 @@
         util.copyfile(back, a) # restore from backup and try again
 
     env = dict(HG_FILE=fd,
-               HG_MY_NODE=str(wctx.parents()[0]),
-               HG_OTHER_NODE=str(mctx),
-               HG_MY_ISLINK=fcm.islink(),
+               HG_MY_NODE=short(mynode),
+               HG_OTHER_NODE=str(fco.changectx()),
+               HG_MY_ISLINK=fcd.islink(),
                HG_OTHER_ISLINK=fco.islink(),
                HG_BASE_ISLINK=fca.islink())
 
@@ -194,7 +194,7 @@
         r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env)
 
     if not r and _toolbool(ui, tool, "checkconflicts"):
-        if re.match("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcm.data()):
+        if re.match("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data()):
             r = 1
 
     if not r and _toolbool(ui, tool, "checkchanged"):