[PATCH 3 of 4] context: remove unused filectx.ancestor

Mads Kiilerich mads at kiilerich.com
Mon Feb 24 22:50:28 CST 2014


# HG changeset patch
# User Mads Kiilerich <madski at unity3d.com>
# Date 1393303803 -3600
#      Tue Feb 25 05:50:03 2014 +0100
# Node ID 713a6976878ebc6405bc7578685ec93b2513a8d5
# Parent  252fe2a2bcab6c32d1ccae258577b54500b043f6
context: remove unused filectx.ancestor

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -7,7 +7,7 @@
 
 from node import nullid, nullrev, short, hex, bin
 from i18n import _
-import ancestor, mdiff, error, util, scmutil, subrepo, patch, encoding, phases
+import mdiff, error, util, scmutil, subrepo, patch, encoding, phases
 import match as matchmod
 import os, errno, stat
 import obsolete as obsmod
@@ -688,55 +688,6 @@ class basefilectx(object):
 
         return zip(hist[base][0], hist[base][1].splitlines(True))
 
-    def ancestor(self, fc2, actx):
-        """
-        find the common ancestor file context, if any, of self, and fc2
-
-        actx must be the changectx of the common ancestor
-        of self's and fc2's respective changesets.
-        """
-
-        # the easy case: no (relevant) renames
-        if fc2.path() == self.path() and self.path() in actx:
-            return actx[self.path()]
-
-        # the next easiest cases: unambiguous predecessor (name trumps
-        # history)
-        if self.path() in actx and fc2.path() not in actx:
-            return actx[self.path()]
-        if fc2.path() in actx and self.path() not in actx:
-            return actx[fc2.path()]
-
-        # prime the ancestor cache for the working directory
-        acache = {}
-        for c in (self, fc2):
-            if c.filenode() is None:
-                pl = [(n.path(), n.filenode()) for n in c.parents()]
-                acache[(c._path, None)] = pl
-
-        flcache = {self._repopath:self._filelog, fc2._repopath:fc2._filelog}
-        def parents(vertex):
-            if vertex in acache:
-                return acache[vertex]
-            f, n = vertex
-            if f not in flcache:
-                flcache[f] = self._repo.file(f)
-            fl = flcache[f]
-            pl = [(f, p) for p in fl.parents(n) if p != nullid]
-            re = fl.renamed(n)
-            if re:
-                pl.append(re)
-            acache[vertex] = pl
-            return pl
-
-        a, b = (self._path, self._filenode), (fc2._path, fc2._filenode)
-        v = ancestor.genericancestor(a, b, parents)
-        if v:
-            f, n = v
-            return filectx(self._repo, f, fileid=n, filelog=flcache[f])
-
-        return None
-
     def ancestors(self, followfirst=False):
         visit = {}
         c = self


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