[PATCH 2 of 7] manifest: remove manifest.find

[Durham Goode]

# HG changeset patch
# User Durham Goode <durham at fb.com>
# Date 1478621023 28800
#      Tue Nov 08 08:03:43 2016 -0800
# Node ID 734fe516a6a23c43bfb56543e8e12b419b715b8d
# Parent  b47bc9c8aaa603f0e143f9103dc6985f5678c818
manifest: remove manifest.find

As part of removing dependencies on manifest, this drops the find function and
fixes up the two existing callers to use the equivalent apis on manifestctx.

diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -2566,11 +2566,14 @@ def cat(ui, repo, ctx, matcher, prefix, 
     # for performance to avoid the cost of parsing the manifest.
     if len(matcher.files()) == 1 and not matcher.anypats():
         file = matcher.files()[0]
-        mf = repo.manifest
+        mfl = repo.manifestlog
         mfnode = ctx.manifestnode()
-        if mfnode and mf.find(mfnode, file)[0]:
-            write(file)
-            return 0
+        try:
+            if mfnode and mfl[mfnode].find(file)[0]:
+                write(file)
+                return 0
+        except KeyError:
+            pass
 
     for abs in ctx.walk(matcher):
         write(abs)
diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -259,8 +259,10 @@ class basectx(object):
             if path in self._manifestdelta:
                 return (self._manifestdelta[path],
                         self._manifestdelta.flags(path))
-        node, flag = self._repo.manifest.find(self._changeset.manifest, path)
-        if not node:
+        mfl = self._repo.manifestlog
+        try:
+            node, flag = mfl[self._changeset.manifest].find(path)
+        except KeyError:
             raise error.ManifestLookupError(self._node, path,
                                             _('not found in manifest'))
 
diff --git a/mercurial/manifest.py b/mercurial/manifest.py
--- a/mercurial/manifest.py
+++ b/mercurial/manifest.py
@@ -1389,6 +1389,9 @@ class manifestctx(object):
         d = mdiff.patchtext(revlog.revdiff(revlog.deltaparent(r), r))
         return manifestdict(d)
 
+    def find(self, key):
+        return self.read().find(key)
+
 class treemanifestctx(object):
     def __init__(self, repo, dir, node):
         self._repo = repo
@@ -1481,6 +1484,9 @@ class treemanifestctx(object):
         else:
             return self.read()
 
+    def find(self, key):
+        return self.read().find(key)
+
 class manifest(manifestrevlog):
     def __init__(self, opener, dir='', dirlogcache=None):
         '''The 'dir' and 'dirlogcache' arguments are for internal use by
@@ -1543,15 +1549,6 @@ class manifest(manifestrevlog):
             self.fulltextcache[node] = arraytext
         return m
 
-    def find(self, node, f):
-        '''look up entry for a single file efficiently.
-        return (node, flags) pair if found, (None, None) if not.'''
-        m = self.read(node)
-        try:
-            return m.find(f)
-        except KeyError:
-            return None, None
-
     def clearcaches(self):
         super(manifest, self).clearcaches()
         self._mancache.clear()