# HG changeset patch
# User Durham Goode <durham@fb.com>
# Date 1479165847 28800
# Node ID a1beadaa406116c0266c46064a00003be7de7394
# Parent  a431daa93f8cfdbc3a2d973dec05748209608fba
manifest: change treemanifestctx to construct subtrees from the manifestlog

Previously, treemanifestctx would directly construct its subtrees. By making it
get the subtrees through manifestlog.get() we consolidate all treemanifestctx
creation into manifestlog.get() and therefore extensions that need to wrap
manifestctx creation (like narrow-hg) can intercept manifestctxs at that single
place.

This also means fetching subtrees will take advantage of the manifestlog ctx
cache now, which it did not before.

diff -r a431daa93f8c -r a1beadaa4061 mercurial/manifest.py
--- a/mercurial/manifest.py	Mon Nov 14 15:17:27 2016 -0800
+++ b/mercurial/manifest.py	Mon Nov 14 15:24:07 2016 -0800
@@ -1489,7 +1489,10 @@
                 def gettext():
                     return rl.revision(self._node)
                 def readsubtree(dir, subm):
-                    return treemanifestctx(self._repo, dir, subm).read()
+                    # Set verify to False since we need to be able to create
+                    # subtrees for trees that don't exist on disk.
+                    return self._repo.manifestlog.get(dir, subm,
+                                                      verify=False).read()
                 m.read(gettext, readsubtree)
                 m.setnode(self._node)
                 self._data = m
@@ -1531,7 +1534,7 @@
         else:
             # Need to perform a slow delta
             r0 = revlog.deltaparent(revlog.rev(self._node))
-            m0 = treemanifestctx(self._repo, self._dir, revlog.node(r0)).read()
+            m0 = self._repo.manifestlog.get(self._dir, revlog.node(r0)).read()
             m1 = self.read()
             md = treemanifest(dir=self._dir)
             for f, ((n0, fl0), (n1, fl1)) in m0.diff(m1).iteritems():