manifest: move manifest.add onto manifestrevlog

manifest: move manifest.add onto manifestrevlog

This moves add and _addtree onto manifestrevlog. manifestrevlog is responsible
for all serialization decisions, so therefore the add function should live on
it. This will allow us to call add() from manifestlog, which lets us further
break our dependency on manifest.

--- a/mercurial/manifest.py	Tue Sep 20 12:24:01 2016 -0700
+++ b/mercurial/manifest.py	Tue Sep 20 12:24:01 2016 -0700
@@ -946,6 +946,63 @@
                                                     self._dirlogcache)
         return self._dirlogcache[dir]
 
+    def add(self, m, transaction, link, p1, p2, added, removed):
+        if (p1 in self.fulltextcache and util.safehasattr(m, 'fastdelta')
+            and not self._usemanifestv2):
+            # If our first parent is in the manifest cache, we can
+            # compute a delta here using properties we know about the
+            # manifest up-front, which may save time later for the
+            # revlog layer.
+
+            _checkforbidden(added)
+            # combine the changed lists into one sorted iterator
+            work = heapq.merge([(x, False) for x in added],
+                               [(x, True) for x in removed])
+
+            arraytext, deltatext = m.fastdelta(self.fulltextcache[p1], work)
+            cachedelta = self.rev(p1), deltatext
+            text = util.buffer(arraytext)
+            n = self.addrevision(text, transaction, link, p1, p2, cachedelta)
+        else:
+            # The first parent manifest isn't already loaded, so we'll
+            # just encode a fulltext of the manifest and pass that
+            # through to the revlog layer, and let it handle the delta
+            # process.
+            if self._treeondisk:
+                m1 = self.read(p1)
+                m2 = self.read(p2)
+                n = self._addtree(m, transaction, link, m1, m2)
+                arraytext = None
+            else:
+                text = m.text(self._usemanifestv2)
+                n = self.addrevision(text, transaction, link, p1, p2)
+                arraytext = array.array('c', text)
+
+        self.fulltextcache[n] = arraytext
+
+        return n
+
+    def _addtree(self, m, transaction, link, m1, m2):
+        # If the manifest is unchanged compared to one parent,
+        # don't write a new revision
+        if m.unmodifiedsince(m1) or m.unmodifiedsince(m2):
+            return m.node()
+        def writesubtree(subm, subp1, subp2):
+            sublog = self.dirlog(subm.dir())
+            sublog.add(subm, transaction, link, subp1, subp2, None, None)
+        m.writesubtrees(m1, m2, writesubtree)
+        text = m.dirtext(self._usemanifestv2)
+        # Double-check whether contents are unchanged to one parent
+        if text == m1.dirtext(self._usemanifestv2):
+            n = m1.node()
+        elif text == m2.dirtext(self._usemanifestv2):
+            n = m2.node()
+        else:
+            n = self.addrevision(text, transaction, link, m1.node(), m2.node())
+        # Save nodeid so parent manifest can calculate its nodeid
+        m.setnode(n)
+        return n
+
 class manifestlog(object):
     """A collection class representing the collection of manifest snapshots
     referenced by commits in the repository.
@@ -1233,64 +1290,6 @@
         except KeyError:
             return None, None
 
-    def add(self, m, transaction, link, p1, p2, added, removed):
-        if (p1 in self.fulltextcache and util.safehasattr(m, 'fastdelta')
-            and not self._usemanifestv2):
-            # If our first parent is in the manifest cache, we can
-            # compute a delta here using properties we know about the
-            # manifest up-front, which may save time later for the
-            # revlog layer.
-
-            _checkforbidden(added)
-            # combine the changed lists into one sorted iterator
-            work = heapq.merge([(x, False) for x in added],
-                               [(x, True) for x in removed])
-
-            arraytext, deltatext = m.fastdelta(self.fulltextcache[p1], work)
-            cachedelta = self.rev(p1), deltatext
-            text = util.buffer(arraytext)
-            n = self.addrevision(text, transaction, link, p1, p2, cachedelta)
-        else:
-            # The first parent manifest isn't already loaded, so we'll
-            # just encode a fulltext of the manifest and pass that
-            # through to the revlog layer, and let it handle the delta
-            # process.
-            if self._treeondisk:
-                m1 = self.read(p1)
-                m2 = self.read(p2)
-                n = self._addtree(m, transaction, link, m1, m2)
-                arraytext = None
-            else:
-                text = m.text(self._usemanifestv2)
-                n = self.addrevision(text, transaction, link, p1, p2)
-                arraytext = array.array('c', text)
-
-        self._mancache[n] = m
-        self.fulltextcache[n] = arraytext
-
-        return n
-
-    def _addtree(self, m, transaction, link, m1, m2):
-        # If the manifest is unchanged compared to one parent,
-        # don't write a new revision
-        if m.unmodifiedsince(m1) or m.unmodifiedsince(m2):
-            return m.node()
-        def writesubtree(subm, subp1, subp2):
-            sublog = self.dirlog(subm.dir())
-            sublog.add(subm, transaction, link, subp1, subp2, None, None)
-        m.writesubtrees(m1, m2, writesubtree)
-        text = m.dirtext(self._usemanifestv2)
-        # Double-check whether contents are unchanged to one parent
-        if text == m1.dirtext(self._usemanifestv2):
-            n = m1.node()
-        elif text == m2.dirtext(self._usemanifestv2):
-            n = m2.node()
-        else:
-            n = self.addrevision(text, transaction, link, m1.node(), m2.node())
-        # Save nodeid so parent manifest can calculate its nodeid
-        m.setnode(n)
-        return n
-
     def clearcaches(self):
         super(manifest, self).clearcaches()
         self._mancache.clear()