Hook fixups

Pass the first new changeset node to the changegroup hook
Call commit for each changeset in a pull changegroup
Improve hook docs

doc/hgrc.5.txt

@@ -122,10 +122,12 hooks::
   Commands that get automatically executed by various actions such as
   starting or finishing a commit.
   changegroup;;
-    Run after a changegroup has been added via push or pull.
+    Run after a changegroup has been added via push or pull. Passed
+    the ID of the first new changeset in $NODE.
   commit;;
-    Run after a changeset has been created. Passed the ID of the newly
-    created changeset.
+    Run after a changeset has been created or for each changeset
+    pulled. Passed the ID of the newly created changeset in
+    environment variable $NODE.
   precommit;;
     Run before starting a commit.  Exit status 0 allows the commit to
     proceed.  Non-zero status will cause the commit to fail.

mercurial/localrepo.py

@@ -987,7 +987,8 class localrepository:
         self.ui.status("adding changesets\n")
         co = self.changelog.tip()
         cn = self.changelog.addgroup(getgroup(), csmap, tr, 1) # unique
-        changesets = self.changelog.rev(cn) - self.changelog.rev(co)
+        cnr, cor = map(self.changelog.rev, (cn, co))
+        changesets = cnr - cor
 
         # pull off the manifest group
         self.ui.status("adding manifests\n")
@@ -1017,9 +1018,13 class localrepository:
 
         tr.close()
 
-        if not self.hook("changegroup"):
+        if not self.hook("changegroup", node=hex(self.changelog.node(cor+1))):
+            self.ui.warn("abort: changegroup hook returned failure!\n")
             return 1
 
+        for i in range(cor + 1, cnr + 1):
+            self.hook("commit", node=hex(self.changelog.node(i)))
+
         return
 
     def update(self, node, allow=False, force=False, choose=None,