$ cat <<EOF >> $HGRCPATH

  > [extensions]

  > notify=

  > 

  > [hooks]

  > changegroup.notify = python:hgext.notify.hook

  > 

  > [notify]

  > sources = push

  > diffstat = False

  > maxsubject = 10

  > 

  > [usersubs]

  > foo@bar = *

  > 

  > [reposubs]

  > * = baz

  > EOF

  $ hg init a

clone

  $ hg --traceback clone a b

  updating to branch default

  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo a > b/a

commit

  $ hg --traceback --cwd b commit -Ama

  adding a

  $ echo a >> b/a

commit

  $ hg --traceback --cwd b commit -Amb

push

  $ hg --traceback --cwd b push ../a 2>&1 |

  >     python -c 'import sys,re; print re.sub("\n\t", " ", sys.stdin.read()),'

  pushing to ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 2 changesets with 2 changes to 1 files

  Content-Type: text/plain; charset="us-ascii"

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  Date: * (glob)

  Subject: * (glob)

  From: test

  X-Hg-Notification: changeset cb9a9f314b8b

  Message-Id: <*> (glob)

  To: baz, foo@bar

  changeset cb9a9f314b8b in $TESTTMP/a

  details: $TESTTMP/a?cmd=changeset;node=cb9a9f314b8b

  summary: a

  changeset ba677d0156c1 in $TESTTMP/a

  details: $TESTTMP/a?cmd=changeset;node=ba677d0156c1

  summary: b

  diffs (6 lines):

  diff -r 000000000000 -r ba677d0156c1 a

  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

  +++ b/a	Thu Jan 01 00:00:00 1970 +0000

  @@ -0,0 +1,2 @@

  +a

  +a