$ cat <<EOF >> $HGRCPATH

  > [extensions]

  > notify=

  > 

  > [hooks]

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

  > 

  > [notify]

  > sources = pull

  > diffstat = False

  > 

  > [usersubs]

  > foo@bar = *

  > 

  > [reposubs]

  > * = baz

  > EOF

  $ hg help notify

  notify extension - hooks for sending email push notifications

  This extension let you run hooks sending email notifications when changesets

  are being pushed, from the sending or receiving side.

  First, enable the extension as explained in "hg help extensions", and register

  the hook you want to run. "incoming" and "outgoing" hooks are run by the

  changesets receiver while the "outgoing" one is for the sender:

    [hooks]

    # one email for each incoming changeset

    incoming.notify = python:hgext.notify.hook

    # one email for all incoming changesets

    changegroup.notify = python:hgext.notify.hook

    # one email for all outgoing changesets

    outgoing.notify = python:hgext.notify.hook

  Now the hooks are running, subscribers must be assigned to repositories. Use

  the "[usersubs]" section to map repositories to a given email or the

  "[reposubs]" section to map emails to a single repository:

    [usersubs]

    # key is subscriber email, value is a comma-separated list of glob

    # patterns

    user@host = pattern

    [reposubs]

    # key is glob pattern, value is a comma-separated list of subscriber

    # emails

    pattern = user@host

  Glob patterns are matched against absolute path to repository root. The

  subscriptions can be defined in their own file and referenced with:

    [notify]

    config = /path/to/subscriptionsfile

  Alternatively, they can be added to Mercurial configuration files by setting

  the previous entry to an empty value.

  At this point, notifications should be generated but will not be sent until

  you set the "notify.test" entry to "False".

  Notifications content can be tweaked with the following configuration entries:

  notify.test

    If "True", print messages to stdout instead of sending them. Default: True.

  notify.sources

    Space separated list of change sources. Notifications are sent only if it

    includes the incoming or outgoing changes source. Incoming sources can be

    "serve" for changes coming from http or ssh, "pull" for pulled changes,

    "unbundle" for changes added by "hg unbundle" or "push" for changes being

    pushed locally. Outgoing sources are the same except for "unbundle" which is

    replaced by "bundle". Default: serve.

  notify.strip

    Number of leading slashes to strip from url paths. By default, notifications

    references repositories with their absolute path. "notify.strip" let you

    turn them into relative paths. For example, "notify.strip=3" will change

    "/long/path/repository" into "repository". Default: 0.

  notify.domain

    If subscribers emails or the from email have no domain set, complete them

    with this value.

  notify.style

    Style file to use when formatting emails.

  notify.template

    Template to use when formatting emails.

  notify.incoming

    Template to use when run as incoming hook, override "notify.template".

  notify.outgoing

    Template to use when run as outgoing hook, override "notify.template".

  notify.changegroup

    Template to use when running as changegroup hook, override

    "notify.template".

  notify.maxdiff

    Maximum number of diff lines to include in notification email. Set to 0 to

    disable the diff, -1 to include all of it. Default: 300.

  notify.maxsubject

    Maximum number of characters in emails subject line. Default: 67.

  notify.diffstat

    Set to True to include a diffstat before diff content. Default: True.

  notify.merge

    If True, send notifications for merge changesets. Default: True.

  If set, the following entries will also be used to customize the

  notifications:

  email.from

    Email "From" address to use if none can be found in generated email content.

  web.baseurl

    Root repository browsing URL to combine with repository paths when making

    references. See also "notify.strip".

  no commands defined

  $ hg init a

  $ echo a > a/a

commit

  $ hg --cwd a commit -Ama -d '0 0'

  adding a

clone

  $ hg --traceback clone a b

  updating to branch default

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

  $ echo a >> a/a

commit

  $ hg --traceback --cwd a commit -Amb -d '1 0'

on Mac OS X 10.5 the tmp path is very long so would get stripped in the subject line

  $ cat <<EOF >> $HGRCPATH

  > [notify]

  > maxsubject = 200

  > EOF

the python call below wraps continuation lines, which appear on Mac OS X 10.5 because

of the very long subject line

pull (minimal config)

  $ hg --traceback --cwd b pull ../a | \

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

  pulling from ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  Date: * (glob)

  Subject: changeset in $TESTTMP/b: b

  From: test

  X-Hg-Notification: changeset 0647d048b600

  Message-Id: <*> (glob)

  To: baz, foo@bar

  changeset 0647d048b600 in $TESTTMP/b

  details: $TESTTMP/b?cmd=changeset;node=0647d048b600

  description: b

  diffs (6 lines):

  diff -r cb9a9f314b8b -r 0647d048b600 a

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

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

  @@ -1,1 +1,2 @@ a

  +a

  (run 'hg update' to get a working copy)

  $ cat <<EOF >> $HGRCPATH

  > [notify]

  > config = `pwd`/.notify.conf

  > domain = test.com

  > strip = 42

  > template = Subject: {desc|firstline|strip}\nFrom: {author}\nX-Test: foo\n\nchangeset {node|short} in {webroot}\ndescription:\n\t{desc|tabindent|strip}

  > 

  > [web]

  > baseurl = http://test/

  > EOF

fail for config file is missing

  $ hg --cwd b rollback

  repository tip rolled back to revision 0 (undo pull)

  $ hg --cwd b pull ../a 2>&1 | grep 'error.*\.notify\.conf' > /dev/null && echo pull failed

  pull failed

  $ touch ".notify.conf"

pull

  $ hg --cwd b rollback

  repository tip rolled back to revision 0 (undo pull)

  $ hg --traceback --cwd b pull ../a  | \

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

  pulling from ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  X-Test: foo

  Date: * (glob)

  Subject: b

  From: test@test.com

  X-Hg-Notification: changeset 0647d048b600

  Message-Id: <*> (glob)

  To: baz@test.com, foo@bar

  changeset 0647d048b600 in b

  description: b

  diffs (6 lines):

  diff -r cb9a9f314b8b -r 0647d048b600 a

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

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

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

   a

  +a

  (run 'hg update' to get a working copy)

  $ cat << EOF >> $HGRCPATH

  > [hooks]

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

  > 

  > [notify]

  > sources = pull

  > diffstat = True

  > EOF

pull

  $ hg --cwd b rollback

  repository tip rolled back to revision 0 (undo pull)

  $ hg --traceback --cwd b pull ../a | \

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

  pulling from ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  X-Test: foo

  Date: * (glob)

  Subject: b

  From: test@test.com

  X-Hg-Notification: changeset 0647d048b600

  Message-Id: <*> (glob)

  To: baz@test.com, foo@bar

  changeset 0647d048b600 in b

  description: b

  diffstat:

   a |  1 +

   1 files changed, 1 insertions(+), 0 deletions(-)

  diffs (6 lines):

  diff -r cb9a9f314b8b -r 0647d048b600 a

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

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

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

   a

  +a

  (run 'hg update' to get a working copy)

test merge

  $ cd a

  $ hg up -C 0

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

  $ echo a >> a

  $ hg ci -Am adda2 -d '2 0'

  created new head

  $ hg merge

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

  (branch merge, don't forget to commit)

  $ hg ci -m merge -d '3 0'

  $ cd ..

  $ hg --traceback --cwd b pull ../a | \

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

  pulling from ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 2 changesets with 0 changes to 0 files

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  X-Test: foo

  Date: * (glob)

  Subject: adda2

  From: test@test.com

  X-Hg-Notification: changeset 0a184ce6067f

  Message-Id: <*> (glob)

  To: baz@test.com, foo@bar

  changeset 0a184ce6067f in b

  description: adda2

  diffstat:

   a |  1 +

   1 files changed, 1 insertions(+), 0 deletions(-)

  diffs (6 lines):

  diff -r cb9a9f314b8b -r 0a184ce6067f a

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

  +++ b/a	Thu Jan 01 00:00:02 1970 +0000

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

   a

  +a

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 7bit

  X-Test: foo

  Date: * (glob)

  Subject: merge

  From: test@test.com

  X-Hg-Notification: changeset 6a0cf76b2701

  Message-Id: <*> (glob)

  To: baz@test.com, foo@bar

  changeset 6a0cf76b2701 in b

  description: merge

  (run 'hg update' to get a working copy)

truncate multi-byte subject

  $ cat <<EOF >> $HGRCPATH

  > [notify]

  > maxsubject = 4

  > EOF

  $ echo a >> a/a

  $ hg --cwd a --encoding utf-8 commit -A -d '0 0' \

  >   -m `python -c 'print "\xc3\xa0\xc3\xa1\xc3\xa2\xc3\xa3\xc3\xa4"'`

  $ hg --traceback --cwd b --encoding utf-8 pull ../a | \

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

  pulling from ../a

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

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

  MIME-Version: 1.0

  Content-Transfer-Encoding: 8bit

  X-Test: foo

  Date: * (glob)

  Subject: \xc3\xa0... (esc)