notify: add option for deterministic message-id generation

Copied from email by durin42:
> Pierre-Yves asked offline why I asked a new option for this and why it
> is not the default. Message-Id is supposed to be unique world-wide and
> while it is desirable to have a deterministic mechanism for them for
> creating follow-up emails, it needs organisational control for ensuring
> the uniqueness.


Differential Revision: https://phab.mercurial-scm.org/D6824

hgext/notify.py

@@ -1,519 +1,540 b''
 # notify.py - email notifications for mercurial
 #
 # Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 '''hooks for sending email push notifications
 
 This extension implements hooks to send email notifications when
 changesets are sent from or received by the local repository.
 
 First, enable the extension as explained in :hg:`help extensions`, and
 register the hook you want to run. ``incoming`` and ``changegroup`` hooks
 are run when changesets are received, while ``outgoing`` hooks are for
 changesets sent to another repository::
 
   [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
 
 This registers the hooks. To enable notification, subscribers must
 be assigned to repositories. The ``[usersubs]`` section maps multiple
 repositories to a given recipient. The ``[reposubs]`` section maps
 multiple recipients to a single repository::
 
   [usersubs]
   # key is subscriber email, value is a comma-separated list of repo patterns
   user@host = pattern
 
   [reposubs]
   # key is repo pattern, value is a comma-separated list of subscriber emails
   pattern = user@host
 
 A ``pattern`` is a ``glob`` matching the absolute path to a repository,
 optionally combined with a revset expression. A revset expression, if
 present, is separated from the glob by a hash. Example::
 
   [reposubs]
   */widgets#branch(release) = [e-mail]
 
 This sends to ``[e-mail]`` whenever a changeset on the ``release``
 branch triggers a notification in any repository ending in ``widgets``.
 
 In order to place them under direct user management, ``[usersubs]`` and
 ``[reposubs]`` sections may be placed in a separate ``hgrc`` file and
 incorporated by reference::
 
   [notify]
   config = /path/to/subscriptionsfile
 
 Notifications will not be sent until the ``notify.test`` value is set
 to ``False``; see below.
 
 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 activated only
   when a changeset's source is in this list. Sources may be:
 
   :``serve``: changesets received via http or ssh
   :``pull``: changesets received via ``hg pull``
   :``unbundle``: changesets received via ``hg unbundle``
   :``push``: changesets sent or received via ``hg push``
   :``bundle``: changesets sent via ``hg unbundle``
 
   Default: serve.
 
 notify.strip
   Number of leading slashes to strip from url paths. By default, notifications
   reference repositories with their absolute path. ``notify.strip`` lets you
   turn them into relative paths. For example, ``notify.strip=3`` will change
   ``/long/path/repository`` into ``repository``. Default: 0.
 
 notify.domain
   Default email domain for sender or recipients with no explicit domain.
+  It is also used for the domain part of the ``Message-Id`` when using
+  ``notify.messageidseed``.
+
+notify.messageidseed
+  Create deterministic ``Message-Id`` headers for the mails based on the seed
+  and the revision identifier of the first commit in the changeset.
 
 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 an incoming hook, overriding ``notify.template``.
 
 notify.outgoing
   Template to use when run as an outgoing hook, overriding ``notify.template``.
 
 notify.changegroup
   Template to use when running as a changegroup hook, overriding
   ``notify.template``.
 
 notify.maxdiff
   Maximum number of diff lines to include in notification email. Set to 0
   to disable the diff, or -1 to include all of it. Default: 300.
 
 notify.maxdiffstat
   Maximum number of diffstat lines to include in notification email. Set to -1
   to include all of it. Default: -1.
 
 notify.maxsubject
   Maximum number of characters in email's subject line. Default: 67.
 
 notify.diffstat
   Set to True to include a diffstat before diff content. Default: True.
 
 notify.showfunc
   If set, override ``diff.showfunc`` for the diff content. Default: None.
 
 notify.merge
   If True, send notifications for merge changesets. Default: True.
 
 notify.mbox
   If set, append mails to this mbox file instead of sending. Default: None.
 
 notify.fromauthor
   If set, use the committer of the first changeset in a changegroup for
   the "From" field of the notification mail. If not set, take the user
   from the pushing repo.  Default: False.
 
 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 the generated
   email content.
 
 web.baseurl
   Root repository URL to combine with repository paths when making
   references. See also ``notify.strip``.
 
 '''
 from __future__ import absolute_import
 
 import email.errors as emailerrors
 import email.parser as emailparser
 import fnmatch
+import hashlib
 import socket
 import time
 
 from mercurial.i18n import _
 from mercurial import (
     encoding,
     error,
     logcmdutil,
     mail,
     patch,
     registrar,
     util,
 )
 from mercurial.utils import (
     dateutil,
     stringutil,
 )
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = 'ships-with-hg-core'
 
 configtable = {}
 configitem = registrar.configitem(configtable)
 
 configitem('notify', 'changegroup',
     default=None,
 )
 configitem('notify', 'config',
     default=None,
 )
 configitem('notify', 'diffstat',
     default=True,
 )
 configitem('notify', 'domain',
     default=None,
 )
+configitem('notify', 'messageidseed',
+    default=None,
+)
 configitem('notify', 'fromauthor',
     default=None,
 )
 configitem('notify', 'incoming',
     default=None,
 )
 configitem('notify', 'maxdiff',
     default=300,
 )
 configitem('notify', 'maxdiffstat',
     default=-1,
 )
 configitem('notify', 'maxsubject',
     default=67,
 )
 configitem('notify', 'mbox',
     default=None,
 )
 configitem('notify', 'merge',
     default=True,
 )
 configitem('notify', 'outgoing',
     default=None,
 )
 configitem('notify', 'sources',
     default='serve',
 )
 configitem('notify', 'showfunc',
     default=None,
 )
 configitem('notify', 'strip',
     default=0,
 )
 configitem('notify', 'style',
     default=None,
 )
 configitem('notify', 'template',
     default=None,
 )
 configitem('notify', 'test',
     default=True,
 )
 
 # template for single changeset can include email headers.
 single_template = b'''
 Subject: changeset in {webroot}: {desc|firstline|strip}
 From: {author}
 
 changeset {node|short} in {root}
 details: {baseurl}{webroot}?cmd=changeset;node={node|short}
 description:
 \t{desc|tabindent|strip}
 '''.lstrip()
 
 # template for multiple changesets should not contain email headers,
 # because only first set of headers will be used and result will look
 # strange.
 multiple_template = b'''
 changeset {node|short} in {root}
 details: {baseurl}{webroot}?cmd=changeset;node={node|short}
 summary: {desc|firstline}
 '''
 
 deftemplates = {
     'changegroup': multiple_template,
 }
 
 class notifier(object):
     '''email notification class.'''
 
     def __init__(self, ui, repo, hooktype):
         self.ui = ui
         cfg = self.ui.config('notify', 'config')
         if cfg:
             self.ui.readconfig(cfg, sections=['usersubs', 'reposubs'])
         self.repo = repo
         self.stripcount = int(self.ui.config('notify', 'strip'))
         self.root = self.strip(self.repo.root)
         self.domain = self.ui.config('notify', 'domain')
         self.mbox = self.ui.config('notify', 'mbox')
         self.test = self.ui.configbool('notify', 'test')
         self.charsets = mail._charsets(self.ui)
         self.subs = self.subscribers()
         self.merge = self.ui.configbool('notify', 'merge')
         self.showfunc = self.ui.configbool('notify', 'showfunc')
+        self.messageidseed = self.ui.config('notify', 'messageidseed')
         if self.showfunc is None:
             self.showfunc = self.ui.configbool('diff', 'showfunc')
 
         mapfile = None
         template = (self.ui.config('notify', hooktype) or
                     self.ui.config('notify', 'template'))
         if not template:
             mapfile = self.ui.config('notify', 'style')
         if not mapfile and not template:
             template = deftemplates.get(hooktype) or single_template
         spec = logcmdutil.templatespec(template, mapfile)
         self.t = logcmdutil.changesettemplater(self.ui, self.repo, spec)
 
     def strip(self, path):
         '''strip leading slashes from local path, turn into web-safe path.'''
 
         path = util.pconvert(path)
         count = self.stripcount
         while count > 0:
             c = path.find('/')
             if c == -1:
                 break
             path = path[c + 1:]
             count -= 1
         return path
 
     def fixmail(self, addr):
         '''try to clean up email addresses.'''
 
         addr = stringutil.email(addr.strip())
         if self.domain:
             a = addr.find('@localhost')
             if a != -1:
                 addr = addr[:a]
             if '@' not in addr:
                 return addr + '@' + self.domain
         return addr
 
     def subscribers(self):
         '''return list of email addresses of subscribers to this repo.'''
         subs = set()
         for user, pats in self.ui.configitems('usersubs'):
             for pat in pats.split(','):
                 if '#' in pat:
                     pat, revs = pat.split('#', 1)
                 else:
                     revs = None
                 if fnmatch.fnmatch(self.repo.root, pat.strip()):
                     subs.add((self.fixmail(user), revs))
         for pat, users in self.ui.configitems('reposubs'):
             if '#' in pat:
                 pat, revs = pat.split('#', 1)
             else:
                 revs = None
             if fnmatch.fnmatch(self.repo.root, pat):
                 for user in users.split(','):
                     subs.add((self.fixmail(user), revs))
         return [(mail.addressencode(self.ui, s, self.charsets, self.test), r)
                 for s, r in sorted(subs)]
 
     def node(self, ctx, **props):
         '''format one changeset, unless it is a suppressed merge.'''
         if not self.merge and len(ctx.parents()) > 1:
             return False
         self.t.show(ctx, changes=ctx.changeset(),
                     baseurl=self.ui.config('web', 'baseurl'),
                     root=self.repo.root, webroot=self.root, **props)
         return True
 
     def skipsource(self, source):
         '''true if incoming changes from this source should be skipped.'''
         ok_sources = self.ui.config('notify', 'sources').split()
         return source not in ok_sources
 
     def send(self, ctx, count, data):
         '''send message.'''
 
         # Select subscribers by revset
         subs = set()
         for sub, spec in self.subs:
             if spec is None:
                 subs.add(sub)
                 continue
             revs = self.repo.revs('%r and %d:', spec, ctx.rev())
             if len(revs):
                 subs.add(sub)
                 continue
         if len(subs) == 0:
             self.ui.debug('notify: no subscribers to selected repo '
                           'and revset\n')
             return
 
         p = emailparser.Parser()
         try:
             msg = p.parsestr(encoding.strfromlocal(data))
         except emailerrors.MessageParseError as inst:
             raise error.Abort(inst)
 
         # store sender and subject
         sender = msg[r'From']
         subject = msg[r'Subject']
         if sender is not None:
             sender = encoding.strtolocal(sender)
         if subject is not None:
             subject = encoding.strtolocal(subject)
         del msg[r'From'], msg[r'Subject']
 
         if not msg.is_multipart():
             # create fresh mime message from scratch
             # (multipart templates must take care of this themselves)
             headers = msg.items()
             payload = msg.get_payload()
             # for notification prefer readability over data precision
             msg = mail.mimeencode(self.ui, payload, self.charsets, self.test)
             # reinstate custom headers
             for k, v in headers:
                 msg[k] = v
 
         msg[r'Date'] = encoding.strfromlocal(
             dateutil.datestr(format="%a, %d %b %Y %H:%M:%S %1%2"))
 
         # try to make subject line exist and be useful
         if not subject:
             if count > 1:
                 subject = _('%s: %d new changesets') % (self.root, count)
             else:
                 s = ctx.description().lstrip().split('\n', 1)[0].rstrip()
                 subject = '%s: %s' % (self.root, s)
         maxsubject = int(self.ui.config('notify', 'maxsubject'))
         if maxsubject:
             subject = stringutil.ellipsis(subject, maxsubject)
         msg[r'Subject'] = encoding.strfromlocal(
             mail.headencode(self.ui, subject, self.charsets, self.test))
 
         # try to make message have proper sender
         if not sender:
             sender = self.ui.config('email', 'from') or self.ui.username()
         if '@' not in sender or '@localhost' in sender:
             sender = self.fixmail(sender)
         msg[r'From'] = encoding.strfromlocal(
             mail.addressencode(self.ui, sender, self.charsets, self.test))
 
         msg[r'X-Hg-Notification'] = r'changeset %s' % ctx
         if not msg[r'Message-Id']:
-            msg[r'Message-Id'] = encoding.strfromlocal(
-                '<hg.%s.%d.%d@%s>' % (ctx, int(time.time()),
-                                      hash(self.repo.root),
-                                      encoding.strtolocal(socket.getfqdn())))
+            msg[r'Message-Id'] = messageid(ctx, self.domain, self.messageidseed)
         msg[r'To'] = encoding.strfromlocal(', '.join(sorted(subs)))
 
         msgtext = encoding.strtolocal(msg.as_string())
         if self.test:
             self.ui.write(msgtext)
             if not msgtext.endswith('\n'):
                 self.ui.write('\n')
         else:
             self.ui.status(_('notify: sending %d subscribers %d changes\n') %
                            (len(subs), count))
             mail.sendmail(self.ui, stringutil.email(msg[r'From']),
                           subs, msgtext, mbox=self.mbox)
 
     def diff(self, ctx, ref=None):
 
         maxdiff = int(self.ui.config('notify', 'maxdiff'))
         prev = ctx.p1().node()
         if ref:
             ref = ref.node()
         else:
             ref = ctx.node()
         diffopts = patch.diffallopts(self.ui)
         diffopts.showfunc = self.showfunc
         chunks = patch.diff(self.repo, prev, ref, opts=diffopts)
         difflines = ''.join(chunks).splitlines()
 
         if self.ui.configbool('notify', 'diffstat'):
             maxdiffstat = int(self.ui.config('notify', 'maxdiffstat'))
             s = patch.diffstat(difflines)
             # s may be nil, don't include the header if it is
             if s:
                 if maxdiffstat >= 0 and s.count("\n") > maxdiffstat + 1:
                     s = s.split("\n")
                     msg = _('\ndiffstat (truncated from %d to %d lines):\n\n')
                     self.ui.write(msg % (len(s) - 2, maxdiffstat))
                     self.ui.write("\n".join(s[:maxdiffstat] + s[-2:]))
                 else:
                     self.ui.write(_('\ndiffstat:\n\n%s') % s)
 
         if maxdiff == 0:
             return
         elif maxdiff > 0 and len(difflines) > maxdiff:
             msg = _('\ndiffs (truncated from %d to %d lines):\n\n')
             self.ui.write(msg % (len(difflines), maxdiff))
             difflines = difflines[:maxdiff]
         elif difflines:
             self.ui.write(_('\ndiffs (%d lines):\n\n') % len(difflines))
 
         self.ui.write("\n".join(difflines))
 
 def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
     '''send email notifications to interested subscribers.
 
     if used as changegroup hook, send one email for all changesets in
     changegroup. else send one email per changeset.'''
 
     n = notifier(ui, repo, hooktype)
     ctx = repo.unfiltered()[node]
 
     if not n.subs:
         ui.debug('notify: no subscribers to repository %s\n' % n.root)
         return
     if n.skipsource(source):
         ui.debug('notify: changes have source "%s" - skipping\n' % source)
         return
 
     ui.pushbuffer()
     data = ''
     count = 0
     author = ''
     if hooktype == 'changegroup' or hooktype == 'outgoing':
         for rev in repo.changelog.revs(start=ctx.rev()):
             if n.node(repo[rev]):
                 count += 1
                 if not author:
                     author = repo[rev].user()
             else:
                 data += ui.popbuffer()
                 ui.note(_('notify: suppressing notification for merge %d:%s\n')
                         % (rev, repo[rev].hex()[:12]))
                 ui.pushbuffer()
         if count:
             n.diff(ctx, repo['tip'])
     elif ctx.rev() in repo:
         if not n.node(ctx):
             ui.popbuffer()
             ui.note(_('notify: suppressing notification for merge %d:%s\n') %
                     (ctx.rev(), ctx.hex()[:12]))
             return
         count += 1
         n.diff(ctx)
         if not author:
             author = ctx.user()
 
     data += ui.popbuffer()
     fromauthor = ui.config('notify', 'fromauthor')
     if author and fromauthor:
         data = '\n'.join(['From: %s' % author, data])
 
     if count:
         n.send(ctx, count, data)
+
+def messageid(ctx, domain, messageidseed):
+    if domain and messageidseed:
+        host = domain
+    else:
+        host = encoding.strtolocal(socket.getfqdn())
+    if messageidseed:
+        messagehash = hashlib.sha512(ctx.hex() + messageidseed)
+        messageid = '<hg.%s@%s>' % (messagehash.hexdigest()[:64], host)
+    else:
+        messageid = '<hg.%s.%d.%d@%s>' % (ctx, int(time.time()),
+                                          hash(ctx.repo().root), host)
+    return encoding.strfromlocal(messageid)

tests/test-notify.t

@@ -1,748 +1,754 b''
   $ cat > $TESTTMP/filter.py <<EOF
   > from __future__ import absolute_import, print_function
   > import re
   > import sys
   > print(re.sub("\n[ \t]", " ", sys.stdin.read()), end="")
   > EOF
 
   $ 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 implements hooks to send email notifications when changesets
   are sent from or received by the local repository.
   
   First, enable the extension as explained in 'hg help extensions', and register
   the hook you want to run. "incoming" and "changegroup" hooks are run when
   changesets are received, while "outgoing" hooks are for changesets sent to
   another repository:
   
     [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
   
   This registers the hooks. To enable notification, subscribers must be assigned
   to repositories. The "[usersubs]" section maps multiple repositories to a
   given recipient. The "[reposubs]" section maps multiple recipients to a single
   repository:
   
     [usersubs]
     # key is subscriber email, value is a comma-separated list of repo patterns
     user@host = pattern
   
     [reposubs]
     # key is repo pattern, value is a comma-separated list of subscriber emails
     pattern = user@host
   
   A "pattern" is a "glob" matching the absolute path to a repository, optionally
   combined with a revset expression. A revset expression, if present, is
   separated from the glob by a hash. Example:
   
     [reposubs]
     */widgets#branch(release) = [e-mail]
   
   This sends to "[e-mail]" whenever a changeset on the "release"
   branch triggers a notification in any repository ending in "widgets".
   
   In order to place them under direct user management, "[usersubs]" and
   "[reposubs]" sections may be placed in a separate "hgrc" file and incorporated
   by reference:
   
     [notify]
     config = /path/to/subscriptionsfile
   
   Notifications will not be sent until the "notify.test" value is set to
   "False"; see below.
   
   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 activated only
     when a changeset's source is in this list. Sources may be:
   
     "serve"       changesets received via http or ssh
     "pull"        changesets received via "hg pull"
     "unbundle"    changesets received via "hg unbundle"
     "push"        changesets sent or received via "hg push"
     "bundle"      changesets sent via "hg unbundle"
   
     Default: serve.
   
   notify.strip
     Number of leading slashes to strip from url paths. By default, notifications
     reference repositories with their absolute path. "notify.strip" lets you
     turn them into relative paths. For example, "notify.strip=3" will change
     "/long/path/repository" into "repository". Default: 0.
   
   notify.domain
-    Default email domain for sender or recipients with no explicit domain.
+    Default email domain for sender or recipients with no explicit domain. It is
+    also used for the domain part of the "Message-Id" when using
+    "notify.messageidseed".
+  
+  notify.messageidseed
+    Create deterministic "Message-Id" headers for the mails based on the seed
+    and the revision identifier of the first commit in the changeset.
   
   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 an incoming hook, overriding "notify.template".
   
   notify.outgoing
     Template to use when run as an outgoing hook, overriding "notify.template".
   
   notify.changegroup
     Template to use when running as a changegroup hook, overriding
     "notify.template".
   
   notify.maxdiff
     Maximum number of diff lines to include in notification email. Set to 0 to
     disable the diff, or -1 to include all of it. Default: 300.
   
   notify.maxdiffstat
     Maximum number of diffstat lines to include in notification email. Set to -1
     to include all of it. Default: -1.
   
   notify.maxsubject
     Maximum number of characters in email's subject line. Default: 67.
   
   notify.diffstat
     Set to True to include a diffstat before diff content. Default: True.
   
   notify.showfunc
     If set, override "diff.showfunc" for the diff content. Default: None.
   
   notify.merge
     If True, send notifications for merge changesets. Default: True.
   
   notify.mbox
     If set, append mails to this mbox file instead of sending. Default: None.
   
   notify.fromauthor
     If set, use the committer of the first changeset in a changegroup for the
     "From" field of the notification mail. If not set, take the user from the
     pushing repo.  Default: False.
   
   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 the generated email
     content.
   
   web.baseurl
     Root repository URL to combine with repository paths when making references.
     See also "notify.strip".
   
   no commands defined
   $ hg init a
   $ echo a > a/a
   $ echo b > a/b
 
 commit
 
   $ hg --cwd a commit -Ama -d '0 0'
   adding a
   adding b
 
 clone
 
   $ hg --traceback clone a b
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo a >> a/a
   $ echo b >> a/b
 
 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" $TESTTMP/filter.py
+  $ hg --traceback --cwd b --config notify.domain=example.com --config notify.messageidseed=example pull ../a | "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 2 changes to 2 files
   new changesets 00a13f371396
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: changeset in $TESTTMP/b: b
-  From: test
+  From: [e-mail]
   X-Hg-Notification: changeset 00a13f371396
-  Message-Id: <*> (glob)
-  To: baz, foo@bar
+  Message-Id: <hg.[e-mail]>
+  To: [e-mail], foo@bar
   
   changeset 00a13f371396 in $TESTTMP/b
   details: $TESTTMP/b?cmd=changeset;node=00a13f371396
   description: b
   
   diffs (12 lines):
   
   diff -r 0cd96de13884 -r 00a13f371396 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
   diff -r 0cd96de13884 -r 00a13f371396 b
   --- a/b	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:01 1970 +0000
   @@ -1,1 +1,2 @@ b
   +b
   (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" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 2 changes to 2 files
   new changesets 00a13f371396
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: b
   From: [e-mail]
   X-Hg-Notification: changeset 00a13f371396
   Message-Id: <*> (glob)
   To: [e-mail], foo@bar
   
   changeset 00a13f371396 in b
   description: b
   diffs (12 lines):
   
   diff -r 0cd96de13884 -r 00a13f371396 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
   diff -r 0cd96de13884 -r 00a13f371396 b
   --- a/b	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:01 1970 +0000
   @@ -1,1 +1,2 @@ b
   +b
   (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 --config notify.maxdiffstat=1 --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 2 changes to 2 files
   new changesets 00a13f371396
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: b
   From: [e-mail]
   X-Hg-Notification: changeset 00a13f371396
   Message-Id: <*> (glob)
   To: [e-mail], foo@bar
   
   changeset 00a13f371396 in b
   description: b
   diffstat (truncated from 2 to 1 lines):
    a |  1 + 2 files changed, 2 insertions(+), 0 deletions(-)
   
   diffs (12 lines):
   
   diff -r 0cd96de13884 -r 00a13f371396 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
   diff -r 0cd96de13884 -r 00a13f371396 b
   --- a/b	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:01 1970 +0000
   @@ -1,1 +1,2 @@ b
   +b
   (run 'hg update' to get a working copy)
 
 test merge
 
   $ cd a
   $ hg up -C 0
   2 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
   1 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" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 0 changes to 0 files
   new changesets 3332653e1f3c:fccf66cd0c35
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: adda2
   From: [e-mail]
   X-Hg-Notification: changeset 3332653e1f3c
   Message-Id: <*> (glob)
   To: [e-mail], foo@bar
   
   changeset 3332653e1f3c in b
   description: adda2
   diffstat:
    a |  1 + 1 files changed, 1 insertions(+), 0 deletions(-)
   
   diffs (6 lines):
   
   diff -r 0cd96de13884 -r 3332653e1f3c 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
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: merge
   From: [e-mail]
   X-Hg-Notification: changeset fccf66cd0c35
   Message-Id: <*> (glob)
   To: [e-mail], foo@bar
   
   changeset fccf66cd0c35 in b
   description: merge
   diffstat:
    b |  1 + 1 files changed, 1 insertions(+), 0 deletions(-)
   
   diffs (6 lines):
   
   diff -r 3332653e1f3c -r fccf66cd0c35 b
   --- a/b	Thu Jan 01 00:00:02 1970 +0000
   +++ b/b	Thu Jan 01 00:00:03 1970 +0000
   @@ -1,1 +1,2 @@ b
   +b
   (run 'hg update' to get a working copy)
 
 non-ascii content and truncation of 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" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets 0f25f9c22b4c
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 8bit
   X-Test: foo
   Date: * (glob)
   Subject: \xc3\xa0... (esc)
   From: [e-mail]
   X-Hg-Notification: changeset 0f25f9c22b4c
   Message-Id: <*> (glob)
   To: [e-mail], foo@bar
   
   changeset 0f25f9c22b4c in b
   description: \xc3\xa0\xc3\xa1\xc3\xa2\xc3\xa3\xc3\xa4 (esc)
   diffstat:
    a |  1 + 1 files changed, 1 insertions(+), 0 deletions(-)
   
   diffs (7 lines):
   
   diff -r fccf66cd0c35 -r 0f25f9c22b4c a
   --- a/a	Thu Jan 01 00:00:03 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,2 +1,3 @@ a a
   +a
   (run 'hg update' to get a working copy)
 
 long lines
 
   $ cat <<EOF >> $HGRCPATH
   > [notify]
   > maxsubject = 67
   > test = False
   > mbox = mbox
   > EOF
   $ "$PYTHON" -c 'open("a/a", "ab").write(b"no" * 500 + b"\xd1\x84" + b"\n")'
   $ hg --cwd a commit -A -m "long line"
   $ hg --traceback --cwd b pull ../a
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets a846b5f6ebb7
   notify: sending 2 subscribers 1 changes
   (run 'hg update' to get a working copy)
   $ "$PYTHON" $TESTTMP/filter.py < b/mbox
   From [e-mail] ... ... .. ..:..:.. .... (re)
   MIME-Version: 1.0
   Content-Type: text/plain; charset="*" (glob)
   Content-Transfer-Encoding: quoted-printable
   X-Test: foo
   Date: * (glob)
   Subject: long line
   From: [e-mail]
   X-Hg-Notification: changeset a846b5f6ebb7
   Message-Id: <hg.a846b5f6ebb7.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset a846b5f6ebb7 in b
   description: long line
   diffstat:
    a |  1 + 1 files changed, 1 insertions(+), 0 deletions(-)
   
   diffs (8 lines):
   
   diff -r 0f25f9c22b4c -r a846b5f6ebb7 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,3 +1,4 @@ a a a
   +nonononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nononononononononononononononononononononononononononononononononononononon=
   ononononononononononononononononononononononononononononononononononononono=
   nonononononononononononono=D1=84
   
  revset selection: send to address that matches branch and repo
 
   $ cat << EOF >> $HGRCPATH
   > [hooks]
   > incoming.notify = python:hgext.notify.hook
   > 
   > [notify]
   > sources = pull
   > test = True
   > diffstat = False
   > maxdiff = 0
   > 
   > [reposubs]
   > */a#branch(test) = [e-mail]
   > */b#branch(test) = [e-mail]
   > EOF
   $ hg --cwd a branch test
   marked working directory as branch test
   (branches are permanent and global, did you want a bookmark?)
   $ echo a >> a/a
   $ hg --cwd a ci -m test -d '1 0'
   $ hg --traceback --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets f7e5aaed4080
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: test
   From: [e-mail]
   X-Hg-Notification: changeset f7e5aaed4080
   Message-Id: <hg.f7e5aaed4080.*.*@*> (glob)
   To: [e-mail], foo@bar, [e-mail]
   
   changeset f7e5aaed4080 in b
   description: test
   (run 'hg update' to get a working copy)
 
 revset selection: don't send to address that waits for mails
 from different branch
 
   $ hg --cwd a update default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo a >> a/a
   $ hg --cwd a ci -m test -d '1 0'
   $ hg --traceback --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 0 changes to 0 files (+1 heads)
   new changesets 645eb6690ecf
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   X-Test: foo
   Date: * (glob)
   Subject: test
   From: [e-mail]
   X-Hg-Notification: changeset 645eb6690ecf
   Message-Id: <hg.645eb6690ecf.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset 645eb6690ecf in b
   description: test
   (run 'hg heads' to see heads)
 
 default template:
 
   $ grep -v '^template =' $HGRCPATH > "$HGRCPATH.new"
   $ mv "$HGRCPATH.new" $HGRCPATH
   $ echo a >> a/a
   $ hg --cwd a commit -m 'default template'
   $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: changeset in b: default template
   From: [e-mail]
   X-Hg-Notification: changeset 5cd4346eed47
   Message-Id: <hg.5cd4346eed47.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset 5cd4346eed47 in $TESTTMP/b
   details: http://test/b?cmd=changeset;node=5cd4346eed47
   description: default template
 
 with style:
 
   $ cat <<EOF > notifystyle.map
   > changeset = "Subject: {desc|firstline|strip}
   >              From: {author}
   >              {""}
   >              changeset {node|short}"
   > EOF
   $ cat <<EOF >> $HGRCPATH
   > [notify]
   > style = $TESTTMP/notifystyle.map
   > EOF
   $ echo a >> a/a
   $ hg --cwd a commit -m 'with style'
   $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: with style
   From: [e-mail]
   X-Hg-Notification: changeset ec8d9d852f56
   Message-Id: <hg.ec8d9d852f56.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset ec8d9d852f56
 
 with template (overrides style):
 
   $ cat <<EOF >> $HGRCPATH
   > template = Subject: {node|short}: {desc|firstline|strip}
   >            From: {author}
   >            {""}
   >            {desc}
   > EOF
   $ echo a >> a/a
   $ hg --cwd a commit -m 'with template'
   $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: 14721b538ae3: with template
   From: [e-mail]
   X-Hg-Notification: changeset 14721b538ae3
   Message-Id: <hg.14721b538ae3.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   with template
 
 showfunc diff
   $ cat <<EOF >> $HGRCPATH
   > showfunc = True
   > template =
   > maxdiff = -1
   > EOF
   $ cd a
   $ cat > f1 << EOF
   > int main() {
   >     int a = 0;
   >     int b = 1;
   >     int c = 2;
   >     int d = 3;
   >     return a + b + c + d;
   > }
   > EOF
   $ hg commit -Am addfunction
   adding f1
   $ hg --cwd ../b pull ../a
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets b86bc16ff894
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: addfunction
   From: [e-mail]
   X-Hg-Notification: changeset b86bc16ff894
   Message-Id: <hg.b86bc16ff894.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset b86bc16ff894
   diffs (11 lines):
   
   diff -r 14721b538ae3 -r b86bc16ff894 f1
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/f1	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,7 @@
   +int main() {
   +    int a = 0;
   +    int b = 1;
   +    int c = 2;
   +    int d = 3;
   +    return a + b + c + d;
   +}
   (run 'hg update' to get a working copy)
   $ cat > f1 << EOF
   > int main() {
   >     int a = 0;
   >     int b = 1;
   >     int c = 2;
   >     int e = 3;
   >     return a + b + c + e;
   > }
   > EOF
   $ hg commit -m changefunction
   $ hg --cwd ../b --config notify.showfunc=True pull ../a
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets e81040e9838c
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: changefunction
   From: [e-mail]
   X-Hg-Notification: changeset e81040e9838c
   Message-Id: <hg.e81040e9838c.*.*@*> (glob)
   To: [e-mail], foo@bar
   
   changeset e81040e9838c
   diffs (12 lines):
   
   diff -r b86bc16ff894 -r e81040e9838c f1
   --- a/f1	Thu Jan 01 00:00:00 1970 +0000
   +++ b/f1	Thu Jan 01 00:00:00 1970 +0000
   @@ -2,6 +2,6 @@ int main() {
        int a = 0;
        int b = 1;
        int c = 2;
   -    int d = 3;
   -    return a + b + c + d;
   +    int e = 3;
   +    return a + b + c + e;
    }
   (run 'hg update' to get a working copy)