# notify.py - email notifications for mercurial

#

# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

#

# hook extension to email notifications to people when changesets are

# committed to a repo they subscribe to.

#

# default mode is to print messages to stdout, for testing and

# configuring.

#

# to use, configure notify extension and enable in hgrc like this:

#

#   [extensions]

#   hgext.notify =

#

#   [hooks]

#   # one email for each incoming changeset

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

#   # batch emails when many changesets incoming at one time

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

#

#   [notify]

#   # config items go in here

#

# config items:

#

# REQUIRED:

#   config = /path/to/file # file containing subscriptions

#

# OPTIONAL:

#   test = True            # print messages to stdout for testing

#   strip = 3              # number of slashes to strip for url paths

#   domain = example.com   # domain to use if committer missing domain

#   style = ...            # style file to use when formatting email

#   template = ...         # template to use when formatting email

#   incoming = ...         # template to use when run as incoming hook

#   changegroup = ...      # template when run as changegroup hook

#   maxdiff = 300          # max lines of diffs to include (0=none, -1=all)

#   maxsubject = 67        # truncate subject line longer than this

#   diffstat = True        # add a diffstat before the diff content

#   sources = serve        # notify if source of incoming changes in this list

#                          # (serve == ssh or http, push, pull, bundle)

#   [email]

#   from = user@host.com   # email address to send as if none given

#   [web]

#   baseurl = http://hgserver/... # root of hg web site for browsing commits

#

# notify config file has same format as regular hgrc. it has two

# sections so you can express subscriptions in whatever way is handier

# for you.

#

#   [usersubs]

#   # key is subscriber email, value is ","-separated list of glob patterns

#   user@host = pattern

#

#   [reposubs]

#   # key is glob pattern, value is ","-separated list of subscriber emails

#   pattern = user@host

#

# glob patterns are matched against path to repo root.

#

# if you like, you can put notify config file in repo that users can

# push changes to, they can manage their own subscriptions.

from mercurial.i18n import _

from mercurial.node import bin, short

from mercurial import patch, cmdutil, templater, util, mail

import email.Parser, fnmatch, socket, time

# template for single changeset can include email headers.

single_template = '''

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 = '''

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.readsections(cfg, 'usersubs', 'reposubs')

        self.repo = repo

        self.stripcount = int(self.ui.config('notify', 'strip', 0))

        self.root = self.strip(self.repo.root)

        self.domain = self.ui.config('notify', 'domain')

        self.subs = self.subscribers()

        mapfile = self.ui.config('notify', 'style')

        template = (self.ui.config('notify', hooktype) or

                    self.ui.config('notify', 'template'))

        self.t = cmdutil.changeset_templater(self.ui, self.repo,

                                             False, mapfile, False)

        if not mapfile and not template:

            template = deftemplates.get(hooktype) or single_template

        if template:

            template = templater.parsestring(template, quoted=False)

            self.t.use_template(template)

    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 = util.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 = {}

        for user, pats in self.ui.configitems('usersubs'):

            for pat in pats.split(','):

                if fnmatch.fnmatch(self.repo.root, pat.strip()):

                    subs[self.fixmail(user)] = 1

        for pat, users in self.ui.configitems('reposubs'):

            if fnmatch.fnmatch(self.repo.root, pat):

                for user in users.split(','):

                    subs[self.fixmail(user)] = 1

        subs = subs.keys()

        subs.sort()

        return subs

    def url(self, path=None):

        return self.ui.config('web', 'baseurl') + (path or self.root)

    def node(self, node):

        '''format one changeset.'''

        self.t.show(changenode=node, changes=self.repo.changelog.read(node),

                    baseurl=self.ui.config('web', 'baseurl'),

                    root=self.repo.root,

                    webroot=self.root)

    def skipsource(self, source):

        '''true if incoming changes from this source should be skipped.'''

        ok_sources = self.ui.config('notify', 'sources', 'serve').split()

        return source not in ok_sources

    def send(self, node, count, data):

        '''send message.'''

        p = email.Parser.Parser()

        msg = p.parsestr(data)

        def fix_subject():

            '''try to make subject line exist and be useful.'''

            subject = msg['Subject']

            if not subject:

                if count > 1:

                    subject = _('%s: %d new changesets') % (self.root, count)

                else:

                    changes = self.repo.changelog.read(node)

                    s = changes[4].lstrip().split('\n', 1)[0].rstrip()

                    subject = '%s: %s' % (self.root, s)

            maxsubject = int(self.ui.config('notify', 'maxsubject', 67))

            if maxsubject and len(subject) > maxsubject:

                subject = subject[:maxsubject-3] + '...'

            del msg['Subject']

            msg['Subject'] = subject

        def fix_sender():

            '''try to make message have proper sender.'''

            sender = msg['From']

            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)

            del msg['From']

            msg['From'] = sender

        fix_subject()

        fix_sender()

        msg['X-Hg-Notification'] = 'changeset ' + short(node)

        if not msg['Message-Id']:

            msg['Message-Id'] = ('<hg.%s.%s.%s@%s>' %

                                 (short(node), int(time.time()),

                                  hash(self.repo.root), socket.getfqdn()))

        msg['To'] = ', '.join(self.subs)

        msgtext = msg.as_string(0)

        if self.ui.configbool('notify', 'test', True):

            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(self.subs), count))

            mail.sendmail(self.ui, util.email(msg['From']),

                          self.subs, msgtext)

    def diff(self, node, ref):

        maxdiff = int(self.ui.config('notify', 'maxdiff', 300))

        if maxdiff == 0:

            return

        prev = self.repo.changelog.parents(node)[0]

        self.ui.pushbuffer()

        patch.diff(self.repo, prev, ref)

        difflines = self.ui.popbuffer().splitlines(1)

        if self.ui.configbool('notify', 'diffstat', True):

            s = patch.diffstat(difflines)

            # s may be nil, don't include the header if it is

            if s:

                self.ui.write('\ndiffstat:\n\n%s' % s)

        if maxdiff > 0 and len(difflines) > maxdiff:

            self.ui.write(_('\ndiffs (truncated from %d to %d lines):\n\n') %

                          (len(difflines), maxdiff))

            difflines = difflines[:maxdiff]

        elif difflines:

            self.ui.write(_('\ndiffs (%d lines):\n\n') % len(difflines))

        self.ui.write(*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)

    if not n.subs:

        ui.debug(_('notify: no subscribers to repo %s\n') % n.root)

        return

    if n.skipsource(source):

        ui.debug(_('notify: changes have source "%s" - skipping\n') %

                 source)

        return

    node = bin(node)

    ui.pushbuffer()

    if hooktype == 'changegroup':

        start = repo.changelog.rev(node)

        end = repo.changelog.count()

        count = end - start

        for rev in xrange(start, end):

            n.node(repo.changelog.node(rev))

        n.diff(node, repo.changelog.tip())

    else:

        count = 1

        n.node(node)

        n.diff(node, node)

    data = ui.popbuffer()

    n.send(node, count, data)