view hgext/notify.py @ 6779:d3147b4e3e8a

hgweb: centralize permission checks for protocol commands

Consistently enforces authorization checks set up in hgrc up front, so that
the actual commands don't have to worry about them and implementers of
hgweb alternatives can easily implement their own permission checks.

# 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, 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 = [e-mail]   # 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
        return util.sort(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

        msg['Date'] = util.datestr(format="%a, %d %b %Y %H:%M:%S %1%2")
        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))
        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:
            return
        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[node].rev()
        end = len(repo)
        count = end - start
        for rev in xrange(start, end):
            n.node(repo[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)