pycompat: add bytestr wrapper which mostly acts as a Python 2 str
This allows us to handle bytes in mostly the same manner as Python 2 str,
so we can get rid of ugly s[i:i + 1] hacks:
s = bytestr(s)
while i < len(s):
c = s[i]
...
This is the simpler version of the previous RFC patch which tried to preserve
the bytestr type if possible. New version simply drops the bytestr wrapping
so we aren't likely to pass a bytestr to a function that expects Python 3
bytes.
# patchbomb.py - sending Mercurial changesets as patch emails
#
# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''command to send changesets as (a series of) patch emails
The series is started off with a "[PATCH 0 of N]" introduction, which
describes the series as a whole.
Each patch email has a Subject line of "[PATCH M of N] ...", using the
first line of the changeset description as the subject text. The
message contains two or three body parts:
- The changeset description.
- [Optional] The result of running diffstat on the patch.
- The patch itself, as generated by :hg:`export`.
Each message refers to the first in the series using the In-Reply-To
and References headers, so they will show up as a sequence in threaded
mail and news readers, and in mail archives.
To configure other defaults, add a section like this to your
configuration file::
[email]
from = My Name <my@email>
to = recipient1, recipient2, ...
cc = cc1, cc2, ...
bcc = bcc1, bcc2, ...
reply-to = address1, address2, ...
Use ``[patchbomb]`` as configuration section name if you need to
override global ``[email]`` address settings.
Then you can use the :hg:`email` command to mail a series of
changesets as a patchbomb.
You can also either configure the method option in the email section
to be a sendmail compatible mailer or fill out the [smtp] section so
that the patchbomb extension can automatically send patchbombs
directly from the commandline. See the [email] and [smtp] sections in
hgrc(5) for details.
By default, :hg:`email` will prompt for a ``To`` or ``CC`` header if
you do not supply one via configuration or the command line. You can
override this to never prompt by configuring an empty value::
[email]
cc =
You can control the default inclusion of an introduction message with the
``patchbomb.intro`` configuration option. The configuration is always
overwritten by command line flags like --intro and --desc::
[patchbomb]
intro=auto # include introduction message if more than 1 patch (default)
intro=never # never include an introduction message
intro=always # always include an introduction message
You can specify a template for flags to be added in subject prefixes. Flags
specified by --flag option are exported as ``{flags}`` keyword::
[patchbomb]
flagtemplate = "{separate(' ',
ifeq(branch, 'default', '', branch|upper),
flags)}"
You can set patchbomb to always ask for confirmation by setting
``patchbomb.confirm`` to true.
'''
from __future__ import absolute_import
import email as emailmod
import errno
import os
import socket
import tempfile
from mercurial.i18n import _
from mercurial import (
cmdutil,
commands,
encoding,
error,
formatter,
hg,
mail,
node as nodemod,
patch,
scmutil,
templater,
util,
)
stringio = util.stringio
cmdtable = {}
command = cmdutil.command(cmdtable)
# 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'
def _addpullheader(seq, ctx):
"""Add a header pointing to a public URL where the changeset is available
"""
repo = ctx.repo()
# experimental config: patchbomb.publicurl
# waiting for some logic that check that the changeset are available on the
# destination before patchbombing anything.
pullurl = repo.ui.config('patchbomb', 'publicurl')
if pullurl is not None:
return ('Available At %s\n'
'# hg pull %s -r %s' % (pullurl, pullurl, ctx))
return None
def uisetup(ui):
cmdutil.extraexport.append('pullurl')
cmdutil.extraexportmap['pullurl'] = _addpullheader
def prompt(ui, prompt, default=None, rest=':'):
if default:
prompt += ' [%s]' % default
return ui.prompt(prompt + rest, default)
def introwanted(ui, opts, number):
'''is an introductory message apparently wanted?'''
introconfig = ui.config('patchbomb', 'intro', 'auto')
if opts.get('intro') or opts.get('desc'):
intro = True
elif introconfig == 'always':
intro = True
elif introconfig == 'never':
intro = False
elif introconfig == 'auto':
intro = 1 < number
else:
ui.write_err(_('warning: invalid patchbomb.intro value "%s"\n')
% introconfig)
ui.write_err(_('(should be one of always, never, auto)\n'))
intro = 1 < number
return intro
def _formatflags(ui, repo, rev, flags):
"""build flag string optionally by template"""
tmpl = ui.config('patchbomb', 'flagtemplate')
if not tmpl:
return ' '.join(flags)
out = util.stringio()
opts = {'template': templater.unquotestring(tmpl)}
with formatter.templateformatter(ui, out, 'patchbombflag', opts) as fm:
fm.startitem()
fm.context(ctx=repo[rev])
fm.write('flags', '%s', fm.formatlist(flags, name='flag'))
return out.getvalue()
def _formatprefix(ui, repo, rev, flags, idx, total, numbered):
"""build prefix to patch subject"""
flag = _formatflags(ui, repo, rev, flags)
if flag:
flag = ' ' + flag
if not numbered:
return '[PATCH%s]' % flag
else:
tlen = len(str(total))
return '[PATCH %0*d of %d%s]' % (tlen, idx, total, flag)
def makepatch(ui, repo, rev, patchlines, opts, _charsets, idx, total, numbered,
patchname=None):
desc = []
node = None
body = ''
for line in patchlines:
if line.startswith('#'):
if line.startswith('# Node ID'):
node = line.split()[-1]
continue
if line.startswith('diff -r') or line.startswith('diff --git'):
break
desc.append(line)
if not patchname and not node:
raise ValueError
if opts.get('attach') and not opts.get('body'):
body = ('\n'.join(desc[1:]).strip() or
'Patch subject is complete summary.')
body += '\n\n\n'
if opts.get('plain'):
while patchlines and patchlines[0].startswith('# '):
patchlines.pop(0)
if patchlines:
patchlines.pop(0)
while patchlines and not patchlines[0].strip():
patchlines.pop(0)
ds = patch.diffstat(patchlines)
if opts.get('diffstat'):
body += ds + '\n\n'
addattachment = opts.get('attach') or opts.get('inline')
if not addattachment or opts.get('body'):
body += '\n'.join(patchlines)
if addattachment:
msg = emailmod.MIMEMultipart.MIMEMultipart()
if body:
msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))
p = mail.mimetextpatch('\n'.join(patchlines), 'x-patch',
opts.get('test'))
binnode = nodemod.bin(node)
# if node is mq patch, it will have the patch file's name as a tag
if not patchname:
patchtags = [t for t in repo.nodetags(binnode)
if t.endswith('.patch') or t.endswith('.diff')]
if patchtags:
patchname = patchtags[0]
elif total > 1:
patchname = cmdutil.makefilename(repo, '%b-%n.patch',
binnode, seqno=idx,
total=total)
else:
patchname = cmdutil.makefilename(repo, '%b.patch', binnode)
disposition = 'inline'
if opts.get('attach'):
disposition = 'attachment'
p['Content-Disposition'] = disposition + '; filename=' + patchname
msg.attach(p)
else:
msg = mail.mimetextpatch(body, display=opts.get('test'))
prefix = _formatprefix(ui, repo, rev, opts.get('flag'), idx, total,
numbered)
subj = desc[0].strip().rstrip('. ')
if not numbered:
subj = ' '.join([prefix, opts.get('subject') or subj])
else:
subj = ' '.join([prefix, subj])
msg['Subject'] = mail.headencode(ui, subj, _charsets, opts.get('test'))
msg['X-Mercurial-Node'] = node
msg['X-Mercurial-Series-Index'] = '%i' % idx
msg['X-Mercurial-Series-Total'] = '%i' % total
return msg, subj, ds
def _getpatches(repo, revs, **opts):
"""return a list of patches for a list of revisions
Each patch in the list is itself a list of lines.
"""
ui = repo.ui
prev = repo['.'].rev()
for r in revs:
if r == prev and (repo[None].files() or repo[None].deleted()):
ui.warn(_('warning: working directory has '
'uncommitted changes\n'))
output = stringio()
cmdutil.export(repo, [r], fp=output,
opts=patch.difffeatureopts(ui, opts, git=True))
yield output.getvalue().split('\n')
def _getbundle(repo, dest, **opts):
"""return a bundle containing changesets missing in "dest"
The `opts` keyword-arguments are the same as the one accepted by the
`bundle` command.
The bundle is a returned as a single in-memory binary blob.
"""
ui = repo.ui
tmpdir = tempfile.mkdtemp(prefix='hg-email-bundle-')
tmpfn = os.path.join(tmpdir, 'bundle')
btype = ui.config('patchbomb', 'bundletype')
if btype:
opts['type'] = btype
try:
commands.bundle(ui, repo, tmpfn, dest, **opts)
return util.readfile(tmpfn)
finally:
try:
os.unlink(tmpfn)
except OSError:
pass
os.rmdir(tmpdir)
def _getdescription(repo, defaultbody, sender, **opts):
"""obtain the body of the introduction message and return it
This is also used for the body of email with an attached bundle.
The body can be obtained either from the command line option or entered by
the user through the editor.
"""
ui = repo.ui
if opts.get('desc'):
body = open(opts.get('desc')).read()
else:
ui.write(_('\nWrite the introductory message for the '
'patch series.\n\n'))
body = ui.edit(defaultbody, sender, repopath=repo.path)
# Save series description in case sendmail fails
msgfile = repo.vfs('last-email.txt', 'wb')
msgfile.write(body)
msgfile.close()
return body
def _getbundlemsgs(repo, sender, bundle, **opts):
"""Get the full email for sending a given bundle
This function returns a list of "email" tuples (subject, content, None).
The list is always one message long in that case.
"""
ui = repo.ui
_charsets = mail._charsets(ui)
subj = (opts.get('subject')
or prompt(ui, 'Subject:', 'A bundle for your repository'))
body = _getdescription(repo, '', sender, **opts)
msg = emailmod.MIMEMultipart.MIMEMultipart()
if body:
msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))
datapart = emailmod.MIMEBase.MIMEBase('application', 'x-mercurial-bundle')
datapart.set_payload(bundle)
bundlename = '%s.hg' % opts.get('bundlename', 'bundle')
datapart.add_header('Content-Disposition', 'attachment',
filename=bundlename)
emailmod.Encoders.encode_base64(datapart)
msg.attach(datapart)
msg['Subject'] = mail.headencode(ui, subj, _charsets, opts.get('test'))
return [(msg, subj, None)]
def _makeintro(repo, sender, revs, patches, **opts):
"""make an introduction email, asking the user for content if needed
email is returned as (subject, body, cumulative-diffstat)"""
ui = repo.ui
_charsets = mail._charsets(ui)
# use the last revision which is likely to be a bookmarked head
prefix = _formatprefix(ui, repo, revs.last(), opts.get('flag'),
0, len(patches), numbered=True)
subj = (opts.get('subject') or
prompt(ui, '(optional) Subject: ', rest=prefix, default=''))
if not subj:
return None # skip intro if the user doesn't bother
subj = prefix + ' ' + subj
body = ''
if opts.get('diffstat'):
# generate a cumulative diffstat of the whole patch series
diffstat = patch.diffstat(sum(patches, []))
body = '\n' + diffstat
else:
diffstat = None
body = _getdescription(repo, body, sender, **opts)
msg = mail.mimeencode(ui, body, _charsets, opts.get('test'))
msg['Subject'] = mail.headencode(ui, subj, _charsets,
opts.get('test'))
return (msg, subj, diffstat)
def _getpatchmsgs(repo, sender, revs, patchnames=None, **opts):
"""return a list of emails from a list of patches
This involves introduction message creation if necessary.
This function returns a list of "email" tuples (subject, content, None).
"""
ui = repo.ui
_charsets = mail._charsets(ui)
patches = list(_getpatches(repo, revs, **opts))
msgs = []
ui.write(_('this patch series consists of %d patches.\n\n')
% len(patches))
# build the intro message, or skip it if the user declines
if introwanted(ui, opts, len(patches)):
msg = _makeintro(repo, sender, revs, patches, **opts)
if msg:
msgs.append(msg)
# are we going to send more than one message?
numbered = len(msgs) + len(patches) > 1
# now generate the actual patch messages
name = None
assert len(revs) == len(patches)
for i, (r, p) in enumerate(zip(revs, patches)):
if patchnames:
name = patchnames[i]
msg = makepatch(ui, repo, r, p, opts, _charsets, i + 1,
len(patches), numbered, name)
msgs.append(msg)
return msgs
def _getoutgoing(repo, dest, revs):
'''Return the revisions present locally but not in dest'''
ui = repo.ui
url = ui.expandpath(dest or 'default-push', dest or 'default')
url = hg.parseurl(url)[0]
ui.status(_('comparing with %s\n') % util.hidepassword(url))
revs = [r for r in revs if r >= 0]
if not revs:
revs = [len(repo) - 1]
revs = repo.revs('outgoing(%s) and ::%ld', dest or '', revs)
if not revs:
ui.status(_("no changes found\n"))
return revs
emailopts = [
('', 'body', None, _('send patches as inline message text (default)')),
('a', 'attach', None, _('send patches as attachments')),
('i', 'inline', None, _('send patches as inline attachments')),
('', 'bcc', [], _('email addresses of blind carbon copy recipients')),
('c', 'cc', [], _('email addresses of copy recipients')),
('', 'confirm', None, _('ask for confirmation before sending')),
('d', 'diffstat', None, _('add diffstat output to messages')),
('', 'date', '', _('use the given date as the sending date')),
('', 'desc', '', _('use the given file as the series description')),
('f', 'from', '', _('email address of sender')),
('n', 'test', None, _('print messages that would be sent')),
('m', 'mbox', '', _('write messages to mbox file instead of sending them')),
('', 'reply-to', [], _('email addresses replies should be sent to')),
('s', 'subject', '', _('subject of first message (intro or single patch)')),
('', 'in-reply-to', '', _('message identifier to reply to')),
('', 'flag', [], _('flags to add in subject prefixes')),
('t', 'to', [], _('email addresses of recipients'))]
@command('email',
[('g', 'git', None, _('use git extended diff format')),
('', 'plain', None, _('omit hg patch header')),
('o', 'outgoing', None,
_('send changes not found in the target repository')),
('b', 'bundle', None, _('send changes not in target as a binary bundle')),
('', 'bundlename', 'bundle',
_('name of the bundle attachment file'), _('NAME')),
('r', 'rev', [], _('a revision to send'), _('REV')),
('', 'force', None, _('run even when remote repository is unrelated '
'(with -b/--bundle)')),
('', 'base', [], _('a base changeset to specify instead of a destination '
'(with -b/--bundle)'), _('REV')),
('', 'intro', None, _('send an introduction email for a single patch')),
] + emailopts + commands.remoteopts,
_('hg email [OPTION]... [DEST]...'))
def email(ui, repo, *revs, **opts):
'''send changesets by email
By default, diffs are sent in the format generated by
:hg:`export`, one per message. The series starts with a "[PATCH 0
of N]" introduction, which describes the series as a whole.
Each patch email has a Subject line of "[PATCH M of N] ...", using
the first line of the changeset description as the subject text.
The message contains two or three parts. First, the changeset
description.
With the -d/--diffstat option, if the diffstat program is
installed, the result of running diffstat on the patch is inserted.
Finally, the patch itself, as generated by :hg:`export`.
With the -d/--diffstat or --confirm options, you will be presented
with a final summary of all messages and asked for confirmation before
the messages are sent.
By default the patch is included as text in the email body for
easy reviewing. Using the -a/--attach option will instead create
an attachment for the patch. With -i/--inline an inline attachment
will be created. You can include a patch both as text in the email
body and as a regular or an inline attachment by combining the
-a/--attach or -i/--inline with the --body option.
With -o/--outgoing, emails will be generated for patches not found
in the destination repository (or only those which are ancestors
of the specified revisions if any are provided)
With -b/--bundle, changesets are selected as for --outgoing, but a
single email containing a binary Mercurial bundle as an attachment
will be sent. Use the ``patchbomb.bundletype`` config option to
control the bundle type as with :hg:`bundle --type`.
With -m/--mbox, instead of previewing each patchbomb message in a
pager or sending the messages directly, it will create a UNIX
mailbox file with the patch emails. This mailbox file can be
previewed with any mail user agent which supports UNIX mbox
files.
With -n/--test, all steps will run, but mail will not be sent.
You will be prompted for an email recipient address, a subject and
an introductory message describing the patches of your patchbomb.
Then when all is done, patchbomb messages are displayed. If the
PAGER environment variable is set, your pager will be fired up once
for each patchbomb message, so you can verify everything is alright.
In case email sending fails, you will find a backup of your series
introductory message in ``.hg/last-email.txt``.
The default behavior of this command can be customized through
configuration. (See :hg:`help patchbomb` for details)
Examples::
hg email -r 3000 # send patch 3000 only
hg email -r 3000 -r 3001 # send patches 3000 and 3001
hg email -r 3000:3005 # send patches 3000 through 3005
hg email 3000 # send patch 3000 (deprecated)
hg email -o # send all patches not in default
hg email -o DEST # send all patches not in DEST
hg email -o -r 3000 # send all ancestors of 3000 not in default
hg email -o -r 3000 DEST # send all ancestors of 3000 not in DEST
hg email -b # send bundle of all patches not in default
hg email -b DEST # send bundle of all patches not in DEST
hg email -b -r 3000 # bundle of all ancestors of 3000 not in default
hg email -b -r 3000 DEST # bundle of all ancestors of 3000 not in DEST
hg email -o -m mbox && # generate an mbox file...
mutt -R -f mbox # ... and view it with mutt
hg email -o -m mbox && # generate an mbox file ...
formail -s sendmail \\ # ... and use formail to send from the mbox
-bm -t < mbox # ... using sendmail
Before using this command, you will need to enable email in your
hgrc. See the [email] section in hgrc(5) for details.
'''
_charsets = mail._charsets(ui)
bundle = opts.get('bundle')
date = opts.get('date')
mbox = opts.get('mbox')
outgoing = opts.get('outgoing')
rev = opts.get('rev')
if not (opts.get('test') or mbox):
# really sending
mail.validateconfig(ui)
if not (revs or rev or outgoing or bundle):
raise error.Abort(_('specify at least one changeset with -r or -o'))
if outgoing and bundle:
raise error.Abort(_("--outgoing mode always on with --bundle;"
" do not re-specify --outgoing"))
if outgoing or bundle:
if len(revs) > 1:
raise error.Abort(_("too many destinations"))
if revs:
dest = revs[0]
else:
dest = None
revs = []
if rev:
if revs:
raise error.Abort(_('use only one form to specify the revision'))
revs = rev
revs = scmutil.revrange(repo, revs)
if outgoing:
revs = _getoutgoing(repo, dest, revs)
if bundle:
opts['revs'] = [str(r) for r in revs]
# check if revision exist on the public destination
publicurl = repo.ui.config('patchbomb', 'publicurl')
if publicurl is not None:
repo.ui.debug('checking that revision exist in the public repo')
try:
publicpeer = hg.peer(repo, {}, publicurl)
except error.RepoError:
repo.ui.write_err(_('unable to access public repo: %s\n')
% publicurl)
raise
if not publicpeer.capable('known'):
repo.ui.debug('skipping existence checks: public repo too old')
else:
out = [repo[r] for r in revs]
known = publicpeer.known(h.node() for h in out)
missing = []
for idx, h in enumerate(out):
if not known[idx]:
missing.append(h)
if missing:
if 1 < len(missing):
msg = _('public "%s" is missing %s and %i others')
msg %= (publicurl, missing[0], len(missing) - 1)
else:
msg = _('public url %s is missing %s')
msg %= (publicurl, missing[0])
revhint = ' '.join('-r %s' % h
for h in repo.set('heads(%ld)', missing))
hint = _("use 'hg push %s %s'") % (publicurl, revhint)
raise error.Abort(msg, hint=hint)
# start
if date:
start_time = util.parsedate(date)
else:
start_time = util.makedate()
def genmsgid(id):
return '<%s.%s@%s>' % (id[:20], int(start_time[0]), socket.getfqdn())
# deprecated config: patchbomb.from
sender = (opts.get('from') or ui.config('email', 'from') or
ui.config('patchbomb', 'from') or
prompt(ui, 'From', ui.username()))
if bundle:
bundledata = _getbundle(repo, dest, **opts)
bundleopts = opts.copy()
bundleopts.pop('bundle', None) # already processed
msgs = _getbundlemsgs(repo, sender, bundledata, **bundleopts)
else:
msgs = _getpatchmsgs(repo, sender, revs, **opts)
showaddrs = []
def getaddrs(header, ask=False, default=None):
configkey = header.lower()
opt = header.replace('-', '_').lower()
addrs = opts.get(opt)
if addrs:
showaddrs.append('%s: %s' % (header, ', '.join(addrs)))
return mail.addrlistencode(ui, addrs, _charsets, opts.get('test'))
# not on the command line: fallback to config and then maybe ask
addr = (ui.config('email', configkey) or
ui.config('patchbomb', configkey))
if not addr:
specified = (ui.hasconfig('email', configkey) or
ui.hasconfig('patchbomb', configkey))
if not specified and ask:
addr = prompt(ui, header, default=default)
if addr:
showaddrs.append('%s: %s' % (header, addr))
return mail.addrlistencode(ui, [addr], _charsets, opts.get('test'))
else:
return default
to = getaddrs('To', ask=True)
if not to:
# we can get here in non-interactive mode
raise error.Abort(_('no recipient addresses provided'))
cc = getaddrs('Cc', ask=True, default='') or []
bcc = getaddrs('Bcc') or []
replyto = getaddrs('Reply-To')
confirm = ui.configbool('patchbomb', 'confirm')
confirm |= bool(opts.get('diffstat') or opts.get('confirm'))
if confirm:
ui.write(_('\nFinal summary:\n\n'), label='patchbomb.finalsummary')
ui.write(('From: %s\n' % sender), label='patchbomb.from')
for addr in showaddrs:
ui.write('%s\n' % addr, label='patchbomb.to')
for m, subj, ds in msgs:
ui.write(('Subject: %s\n' % subj), label='patchbomb.subject')
if ds:
ui.write(ds, label='patchbomb.diffstats')
ui.write('\n')
if ui.promptchoice(_('are you sure you want to send (yn)?'
'$$ &Yes $$ &No')):
raise error.Abort(_('patchbomb canceled'))
ui.write('\n')
parent = opts.get('in_reply_to') or None
# angle brackets may be omitted, they're not semantically part of the msg-id
if parent is not None:
if not parent.startswith('<'):
parent = '<' + parent
if not parent.endswith('>'):
parent += '>'
sender_addr = emailmod.Utils.parseaddr(sender)[1]
sender = mail.addressencode(ui, sender, _charsets, opts.get('test'))
sendmail = None
firstpatch = None
for i, (m, subj, ds) in enumerate(msgs):
try:
m['Message-Id'] = genmsgid(m['X-Mercurial-Node'])
if not firstpatch:
firstpatch = m['Message-Id']
m['X-Mercurial-Series-Id'] = firstpatch
except TypeError:
m['Message-Id'] = genmsgid('patchbomb')
if parent:
m['In-Reply-To'] = parent
m['References'] = parent
if not parent or 'X-Mercurial-Node' not in m:
parent = m['Message-Id']
m['User-Agent'] = 'Mercurial-patchbomb/%s' % util.version()
m['Date'] = emailmod.Utils.formatdate(start_time[0], localtime=True)
start_time = (start_time[0] + 1, start_time[1])
m['From'] = sender
m['To'] = ', '.join(to)
if cc:
m['Cc'] = ', '.join(cc)
if bcc:
m['Bcc'] = ', '.join(bcc)
if replyto:
m['Reply-To'] = ', '.join(replyto)
if opts.get('test'):
ui.status(_('displaying '), subj, ' ...\n')
ui.flush()
if 'PAGER' in encoding.environ and not ui.plain():
fp = util.popen(encoding.environ['PAGER'], 'w')
else:
fp = ui
generator = emailmod.Generator.Generator(fp, mangle_from_=False)
try:
generator.flatten(m, 0)
fp.write('\n')
except IOError as inst:
if inst.errno != errno.EPIPE:
raise
if fp is not ui:
fp.close()
else:
if not sendmail:
sendmail = mail.connect(ui, mbox=mbox)
ui.status(_('sending '), subj, ' ...\n')
ui.progress(_('sending'), i, item=subj, total=len(msgs),
unit=_('emails'))
if not mbox:
# Exim does not remove the Bcc field
del m['Bcc']
fp = stringio()
generator = emailmod.Generator.Generator(fp, mangle_from_=False)
generator.flatten(m, 0)
sendmail(sender_addr, to + bcc + cc, fp.getvalue())
ui.progress(_('writing'), None)
ui.progress(_('sending'), None)