# 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.

'''

import os, errno, socket, tempfile, cStringIO

import email

# On python2.4 you have to import these by name or they fail to

# load. This was not a problem on Python 2.7.

import email.Generator

import email.MIMEMultipart

from mercurial import cmdutil, commands, hg, mail, patch, util

from mercurial import scmutil

from mercurial.i18n import _

from mercurial.node import bin

cmdtable = {}

command = cmdutil.command(cmdtable)

testedwith = 'internal'

def prompt(ui, prompt, default=None, rest=':'):

    if default:

        prompt += ' [%s]' % default

    return ui.prompt(prompt + rest, default)

def introwanted(opts, number):

    '''is an introductory message apparently wanted?'''

    return number > 1 or opts.get('intro') or opts.get('desc')

def makepatch(ui, repo, 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, git=opts.get('git'))

    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 = email.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 = 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'))

    flag = ' '.join(opts.get('flag'))

    if flag:

        flag = ' ' + flag

    subj = desc[0].strip().rstrip('. ')

    if not numbered:

        subj = '[PATCH%s] %s' % (flag, opts.get('subject') or subj)

    else:

        tlen = len(str(total))

        subj = '[PATCH %0*d of %d%s] %s' % (tlen, idx, total, flag, 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 scmutil.revrange(repo, revs):

        if r == prev and (repo[None].files() or repo[None].deleted()):

            ui.warn(_('warning: working directory has '

                      'uncommitted changes\n'))

        output = cStringIO.StringIO()

        cmdutil.export(repo, [r], fp=output,

                     opts=patch.diffopts(ui, opts))

        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')

    try:

        commands.bundle(ui, repo, tmpfn, dest, **opts)

        fp = open(tmpfn, 'rb')

        data = fp.read()

        fp.close()

        return data

    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)

        # Save series description in case sendmail fails

        msgfile = repo.opener('last-email.txt', 'wb')

        msgfile.write(body)

        msgfile.close()

    return body

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 patchbomb(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.

    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``.

    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')

    # internal option used by pbranches

    patches = opts.get('patches')

    def getoutgoing(dest, revs):

        '''Return the revisions present locally but not in dest'''

        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 scmutil.revrange(repo, 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 []