# 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.

With the -d/--diffstat option, you will be prompted for each changeset

with a diffstat summary and the changeset summary, so you can be sure

you are sending the right changes.

To configure other defaults, add a section like this to your hgrc

file::

  [email]

  from = My Name <my@email>

  to = recipient1, recipient2, ...

  cc = cc1, cc2, ...

  bcc = bcc1, bcc2, ...

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.

To avoid sending patches prematurely, it is a good idea to first run

the :hg:`email` command with the "-n" option (test only). 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.

The -m/--mbox option is also very useful. 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, e.g. with mutt::

  % mutt -R -f mbox

When you are previewing the patchbomb messages, you can use ``formail``

(a utility that is commonly installed as part of the procmail

package), to send each message out::

  % formail -s sendmail -bm -t < mbox

That should be all. Now your patchbomb is on its way out.

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, time

import email.MIMEMultipart, email.MIMEBase

import email.Utils, email.Encoders, email.Generator

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

from mercurial.i18n import _

from mercurial.node import bin

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

    if not ui.interactive():

        if default is not None:

            return default

        raise util.Abort(_("%s Please enter a valid value" % (prompt + rest)))

    if default:

        prompt += ' [%s]' % default

    prompt += rest

    while True:

        r = ui.prompt(prompt, default=default)

        if r:

            return r

        if default is not None:

            return default

        ui.warn(_('Please enter a valid value.\n'))

def cdiffstat(ui, summary, patchlines):

    s = patch.diffstat(patchlines)

    if summary:

        ui.write(summary, '\n')

        ui.write(s, '\n')

    ans = prompt(ui, _('does the diffstat above look okay?'), 'y')

    if not ans.lower().startswith('y'):

        raise util.Abort(_('diffstat rejected'))

    return s

def introneeded(opts, number):

    '''is an introductory message required?'''

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

def makepatch(ui, repo, patch, opts, _charsets, idx, total, patchname=None):

    desc = []

    node = None

    body = ''

    for line in patch:

        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'):

        body = ('\n'.join(desc[1:]).strip() or

                'Patch subject is complete summary.')

        body += '\n\n\n'

    if opts.get('plain'):

        while patch and patch[0].startswith('# '):

            patch.pop(0)

        if patch:

            patch.pop(0)

        while patch and not patch[0].strip():

            patch.pop(0)

    if opts.get('diffstat'):

        body += cdiffstat(ui, '\n'.join(desc), patch) + '\n\n'

    if opts.get('attach') or opts.get('inline'):

        msg = email.MIMEMultipart.MIMEMultipart()

        if body:

            msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))

        p = mail.mimetextpatch('\n'.join(patch), '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.make_filename(repo, '%b-%n.patch',

                                                  binnode, seqno=idx, total=total)

            else:

                patchname = cmdutil.make_filename(repo, '%b.patch', binnode)

        disposition = 'inline'

        if opts.get('attach'):

            disposition = 'attachment'

        p['Content-Disposition'] = disposition + '; filename=' + patchname

        msg.attach(p)

    else:

        body += '\n'.join(patch)

        msg = mail.mimetextpatch(body, display=opts.get('test'))

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

    if flag:

        flag = ' ' + flag

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

    if not introneeded(opts, total):

        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

    return msg, subj

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. Next, (optionally) if the diffstat program is

    installed and -d/--diffstat is used, the result of running

    diffstat on the patch. Finally, the patch itself, as generated by

    :hg:`export`.

    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.

    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.

    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

    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)

    def outgoing(dest, revs):

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

        dest = ui.expandpath(dest or 'default-push', dest or 'default')

        dest, branches = hg.parseurl(dest)

        revs, checkout = hg.addbranchrevs(repo, repo, branches, revs)

        if revs:

            revs = [repo.lookup(rev) for rev in revs]

        other = hg.repository(cmdutil.remoteui(repo, opts), dest)

        ui.status(_('comparing with %s\n') % dest)

        o = repo.findoutgoing(other)

        if not o:

            ui.status(_("no changes found\n"))

            return []

        o = repo.changelog.nodesbetween(o, revs)[0]

        return [str(repo.changelog.rev(r)) for r in o]

    def getpatches(revs):

        for r in cmdutil.revrange(repo, revs):

            output = cStringIO.StringIO()

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

                         opts=patch.diffopts(ui, opts))

            yield output.getvalue().split('\n')

    def getbundle(dest):

        tmpdir = tempfile.mkdtemp(prefix='hg-email-bundle-')

        tmpfn = os.path.join(tmpdir, 'bundle')

        try:

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

            return open(tmpfn, 'rb').read()

        finally:

            try:

                os.unlink(tmpfn)

            except:

                pass

            os.rmdir(tmpdir)

    if not (opts.get('test') or opts.get('mbox')):

        # really sending

        mail.validateconfig(ui)

    if not (revs or opts.get('rev')

            or opts.get('outgoing') or opts.get('bundle')

            or opts.get('patches')):

        raise util.Abort(_('specify at least one changeset with -r or -o'))

    if opts.get('outgoing') and opts.get('bundle'):

        raise util.Abort(_("--outgoing mode always on with --bundle;"

                           " do not re-specify --outgoing"))

    if opts.get('outgoing') or opts.get('bundle'):

        if len(revs) > 1:

            raise util.Abort(_("too many destinations"))

        dest = revs and revs[0] or None

        revs = []

    if opts.get('rev'):

        if revs:

            raise util.Abort(_('use only one form to specify the revision'))

        revs = opts.get('rev')

    if opts.get('outgoing'):

        revs = outgoing(dest, opts.get('rev'))

    if opts.get('bundle'):

        opts['revs'] = revs

    # start

    if opts.get('date'):

        start_time = util.parsedate(opts.get('date'))

    else:

        start_time = util.makedate()

    def genmsgid(id):

        return '<%s.%s@%s>' % (id[:20], int(start_time[0]), socket.getfqdn())

    def getdescription(body, sender):

        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(body, sender)

        return body

    def getpatchmsgs(patches, patchnames=None):

        jumbo = []

        msgs = []

        ui.write(_('This patch series consists of %d patches.\n\n')

                 % len(patches))

        name = None

        for i, p in enumerate(patches):

            jumbo.extend(p)

            if patchnames:

                name = patchnames[i]

            msg = makepatch(ui, repo, p, opts, _charsets, i + 1,

                            len(patches), name)

            msgs.append(msg)

        if introneeded(opts, len(patches)):

            tlen = len(str(len(patches)))

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

            if flag:

                subj = '[PATCH %0*d of %d %s]' % (tlen, 0, len(patches), flag)

            else:

                subj = '[PATCH %0*d of %d]' % (tlen, 0, len(patches))

            subj += ' ' + (opts.get('subject') or

                           prompt(ui, 'Subject: ', rest=subj))

            body = ''

            if opts.get('diffstat'):

                d = cdiffstat(ui, _('Final summary:\n'), jumbo)

                if d:

                    body = '\n' + d

            body = getdescription(body, sender)

            msg = mail.mimeencode(ui, body, _charsets, opts.get('test'))

            msg['Subject'] = mail.headencode(ui, subj, _charsets,

                                             opts.get('test'))

            msgs.insert(0, (msg, subj))

        return msgs

    def getbundlemsgs(bundle):

        subj = (opts.get('subject')

                or prompt(ui, 'Subject:', 'A bundle for your repository'))

        body = getdescription('', sender)

        msg = email.MIMEMultipart.MIMEMultipart()

        if body:

            msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))

        datapart = email.MIMEBase.MIMEBase('application', 'x-mercurial-bundle')

        datapart.set_payload(bundle)

        bundlename = '%s.hg' % opts.get('bundlename', 'bundle')