#!/usr/bin/python

#

# Interactive script for sending a collection of Mercurial 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 remainder of the changeset description.

#

#   If the diffstat program is installed, the result of running

#   diffstat on the patch.

#

#   The patch itself, as generated by "hg export".

#

# Each message refers to all of its predecessors 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.

#

# For each changeset, you will be prompted with a diffstat summary and

# the changeset summary, so you can be sure you are sending the right

# changes.

#

# It is best to run this script with the "-n" (test only) flag before

# firing it up "for real", in which case it will display each of the

# messages that it would send.

#

# To configure a default mail host, add a section like this to your

# hgrc file:

#

# [smtp]

# host = my_mail_host

# port = 1025

from email.MIMEMultipart import MIMEMultipart

from email.MIMEText import MIMEText

from mercurial import commands

from mercurial import fancyopts

from mercurial import hg

from mercurial import ui

import os

import popen2

import readline

import smtplib

import socket

import sys

import tempfile

import time

def diffstat(patch):

    fd, name = tempfile.mkstemp()

    try:

        p = popen2.Popen3('diffstat -p1 -w79 2>/dev/null > ' + name)

        try:

            for line in patch: print >> p.tochild, line

            p.tochild.close()

            if p.wait(): return

            fp = os.fdopen(fd, 'r')

            stat = []

            for line in fp: stat.append(line.lstrip())

            last = stat.pop()

            stat.insert(0, last)

            stat = ''.join(stat)

            if stat.startswith('0 files'): raise ValueError

            return stat

        except: raise

    finally:

        try: os.unlink(name)

        except: pass

def patchbomb(ui, repo, *revs, **opts):

    def prompt(prompt, default = None, rest = ': ', empty_ok = False):

            r = raw_input(prompt)

    def confirm(s):

        if not prompt(s, default = 'y', rest = '? ').lower().startswith('y'):

            raise ValueError

    def cdiffstat(summary, patch):

        s = diffstat(patch)

        if s:

            if summary:

                ui.write(summary, '\n')

                ui.write(s, '\n')

            confirm('Does the diffstat above look okay')

        return s

        desc = []

        node = None

        for line in patch:

            if line.startswith('#'):

                if line.startswith('# Node ID'): node = line.split()[-1]

                continue

            if line.startswith('diff -r'): break

            desc.append(line)

        if not node: raise ValueError

        subj = '[PATCH %d of %d] %s' % (idx, total, desc[0].strip())

        if subj.endswith('.'): subj = subj[:-1]

        msg['Subject'] = subj

        return msg

    start_time = int(time.time())

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

    patches = []

    class exportee:

        def __init__(self, container):

            self.lines = []

            self.container = container

        def write(self, data):

            self.lines.append(data)

        def close(self):

            self.container.append(''.join(self.lines).split('\n'))

            self.lines = []

    commands.export(ui, repo, *args, **{'output': exportee(patches)})

    jumbo = []

    msgs = []

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

    for p, i in zip(patches, range(len(patches))):

        jumbo.extend(p)

    ui.write('\nWrite the introductory message for the patch series.\n\n')

    sender = opts['sender'] or prompt('From', ui.username())

    msg = MIMEMultipart()

    msg['Subject'] = '[PATCH 0 of %d] %s' % (

        len(patches),

        prompt('Subject:', rest = ' [PATCH 0 of %d] ' % len(patches)))

    to = opts['to'] or [s.strip() for s in prompt('To').split(',')]

    cc = opts['cc'] or [s.strip() for s in prompt('Cc', default = '').split(',')]

    ui.write('Finish with ^D or a dot on a line by itself.\n\n')

    body = []

    while True:

        try: l = raw_input()

        except EOFError: break

        if l == '.': break

        body.append(l)

    msg.attach(MIMEText('\n'.join(body) + '\n'))

    ui.write('\n')

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

    if d: msg.attach(MIMEText(d))

    msgs.insert(0, msg)

    parent = None

    tz = time.strftime('%z')

    for m in msgs:

        try:

        except TypeError:

        if parent:

            m['In-Reply-To'] = parent

        m['Date'] = time.strftime('%a, %m %b %Y %T ', time.localtime(start_time)) + tz

        start_time += 1

        m['From'] = sender

        m['To'] = ', '.join(to)

        if cc: m['Cc'] = ', '.join(cc)

        ui.status('Sending ', m['Subject'], ' ...\n')

        if opts['test']:

            fp = os.popen(os.getenv('PAGER', 'more'), 'w')

            fp.write(m.as_string(0))

            fp.write('\n')

            fp.close()

        else:

            s.sendmail(sender, to + cc, m.as_string(0))

if __name__ == '__main__':

    optspec = [('c', 'cc', [], 'email addresses of copy recipients'),

               ('n', 'test', None, 'print messages that would be sent'),

               ('s', 'sender', '', 'email address of sender'),

               ('t', 'to', [], 'email addresses of recipients')]

    options = {}

    try:

        args = fancyopts.fancyopts(sys.argv[1:], commands.globalopts + optspec,

                                   options)

    except fancyopts.getopt.GetoptError, inst:

        u = ui.ui()

        u.warn('error: %s' % inst)

        sys.exit(1)

    u = ui.ui(options["verbose"], options["debug"], options["quiet"],

              not options["noninteractive"])

    repo = hg.repository(ui = u)

    patchbomb(u, repo, *args, **options)