#!/usr/bin/env python

from __future__ import absolute_import

import getopt

import sys

import hgdemandimport

hgdemandimport.enable()

from mercurial.i18n import _

from mercurial import (

    context,

    error,

    fancyopts,

    simplemerge,

    ui as uimod,

)

from mercurial.utils import (

    procutil,

)

options = [('L', 'label', [], _('labels to use on conflict markers')),

           ('a', 'text', None, _('treat all files as text')),

           ('p', 'print', None,

            _('print results instead of overwriting LOCAL')),

           ('', 'no-minimal', None, _('no effect (DEPRECATED)')),

           ('h', 'help', None, _('display help and exit')),

           ('q', 'quiet', None, _('suppress output'))]

usage = _('''simplemerge [OPTS] LOCAL BASE OTHER

    Simple three-way file merge utility with a minimal feature set.

    Apply to LOCAL the changes necessary to go from BASE to OTHER.

    By default, LOCAL is overwritten with the results of this operation.

''')

class ParseError(Exception):

    """Exception raised on errors in parsing the command line."""

def showhelp():

    sys.stdout.write(usage)

    sys.stdout.write('\noptions:\n')

    out_opts = []

    for shortopt, longopt, default, desc in options:

        out_opts.append(('%2s%s' % (shortopt and '-%s' % shortopt,

                                    longopt and ' --%s' % longopt),

                         '%s' % desc))

    opts_len = max([len(opt[0]) for opt in out_opts])

    for first, second in out_opts:

        sys.stdout.write(' %-*s  %s\n' % (opts_len, first, second))

try:

    for fp in (sys.stdin, sys.stdout, sys.stderr):

        procutil.setbinary(fp)

    opts = {}

    try:

        args = fancyopts.fancyopts(sys.argv[1:], options, opts)

    except getopt.GetoptError as e:

        raise ParseError(e)

    if opts['help']:

        showhelp()

        sys.exit(0)

    if len(args) != 3:

            raise ParseError(_('wrong number of arguments'))

    local, base, other = args

    sys.exit(simplemerge.simplemerge(uimod.ui.load(),

                                     context.arbitraryfilectx(local),

                                     context.arbitraryfilectx(base),

                                     context.arbitraryfilectx(other),

                                     **opts))

except ParseError as e:

    sys.stdout.write("%s: %s\n" % (sys.argv[0], e))

    showhelp()

    sys.exit(1)

except error.Abort as e:

    sys.stderr.write("abort: %s\n" % e)

    sys.exit(255)

except KeyboardInterrupt:

    sys.exit(255)