view contrib/simplemerge @ 42178:10b465d61556

rust-discovery: starting core implementation

Once exposed to the Python side, this core object will avoid
costly roundtrips with potentially big sets of revisions.

This changeset implements the core logic of the object only, i.e.,
manipulation of the missing, common and undefined set-like revision
attributes.

Differential Revision: https://phab.mercurial-scm.org/D6231

#!/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,
    pycompat,
    simplemerge,
    ui as uimod,
)
from mercurial.utils import (
    procutil,
)

options = [(b'L', b'label', [], _(b'labels to use on conflict markers')),
           (b'a', b'text', None, _(b'treat all files as text')),
           (b'p', b'print', None,
            _(b'print results instead of overwriting LOCAL')),
           (b'', b'no-minimal', None, _(b'no effect (DEPRECATED)')),
           (b'h', b'help', None, _(b'display help and exit')),
           (b'q', b'quiet', None, _(b'suppress output'))]

usage = _(b'''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():
    pycompat.stdout.write(usage)
    pycompat.stdout.write(b'\noptions:\n')

    out_opts = []
    for shortopt, longopt, default, desc in options:
        out_opts.append((b'%2s%s' % (shortopt and b'-%s' % shortopt,
                                     longopt and b' --%s' % longopt),
                         b'%s' % desc))
    opts_len = max([len(opt[0]) for opt in out_opts])
    for first, second in out_opts:
        pycompat.stdout.write(b' %-*s  %s\n' % (opts_len, first, second))

try:
    for fp in (sys.stdin, pycompat.stdout, sys.stderr):
        procutil.setbinary(fp)

    opts = {}
    try:
        bargv = [a.encode('utf8') for a in sys.argv[1:]]
        args = fancyopts.fancyopts(bargv, options, opts)
    except getopt.GetoptError as e:
        raise ParseError(e)
    if opts[b'help']:
        showhelp()
        sys.exit(0)
    if len(args) != 3:
            raise ParseError(_(b'wrong number of arguments').decode('utf8'))
    local, base, other = args
    sys.exit(simplemerge.simplemerge(uimod.ui.load(),
                                     context.arbitraryfilectx(local),
                                     context.arbitraryfilectx(base),
                                     context.arbitraryfilectx(other),
                                     **pycompat.strkwargs(opts)))
except ParseError as e:
    if pycompat.ispy3:
        e = str(e).encode('utf8')
    pycompat.stdout.write(b"%s: %s\n" % (sys.argv[0].encode('utf8'), e))
    showhelp()
    sys.exit(1)
except error.Abort as e:
    pycompat.stderr.write(b"abort: %s\n" % e)
    sys.exit(255)
except KeyboardInterrupt:
    sys.exit(255)