view mercurial/cffi/mpatch.py @ 52154:6ca0771b32ef stable

tests: disable `test-git-interop.t` with a requirements directive

Note that the failures in this test affect all platforms.

I don't like this, but the test has been broken for awhile because of dirstate
API changes, and nobody noticed because the required `pygit2` package isn't
installed on the CI systems.  I did install it on the mac CI system, which
triggers this failure.  Disabling it is no worse than not running it due to the
missing package, but at least this way the CI systems can get the package
installed, and the test can be enabled and fixed eventually, without needing to
alter the CI systems.

The feature here is kind of abused.  I thought about adding one specifically to
test for CI, but didn't feel like doing it at this point.  Maybe if we need to
disable things to get the Windows CI off the ground (but that likely requires
testing for CI + platform).

# mpatch.py - CFFI implementation of mpatch.c
#
# Copyright 2016 Maciej Fijalkowski <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import annotations

from typing import List

from ..pure.mpatch import *
from ..pure.mpatch import mpatchError  # silence pyflakes
from . import _mpatch  # pytype: disable=import-error

ffi = _mpatch.ffi
lib = _mpatch.lib


@ffi.def_extern()
def cffi_get_next_item(arg, pos):
    all, bins = ffi.from_handle(arg)
    container = ffi.new("struct mpatch_flist*[1]")
    to_pass = ffi.new("char[]", bytes(bins[pos]))
    all.append(to_pass)
    r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)
    if r < 0:
        return ffi.NULL
    return container[0]


def patches(text: bytes, bins: List[bytes]) -> bytes:
    lgt = len(bins)
    all = []
    if not lgt:
        return text
    arg = (all, bins)
    patch = lib.mpatch_fold(ffi.new_handle(arg), lib.cffi_get_next_item, 0, lgt)
    if not patch:
        raise mpatchError(b"cannot decode chunk")
    outlen = lib.mpatch_calcsize(len(text), patch)
    if outlen < 0:
        lib.mpatch_lfree(patch)
        raise mpatchError(b"inconsistency detected")
    buf = ffi.new("char[]", outlen)
    if lib.mpatch_apply(buf, text, len(text), patch) < 0:
        lib.mpatch_lfree(patch)
        raise mpatchError(b"error applying patches")
    res = ffi.buffer(buf, outlen)[:]
    lib.mpatch_lfree(patch)
    return res