view mercurial/strutil.py @ 21989:bdb6d97f0a04

getbundle: add a ``cg`` boolean argument to control changegroup inclusion

The ``getbundle`` function was initially design to return a changegroup bundle.
However, bundle2 allows transmitting a wide range of data. Some bundle2
requests may not include a changegroup at all.

Before this changeset, the client would request a changegroup for
``heads=[nullid]`` and receive an empty changegroup.

We introduce an official boolean parameter, ``cg``, that can be set
to false to disable changegroup generation on getbundle. A new bundle2
capability is introduced to let the client know.

# strutil.py - string utilities for Mercurial
#
# Copyright 2006 Vadim Gelfer <[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.

def findall(haystack, needle, start=0, end=None):
    if end is None:
        end = len(haystack)
    if end < 0:
        end += len(haystack)
    if start < 0:
        start += len(haystack)
    while start < end:
        c = haystack.find(needle, start, end)
        if c == -1:
            break
        yield c
        start = c + 1

def rfindall(haystack, needle, start=0, end=None):
    if end is None:
        end = len(haystack)
    if end < 0:
        end += len(haystack)
    if start < 0:
        start += len(haystack)
    while end >= 0:
        c = haystack.rfind(needle, start, end)
        if c == -1:
            break
        yield c
        end = c - 1