mercurial/strutil.py

scmutil: add a function to mark that files have been operated on

Several places use scmutil.addremove as a means to declare that certain files
have been operated on. This is ugly because:
- addremove takes patterns relative to the cwd, not paths relative to the root,
  which means extra contortions for callers.
- addremove doesn't make clear what happens to files whose status hasn't
  changed.

This new method accepts filenames relative to the repo root, and has a much
clearer contract. It also allows future modifications that do more with files
whose status hasn't changed.

# 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