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grep: add stub class that maintains cache and states of grep operation...
grep: add stub class that maintains cache and states of grep operation Prepares for extracting stateful functions from commands.grep().

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grep.py
92 lines | 2.5 KiB | text/x-python | PythonLexer
# grep.py - logic for history walk and grep
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# 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 absolute_import
import difflib
from . import (
pycompat,
scmutil,
util,
)
def matchlines(body, regexp):
begin = 0
linenum = 0
while begin < len(body):
match = regexp.search(body, begin)
if not match:
break
mstart, mend = match.span()
linenum += body.count(b'\n', begin, mstart) + 1
lstart = body.rfind(b'\n', begin, mstart) + 1 or begin
begin = body.find(b'\n', mend) + 1 or len(body) + 1
lend = begin - 1
yield linenum, mstart - lstart, mend - lstart, body[lstart:lend]
class linestate(object):
def __init__(self, line, linenum, colstart, colend):
self.line = line
self.linenum = linenum
self.colstart = colstart
self.colend = colend
def __hash__(self):
return hash(self.line)
def __eq__(self, other):
return self.line == other.line
def findpos(self, regexp):
"""Iterate all (start, end) indices of matches"""
yield self.colstart, self.colend
p = self.colend
while p < len(self.line):
m = regexp.search(self.line, p)
if not m:
break
if m.end() == p:
p += 1
else:
yield m.span()
p = m.end()
def difflinestates(a, b):
sm = difflib.SequenceMatcher(None, a, b)
for tag, alo, ahi, blo, bhi in sm.get_opcodes():
if tag == 'insert':
for i in pycompat.xrange(blo, bhi):
yield (b'+', b[i])
elif tag == 'delete':
for i in pycompat.xrange(alo, ahi):
yield (b'-', a[i])
elif tag == 'replace':
for i in pycompat.xrange(alo, ahi):
yield (b'-', a[i])
for i in pycompat.xrange(blo, bhi):
yield (b'+', b[i])
class grepsearcher(object):
"""Search files and revisions for lines matching the given pattern"""
def __init__(self, ui, repo, regexp):
self._ui = ui
self._repo = repo
self._regexp = regexp
self._getfile = util.lrucachefunc(repo.file)
self._getrenamed = scmutil.getrenamedfn(repo)
self._matches = {}
self._copies = {}
self._skip = set()
self._revfiles = {}