x
/
daisycloud-core
Code Issues Proposed changes
daisycloud-core/patch.py

935 lines
29 KiB
Python
Raw Permalink Blame History

""" Patch utility to apply unified diffs
Brute-force line-by-line non-recursive parsing
Copyright (c) 2008-2011 anatoly techtonik
Available under the terms of MIT license
Project home: http://code.google.com/p/python-patch/
$Id: patch.py 150 2011-10-07 09:31:02Z techtonik $
$HeadURL: http://python-patch.googlecode.com/svn/trunk/patch.py $
MIT License
-----------
Copyright (c) 2008-2011 anatoly techtonik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
__author__ = "techtonik.rainforce.org"
__version__ = "1.11.10-dev"
import copy
import logging
import re
# cStringIO doesn't support unicode in 2.5
from StringIO import StringIO
import urllib2
from os.path import exists, isabs, isfile, abspath, normpath
import os
#------------------------------------------------
# Logging is controlled by logger named after the
# module name (e.g. 'patch' for patch.py module)
debugmode = False
logger = logging.getLogger(__name__)
debug = logger.debug
info = logger.info
warning = logger.warning
#------------------------------------------------
# constants for Patch/PatchSet types
DIFF = PLAIN = "plain"
GIT = "git"
HG = MERCURIAL = "mercurial"
SVN = SUBVERSION = "svn"
# mixed type is only actual when PatchSet contains
# Patches of different type
MIXED = MIXED = "mixed"
def fromfile(filename):
""" Parse patch file and return PatchSet() object
XXX error reporting
"""
debug("reading %s" % filename)
fp = open(filename, "rb")
patchset = PatchSet(fp)
fp.close()
return patchset
def fromstring(s):
""" Parse text string and return PatchSet() object
"""
return PatchSet( StringIO(s) )
def fromurl(url):
""" Read patch from URL
"""
return PatchSet( urllib2.urlopen(url) )
class Hunk(object):
""" Parsed hunk data container (hunk starts with @@ -R +R @@) """
def __init__(self):
self.startsrc=None #: line count starts with 1
self.linessrc=None
self.starttgt=None
self.linestgt=None
self.invalid=False
self.text=[]
# def apply(self, estream):
# """ write hunk data into enumerable stream
# return strings one by one until hunk is
# over
#
# enumerable stream are tuples (lineno, line)
# where lineno starts with 0
# """
# pass
class Patch(object):
""" Patch for a single file """
def __init__(self):
self.source = None
self.target = None
self.hunks = []
self.hunkends = []
self.header = []
self.type = None
class PatchSet(object):
def __init__(self, stream=None):
self.name = None # descriptive name of the PatchSet
# list of Patch objects
self.items = []
#: patch set type - one of constants
self.type = None
if stream:
self.parse(stream)
def __len__(self):
return len(self.items)
def parse(self, stream):
""" parse unified diff
return True on success
"""
lineends = dict(lf=0, crlf=0, cr=0)
nexthunkno = 0 #: even if index starts with 0 user messages number hunks from 1
p = None
hunk = None
# hunkactual variable is used to calculate hunk lines for comparison
hunkactual = dict(linessrc=None, linestgt=None)
class wrapumerate(enumerate):
"""Enumerate wrapper that uses boolean end of stream status instead of
StopIteration exception, and properties to access line information.
"""
def __init__(self, *args, **kwargs):
# we don't call parent, it is magically created by __new__ method
self._exhausted = False
self._lineno = False # after end of stream equal to the num of lines
self._line = False # will be reset to False after end of stream
def next(self):
"""Try to read the next line and return True if it is available,
False if end of stream is reached."""
if self._exhausted:
return False
try:
self._lineno, self._line = super(wrapumerate, self).next()
except StopIteration:
self._exhausted = True
self._line = False
return False
return True
@property
def is_empty(self):
return self._exhausted
@property
def line(self):
return self._line
@property
def lineno(self):
return self._lineno
# define states (possible file regions) that direct parse flow
headscan = True # start with scanning header
filenames = False # lines starting with --- and +++
hunkhead = False # @@ -R +R @@ sequence
hunkbody = False #
hunkskip = False # skipping invalid hunk mode
hunkparsed = False # state after successfully parsed hunk
# regexp to match start of hunk, used groups - 1,3,4,6
re_hunk_start = re.compile("^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))?")
errors = 0
# temp buffers for header and filenames info
header = []
srcname = None
tgtname = None
# start of main cycle
# each parsing block already has line available in fe.line
fe = wrapumerate(stream)
while fe.next():
# -- deciders: these only switch state to decide who should process
# -- line fetched at the start of this cycle
if hunkparsed:
hunkparsed = False
if re_hunk_start.match(fe.line):
hunkhead = True
elif fe.line.startswith("--- "):
filenames = True
else:
headscan = True
# -- ------------------------------------
# read out header
if headscan:
while not fe.is_empty and not fe.line.startswith("--- "):
header.append(fe.line)
fe.next()
if fe.is_empty:
if p == None:
errors += 1
warning("warning: no patch data is found")
else:
info("%d unparsed bytes left at the end of stream" % len(''.join(header)))
# TODO check for \No new line at the end..
# TODO test for unparsed bytes
# otherwise error += 1
# this is actually a loop exit
continue
headscan = False
# switch to filenames state
filenames = True
line = fe.line
lineno = fe.lineno
# hunkskip and hunkbody code skipped until definition of hunkhead is parsed
if hunkbody:
# process line first
if re.match(r"^[- \+\\]", line):
# gather stats about line endings
if line.endswith("\r\n"):
p.hunkends["crlf"] += 1
elif line.endswith("\n"):
p.hunkends["lf"] += 1
elif line.endswith("\r"):
p.hunkends["cr"] += 1
if line.startswith("-"):
hunkactual["linessrc"] += 1
elif line.startswith("+"):
hunkactual["linestgt"] += 1
elif not line.startswith("\\"):
hunkactual["linessrc"] += 1
hunkactual["linestgt"] += 1
hunk.text.append(line)
# todo: handle \ No newline cases
else:
warning("invalid hunk no.%d at %d for target file %s" % (nexthunkno, lineno+1, p.target))
# add hunk status node
hunk.invalid = True
p.hunks.append(hunk)
errors += 1
# switch to hunkskip state
hunkbody = False
hunkskip = True
# check exit conditions
if hunkactual["linessrc"] > hunk.linessrc or hunkactual["linestgt"] > hunk.linestgt:
warning("extra lines for hunk no.%d at %d for target %s" % (nexthunkno, lineno+1, p.target))
# add hunk status node
hunk.invalid = True
p.hunks.append(hunk)
errors += 1
# switch to hunkskip state
hunkbody = False
hunkskip = True
elif hunk.linessrc == hunkactual["linessrc"] and hunk.linestgt == hunkactual["linestgt"]:
# hunk parsed successfully
p.hunks.append(hunk)
# switch to hunkparsed state
hunkbody = False
hunkparsed = True
# detect mixed window/unix line ends
ends = p.hunkends
if ((ends["cr"]!=0) + (ends["crlf"]!=0) + (ends["lf"]!=0)) > 1:
warning("inconsistent line ends in patch hunks for %s" % p.source)
if debugmode:
debuglines = dict(ends)
debuglines.update(file=p.target, hunk=nexthunkno)
debug("crlf: %(crlf)d lf: %(lf)d cr: %(cr)d\t - file: %(file)s hunk: %(hunk)d" % debuglines)
# fetch next line
continue
if hunkskip:
if re_hunk_start.match(line):
# switch to hunkhead state
hunkskip = False
hunkhead = True
elif line.startswith("--- "):
# switch to filenames state
hunkskip = False
filenames = True
if debugmode and len(self.items) > 0:
debug("- %2d hunks for %s" % (len(p.hunks), p.source))
if filenames:
if line.startswith("--- "):
if srcname != None:
# XXX testcase
warning("skipping false patch for %s" % srcname)
srcname = None
# XXX header += srcname
# double source filename line is encountered
# attempt to restart from this second line
re_filename = "^--- ([^\t]+)"
match = re.match(re_filename, line)
# todo: support spaces in filenames
if match:
srcname = match.group(1).strip()
else:
warning("skipping invalid filename at line %d" % lineno)
errors += 1
# XXX p.header += line
# switch back to headscan state
filenames = False
headscan = True
elif not line.startswith("+++ "):
if srcname != None:
warning("skipping invalid patch with no target for %s" % srcname)
errors += 1
srcname = None
# XXX header += srcname
# XXX header += line
else:
# this should be unreachable
warning("skipping invalid target patch")
filenames = False
headscan = True
else:
if tgtname != None:
# XXX seems to be a dead branch
warning("skipping invalid patch - double target at line %d" % lineno)
errors += 1
srcname = None
tgtname = None
# XXX header += srcname
# XXX header += tgtname
# XXX header += line
# double target filename line is encountered
# switch back to headscan state
filenames = False
headscan = True
else:
re_filename = "^\+\+\+ ([^\t]+)"
match = re.match(re_filename, line)
if not match:
warning("skipping invalid patch - no target filename at line %d" % lineno)
errors += 1
srcname = None
# switch back to headscan state
filenames = False
headscan = True
else:
if p: # for the first run p is None
self.items.append(p)
p = Patch()
p.source = srcname
srcname = None
p.target = match.group(1).strip()
p.header = header
header = []
# switch to hunkhead state
filenames = False
hunkhead = True
nexthunkno = 0
p.hunkends = lineends.copy()
continue
if hunkhead:
match = re.match("^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))?", line)
if not match:
if not p.hunks:
warning("skipping invalid patch with no hunks for file %s" % p.source)
errors += 1
# XXX review switch
# switch to headscan state
hunkhead = False
headscan = True
continue
else:
# TODO review condition case
# switch to headscan state
hunkhead = False
headscan = True
else:
hunk = Hunk()
hunk.startsrc = int(match.group(1))
hunk.linessrc = 1
if match.group(3): hunk.linessrc = int(match.group(3))
hunk.starttgt = int(match.group(4))
hunk.linestgt = 1
if match.group(6): hunk.linestgt = int(match.group(6))
hunk.invalid = False
hunk.text = []
hunkactual["linessrc"] = hunkactual["linestgt"] = 0
# switch to hunkbody state
hunkhead = False
hunkbody = True
nexthunkno += 1
continue
self.items.append(p)
if not hunkparsed:
if hunkskip:
warning("warning: finished with warnings, some hunks may be invalid")
elif headscan:
if len(self.items) == 0:
warning("error: no patch data found!")
# ? sys.exit(-1)
else: # extra data at the end of file
pass
else:
warning("error: patch stream is incomplete!")
errors += 1
if debugmode and len(self.items) > 0:
debug("- %2d hunks for %s" % (len(p.hunks), p.source))
# XXX fix total hunks calculation
debug("total files: %d total hunks: %d" % (len(self.items),
sum(len(p.hunks) for p in self.items)))
# ---- detect patch and patchset types ----
for idx, p in enumerate(self.items):
self.items[idx].type = self._detect_type(p)
types = set([p.type for p in self.items])
if len(types) > 1:
self.type = MIXED
else:
self.type = types.pop()
# --------
if not self._normalize_filenames():
errors += 1
return (errors == 0)
def _detect_type(self, p):
""" detect and return type for the specified Patch object
analyzes header and filenames info
NOTE: must be run before filenames are normalized
"""
# check for SVN
# - header starts with Index:
# - next line is ===... delimiter
# - filename is followed by revision number
# TODO add SVN revision
if (len(p.header) > 1 and p.header[-2].startswith("Index: ")
and p.header[-1].startswith("="*67)):
return SVN
# GIT type check
# - header[-2] is like "diff --git a/oldname b/newname"
# - header[-1] is like "index <hash>..<hash> <mode>"
# TODO add git rename diffs and add/remove diffs
# add git diff with spaced filename
# TODO http://www.kernel.org/pub/software/scm/git/docs/git-diff.html
# detect the start of diff header - there might be some comments before
for idx in reversed(range(len(p.header))):
if p.header[idx].startswith("diff --git"):
break
if len(p.header) > 1 and re.match(r'diff --git a/[\w/.]+ b/[\w/.]+', p.header[idx]):
if re.match(r'index \w{7}..\w{7} \d{6}', p.header[idx+1]):
if p.source.startswith('a/') and p.target.startswith('b/'):
return GIT
# HG check
# - Patch header is like "diff -r b2d9961ff1f5 filename"
# - filename starts with a/, b/ or is equal to /dev/null
# TODO add MQ version
if len(p.header) > 0 and re.match(r'diff -r \w{12} .*', p.header[-1]):
if ((p.source.startswith('a/') or p.source == '/dev/null')
and (p.target.startswith('b/') or p.target == '/dev/null')):
return HG
return PLAIN
def _normalize_filenames(self):
""" sanitize filenames, normalizing paths
TODO think about using forward slashes for crossplatform issues
(diff/patch were born as a unix utility after all)
return True on success
"""
errors = 0
for i,p in enumerate(self.items):
if p.type in (HG, GIT):
# TODO: figure out how to deal with /dev/null entries
debug("stripping a/ and b/ prefixes")
if p.source != '/dev/null':
if not p.source.startswith("a/"):
warning("invalid source filename")
else:
p.source = p.source[2:]
if p.target != '/dev/null':
if not p.target.startswith("b/"):
warning("invalid target filename")
else:
p.target = p.target[2:]
p.source = normpath(p.source)
p.target = normpath(p.target)
# references to parent are not allowed
if p.source.startswith(".." + os.sep):
warning("error: stripping parent path for source file patch no.%d" % (i+1))
errors += 1
while p.source.startswith(".." + os.sep):
p.source = p.source.partition(os.sep)[2]
if p.target.startswith(".." + os.sep):
warning("error: stripping parent path for target file patch no.%d" % (i+1))
errors += 1
while p.target.startswith(".." + os.sep):
p.target = p.target.partition(os.sep)[2]
# absolute paths are not allowed
if isabs(p.source) or isabs(p.target):
errors += 1
warning("error: absolute paths are not allowed for file patch no.%d" % (i+1))
if isabs(p.source):
p.source = p.source.partition(os.sep)[2]
if isabs(p.target):
p.target = p.target.partition(os.sep)[2]
self.items[i].source = p.source
self.items[i].target = p.target
return (errors == 0)
def diffstat(self):
""" calculate diffstat and return as a string
Notes:
- original diffstat ouputs target filename
- single + or - shouldn't escape histogram
"""
names = []
insert = []
delete = []
namelen = 0
maxdiff = 0 # max number of changes for single file
# (for histogram width calculation)
for patch in self.items:
i,d = 0,0
for hunk in patch.hunks:
for line in hunk.text:
if line.startswith('+'):
i += 1
elif line.startswith('-'):
d += 1
names.append(patch.target)
insert.append(i)
delete.append(d)
namelen = max(namelen, len(patch.target))
maxdiff = max(maxdiff, i+d)
output = ''
statlen = len(str(maxdiff)) # stats column width
for i,n in enumerate(names):
# %-19s | %-4d %s
format = " %-" + str(namelen) + "s | %" + str(statlen) + "s %s\n"
hist = ''
# -- calculating histogram --
width = len(format % ('', '', ''))
histwidth = max(2, 80 - width)
if maxdiff < histwidth:
hist = "+"*insert[i] + "-"*delete[i]
else:
iratio = (float(insert[i]) / maxdiff) * histwidth
dratio = (float(delete[i]) / maxdiff) * histwidth
# make sure every entry gets at least one + or -
iwidth = 1 if 0 < iratio < 1 else int(iratio)
dwidth = 1 if 0 < dratio < 1 else int(dratio)
#print iratio, dratio, iwidth, dwidth, histwidth
hist = "+"*int(iwidth) + "-"*int(dwidth)
# -- /calculating +- histogram --
output += (format % (names[i], insert[i] + delete[i], hist))
output += (" %d files changed, %d insertions(+), %d deletions(-)"
% (len(names), sum(insert), sum(delete)))
return output
def apply(self):
""" apply parsed patch
return True on success
"""
total = len(self.items)
errors = 0
#for fileno, filename in enumerate(self.source):
for i,p in enumerate(self.items):
f2patch = p.source
if not exists(f2patch):
f2patch = p.target
if not exists(f2patch):
warning("source/target file does not exist\n--- %s\n+++ %s" % (p.source, f2patch))
errors += 1
continue
if not isfile(f2patch):
warning("not a file - %s" % f2patch)
errors += 1
continue
filename = f2patch
debug("processing %d/%d:\t %s" % (i+1, total, filename))
# validate before patching
f2fp = open(filename)
hunkno = 0
hunk = p.hunks[hunkno]
hunkfind = []
hunkreplace = []
validhunks = 0
canpatch = False
for lineno, line in enumerate(f2fp):
if lineno+1 < hunk.startsrc:
continue
elif lineno+1 == hunk.startsrc:
hunkfind = [x[1:].rstrip("\r\n") for x in hunk.text if x[0] in " -"]
hunkreplace = [x[1:].rstrip("\r\n") for x in hunk.text if x[0] in " +"]
#pprint(hunkreplace)
hunklineno = 0
# todo \ No newline at end of file
# check hunks in source file
if lineno+1 < hunk.startsrc+len(hunkfind)-1:
if line.rstrip("\r\n") == hunkfind[hunklineno]:
hunklineno+=1
else:
info("file %d/%d:\t %s" % (i+1, total, filename))
info(" hunk no.%d doesn't match source file at line %d" % (hunkno+1, lineno))
info(" expected: %s" % hunkfind[hunklineno])
info(" actual : %s" % line.rstrip("\r\n"))
# not counting this as error, because file may already be patched.
# check if file is already patched is done after the number of
# invalid hunks if found
# TODO: check hunks against source/target file in one pass
# API - check(stream, srchunks, tgthunks)
# return tuple (srcerrs, tgterrs)
# continue to check other hunks for completeness
hunkno += 1
if hunkno < len(p.hunks):
hunk = p.hunks[hunkno]
continue
else:
break
# check if processed line is the last line
if lineno+1 == hunk.startsrc+len(hunkfind)-1:
debug(" hunk no.%d for file %s -- is ready to be patched" % (hunkno+1, filename))
hunkno+=1
validhunks+=1
if hunkno < len(p.hunks):
hunk = p.hunks[hunkno]
else:
if validhunks == len(p.hunks):
# patch file
canpatch = True
break
else:
if hunkno < len(p.hunks):
warning("premature end of source file %s at hunk %d" % (filename, hunkno+1))
errors += 1
f2fp.close()
if validhunks < len(p.hunks):
if self._match_file_hunks(filename, p.hunks):
warning("already patched %s" % filename)
else:
warning("source file is different - %s" % filename)
errors += 1
if canpatch:
backupname = filename+".orig"
if exists(backupname):
warning("can't backup original file to %s - aborting" % backupname)
else:
import shutil
shutil.move(filename, backupname)
if self.write_hunks(backupname, filename, p.hunks):
info("successfully patched %d/%d:\t %s" % (i+1, total, filename))
os.unlink(backupname)
else:
errors += 1
warning("error patching file %s" % filename)
shutil.copy(filename, filename+".invalid")
warning("invalid version is saved to %s" % filename+".invalid")
# todo: proper rejects
shutil.move(backupname, filename)
# todo: check for premature eof
return (errors == 0)
def can_patch(self, filename):
""" Check if specified filename can be patched. Returns None if file can
not be found among source filenames. False if patch can not be applied
clearly. True otherwise.
:returns: True, False or None
"""
filename = abspath(filename)
for p in self.items:
if filename == abspath(p.source):
return self._match_file_hunks(filename, p.hunks)
return None
def _match_file_hunks(self, filepath, hunks):
matched = True
fp = open(abspath(filepath))
class NoMatch(Exception):
pass
lineno = 1
line = fp.readline()
hno = None
try:
for hno, h in enumerate(hunks):
# skip to first line of the hunk
while lineno < h.starttgt:
if not len(line): # eof
debug("check failed - premature eof before hunk: %d" % (hno+1))
raise NoMatch
line = fp.readline()
lineno += 1
for hline in h.text:
if hline.startswith("-"):
continue
if not len(line):
debug("check failed - premature eof on hunk: %d" % (hno+1))
# todo: \ No newline at the end of file
raise NoMatch
if line.rstrip("\r\n") != hline[1:].rstrip("\r\n"):
debug("file is not patched - failed hunk: %d" % (hno+1))
raise NoMatch
line = fp.readline()
lineno += 1
except NoMatch:
matched = False
# todo: display failed hunk, i.e. expected/found
fp.close()
return matched
def patch_stream(self, instream, hunks):
""" Generator that yields stream patched with hunks iterable
Converts lineends in hunk lines to the best suitable format
autodetected from input
"""
# todo: At the moment substituted lineends may not be the same
# at the start and at the end of patching. Also issue a
# warning/throw about mixed lineends (is it really needed?)
hunks = iter(hunks)
srclineno = 1
lineends = {'\n':0, '\r\n':0, '\r':0}
def get_line():
"""
local utility function - return line from source stream
collecting line end statistics on the way
"""
line = instream.readline()
# 'U' mode works only with text files
if line.endswith("\r\n"):
lineends["\r\n"] += 1
elif line.endswith("\n"):
lineends["\n"] += 1
elif line.endswith("\r"):
lineends["\r"] += 1
return line
for hno, h in enumerate(hunks):
debug("hunk %d" % (hno+1))
# skip to line just before hunk starts
while srclineno < h.startsrc:
yield get_line()
srclineno += 1
for hline in h.text:
# todo: check \ No newline at the end of file
if hline.startswith("-") or hline.startswith("\\"):
get_line()
srclineno += 1
continue
else:
if not hline.startswith("+"):
get_line()
srclineno += 1
line2write = hline[1:]
# detect if line ends are consistent in source file
if sum([bool(lineends[x]) for x in lineends]) == 1:
newline = [x for x in lineends if lineends[x] != 0][0]
yield line2write.rstrip("\r\n")+newline
else: # newlines are mixed
yield line2write
for line in instream:
yield line
def write_hunks(self, srcname, tgtname, hunks):
src = open(srcname, "rb")
tgt = open(tgtname, "wb")
debug("processing target file %s" % tgtname)
tgt.writelines(self.patch_stream(src, hunks))
tgt.close()
src.close()
return True
if __name__ == "__main__":
from optparse import OptionParser
from os.path import exists
import sys
opt = OptionParser(usage="1. %prog [options] unified.diff\n"
" 2. %prog [options] http://host/patch\n"
" 3. %prog [options] -- < unified.diff",
version="python-patch %s" % __version__)
opt.add_option("-q", "--quiet", action="store_const", dest="verbosity",
const=0, help="print only warnings and errors", default=1)
opt.add_option("-v", "--verbose", action="store_const", dest="verbosity",
const=2, help="be verbose")
opt.add_option("--diffstat", action="store_true", dest="diffstat",
help="print diffstat and exit")
opt.add_option("--debug", action="store_true", dest="debugmode", help="debug mode")
(options, args) = opt.parse_args()
if not args and sys.argv[-1:] != ['--']:
opt.print_version()
opt.print_help()
sys.exit()
readstdin = (sys.argv[-1:] == ['--'] and not args)
debugmode = options.debugmode
verbosity_levels = {0:logging.WARNING, 1:logging.INFO, 2:logging.DEBUG}
loglevel = verbosity_levels[options.verbosity]
logformat = "%(message)s"
if debugmode:
loglevel = logging.DEBUG
logformat = "%(levelname)8s %(message)s"
logger.setLevel(loglevel)
loghandler = logging.StreamHandler()
loghandler.setFormatter(logging.Formatter(logformat))
logger.addHandler(loghandler)
if readstdin:
patch = PatchSet(sys.stdin)
else:
patchfile = args[0]
urltest = patchfile.split(':')[0]
if (':' in patchfile and urltest.isalpha()
and len(urltest) > 1): # one char before : is a windows drive letter
patch = fromurl(patchfile)
else:
if not exists(patchfile) or not isfile(patchfile):
sys.exit("patch file does not exist - %s" % patchfile)
patch = fromfile(patchfile)
if options.diffstat:
print patch.diffstat()
sys.exit(0)
#pprint(patch)
patch.apply() or sys.exit(-1)
# todo: document and test line ends handling logic - patch.py detects proper line-endings
# for inserted hunks and issues a warning if patched file has incosistent line ends
View Git Blame Copy Permalink