mirror of
https://gitlab.winehq.org/wine/wine-staging.git
synced 2024-09-13 09:17:20 -07:00
947 lines
37 KiB
Python
947 lines
37 KiB
Python
#!/usr/bin/python2
|
|
#
|
|
# Python functions to read, split and apply patches.
|
|
#
|
|
# Copyright (C) 2014-2016 Sebastian Lackner
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this library; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
#
|
|
|
|
import collections
|
|
import difflib
|
|
import email.header
|
|
import hashlib
|
|
import itertools
|
|
import os
|
|
import re
|
|
import shutil
|
|
import subprocess
|
|
import sys
|
|
import tempfile
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
from io import StringIO
|
|
|
|
_devnull = open(os.devnull, 'wb')
|
|
|
|
class PatchParserError(RuntimeError):
|
|
"""Unable to parse patch file - either an unimplemented feature, or corrupted patch."""
|
|
pass
|
|
|
|
class PatchApplyError(RuntimeError):
|
|
"""Failed to apply/merge patch."""
|
|
pass
|
|
|
|
class PatchDiffError(RuntimeError):
|
|
"""Failed to compute diff."""
|
|
pass
|
|
|
|
class CParserError(RuntimeError):
|
|
"""Unable to parse C source."""
|
|
pass
|
|
|
|
class PatchObject(object):
|
|
def __init__(self, filename, header):
|
|
self.patch_author = header.get('author', None)
|
|
self.patch_email = header.get('email', None)
|
|
self.patch_subject = header.get('subject', None)
|
|
self.patch_revision = header.get('revision', 1)
|
|
self.signed_off_by = header.get('signedoffby', [])
|
|
|
|
self.filename = filename
|
|
self.offset_begin = None
|
|
self.offset_end = None
|
|
self.is_binary = False
|
|
|
|
self.oldname = None
|
|
self.newname = None
|
|
self.modified_file = None
|
|
|
|
self.oldsha1 = None
|
|
self.newsha1 = None
|
|
self.newmode = None
|
|
|
|
def read_chunks(self):
|
|
"""Iterates over arbitrary sized chunks of this patch."""
|
|
assert self.offset_end >= self.offset_begin
|
|
with open(self.filename) as fp:
|
|
fp.seek(self.offset_begin)
|
|
i = self.offset_end - self.offset_begin
|
|
while i > 0:
|
|
buf = fp.read(16384 if i > 16384 else i)
|
|
if buf == "": raise IOError("Unable to extract patch.")
|
|
yield buf
|
|
i -= len(buf)
|
|
|
|
def read(self):
|
|
"""Return the full patch as a string."""
|
|
return "".join(chunk for chunk in self.read_chunks())
|
|
|
|
class _PatchReader(object):
|
|
def __init__(self, filename, fp=None):
|
|
self.filename = filename
|
|
self.fp = fp if fp is not None else open(filename)
|
|
self.peeked = None
|
|
|
|
def close(self):
|
|
self.fp.close()
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, type, value, traceback):
|
|
self.close()
|
|
|
|
def seek(self, pos):
|
|
"""Change the file cursor position."""
|
|
self.fp.seek(pos)
|
|
self.peeked = None
|
|
|
|
def tell(self):
|
|
"""Return the current file cursor position."""
|
|
if self.peeked is None:
|
|
return self.fp.tell()
|
|
return self.peeked[0]
|
|
|
|
def peek(self):
|
|
"""Read one line without changing the file cursor."""
|
|
if self.peeked is None:
|
|
pos = self.fp.tell()
|
|
tmp = self.fp.readline()
|
|
if len(tmp) == 0: return None
|
|
self.peeked = (pos, tmp)
|
|
return self.peeked[1]
|
|
|
|
def read(self):
|
|
"""Read one line from the file, and move the file cursor to the next line."""
|
|
if self.peeked is None:
|
|
tmp = self.fp.readline()
|
|
if len(tmp) == 0: return None
|
|
return tmp
|
|
tmp, self.peeked = self.peeked, None
|
|
return tmp[1]
|
|
|
|
def read_hunk(self):
|
|
"""Read one hunk from a patch file."""
|
|
line = self.peek()
|
|
if line is None or not line.startswith("@@ -"):
|
|
return None
|
|
|
|
r = re.match("^@@ -(([0-9]+),)?([0-9]+) \+(([0-9]+),)?([0-9]+) @@", line)
|
|
if not r: raise PatchParserError("Unable to parse hunk header '%s'." % line)
|
|
srcpos = max(int(r.group(2)) - 1, 0) if r.group(2) else 0
|
|
dstpos = max(int(r.group(5)) - 1, 0) if r.group(5) else 0
|
|
srclines, dstlines = int(r.group(3)), int(r.group(6))
|
|
if srclines <= 0 and dstlines <= 0:
|
|
raise PatchParserError("Empty hunk doesn't make sense.")
|
|
self.read()
|
|
|
|
srcdata = []
|
|
dstdata = []
|
|
|
|
try:
|
|
while srclines > 0 or dstlines > 0:
|
|
line = self.read().rstrip("\n")
|
|
if line[0] == " ":
|
|
if srclines == 0 or dstlines == 0:
|
|
raise PatchParserError("Corrupted patch.")
|
|
srcdata.append(line[1:])
|
|
dstdata.append(line[1:])
|
|
srclines -= 1
|
|
dstlines -= 1
|
|
elif line[0] == "-":
|
|
if srclines == 0:
|
|
raise PatchParserError("Corrupted patch.")
|
|
srcdata.append(line[1:])
|
|
srclines -= 1
|
|
elif line[0] == "+":
|
|
if dstlines == 0:
|
|
raise PatchParserError("Corrupted patch.")
|
|
dstdata.append(line[1:])
|
|
dstlines -= 1
|
|
elif line[0] == "\\":
|
|
pass # ignore
|
|
else:
|
|
raise PatchParserError("Unexpected line in hunk.")
|
|
except IndexError: # triggered by ""[0]
|
|
raise PatchParserError("Truncated patch.")
|
|
|
|
while True:
|
|
line = self.peek()
|
|
if line is None or not line.startswith("\\ "): break
|
|
self.read()
|
|
|
|
return (srcpos, srcdata, dstpos, dstdata)
|
|
|
|
def _read_single_patch(fp, header, oldname=None, newname=None):
|
|
"""Internal function to read a single patch from a file."""
|
|
|
|
patch = PatchObject(fp.filename, header)
|
|
patch.offset_begin = fp.tell()
|
|
patch.oldname = oldname
|
|
patch.newname = newname
|
|
|
|
# Skip over initial diff --git header
|
|
line = fp.peek()
|
|
if line.startswith("diff --git "):
|
|
fp.read()
|
|
|
|
# Read header
|
|
while True:
|
|
line = fp.peek()
|
|
if line is None:
|
|
break
|
|
|
|
elif line.startswith("--- "):
|
|
patch.oldname = line[4:].strip()
|
|
|
|
elif line.startswith("+++ "):
|
|
patch.newname = line[4:].strip()
|
|
|
|
elif line.startswith("old mode") or line.startswith("deleted file mode"):
|
|
pass # ignore
|
|
|
|
elif line.startswith("new mode "):
|
|
patch.newmode = line[9:].strip()
|
|
|
|
elif line.startswith("new file mode "):
|
|
patch.newmode = line[14:].strip()
|
|
|
|
elif line.startswith("new mode") or line.startswith("new file mode"):
|
|
raise PatchParserError("Unable to parse header line '%s'." % line)
|
|
|
|
elif line.startswith("copy from") or line.startswith("copy to"):
|
|
raise NotImplementedError("Patch copy header not implemented yet.")
|
|
|
|
elif line.startswith("rename "):
|
|
raise NotImplementedError("Patch rename header not implemented yet.")
|
|
|
|
elif line.startswith("similarity index") or line.startswith("dissimilarity index"):
|
|
pass # ignore
|
|
|
|
elif line.startswith("index "):
|
|
r = re.match("^index ([a-fA-F0-9]*)\.\.([a-fA-F0-9]*)", line)
|
|
if not r: raise PatchParserError("Unable to parse index header line '%s'." % line)
|
|
patch.oldsha1, patch.newsha1 = r.group(1), r.group(2)
|
|
|
|
else:
|
|
break
|
|
fp.read()
|
|
|
|
if patch.oldname is None or patch.newname is None:
|
|
raise PatchParserError("Missing old or new name.")
|
|
elif patch.oldname == "/dev/null" and patch.newname == "/dev/null":
|
|
raise PatchParserError("Old and new name is /dev/null?")
|
|
|
|
if patch.oldname.startswith("a/"):
|
|
patch.oldname = patch.oldname[2:]
|
|
elif patch.oldname != "/dev/null":
|
|
raise PatchParserError("Old name in patch doesn't start with a/.")
|
|
|
|
if patch.newname.startswith("b/"):
|
|
patch.newname = patch.newname[2:]
|
|
elif patch.newname != "/dev/null":
|
|
raise PatchParserError("New name in patch doesn't start with b/.")
|
|
|
|
if patch.newname != "/dev/null":
|
|
patch.modified_file = patch.newname
|
|
else:
|
|
patch.modified_file = patch.oldname
|
|
|
|
# Decide between binary and textual patch
|
|
if line is None or line.startswith("diff --git ") or line.startswith("--- "):
|
|
if oldname != newname:
|
|
raise PatchParserError("Stripped old- and new name doesn't match.")
|
|
|
|
elif line.startswith("@@ -"):
|
|
while fp.read_hunk() is not None:
|
|
pass
|
|
|
|
elif line.rstrip() == "GIT binary patch":
|
|
if patch.oldsha1 is None or patch.newsha1 is None:
|
|
raise PatchParserError("Missing index header, sha1 sums required for binary patch.")
|
|
elif patch.oldname != patch.newname:
|
|
raise PatchParserError("Stripped old- and new name doesn't match for binary patch.")
|
|
fp.read()
|
|
|
|
line = fp.read()
|
|
if line is None: raise PatchParserError("Unexpected end of file.")
|
|
r = re.match("^(literal|delta) ([0-9]+)", line)
|
|
if not r: raise NotImplementedError("Only literal/delta patches are supported.")
|
|
patch.is_binary = True
|
|
|
|
# Skip over patch data
|
|
while True:
|
|
line = fp.read()
|
|
if line is None or line.strip() == "":
|
|
break
|
|
|
|
else:
|
|
raise PatchParserError("Unknown patch format.")
|
|
|
|
patch.offset_end = fp.tell()
|
|
return patch
|
|
|
|
def _parse_author(author):
|
|
if sys.version_info[0] > 2:
|
|
author = str(email.header.make_header(email.header.decode_header(author)))
|
|
else:
|
|
author = ' '.join([data.decode(format or 'utf-8').encode('utf-8') for \
|
|
data, format in email.header.decode_header(author)])
|
|
r = re.match("\"?([^\"]*)\"? <(.*)>", author)
|
|
if r is None: raise NotImplementedError("Failed to parse From - header.")
|
|
return r.group(1).strip(), r.group(2).strip()
|
|
|
|
def _parse_subject(subject):
|
|
version = "(v|try|rev|take) *([0-9]+)"
|
|
subject = subject.strip()
|
|
if subject.endswith("."): subject = subject[:-1]
|
|
r = re.match("^\\[PATCH([^]]*)\\](.*)$", subject, re.IGNORECASE)
|
|
if r is not None:
|
|
subject = r.group(2).strip()
|
|
r = re.search(version, r.group(1), re.IGNORECASE)
|
|
if r is not None: return subject, int(r.group(2))
|
|
r = re.match("^(.*)\\(%s\\)$" % version, subject, re.IGNORECASE)
|
|
if r is not None: return r.group(1).strip(), int(r.group(3))
|
|
r = re.match("^(.*)\\[%s\\]$" % version, subject, re.IGNORECASE)
|
|
if r is not None: return r.group(1).strip(), int(r.group(3))
|
|
r = re.match("^(.*)[.,] +%s$" % version, subject, re.IGNORECASE)
|
|
if r is not None: return r.group(1).strip(), int(r.group(3))
|
|
r = re.match("^([^:]+) %s: (.*)$" % version, subject, re.IGNORECASE)
|
|
if r is not None: return "%s: %s" % (r.group(1), r.group(4)), int(r.group(3))
|
|
r = re.match("^(.*) +%s$" % version, subject, re.IGNORECASE)
|
|
if r is not None: return r.group(1).strip(), int(r.group(3))
|
|
r = re.match("^(.*)\\(resend\\)$", subject, re.IGNORECASE)
|
|
if r is not None: return r.group(1).strip(), 1
|
|
return subject, 1
|
|
|
|
def read_patch(filename, fp=None):
|
|
"""Iterates over all patches contained in a file, and returns PatchObject objects."""
|
|
|
|
header = {}
|
|
with _PatchReader(filename, fp) as fp:
|
|
while True:
|
|
line = fp.peek()
|
|
if line is None:
|
|
break
|
|
|
|
elif line.startswith("From: "):
|
|
header['author'], header['email'] = _parse_author(line[6:])
|
|
header.pop('signedoffby', None)
|
|
fp.read()
|
|
|
|
elif line.startswith("Subject: "):
|
|
subject = line[9:].rstrip("\r\n")
|
|
fp.read()
|
|
while True:
|
|
line = fp.peek()
|
|
if not line.startswith(" "): break
|
|
subject += line.rstrip("\r\n")
|
|
fp.read()
|
|
subject, revision = _parse_subject(subject)
|
|
if not subject.endswith("."): subject += "."
|
|
subject = re.sub('^([^:]*: *)([a-z])', lambda x: "%s%s" %
|
|
(x.group(1), x.group(2).upper()), subject, 1)
|
|
header['subject'], header['revision'] = subject, revision
|
|
header.pop('signedoffby', None)
|
|
|
|
elif line.startswith("Signed-off-by: "):
|
|
if 'signedoffby' not in header:
|
|
header['signedoffby'] = []
|
|
header['signedoffby'].append(_parse_author(line[15:]))
|
|
fp.read()
|
|
|
|
elif line.startswith("diff --git "):
|
|
tmp = line.strip().split(" ")
|
|
if len(tmp) != 4: raise PatchParserError("Unable to parse git diff header line '%s'." % line)
|
|
yield _read_single_patch(fp, header, tmp[2].strip(), tmp[3].strip())
|
|
|
|
elif line.startswith("--- "):
|
|
yield _read_single_patch(fp, header)
|
|
|
|
elif line.startswith("@@ -") or line.startswith("+++ "):
|
|
raise PatchParserError("Patch didn't start with a git or diff header.")
|
|
|
|
else:
|
|
fp.read()
|
|
|
|
def apply_patch(original, patchfile, reverse=False, fuzz=2):
|
|
"""Apply a patch with optional fuzz - uses the commandline 'patch' utility."""
|
|
|
|
result = tempfile.NamedTemporaryFile(mode='w+', delete=False)
|
|
try:
|
|
# We open the file again to avoid race-conditions with multithreaded reads
|
|
with open(original.name) as fp:
|
|
shutil.copyfileobj(fp, result)
|
|
result.close()
|
|
|
|
cmdline = ["patch", "--no-backup-if-mismatch", "--force", "--silent", "-r", "-"]
|
|
if reverse: cmdline.append("--reverse")
|
|
if fuzz != 2: cmdline.append("--fuzz=%d" % fuzz)
|
|
cmdline += [result.name, patchfile.name]
|
|
|
|
exitcode = subprocess.call(cmdline, stdout=_devnull, stderr=_devnull)
|
|
if exitcode != 0:
|
|
raise PatchApplyError("Failed to apply patch (exitcode %d)." % exitcode)
|
|
|
|
# Hack - we can't keep the file open while patching ('patch' might rename/replace
|
|
# the file), so create a new _TemporaryFileWrapper object for the existing path.
|
|
return tempfile._TemporaryFileWrapper(file=open(result.name, 'r+'), \
|
|
name=result.name, delete=True)
|
|
except:
|
|
os.unlink(result.name)
|
|
raise
|
|
|
|
def _preprocess_source(fp):
|
|
"""Simple C preprocessor to determine where we can safely add #ifdef instructions."""
|
|
|
|
_re_state0 = re.compile("(\"|/[/*])")
|
|
_re_state1 = re.compile("(\\\\\"|\\\\\\\\|\")")
|
|
_re_state2 = re.compile("\\*/")
|
|
|
|
# We need to read the original file, and figure out where lines can be splitted
|
|
lines = []
|
|
for line in fp:
|
|
lines.append(line.rstrip("\n"))
|
|
|
|
split = set([0])
|
|
state = 0
|
|
|
|
i = 0
|
|
while i < len(lines):
|
|
|
|
# Read a full line (and handle line continuation)
|
|
line = lines[i]
|
|
i += 1
|
|
while line.endswith("\\"):
|
|
if i >= len(lines):
|
|
raise CParserError("Unexpected end of file.")
|
|
line = line[:-1] + lines[i]
|
|
i += 1
|
|
|
|
# To find out where we can add our #ifdef tags we use a simple
|
|
# statemachine. This allows finding the beginning of a multiline
|
|
# instruction or comment.
|
|
j = 0
|
|
while True:
|
|
|
|
# State 0: No context
|
|
if state == 0:
|
|
match = _re_state0.search(line, j)
|
|
if match is None: break
|
|
|
|
if match.group(0) == "\"":
|
|
state = 1 # Begin of string
|
|
elif match.group(0) == "/*":
|
|
state = 2 # Begin of comment
|
|
elif match.group(0) == "//":
|
|
break # Rest of the line is a comment, which can be safely ignored
|
|
else:
|
|
assert 0
|
|
|
|
# State 1: Inside of string
|
|
elif state == 1:
|
|
match = _re_state1.search(line, j)
|
|
if match is None:
|
|
raise CParserError("Line ended in the middle of a string.")
|
|
|
|
if match.group(0) == "\"":
|
|
state = 0 # End of string
|
|
elif match.group(0) != "\\\"" and match.group(0) != "\\\\":
|
|
assert 0
|
|
|
|
# State 2: Multiline comment
|
|
elif state == 2:
|
|
match = _re_state2.search(line, j)
|
|
if match is None: break
|
|
|
|
if match.group(0) == "*/":
|
|
state = 0 # End of comment
|
|
else:
|
|
assert 0
|
|
|
|
else:
|
|
raise CParserError("Internal state error.")
|
|
j = match.end()
|
|
|
|
# Only in state 0 (no context) we can split here
|
|
if state == 0:
|
|
split.add(i)
|
|
|
|
# Ensure that the last comment is properly terminated
|
|
if state != 0:
|
|
raise CParserError("Unexpected end of file.")
|
|
return lines, split
|
|
|
|
def generate_ifdef_patch(original, patched, ifdef):
|
|
"""Generate a patch which adds #ifdef where necessary to keep both the original and patched version."""
|
|
|
|
#
|
|
# The basic of idea of this algorithm is as following:
|
|
#
|
|
# (1) determine diff between original file and patched file
|
|
# (2) run the preprocessor, to determine where #ifdefs can be safely added
|
|
# (3) use diff and preprocessor information to create a merged version containing #ifdefs
|
|
# (4) create another diff to apply the changes on the patched version
|
|
#
|
|
|
|
with tempfile.NamedTemporaryFile(mode='w+') as diff:
|
|
exitcode = subprocess.call(["diff", "-u", original.name, patched.name],
|
|
stdout=diff, stderr=_devnull)
|
|
if exitcode == 0:
|
|
return None
|
|
elif exitcode != 1:
|
|
raise PatchDiffError("Failed to compute diff (exitcode %d)." % exitcode)
|
|
|
|
# Preprocess the original C source
|
|
original.seek(0)
|
|
lines, split = _preprocess_source(original)
|
|
|
|
# Parse the created diff file
|
|
fp = _PatchReader(diff.name, diff)
|
|
fp.seek(0)
|
|
|
|
# We expect this output format from 'diff', if this is not the case things might go wrong.
|
|
line = fp.read()
|
|
assert line.startswith("--- ")
|
|
line = fp.read()
|
|
assert line.startswith("+++ ")
|
|
|
|
hunks = []
|
|
while fp.peek() is not None:
|
|
srcpos, srcdata, dstpos, dstdata = fp.read_hunk()
|
|
|
|
# Ensure that the patch would really apply in practice
|
|
if lines[srcpos:srcpos + len(srcdata)] != srcdata:
|
|
raise PatchParserError("Patch failed to apply.")
|
|
|
|
# Strip common lines from the beginning and end
|
|
while len(srcdata) > 0 and len(dstdata) > 0 and \
|
|
srcdata[0] == dstdata[0]:
|
|
srcdata.pop(0)
|
|
dstdata.pop(0)
|
|
srcpos += 1
|
|
dstpos += 1
|
|
|
|
while len(srcdata) > 0 and len(dstdata) > 0 and \
|
|
srcdata[-1] == dstdata[-1]:
|
|
srcdata.pop()
|
|
dstdata.pop()
|
|
|
|
# Ensure that diff generated valid output
|
|
assert len(srcdata) > 0 or len(dstdata) > 0
|
|
|
|
# If this is the first hunk, then check if we have to extend it at the beginning
|
|
if len(hunks) == 0:
|
|
assert srcpos == dstpos
|
|
while srcpos > 0 and srcpos not in split:
|
|
srcpos -= 1
|
|
dstpos -= 1
|
|
srcdata.insert(0, lines[srcpos])
|
|
dstdata.insert(0, lines[srcpos])
|
|
hunks.append((srcpos, dstpos, srcdata, dstdata))
|
|
|
|
# Check if we can merge with the previous hunk
|
|
else:
|
|
prev_srcpos, prev_dstpos, prev_srcdata, prev_dstdata = hunks[-1]
|
|
prev_endpos = prev_srcpos + len(prev_srcdata)
|
|
|
|
found = 0
|
|
for i in xrange(prev_endpos, srcpos):
|
|
if i in split:
|
|
found += 1
|
|
|
|
# At least two possible splitting positions inbetween
|
|
if found >= 2:
|
|
while prev_endpos not in split:
|
|
prev_srcdata.append(lines[prev_endpos])
|
|
prev_dstdata.append(lines[prev_endpos])
|
|
prev_endpos += 1
|
|
|
|
while srcpos not in split:
|
|
srcpos -= 1
|
|
srcdata.insert(0, lines[srcpos])
|
|
dstdata.insert(0, lines[srcpos])
|
|
hunks.append((srcpos, dstpos, srcdata, dstdata))
|
|
|
|
# Merge hunks
|
|
else:
|
|
while prev_endpos < srcpos:
|
|
prev_srcdata.append(lines[prev_endpos])
|
|
prev_dstdata.append(lines[prev_endpos])
|
|
prev_endpos += 1
|
|
assert prev_dstpos + len(prev_dstdata) == dstpos
|
|
prev_srcdata.extend(srcdata)
|
|
prev_dstdata.extend(dstdata)
|
|
|
|
# Ready with this hunk
|
|
pass
|
|
|
|
# We might have to extend the last hunk
|
|
if len(hunks):
|
|
prev_srcpos, prev_dstpos, prev_srcdata, prev_dstdata = hunks[-1]
|
|
prev_endpos = prev_srcpos + len(prev_srcdata)
|
|
|
|
while prev_endpos < len(lines) and prev_endpos not in split:
|
|
prev_srcdata.append(lines[prev_endpos])
|
|
prev_dstdata.append(lines[prev_endpos])
|
|
prev_endpos += 1
|
|
|
|
# Generate resulting file with #ifdefs
|
|
with tempfile.NamedTemporaryFile(mode='w+') as intermediate:
|
|
|
|
pos = 0
|
|
while len(hunks):
|
|
srcpos, dstpos, srcdata, dstdata = hunks.pop(0)
|
|
if pos < srcpos:
|
|
intermediate.write("\n".join(lines[pos:srcpos]))
|
|
intermediate.write("\n")
|
|
|
|
if len(srcdata) and len(dstdata):
|
|
intermediate.write("#if defined(%s)\n" % ifdef)
|
|
intermediate.write("\n".join(dstdata))
|
|
intermediate.write("\n#else /* %s */\n" % ifdef)
|
|
intermediate.write("\n".join(srcdata))
|
|
intermediate.write("\n#endif /* %s */\n" % ifdef)
|
|
|
|
elif len(srcdata):
|
|
intermediate.write("#if !defined(%s)\n" % ifdef)
|
|
intermediate.write("\n".join(srcdata))
|
|
intermediate.write("\n#endif /* %s */\n" % ifdef)
|
|
|
|
elif len(dstdata):
|
|
intermediate.write("#if defined(%s)\n" % ifdef)
|
|
intermediate.write("\n".join(dstdata))
|
|
intermediate.write("\n#endif /* %s */\n" % ifdef)
|
|
|
|
else:
|
|
assert 0
|
|
pos = srcpos + len(srcdata)
|
|
|
|
if pos < len(lines):
|
|
intermediate.write("\n".join(lines[pos:]))
|
|
intermediate.write("\n")
|
|
intermediate.flush()
|
|
|
|
# Now we can finally compute the diff between the patched file and our intermediate file
|
|
diff = tempfile.NamedTemporaryFile(mode='w+')
|
|
exitcode = subprocess.call(["git", "diff", "--no-index", patched.name, intermediate.name],
|
|
stdout=diff, stderr=_devnull)
|
|
if exitcode != 1: # exitcode 0 cannot (=shouldn't) happen in this situation
|
|
raise PatchDiffError("Failed to compute diff (exitcode %d)." % exitcode)
|
|
|
|
diff.flush()
|
|
diff.seek(0)
|
|
|
|
# We expect this output format from 'git diff', if this is not the case things might go wrong.
|
|
line = diff.readline()
|
|
assert line.startswith("diff --git ")
|
|
line = diff.readline()
|
|
assert line.startswith("index ")
|
|
line = diff.readline()
|
|
assert line.startswith("--- ")
|
|
line = diff.readline()
|
|
assert line.startswith("+++ ")
|
|
|
|
# Return the final diff
|
|
return diff
|
|
|
|
if __name__ == "__main__":
|
|
import unittest
|
|
|
|
# Basic tests for _parse_author() and _parse_subject()
|
|
class PatchParserTests(unittest.TestCase):
|
|
def test_author(self):
|
|
author = _parse_author("Author Name <author@email.com>")
|
|
self.assertEqual(author, ("Author Name", "author@email.com"))
|
|
|
|
author = _parse_author("=?UTF-8?q?Author=20Name?= <author@email.com>")
|
|
self.assertEqual(author, ("Author Name", "author@email.com"))
|
|
|
|
def test_subject(self):
|
|
subject = _parse_subject("[PATCH v3] component: Subject.")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject (v3).")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject (try 3).")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject (take 3).")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject (rev 3).")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject [v3].")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject, v3.")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject v3.")
|
|
self.assertEqual(subject, ("component: Subject", 3))
|
|
|
|
subject = _parse_subject("[PATCH] component: Subject (resend).")
|
|
self.assertEqual(subject, ("component: Subject", 1))
|
|
|
|
# Basic tests for read_patch()
|
|
class PatchReaderTests(unittest.TestCase):
|
|
def test_simple(self):
|
|
with open("tests/simple.patch") as fp:
|
|
source = fp.read().split("\n")
|
|
|
|
# Test formatted git patch with author and subject
|
|
patchfile = tempfile.NamedTemporaryFile(mode='w+')
|
|
patchfile.write("\n".join(source))
|
|
patchfile.flush()
|
|
|
|
patches = list(read_patch(patchfile.name))
|
|
self.assertEqual(len(patches), 1)
|
|
self.assertEqual(patches[0].patch_author, "Author Name")
|
|
self.assertEqual(patches[0].patch_email, "author@email.com")
|
|
self.assertEqual(patches[0].patch_subject, "component: Replace arg1 with arg2.")
|
|
self.assertEqual(patches[0].patch_revision, 3)
|
|
self.assertEqual(patches[0].signed_off_by, [("Author Name", "author@email.com"),
|
|
("Other Developer", "other@email.com")])
|
|
self.assertEqual(patches[0].filename, patchfile.name)
|
|
self.assertEqual(patches[0].is_binary, False)
|
|
self.assertEqual(patches[0].modified_file, "test.txt")
|
|
|
|
lines = patches[0].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[10:23])
|
|
|
|
# Test with git diff
|
|
del source[0:10]
|
|
self.assertTrue(source[0].startswith("diff --git"))
|
|
patchfile = tempfile.NamedTemporaryFile(mode='w+')
|
|
patchfile.write("\n".join(source))
|
|
patchfile.flush()
|
|
|
|
patches = list(read_patch(patchfile.name))
|
|
self.assertEqual(len(patches), 1)
|
|
self.assertEqual(patches[0].patch_author, None)
|
|
self.assertEqual(patches[0].patch_email, None)
|
|
self.assertEqual(patches[0].patch_subject, None)
|
|
self.assertEqual(patches[0].patch_revision, 1)
|
|
self.assertEqual(patches[0].signed_off_by, [])
|
|
self.assertEqual(patches[0].filename, patchfile.name)
|
|
self.assertEqual(patches[0].is_binary, False)
|
|
self.assertEqual(patches[0].modified_file, "test.txt")
|
|
|
|
lines = patches[0].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[:13])
|
|
|
|
# Test with unified diff
|
|
del source[0:2]
|
|
self.assertTrue(source[0].startswith("---"))
|
|
patchfile = tempfile.NamedTemporaryFile(mode='w+')
|
|
patchfile.write("\n".join(source))
|
|
patchfile.flush()
|
|
|
|
patches = list(read_patch(patchfile.name))
|
|
self.assertEqual(len(patches), 1)
|
|
self.assertEqual(patches[0].patch_author, None)
|
|
self.assertEqual(patches[0].patch_email, None)
|
|
self.assertEqual(patches[0].patch_subject, None)
|
|
self.assertEqual(patches[0].patch_revision, 1)
|
|
self.assertEqual(patches[0].signed_off_by, [])
|
|
self.assertEqual(patches[0].filename, patchfile.name)
|
|
self.assertEqual(patches[0].is_binary, False)
|
|
self.assertEqual(patches[0].modified_file, "test.txt")
|
|
|
|
lines = patches[0].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[:11])
|
|
|
|
# Test with StringIO buffer
|
|
fp = StringIO("\n".join(source))
|
|
patches = list(read_patch("unknown.patch", fp))
|
|
self.assertEqual(len(patches), 1)
|
|
self.assertEqual(patches[0].patch_author, None)
|
|
self.assertEqual(patches[0].patch_email, None)
|
|
self.assertEqual(patches[0].patch_subject, None)
|
|
self.assertEqual(patches[0].patch_revision, 1)
|
|
self.assertEqual(patches[0].signed_off_by, [])
|
|
self.assertEqual(patches[0].filename, "unknown.patch")
|
|
self.assertEqual(patches[0].is_binary, False)
|
|
self.assertEqual(patches[0].modified_file, "test.txt")
|
|
|
|
def test_multi(self):
|
|
with open("tests/multi.patch") as fp:
|
|
source = fp.read().split("\n")
|
|
|
|
patchfile = tempfile.NamedTemporaryFile(mode='w+')
|
|
patchfile.write("\n".join(source))
|
|
patchfile.flush()
|
|
|
|
patches = list(read_patch(patchfile.name))
|
|
self.assertEqual(len(patches), 3)
|
|
|
|
self.assertEqual(patches[0].patch_author, "Author Name")
|
|
self.assertEqual(patches[0].patch_email, "author@email.com")
|
|
self.assertEqual(patches[0].patch_subject, "component: Replace arg1 with arg2.")
|
|
self.assertEqual(patches[0].patch_revision, 3)
|
|
self.assertEqual(patches[0].signed_off_by, [("Author Name", "author@email.com"),
|
|
("Other Developer", "other@email.com")])
|
|
self.assertEqual(patches[0].filename, patchfile.name)
|
|
self.assertEqual(patches[0].is_binary, False)
|
|
self.assertEqual(patches[0].modified_file, "other_test.txt")
|
|
|
|
lines = patches[0].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[11:24])
|
|
|
|
self.assertEqual(patches[1].patch_author, "Author Name")
|
|
self.assertEqual(patches[1].patch_email, "author@email.com")
|
|
self.assertEqual(patches[1].patch_subject, "component: Replace arg1 with arg2.")
|
|
self.assertEqual(patches[1].patch_revision, 3)
|
|
self.assertEqual(patches[1].signed_off_by, [("Author Name", "author@email.com"),
|
|
("Other Developer", "other@email.com")])
|
|
self.assertEqual(patches[1].filename, patchfile.name)
|
|
self.assertEqual(patches[1].is_binary, False)
|
|
self.assertEqual(patches[1].modified_file, "test.txt")
|
|
|
|
lines = patches[1].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[24:46])
|
|
|
|
self.assertEqual(patches[2].patch_author, "Other Developer")
|
|
self.assertEqual(patches[2].patch_email, "other@email.com")
|
|
self.assertEqual(patches[2].patch_subject, "component: Replace arg2 with arg3.")
|
|
self.assertEqual(patches[2].patch_revision, 4)
|
|
self.assertEqual(patches[2].signed_off_by, [("Other Developer", "other@email.com")])
|
|
self.assertEqual(patches[2].filename, patchfile.name)
|
|
self.assertEqual(patches[2].is_binary, False)
|
|
self.assertEqual(patches[2].modified_file, "test.txt")
|
|
|
|
lines = patches[2].read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, source[58:71])
|
|
|
|
# Basic tests for apply_patch()
|
|
class PatchApplyTests(unittest.TestCase):
|
|
def test_apply(self):
|
|
source = ["line1();", "line2();", "line3();",
|
|
"function(arg1);",
|
|
"line5();", "line6();", "line7();"]
|
|
original = tempfile.NamedTemporaryFile(mode='w+')
|
|
original.write("\n".join(source + [""]))
|
|
original.flush()
|
|
|
|
source = ["@@ -1,7 +1,7 @@",
|
|
" line1();", " line2();", " line3();",
|
|
"-function(arg1);",
|
|
"+function(arg2);",
|
|
" line5();", " line6();", " line7();"]
|
|
patchfile = tempfile.NamedTemporaryFile(mode='w+')
|
|
patchfile.write("\n".join(source + [""]))
|
|
patchfile.flush()
|
|
|
|
expected = ["line1();", "line2();", "line3();",
|
|
"function(arg2);",
|
|
"line5();", "line6();", "line7();"]
|
|
result = apply_patch(original, patchfile, fuzz=0)
|
|
lines = result.read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, expected)
|
|
|
|
expected = ["line1();", "line2();", "line3();",
|
|
"function(arg1);",
|
|
"line5();", "line6();", "line7();"]
|
|
result = apply_patch(result, patchfile, reverse=True, fuzz=0)
|
|
lines = result.read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, expected)
|
|
|
|
# Basic tests for _preprocess_source()
|
|
class PreprocessorTests(unittest.TestCase):
|
|
def test_preprocessor(self):
|
|
source = ["int a; // comment 1",
|
|
"int b; // comment 2 \\",
|
|
" comment 3 \\",
|
|
" comment 4",
|
|
"int c; // comment with \"quotes\"",
|
|
"int d; // comment with /* c++ comment */",
|
|
"int e; /* multi \\",
|
|
" line",
|
|
" comment */",
|
|
"char *x = \"\\\\\";",
|
|
"char *y = \"abc\\\"def\";",
|
|
"char *z = \"multi\" \\",
|
|
" \"line\"",
|
|
" \"string\";"]
|
|
lines, split = _preprocess_source(source)
|
|
self.assertEqual(lines, source)
|
|
self.assertEqual(split, set([0, 1, 4, 5, 6, 9, 10, 11, 13, 14]))
|
|
|
|
# Basic tests for generate_ifdef_patch()
|
|
class GenerateIfdefPatchTests(unittest.TestCase):
|
|
def test_ifdefined(self):
|
|
source = ["line1();", "line2();", "line3();",
|
|
"function(arg1, \\",
|
|
" arg2, \\",
|
|
" arg3);",
|
|
"line5();", "line6();", "line7();"]
|
|
source1 = tempfile.NamedTemporaryFile(mode='w+')
|
|
source1.write("\n".join(source + [""]))
|
|
source1.flush()
|
|
|
|
source = ["line1();", "line2();", "line3();",
|
|
"function(arg1, \\",
|
|
" new_arg2, \\",
|
|
" arg3);",
|
|
"line5();", "line6();", "line7();"]
|
|
source2 = tempfile.NamedTemporaryFile(mode='w+')
|
|
source2.write("\n".join(source + [""]))
|
|
source2.flush()
|
|
|
|
diff = generate_ifdef_patch(source1, source1, "PATCHED")
|
|
self.assertEqual(diff, None)
|
|
|
|
diff = generate_ifdef_patch(source2, source2, "PATCHED")
|
|
self.assertEqual(diff, None)
|
|
|
|
expected = ["@@ -1,9 +1,15 @@",
|
|
" line1();", " line2();", " line3();",
|
|
"+#if defined(PATCHED)",
|
|
" function(arg1, \\",
|
|
" new_arg2, \\",
|
|
" arg3);",
|
|
"+#else /* PATCHED */",
|
|
"+function(arg1, \\",
|
|
"+ arg2, \\",
|
|
"+ arg3);",
|
|
"+#endif /* PATCHED */",
|
|
" line5();", " line6();", " line7();"]
|
|
diff = generate_ifdef_patch(source1, source2, "PATCHED")
|
|
lines = diff.read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, expected)
|
|
|
|
expected = ["@@ -1,9 +1,15 @@",
|
|
" line1();", " line2();", " line3();",
|
|
"+#if defined(PATCHED)",
|
|
" function(arg1, \\",
|
|
" arg2, \\",
|
|
" arg3);",
|
|
"+#else /* PATCHED */",
|
|
"+function(arg1, \\",
|
|
"+ new_arg2, \\",
|
|
"+ arg3);",
|
|
"+#endif /* PATCHED */",
|
|
" line5();", " line6();", " line7();"]
|
|
diff = generate_ifdef_patch(source2, source1, "PATCHED")
|
|
lines = diff.read().rstrip("\n").split("\n")
|
|
self.assertEqual(lines, expected)
|
|
|
|
unittest.main()
|