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#
# Cython patcher
# v1.8
#
# Copyright (C) 2012-2017 Michael Buesch <m@bues.ch>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import print_function
import sys
import os
import platform
import errno
import shutil
import hashlib
import re
parallelBuild = False
profileEnabled = False
ext_modules = []
CythonBuildExtension = None
_Cython_Distutils_build_ext = None
_cythonPossible = None
_cythonBuildUnits = []
def makedirs(path, mode=0o755):
try:
os.makedirs(path, mode)
except OSError as e:
if e.errno == errno.EEXIST:
return
raise e
def hashFile(path):
if sys.version_info[0] < 3:
ExpectedException = IOError
else:
ExpectedException = FileNotFoundError
try:
with open(path, "rb") as fd:
return hashlib.sha1(fd.read()).hexdigest()
except ExpectedException as e:
return None
def __fileopIfChanged(fromFile, toFile, fileop):
toFileHash = hashFile(toFile)
if toFileHash is not None:
fromFileHash = hashFile(fromFile)
if toFileHash == fromFileHash:
return False
makedirs(os.path.dirname(toFile))
fileop(fromFile, toFile)
return True
def copyIfChanged(fromFile, toFile):
return __fileopIfChanged(fromFile, toFile, shutil.copy2)
def moveIfChanged(fromFile, toFile):
return __fileopIfChanged(fromFile, toFile, os.rename)
def makeDummyFile(path):
if os.path.isfile(path):
return
print("creating dummy file '%s'" % path)
makedirs(os.path.dirname(path))
with open(path, "wb") as fd:
fd.write("\n".encode("UTF-8"))
def pyCythonPatchLine(line, basicOnly=False):
return line
def pyCythonPatch(fromFile, toFile, basicOnly=False):
print("cython-patch: patching file '%s' to '%s'" %\
(fromFile, toFile))
tmpFile = toFile + ".TMP"
makedirs(os.path.dirname(tmpFile))
with open(fromFile, "rb") as infd,\
open(tmpFile, "wb") as outfd:
for line in infd.read().decode("UTF-8").splitlines(True):
stripLine = line.strip()
if stripLine.endswith("#<no-cython-patch"):
outfd.write(line.encode("UTF-8"))
continue
# Replace import by cimport as requested by #+cimport
if "#+cimport" in stripLine:
line = line.replace("#+cimport", "#")
line = re.sub(r'\bimport\b', "cimport", line)
# Convert None to NULL
if "#@cy-NoneToNULL" in stripLine:
line = line.replace("#@cy-NoneToNULL", "#")
line = re.sub(r'\bNone\b', "NULL", line)
# Uncomment all lines containing #@cy
def uncomment(line, removeStr):
line = line.replace(removeStr, "")
if line.startswith("#"):
line = line[1:]
if not line.endswith("\n"):
line += "\n"
return line
if "#@cy" in stripLine and\
not "#@cy2" in stripLine and\
not "#@cy3" in stripLine:
line = uncomment(line, "#@cy")
if sys.version_info[0] < 3:
if "#@cy2" in stripLine:
line = uncomment(line, "#@cy2")
else:
if "#@cy3" in stripLine:
line = uncomment(line, "#@cy3")
# Sprinkle magic cdef/cpdef, as requested by #+cdef/#+cpdef
if "#+cdef-" in stripLine:
# +cdef-foo-bar is the extended cdef patching.
# It adds cdef and any additional characters to the
# start of the line. Dashes are replaced with spaces.
# Get the additional text
idx = line.find("#+cdef-")
cdefText = line[idx+2 : ]
cdefText = cdefText.replace("-", " ").rstrip("\r\n")
# Get the initial space length
spaceCnt = 0
while spaceCnt < len(line) and line[spaceCnt].isspace():
spaceCnt += 1
# Construct the new line
line = line[ : spaceCnt] + cdefText + " " + line[spaceCnt : ]
elif "#+cdef" in stripLine:
# Simple cdef patching:
# def -> cdef
# class -> cdef class
if stripLine.startswith("class"):
line = re.sub(r'\bclass\b', "cdef class", line)
else:
line = re.sub(r'\bdef\b', "cdef", line)
if "#+cpdef" in stripLine:
# Simple cpdef patching:
# def -> cpdef
line = re.sub(r'\bdef\b', "cpdef", line)
# Comment all lines containing #@nocy
# or #@cyX for the not matching version.
if "#@nocy" in stripLine:
line = "#" + line
if sys.version_info[0] < 3:
if "#@cy3" in stripLine:
line = "#" + line
else:
if "#@cy2" in stripLine:
line = "#" + line
if not basicOnly:
# Automagic types
line = re.sub(r'\b_Bool\b', "bint", line)
line = re.sub(r'\bExBool_t\b', "signed char", line)
line = re.sub(r'\bExBool_val\b', "-1", line)
line = re.sub(r'\bint8_t\b', "signed char", line)
line = re.sub(r'\buint8_t\b', "unsigned char", line)
line = re.sub(r'\bint16_t\b', "signed short", line)
line = re.sub(r'\buint16_t\b', "unsigned short", line)
line = re.sub(r'\bint32_t\b', "signed int", line)
line = re.sub(r'\buint32_t\b', "unsigned int", line)
line = re.sub(r'\bint64_t\b', "signed long long", line)
line = re.sub(r'\buint64_t\b', "unsigned long long", line)
# Remove compat stuff
line = line.replace("absolute_import,", "")
line = pyCythonPatchLine(line, basicOnly)
outfd.write(line.encode("UTF-8"))
outfd.flush()
if moveIfChanged(tmpFile, toFile):
print("(updated)")
else:
os.unlink(tmpFile)
class CythonBuildUnit(object):
def __init__(self, cyModName, baseName, fromPy, fromPxd, toDir, toPyx, toPxd):
self.cyModName = cyModName
self.baseName = baseName
self.fromPy = fromPy
self.fromPxd = fromPxd
self.toDir = toDir
self.toPyx = toPyx
self.toPxd = toPxd
def patchCythonModules(buildDir):
for unit in _cythonBuildUnits:
makedirs(unit.toDir)
makeDummyFile(os.path.join(unit.toDir, "__init__.py"))
if unit.baseName == "__init__":
# Copy and patch the package __init__.py
toPy = os.path.join(buildDir, *unit.cyModName.split(".")) + ".py"
pyCythonPatch(unit.fromPy, toPy,
basicOnly=True)
else:
# Generate the .pyx
pyCythonPatch(unit.fromPy, unit.toPyx)
# Copy and patch the .pxd, if any
if os.path.isfile(unit.fromPxd):
pyCythonPatch(unit.fromPxd, unit.toPxd)
def registerCythonModule(baseDir, sourceModName):
global ext_modules
global _cythonBuildUnits
modDir = os.path.join(baseDir, sourceModName)
# Make path to the cython patch-build-dir
patchDir = os.path.join(baseDir, "build",
"cython_patched.%s-%s-%d.%d" %\
(platform.system().lower(),
platform.machine().lower(),
sys.version_info[0], sys.version_info[1]),
"%s_cython" % sourceModName
)
if not os.path.exists(os.path.join(baseDir, "setup.py")) or\
not os.path.exists(modDir) or\
not os.path.isdir(modDir):
raise Exception("Wrong directory. "
"Execute setup.py from within the main directory.")
# Walk the module
for dirpath, dirnames, filenames in os.walk(modDir):
subpath = os.path.relpath(dirpath, modDir)
if subpath == baseDir:
subpath = ""
dirpathList = dirpath.split(os.path.sep)
if any(os.path.exists(os.path.sep.join(dirpathList[:i] + ["no_cython"]))
for i in range(len(dirpathList) + 1)):
# no_cython file exists. -> skip
continue
for filename in filenames:
if not filename.endswith(".py"):
continue
baseName = filename[:-3] # Strip .py
fromPy = os.path.join(dirpath, baseName + ".py")
fromPxd = os.path.join(dirpath, baseName + ".pxd.in")
toDir = os.path.join(patchDir, subpath)
toPyx = os.path.join(toDir, baseName + ".pyx")
toPxd = os.path.join(toDir, baseName + ".pxd")
# Construct the new cython module name
cyModName = [ "%s_cython" % sourceModName ]
if subpath:
cyModName.extend(subpath.split(os.sep))
cyModName.append(baseName)
cyModName = ".".join(cyModName)
# Remember the filenames for the build
unit = CythonBuildUnit(cyModName, baseName, fromPy, fromPxd,
toDir, toPyx, toPxd)
_cythonBuildUnits.append(unit)
if baseName != "__init__":
# Create a distutils Extension for the module
ext_modules.append(
_Cython_Distutils_Extension(
cyModName,
[toPyx],
cython_directives={
"profile" : profileEnabled,
}
)
)
def registerCythonModules():
baseDir = os.curdir # Base directory, where setup.py lives.
for filename in os.listdir(baseDir):
if os.path.isdir(os.path.join(baseDir, filename)) and\
os.path.exists(os.path.join(baseDir, filename, "__init__.py")) and\
not os.path.exists(os.path.join(baseDir, filename, "no_cython")):
registerCythonModule(baseDir, filename)
def cythonBuildPossible():
global _cythonPossible
if _cythonPossible is not None:
return _cythonPossible
_cythonPossible = False
if os.name != "posix":
print("WARNING: Not building CYTHON modules on '%s' platform." %\
os.name)
return False
if "bdist_wininst" in sys.argv:
print("WARNING: Omitting CYTHON modules while building "
"Windows installer.")
return False
try:
from Cython.Distutils import build_ext, Extension
global _Cython_Distutils_build_ext
global _Cython_Distutils_Extension
_Cython_Distutils_build_ext = build_ext
_Cython_Distutils_Extension = Extension
except ImportError as e:
print("WARNING: Could not build the CYTHON modules: "
"%s" % str(e))
print("--> Is Cython installed?")
return False
_cythonPossible = True
return True
if sys.version_info[0] < 3:
# Cython2 build libraries need method pickling
# for parallel build.
def unpickle_method(fname, obj, cls):
# Ignore MRO. We don't seem to inherit methods.
return cls.__dict__[fname].__get__(obj, cls)
def pickle_method(m):
return unpickle_method, (m.im_func.__name__,
m.im_self,
m.im_class)
import copy_reg, types
copy_reg.pickle(types.MethodType, pickle_method, unpickle_method)
def cyBuildWrapper(arg):
# This function does the same thing as the for-loop-body
# inside of Cython's build_ext.build_extensions() method.
# It is called via multiprocessing to build extensions
# in parallel.
# Note that this might break, if Cython's build_extensions()
# is changed and stuff is added to its for loop. Meh.
self, ext = arg
ext.sources = self.cython_sources(ext.sources, ext)
self.build_extension(ext)
if cythonBuildPossible():
# Override Cython's build_ext class.
class CythonBuildExtension(_Cython_Distutils_build_ext):
def build_extension(self, ext):
assert(not ext.name.endswith("__init__"))
_Cython_Distutils_build_ext.build_extension(self, ext)
def build_extensions(self):
global parallelBuild
# First patch the files, the run the build
patchCythonModules(self.build_lib)
if parallelBuild:
# Run the parallel build, yay.
try:
self.check_extensions_list(self.extensions)
from multiprocessing.pool import Pool
Pool().map(cyBuildWrapper,
((self, ext) for ext in self.extensions))
except OSError as e:
# This might happen in a restricted
# environment like chroot.
print("WARNING: Parallel build "
"disabled due to: %s" % str(e))
parallelBuild = False
if not parallelBuild:
# Run the normal non-parallel build.
_Cython_Distutils_build_ext.build_extensions(self)
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