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"""Cython.Distutils.build_ext
Implements a version of the Distutils 'build_ext' command, for
building Cython extension modules."""
# This module should be kept compatible with Python 2.3.
__revision__ = "$Id:$"
import sys, os, re
from types import *
from distutils.core import Command
from distutils.errors import *
from distutils.sysconfig import customize_compiler, get_python_version
from distutils.dep_util import newer, newer_group
from distutils import log
from distutils.dir_util import mkpath
from distutils.command import build_ext as _build_ext
extension_name_re = _build_ext.extension_name_re
show_compilers = _build_ext.show_compilers
class build_ext(_build_ext.build_ext):
description = "build C/C++ and Cython extensions (compile/link to build directory)"
sep_by = _build_ext.build_ext.sep_by
user_options = _build_ext.build_ext.user_options
boolean_options = _build_ext.build_ext.boolean_options
help_options = _build_ext.build_ext.help_options
# Add the pyrex specific data.
user_options.extend([
('pyrex-cplus', None,
"generate C++ source files"),
('pyrex-create-listing', None,
"write errors to a listing file"),
('pyrex-line-directives', None,
"emit source line directives"),
('pyrex-include-dirs=', None,
"path to the Cython include files" + sep_by),
('pyrex-c-in-temp', None,
"put generated C files in temp directory"),
('pyrex-gen-pxi', None,
"generate .pxi file for public declarations"),
('pyrex-directives=', None,
"compiler directive overrides"),
])
boolean_options.extend([
'pyrex-cplus', 'pyrex-create-listing', 'pyrex-line-directives', 'pyrex-c-in-temp'
])
def initialize_options(self):
_build_ext.build_ext.initialize_options(self)
self.pyrex_cplus = 0
self.pyrex_create_listing = 0
self.pyrex_line_directives = 0
self.pyrex_include_dirs = None
self.pyrex_directives = None
self.pyrex_c_in_temp = 0
self.pyrex_gen_pxi = 0
def finalize_options (self):
_build_ext.build_ext.finalize_options(self)
if self.pyrex_include_dirs is None:
self.pyrex_include_dirs = []
elif type(self.pyrex_include_dirs) is StringType:
self.pyrex_include_dirs = \
self.pyrex_include_dirs.split(os.pathsep)
if self.pyrex_directives is None:
self.pyrex_directives = {}
# finalize_options ()
def build_extensions(self):
# First, sanity-check the 'extensions' list
self.check_extensions_list(self.extensions)
for ext in self.extensions:
ext.sources = self.cython_sources(ext.sources, ext)
self.build_extension(ext)
def cython_sources(self, sources, extension):
"""
Walk the list of source files in 'sources', looking for Cython
source files (.pyx and .py). Run Cython on all that are
found, and return a modified 'sources' list with Cython source
files replaced by the generated C (or C++) files.
"""
try:
from Cython.Compiler.Main \
import CompilationOptions, \
default_options as pyrex_default_options, \
compile as cython_compile
from Cython.Compiler.Errors import PyrexError
except ImportError:
e = sys.exc_info()[1]
print("failed to import Cython: %s" % e)
raise DistutilsPlatformError("Cython does not appear to be installed")
new_sources = []
pyrex_sources = []
pyrex_targets = {}
# Setup create_list and cplus from the extension options if
# Cython.Distutils.extension.Extension is used, otherwise just
# use what was parsed from the command-line or the configuration file.
# cplus will also be set to true is extension.language is equal to
# 'C++' or 'c++'.
#try:
# create_listing = self.pyrex_create_listing or \
# extension.pyrex_create_listing
# cplus = self.pyrex_cplus or \
# extension.pyrex_cplus or \
# (extension.language != None and \
# extension.language.lower() == 'c++')
#except AttributeError:
# create_listing = self.pyrex_create_listing
# cplus = self.pyrex_cplus or \
# (extension.language != None and \
# extension.language.lower() == 'c++')
create_listing = self.pyrex_create_listing or \
getattr(extension, 'pyrex_create_listing', 0)
line_directives = self.pyrex_line_directives or \
getattr(extension, 'pyrex_line_directives', 0)
cplus = self.pyrex_cplus or getattr(extension, 'pyrex_cplus', 0) or \
(extension.language and extension.language.lower() == 'c++')
pyrex_gen_pxi = self.pyrex_gen_pxi or getattr(extension, 'pyrex_gen_pxi', 0)
# Set up the include_path for the Cython compiler:
# 1. Start with the command line option.
# 2. Add in any (unique) paths from the extension
# pyrex_include_dirs (if Cython.Distutils.extension is used).
# 3. Add in any (unique) paths from the extension include_dirs
includes = self.pyrex_include_dirs
try:
for i in extension.pyrex_include_dirs:
if not i in includes:
includes.append(i)
except AttributeError:
pass
for i in extension.include_dirs:
if not i in includes:
includes.append(i)
# Set up Cython compiler directives:
# 1. Start with the command line option.
# 2. Add in any (unique) entries from the extension
# pyrex_directives (if Cython.Distutils.extension is used).
directives = self.pyrex_directives
if hasattr(extension, "pyrex_directives"):
directives.update(extension.pyrex_directives)
# Set the target_ext to '.c'. Cython will change this to '.cpp' if
# needed.
if cplus:
target_ext = '.cpp'
else:
target_ext = '.c'
# Decide whether to drop the generated C files into the temp dir
# or the source tree.
if not self.inplace and (self.pyrex_c_in_temp
or getattr(extension, 'pyrex_c_in_temp', 0)):
target_dir = os.path.join(self.build_temp, "pyrex")
else:
target_dir = None
newest_dependency = None
for source in sources:
(base, ext) = os.path.splitext(os.path.basename(source))
if ext == ".py":
# FIXME: we might want to special case this some more
ext = '.pyx'
if ext == ".pyx": # Cython source file
output_dir = target_dir or os.path.dirname(source)
new_sources.append(os.path.join(output_dir, base + target_ext))
pyrex_sources.append(source)
pyrex_targets[source] = new_sources[-1]
elif ext == '.pxi' or ext == '.pxd':
if newest_dependency is None \
or newer(source, newest_dependency):
newest_dependency = source
else:
new_sources.append(source)
if not pyrex_sources:
return new_sources
module_name = extension.name
for source in pyrex_sources:
target = pyrex_targets[source]
depends = [source] + list(extension.depends or ())
rebuild = self.force or newer_group(depends, target, 'newer')
if not rebuild and newest_dependency is not None:
rebuild = newer(newest_dependency, target)
if rebuild:
log.info("cythoning %s to %s", source, target)
self.mkpath(os.path.dirname(target))
options = CompilationOptions(pyrex_default_options,
use_listing_file = create_listing,
include_path = includes,
compiler_directives = directives,
output_file = target,
cplus = cplus,
emit_linenums = line_directives,
generate_pxi = pyrex_gen_pxi)
result = cython_compile(source, options=options,
full_module_name=module_name)
else:
log.info("skipping '%s' Cython extension (up-to-date)", target)
return new_sources
# cython_sources ()
# class build_ext
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