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/lib
/python3.11
/site-packages
/setuptools
/_distutils
/extension.py
"""distutils.extension | |
Provides the Extension class, used to describe C/C++ extension | |
modules in setup scripts.""" | |
import os | |
import warnings | |
# This class is really only used by the "build_ext" command, so it might | |
# make sense to put it in distutils.command.build_ext. However, that | |
# module is already big enough, and I want to make this class a bit more | |
# complex to simplify some common cases ("foo" module in "foo.c") and do | |
# better error-checking ("foo.c" actually exists). | |
# | |
# Also, putting this in build_ext.py means every setup script would have to | |
# import that large-ish module (indirectly, through distutils.core) in | |
# order to do anything. | |
class Extension: | |
"""Just a collection of attributes that describes an extension | |
module and everything needed to build it (hopefully in a portable | |
way, but there are hooks that let you be as unportable as you need). | |
Instance attributes: | |
name : string | |
the full name of the extension, including any packages -- ie. | |
*not* a filename or pathname, but Python dotted name | |
sources : [string] | |
list of source filenames, relative to the distribution root | |
(where the setup script lives), in Unix form (slash-separated) | |
for portability. Source files may be C, C++, SWIG (.i), | |
platform-specific resource files, or whatever else is recognized | |
by the "build_ext" command as source for a Python extension. | |
include_dirs : [string] | |
list of directories to search for C/C++ header files (in Unix | |
form for portability) | |
define_macros : [(name : string, value : string|None)] | |
list of macros to define; each macro is defined using a 2-tuple, | |
where 'value' is either the string to define it to or None to | |
define it without a particular value (equivalent of "#define | |
FOO" in source or -DFOO on Unix C compiler command line) | |
undef_macros : [string] | |
list of macros to undefine explicitly | |
library_dirs : [string] | |
list of directories to search for C/C++ libraries at link time | |
libraries : [string] | |
list of library names (not filenames or paths) to link against | |
runtime_library_dirs : [string] | |
list of directories to search for C/C++ libraries at run time | |
(for shared extensions, this is when the extension is loaded) | |
extra_objects : [string] | |
list of extra files to link with (eg. object files not implied | |
by 'sources', static library that must be explicitly specified, | |
binary resource files, etc.) | |
extra_compile_args : [string] | |
any extra platform- and compiler-specific information to use | |
when compiling the source files in 'sources'. For platforms and | |
compilers where "command line" makes sense, this is typically a | |
list of command-line arguments, but for other platforms it could | |
be anything. | |
extra_link_args : [string] | |
any extra platform- and compiler-specific information to use | |
when linking object files together to create the extension (or | |
to create a new static Python interpreter). Similar | |
interpretation as for 'extra_compile_args'. | |
export_symbols : [string] | |
list of symbols to be exported from a shared extension. Not | |
used on all platforms, and not generally necessary for Python | |
extensions, which typically export exactly one symbol: "init" + | |
extension_name. | |
swig_opts : [string] | |
any extra options to pass to SWIG if a source file has the .i | |
extension. | |
depends : [string] | |
list of files that the extension depends on | |
language : string | |
extension language (i.e. "c", "c++", "objc"). Will be detected | |
from the source extensions if not provided. | |
optional : boolean | |
specifies that a build failure in the extension should not abort the | |
build process, but simply not install the failing extension. | |
""" | |
# When adding arguments to this constructor, be sure to update | |
# setup_keywords in core.py. | |
def __init__( | |
self, | |
name, | |
sources, | |
include_dirs=None, | |
define_macros=None, | |
undef_macros=None, | |
library_dirs=None, | |
libraries=None, | |
runtime_library_dirs=None, | |
extra_objects=None, | |
extra_compile_args=None, | |
extra_link_args=None, | |
export_symbols=None, | |
swig_opts=None, | |
depends=None, | |
language=None, | |
optional=None, | |
**kw # To catch unknown keywords | |
): | |
if not isinstance(name, str): | |
raise AssertionError("'name' must be a string") | |
if not (isinstance(sources, list) and all(isinstance(v, str) for v in sources)): | |
raise AssertionError("'sources' must be a list of strings") | |
self.name = name | |
self.sources = sources | |
self.include_dirs = include_dirs or [] | |
self.define_macros = define_macros or [] | |
self.undef_macros = undef_macros or [] | |
self.library_dirs = library_dirs or [] | |
self.libraries = libraries or [] | |
self.runtime_library_dirs = runtime_library_dirs or [] | |
self.extra_objects = extra_objects or [] | |
self.extra_compile_args = extra_compile_args or [] | |
self.extra_link_args = extra_link_args or [] | |
self.export_symbols = export_symbols or [] | |
self.swig_opts = swig_opts or [] | |
self.depends = depends or [] | |
self.language = language | |
self.optional = optional | |
# If there are unknown keyword options, warn about them | |
if len(kw) > 0: | |
options = [repr(option) for option in kw] | |
options = ', '.join(sorted(options)) | |
msg = "Unknown Extension options: %s" % options | |
warnings.warn(msg) | |
def __repr__(self): | |
return '<{}.{}({!r}) at {:#x}>'.format( | |
self.__class__.__module__, | |
self.__class__.__qualname__, | |
self.name, | |
id(self), | |
) | |
def read_setup_file(filename): # noqa: C901 | |
"""Reads a Setup file and returns Extension instances.""" | |
from distutils.sysconfig import parse_makefile, expand_makefile_vars, _variable_rx | |
from distutils.text_file import TextFile | |
from distutils.util import split_quoted | |
# First pass over the file to gather "VAR = VALUE" assignments. | |
vars = parse_makefile(filename) | |
# Second pass to gobble up the real content: lines of the form | |
# <module> ... [<sourcefile> ...] [<cpparg> ...] [<library> ...] | |
file = TextFile( | |
filename, | |
strip_comments=1, | |
skip_blanks=1, | |
join_lines=1, | |
lstrip_ws=1, | |
rstrip_ws=1, | |
) | |
try: | |
extensions = [] | |
while True: | |
line = file.readline() | |
if line is None: # eof | |
break | |
if _variable_rx.match(line): # VAR=VALUE, handled in first pass | |
continue | |
if line[0] == line[-1] == "*": | |
file.warn("'%s' lines not handled yet" % line) | |
continue | |
line = expand_makefile_vars(line, vars) | |
words = split_quoted(line) | |
# NB. this parses a slightly different syntax than the old | |
# makesetup script: here, there must be exactly one extension per | |
# line, and it must be the first word of the line. I have no idea | |
# why the old syntax supported multiple extensions per line, as | |
# they all wind up being the same. | |
module = words[0] | |
ext = Extension(module, []) | |
append_next_word = None | |
for word in words[1:]: | |
if append_next_word is not None: | |
append_next_word.append(word) | |
append_next_word = None | |
continue | |
suffix = os.path.splitext(word)[1] | |
switch = word[0:2] | |
value = word[2:] | |
if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"): | |
# hmm, should we do something about C vs. C++ sources? | |
# or leave it up to the CCompiler implementation to | |
# worry about? | |
ext.sources.append(word) | |
elif switch == "-I": | |
ext.include_dirs.append(value) | |
elif switch == "-D": | |
equals = value.find("=") | |
if equals == -1: # bare "-DFOO" -- no value | |
ext.define_macros.append((value, None)) | |
else: # "-DFOO=blah" | |
ext.define_macros.append((value[0:equals], value[equals + 2 :])) | |
elif switch == "-U": | |
ext.undef_macros.append(value) | |
elif switch == "-C": # only here 'cause makesetup has it! | |
ext.extra_compile_args.append(word) | |
elif switch == "-l": | |
ext.libraries.append(value) | |
elif switch == "-L": | |
ext.library_dirs.append(value) | |
elif switch == "-R": | |
ext.runtime_library_dirs.append(value) | |
elif word == "-rpath": | |
append_next_word = ext.runtime_library_dirs | |
elif word == "-Xlinker": | |
append_next_word = ext.extra_link_args | |
elif word == "-Xcompiler": | |
append_next_word = ext.extra_compile_args | |
elif switch == "-u": | |
ext.extra_link_args.append(word) | |
if not value: | |
append_next_word = ext.extra_link_args | |
elif suffix in (".a", ".so", ".sl", ".o", ".dylib"): | |
# NB. a really faithful emulation of makesetup would | |
# append a .o file to extra_objects only if it | |
# had a slash in it; otherwise, it would s/.o/.c/ | |
# and append it to sources. Hmmmm. | |
ext.extra_objects.append(word) | |
else: | |
file.warn("unrecognized argument '%s'" % word) | |
extensions.append(ext) | |
finally: | |
file.close() | |
return extensions | |