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Editing: _distutils_system_mod.py
""" Apply Debian-specific patches to distutils commands. Extracts the customized behavior from patches as reported in pypa/distutils#2 and applies those customizations (except for scheme definitions) to those commands. Place this module somewhere in sys.path to take effect. """ import os import sys import sysconfig import distutils.sysconfig import distutils.command.install as orig_install import distutils.command.install_egg_info as orig_install_egg_info from distutils.command.install_egg_info import ( to_filename, safe_name, safe_version, ) from distutils.errors import DistutilsOptionError class install(orig_install.install): user_options = list(orig_install.install.user_options) + [ ('install-layout=', None, "installation layout to choose (known values: deb, unix)"), ] def initialize_options(self): super().initialize_options() self.prefix_option = None self.install_layout = None def select_scheme(self, name): if name == "posix_prefix": if self.install_layout: if self.install_layout.lower() in ['deb']: name = "deb_system" elif self.install_layout.lower() in ['unix']: name = "posix_prefix" else: raise DistutilsOptionError( "unknown value for --install-layout") elif ((self.prefix_option and os.path.normpath(self.prefix) != '/usr/local') or is_virtual_environment()): name = "posix_prefix" else: if os.path.normpath(self.prefix) == '/usr/local': self.prefix = self.exec_prefix = '/usr' self.install_base = self.install_platbase = '/usr' name = "posix_local" super().select_scheme(name) def finalize_unix(self): self.prefix_option = self.prefix super().finalize_unix() class install_egg_info(orig_install_egg_info.install_egg_info): user_options = list(orig_install_egg_info.install_egg_info.user_options) + [ ('install-layout', None, "custom installation layout"), ] def initialize_options(self): super().initialize_options() self.prefix_option = None self.install_layout = None def finalize_options(self): self.set_undefined_options('install',('install_layout','install_layout')) self.set_undefined_options('install',('prefix_option','prefix_option')) super().finalize_options() @property def basename(self): if self.install_layout: if not self.install_layout.lower() in ['deb', 'unix']: raise DistutilsOptionError( "unknown value for --install-layout") no_pyver = (self.install_layout.lower() == 'deb') elif self.prefix_option: no_pyver = False else: no_pyver = True if no_pyver: basename = "%s-%s.egg-info" % ( to_filename(safe_name(self.distribution.get_name())), to_filename(safe_version(self.distribution.get_version())) ) else: basename = "%s-%s-py%d.%d.egg-info" % ( to_filename(safe_name(self.distribution.get_name())), to_filename(safe_version(self.distribution.get_version())), *sys.version_info[:2] ) return basename def is_virtual_environment(): return sys.base_prefix != sys.prefix or hasattr(sys, "real_prefix") def _posix_lib(standard_lib, libpython, early_prefix, prefix): is_default_prefix = not early_prefix or os.path.normpath(early_prefix) in ('/usr', '/usr/local') if standard_lib: return libpython elif is_default_prefix and not is_virtual_environment(): return os.path.join(prefix, "lib", "python3", "dist-packages") else: return os.path.join(libpython, "site-packages") def _inject_headers(name, scheme): """ Given a scheme name and the resolved scheme, if the scheme does not include headers, resolve the fallback scheme for the name and use headers from it. pypa/distutils#88 headers: module headers install location (posix_local is /local/ prefixed) include: cpython headers (Python.h) See also: bpo-44445 """ if 'headers' not in scheme: if name == 'posix_prefix': headers = scheme['include'] else: headers = orig_install.INSTALL_SCHEMES['posix_prefix']['headers'] if name == 'posix_local' and '/local/' not in headers: headers = headers.replace('/include/', '/local/include/') scheme['headers'] = headers return scheme def load_schemes_wrapper(_load_schemes): """ Implement the _inject_headers modification, above, but before _inject_headers() was introduced, upstream. So, slower and messier. """ def wrapped_load_schemes(): schemes = _load_schemes() for name, scheme in schemes.items(): _inject_headers(name, scheme) return schemes return wrapped_load_schemes def add_debian_schemes(schemes): """ Ensure that the custom schemes we refer to above are present in schemes. """ for name in ('posix_prefix', 'posix_local', 'deb_system'): if name not in schemes: scheme = sysconfig.get_paths(name, expand=False) schemes[name] = _inject_headers(name, scheme) def apply_customizations(): orig_install.install = install orig_install_egg_info.install_egg_info = install_egg_info distutils.sysconfig._posix_lib = _posix_lib if hasattr(orig_install, '_inject_headers'): # setuptools-bundled distutils >= 60.0.5 orig_install._inject_headers = _inject_headers elif hasattr(orig_install, '_load_schemes'): # setuptools-bundled distutils >= 59.2.0 orig_install._load_schemes = load_schemes_wrapper(orig_install._load_schemes) else: # older version with only statically defined schemes # this includes the version bundled with Python 3.10 that has our # schemes already included add_debian_schemes(orig_install.INSTALL_SCHEMES) apply_customizations()
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