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import os import imp from itertools import product, starmap import distutils.command.install_lib as orig class install_lib(orig.install_lib): """Don't add compiled flags to filenames of non-Python files""" def run(self): self.build() outfiles = self.install() if outfiles is not None: # always compile, in case we have any extension stubs to deal with self.byte_compile(outfiles) def get_exclusions(self): """ Return a collections.Sized collections.Container of paths to be excluded for single_version_externally_managed installations. """ all_packages = ( pkg for ns_pkg in self._get_SVEM_NSPs() for pkg in self._all_packages(ns_pkg) ) excl_specs = product(all_packages, self._gen_exclusion_paths()) return set(starmap(self._exclude_pkg_path, excl_specs)) def _exclude_pkg_path(self, pkg, exclusion_path): """ Given a package name and exclusion path within that package, compute the full exclusion path. """ parts = pkg.split('.') + [exclusion_path] return os.path.join(self.install_dir, parts) @staticmethod def _all_packages(pkg_name): """ >>> list(install_lib._all_packages('foo.bar.baz')) ['foo.bar.baz', 'foo.bar', 'foo'] """ while pkg_name: yield pkg_name pkg_name, sep, child = pkg_name.rpartition('.') def _get_SVEM_NSPs(self): """ Get namespace packages (list) but only for single_version_externally_managed installations and empty otherwise. """ # TODO: is it necessary to short-circuit here? i.e. what's the cost # if get_finalized_command is called even when namespace_packages is # False? if not self.distribution.namespace_packages: return [] install_cmd = self.get_finalized_command('install') svem = install_cmd.single_version_externally_managed return self.distribution.namespace_packages if svem else [] @staticmethod def _gen_exclusion_paths(): """ Generate file paths to be excluded for namespace packages (bytecode cache files). """ # always exclude the package module itself yield '__init__.py' yield '__init__.pyc' yield '__init__.pyo' if not hasattr(imp, 'get_tag'): return base = os.path.join('__pycache__', '__init__.' + imp.get_tag()) yield base + '.pyc' yield base + '.pyo' yield base + '.opt-1.pyc' yield base + '.opt-2.pyc' def copy_tree( self, infile, outfile, preserve_mode=1, preserve_times=1, preserve_symlinks=0, level=1 ): assert preserve_mode and preserve_times and not preserve_symlinks exclude = self.get_exclusions() if not exclude: return orig.install_lib.copy_tree(self, infile, outfile) # Exclude namespace package __init__.py files from the output from setuptools.archive_util import unpack_directory from distutils import log outfiles = [] def pf(src, dst): if dst in exclude: log.warn("Skipping installation of %s (namespace package)", dst) return False log.info("copying %s -> %s", src, os.path.dirname(dst)) outfiles.append(dst) return dst unpack_directory(infile, outfile, pf) return outfiles def get_outputs(self): outputs = orig.install_lib.get_outputs(self) exclude = self.get_exclusions() if exclude: return [f for f in outputs if f not in exclude] return outputs