| import os |
| from distutils import log |
| import itertools |
| |
| from setuptools.extern.six.moves import map |
| |
| |
| flatten = itertools.chain.from_iterable |
| |
| |
| class Installer: |
| |
| nspkg_ext = '-nspkg.pth' |
| |
| def install_namespaces(self): |
| nsp = self._get_all_ns_packages() |
| if not nsp: |
| return |
| filename, ext = os.path.splitext(self._get_target()) |
| filename += self.nspkg_ext |
| self.outputs.append(filename) |
| log.info("Installing %s", filename) |
| lines = map(self._gen_nspkg_line, nsp) |
| |
| if self.dry_run: |
| # always generate the lines, even in dry run |
| list(lines) |
| return |
| |
| with open(filename, 'wt') as f: |
| f.writelines(lines) |
| |
| def uninstall_namespaces(self): |
| filename, ext = os.path.splitext(self._get_target()) |
| filename += self.nspkg_ext |
| if not os.path.exists(filename): |
| return |
| log.info("Removing %s", filename) |
| os.remove(filename) |
| |
| def _get_target(self): |
| return self.target |
| |
| _nspkg_tmpl = ( |
| "import sys, types, os", |
| "has_mfs = sys.version_info > (3, 5)", |
| "p = os.path.join(%(root)s, *%(pth)r)", |
| "importlib = has_mfs and __import__('importlib.util')", |
| "has_mfs and __import__('importlib.machinery')", |
| ( |
| "m = has_mfs and " |
| "sys.modules.setdefault(%(pkg)r, " |
| "importlib.util.module_from_spec(" |
| "importlib.machinery.PathFinder.find_spec(%(pkg)r, " |
| "[os.path.dirname(p)])))" |
| ), |
| ( |
| "m = m or " |
| "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))" |
| ), |
| "mp = (m or []) and m.__dict__.setdefault('__path__',[])", |
| "(p not in mp) and mp.append(p)", |
| ) |
| "lines for the namespace installer" |
| |
| _nspkg_tmpl_multi = ( |
| 'm and setattr(sys.modules[%(parent)r], %(child)r, m)', |
| ) |
| "additional line(s) when a parent package is indicated" |
| |
| def _get_root(self): |
| return "sys._getframe(1).f_locals['sitedir']" |
| |
| def _gen_nspkg_line(self, pkg): |
| # ensure pkg is not a unicode string under Python 2.7 |
| pkg = str(pkg) |
| pth = tuple(pkg.split('.')) |
| root = self._get_root() |
| tmpl_lines = self._nspkg_tmpl |
| parent, sep, child = pkg.rpartition('.') |
| if parent: |
| tmpl_lines += self._nspkg_tmpl_multi |
| return ';'.join(tmpl_lines) % locals() + '\n' |
| |
| def _get_all_ns_packages(self): |
| """Return sorted list of all package namespaces""" |
| pkgs = self.distribution.namespace_packages or [] |
| return sorted(flatten(map(self._pkg_names, pkgs))) |
| |
| @staticmethod |
| def _pkg_names(pkg): |
| """ |
| Given a namespace package, yield the components of that |
| package. |
| |
| >>> names = Installer._pkg_names('a.b.c') |
| >>> set(names) == set(['a', 'a.b', 'a.b.c']) |
| True |
| """ |
| parts = pkg.split('.') |
| while parts: |
| yield '.'.join(parts) |
| parts.pop() |
| |
| |
| class DevelopInstaller(Installer): |
| def _get_root(self): |
| return repr(str(self.egg_path)) |
| |
| def _get_target(self): |
| return self.egg_link |