| import os
|
| from distutils import log
|
| import itertools
|
|
|
|
|
| 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:
|
|
|
| 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):
|
| 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
|
|
|
