| import itertools |
| import os |
|
|
| from .compat import py312 |
|
|
| from distutils import log |
|
|
| flatten = itertools.chain.from_iterable |
|
|
|
|
| class Installer: |
| nspkg_ext = '-nspkg.pth' |
|
|
| def install_namespaces(self) -> None: |
| nsp = self._get_all_ns_packages() |
| if not nsp: |
| return |
| filename = self._get_nspkg_file() |
| self.outputs.append(filename) |
| log.info("Installing %s", filename) |
| lines = map(self._gen_nspkg_line, nsp) |
|
|
| with open(filename, 'wt', encoding=py312.PTH_ENCODING) as f: |
| |
| |
| f.writelines(lines) |
|
|
| def uninstall_namespaces(self) -> None: |
| filename = self._get_nspkg_file() |
| if not os.path.exists(filename): |
| return |
| log.info("Removing %s", filename) |
| os.remove(filename) |
|
|
| def _get_nspkg_file(self): |
| filename, _ = os.path.splitext(self._get_target()) |
| return filename + self.nspkg_ext |
|
|
| def _get_target(self): |
| return self.target |
|
|
| _nspkg_tmpl = ( |
| "import sys, types, os", |
| "p = os.path.join(%(root)s, *%(pth)r)", |
| "importlib = __import__('importlib.util')", |
| "__import__('importlib.machinery')", |
| ( |
| "m = " |
| "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(set(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 |
|
|
