| | 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) |
| |
|
| | if self.dry_run: |
| | |
| | list(lines) |
| | return |
| |
|
| | 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 |
| |
|
