djavu-asus/emacs/elpy/rpc-venv/lib/python3.11/site-packages/setuptools/namespaces.py

   1 import os
   2 from distutils import log
   3 import itertools
   4
   5
   6 flatten = itertools.chain.from_iterable
   7
   8
   9 class Installer:
  10
  11     nspkg_ext = '-nspkg.pth'
  12
  13     def install_namespaces(self):
  14         nsp = self._get_all_ns_packages()
  15         if not nsp:
  16             return
  17         filename, ext = os.path.splitext(self._get_target())
  18         filename += self.nspkg_ext
  19         self.outputs.append(filename)
  20         log.info("Installing %s", filename)
  21         lines = map(self._gen_nspkg_line, nsp)
  22
  23         if self.dry_run:
  24             # always generate the lines, even in dry run
  25             list(lines)
  26             return
  27
  28         with open(filename, 'wt') as f:
  29             f.writelines(lines)
  30
  31     def uninstall_namespaces(self):
  32         filename, ext = os.path.splitext(self._get_target())
  33         filename += self.nspkg_ext
  34         if not os.path.exists(filename):
  35             return
  36         log.info("Removing %s", filename)
  37         os.remove(filename)
  38
  39     def _get_target(self):
  40         return self.target
  41
  42     _nspkg_tmpl = (
  43         "import sys, types, os",
  44         "has_mfs = sys.version_info > (3, 5)",
  45         "p = os.path.join(%(root)s, *%(pth)r)",
  46         "importlib = has_mfs and __import__('importlib.util')",
  47         "has_mfs and __import__('importlib.machinery')",
  48         (
  49             "m = has_mfs and "
  50             "sys.modules.setdefault(%(pkg)r, "
  51             "importlib.util.module_from_spec("
  52             "importlib.machinery.PathFinder.find_spec(%(pkg)r, "
  53             "[os.path.dirname(p)])))"
  54         ),
  55         (
  56             "m = m or "
  57             "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))"
  58         ),
  59         "mp = (m or []) and m.__dict__.setdefault('__path__',[])",
  60         "(p not in mp) and mp.append(p)",
  61     )
  62     "lines for the namespace installer"
  63
  64     _nspkg_tmpl_multi = (
  65         'm and setattr(sys.modules[%(parent)r], %(child)r, m)',
  66     )
  67     "additional line(s) when a parent package is indicated"
  68
  69     def _get_root(self):
  70         return "sys._getframe(1).f_locals['sitedir']"
  71
  72     def _gen_nspkg_line(self, pkg):
  73         pth = tuple(pkg.split('.'))
  74         root = self._get_root()
  75         tmpl_lines = self._nspkg_tmpl
  76         parent, sep, child = pkg.rpartition('.')
  77         if parent:
  78             tmpl_lines += self._nspkg_tmpl_multi
  79         return ';'.join(tmpl_lines) % locals() + '\n'
  80
  81     def _get_all_ns_packages(self):
  82         """Return sorted list of all package namespaces"""
  83         pkgs = self.distribution.namespace_packages or []
  84         return sorted(flatten(map(self._pkg_names, pkgs)))
  85
  86     @staticmethod
  87     def _pkg_names(pkg):
  88         """
  89         Given a namespace package, yield the components of that
  90         package.
  91
  92         >>> names = Installer._pkg_names('a.b.c')
  93         >>> set(names) == set(['a', 'a.b', 'a.b.c'])
  94         True
  95         """
  96         parts = pkg.split('.')
  97         while parts:
  98             yield '.'.join(parts)
  99             parts.pop()
 100
 101
 102 class DevelopInstaller(Installer):
 103     def _get_root(self):
 104         return repr(str(self.egg_path))
 105
 106     def _get_target(self):
 107         return self.egg_link