107 lines
3 KiB
Python
107 lines
3 KiB
Python
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:
|
|
# 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):
|
|
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
|