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import os
from distutils import log
import itertools
from setuptools.extern.six.moves import map
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 _get_target(self):
return self.target
@staticmethod
def init(root, pkg):
import sys, types
pep420 = sys.version_info > (3, 3)
pth = tuple(pkg.split('.'))
p = os.path.join(root, *pth)
ie = os.path.exists(os.path.join(p, '__init__.py'))
m = not ie and not pep420 and sys.modules.setdefault(pkg,
types.ModuleType(pkg))
mp = (m or []) and m.__dict__.setdefault('__path__', [])
(p not in mp) and mp.append(p)
parent, sep, child = pkg.rpartition('.')
m and parent and setattr(sys.modules[parent], child, m)
_nspkg_tmpl = (
"import setuptools.namespaces",
"setuptools.namespaces.Installer.init(%(root)r, %(pkg)r)",
)
"lines for the namespace installer"
def _get_root(self):
return "sys._getframe(1).f_locals['sitedir']"
def _gen_nspkg_line(self, pkg):
# ensure pkg is not a unicode string under Python 2.7
pkg = str(pkg)
root = self._get_root()
return ';'.join(self._nspkg_tmpl) % 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
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