"""distutils.command.install_egg_info

Implements the Distutils 'install_egg_info' command, for installing
a package's PKG-INFO metadata."""


from distutils.cmd import Command
from distutils import log, dir_util
import os, sys, re

class install_egg_info(Command):
"""Install an .egg-info file for the package"""

description = "Install package's PKG-INFO metadata as an .egg-info file"
user_options = [
('install-dir=', 'd', "directory to install to"),
('install-layout', None, "custom installation layout"),
]

def initialize_options(self):
self.install_dir = None
self.install_layout = None
self.prefix_option = None

def finalize_options(self):
self.set_undefined_options('install_lib',('install_dir','install_dir'))
self.set_undefined_options('install',('install_layout','install_layout'))
self.set_undefined_options('install',('prefix_option','prefix_option'))
if self.install_layout:
basename = "%s-%s.egg-info" % (
to_filename(safe_name(self.distribution.get_name())),
to_filename(safe_version(self.distribution.get_version()))
)
if not self.install_layout.lower() in ['deb']:
raise DistutilsOptionError(
"unknown value for --install-layout")
elif self.prefix_option or 'real_prefix' in sys.__dict__:
basename = "%s-%s-py%s.egg-info" % (
to_filename(safe_name(self.distribution.get_name())),
to_filename(safe_version(self.distribution.get_version())),
sys.version[:3]
)
else:
basename = "%s-%s.egg-info" % (
to_filename(safe_name(self.distribution.get_name())),
to_filename(safe_version(self.distribution.get_version()))
)
self.target = os.path.join(self.install_dir, basename)
self.outputs = [self.target]

def run(self):
target = self.target
if os.path.isdir(target) and not os.path.islink(target):
dir_util.remove_tree(target, dry_run=self.dry_run)
elif os.path.exists(target):
self.execute(os.unlink,(self.target,),"Removing "+target)
elif not os.path.isdir(self.install_dir):
self.execute(os.makedirs, (self.install_dir,),
"Creating "+self.install_dir)
log.info("Writing %s", target)
if not self.dry_run:
f = open(target, 'w')
self.distribution.metadata.write_pkg_file(f)
f.close()

def get_outputs(self):
return self.outputs


# The following routines are taken from setuptools' pkg_resources module and
# can be replaced by importing them from pkg_resources once it is included
# in the stdlib.

def safe_name(name):
"""Convert an arbitrary string to a standard distribution name

Any runs of non-alphanumeric/. characters are replaced with a single '-'.
"""
return re.sub('[^A-Za-z0-9.]+', '-', name)


def safe_version(version):
"""Convert an arbitrary string to a standard version string

Spaces become dots, and all other non-alphanumeric characters become
dashes, with runs of multiple dashes condensed to a single dash.
"""
version = version.replace(' ','.')
return re.sub('[^A-Za-z0-9.]+', '-', version)


def to_filename(name):
"""Convert a project or version name to its filename-escaped form

Any '-' characters are currently replaced with '_'.
"""
return name.replace('-','_')