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import os
from pip.basecommand import Command
from pip.log import logger
import pkg_resources
class ShowCommand(Command):
"""Show information about one or more installed packages."""
name = 'show'
usage = """
%prog [options] <package> ..."""
summary = 'Show information about installed packages.'
def __init__(self, *args, **kw):
super(ShowCommand, self).__init__(*args, **kw)
self.cmd_opts.add_option(
'-f', '--files',
dest='files',
action='store_true',
default=False,
help='Show the full list of installed files for each package.')
self.parser.insert_option_group(0, self.cmd_opts)
def run(self, options, args):
if not args:
logger.warn('ERROR: Please provide a package name or names.')
return
query = args
results = search_packages_info(query)
print_results(results, options.files)
def search_packages_info(query):
"""
Gather details from installed distributions. Print distribution name,
version, location, and installed files. Installed files requires a
pip generated 'installed-files.txt' in the distributions '.egg-info'
directory.
"""
installed_packages = dict(
[(p.project_name.lower(), p) for p in pkg_resources.working_set])
for name in query:
normalized_name = name.lower()
if normalized_name in installed_packages:
dist = installed_packages[normalized_name]
package = {
'name': dist.project_name,
'version': dist.version,
'location': dist.location,
'requires': [dep.project_name for dep in dist.requires()],
}
filelist = os.path.join(
dist.location,
dist.egg_name() + '.egg-info',
'installed-files.txt')
if os.path.isfile(filelist):
package['files'] = filelist
yield package
def print_results(distributions, list_all_files):
"""
Print the informations from installed distributions found.
"""
for dist in distributions:
logger.notify("---")
logger.notify("Name: %s" % dist['name'])
logger.notify("Version: %s" % dist['version'])
logger.notify("Location: %s" % dist['location'])
logger.notify("Requires: %s" % ', '.join(dist['requires']))
if list_all_files:
logger.notify("Files:")
if 'files' in dist:
for line in open(dist['files']):
logger.notify(" %s" % line.strip())
else:
logger.notify("Cannot locate installed-files.txt")