import os from pip.basecommand import Command from pip.log import logger from pip._vendor import pkg_resources class ShowCommand(Command): """Show information about one or more installed packages.""" name = 'show' usage = """ %prog [options] ...""" 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")