from __future__ import absolute_import from email.parser import FeedParser import logging import os from pip.basecommand import Command from pip.status_codes import SUCCESS, ERROR from pip._vendor import pkg_resources logger = logging.getLogger(__name__) 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.warning('ERROR: Please provide a package name or names.') return ERROR query = args results = search_packages_info(query) if not print_results(results, options.files): return ERROR return SUCCESS 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 = dict( [(p.project_name.lower(), p) for p in pkg_resources.working_set]) query_names = [name.lower() for name in query] for dist in [installed[pkg] for pkg in query_names if pkg in installed]: package = { 'name': dist.project_name, 'version': dist.version, 'location': dist.location, 'requires': [dep.project_name for dep in dist.requires()], } file_list = None metadata = None if isinstance(dist, pkg_resources.DistInfoDistribution): # RECORDs should be part of .dist-info metadatas if dist.has_metadata('RECORD'): lines = dist.get_metadata_lines('RECORD') paths = [l.split(',')[0] for l in lines] paths = [os.path.join(dist.location, p) for p in paths] file_list = [os.path.relpath(p, dist.location) for p in paths] if dist.has_metadata('METADATA'): metadata = dist.get_metadata('METADATA') else: # Otherwise use pip's log for .egg-info's if dist.has_metadata('installed-files.txt'): paths = dist.get_metadata_lines('installed-files.txt') paths = [os.path.join(dist.egg_info, p) for p in paths] file_list = [os.path.relpath(p, dist.location) for p in paths] if dist.has_metadata('entry_points.txt'): entry_points = dist.get_metadata_lines('entry_points.txt') package['entry_points'] = entry_points if dist.has_metadata('PKG-INFO'): metadata = dist.get_metadata('PKG-INFO') # @todo: Should pkg_resources.Distribution have a # `get_pkg_info` method? feed_parser = FeedParser() feed_parser.feed(metadata) pkg_info_dict = feed_parser.close() for key in ('metadata-version', 'summary', 'home-page', 'author', 'author-email', 'license'): package[key] = pkg_info_dict.get(key) # use and short-circuit to check for None package['files'] = file_list and sorted(file_list) yield package def print_results(distributions, list_all_files): """ Print the informations from installed distributions found. """ results_printed = False for dist in distributions: results_printed = True logger.info("---") logger.info("Metadata-Version: %s" % dist.get('metadata-version')) logger.info("Name: %s" % dist['name']) logger.info("Version: %s" % dist['version']) logger.info("Summary: %s" % dist.get('summary')) logger.info("Home-page: %s" % dist.get('home-page')) logger.info("Author: %s" % dist.get('author')) logger.info("Author-email: %s" % dist.get('author-email')) logger.info("License: %s" % dist.get('license')) logger.info("Location: %s" % dist['location']) logger.info("Requires: %s" % ', '.join(dist['requires'])) if list_all_files: logger.info("Files:") if dist['files'] is not None: for line in dist['files']: logger.info(" %s" % line.strip()) else: logger.info("Cannot locate installed-files.txt") if 'entry_points' in dist: logger.info("Entry-points:") for line in dist['entry_points']: logger.info(" %s" % line.strip()) return results_printed