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 from pip._vendor.packaging.utils import canonicalize_name 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, list_files=options.files, verbose=options.verbose): 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 = {} for p in pkg_resources.working_set: installed[canonicalize_name(p.project_name)] = p query_names = [canonicalize_name(name) 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('PKG-INFO'): metadata = dist.get_metadata('PKG-INFO') 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('INSTALLER'): for line in dist.get_metadata_lines('INSTALLER'): if line.strip(): package['installer'] = line.strip() break # @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) # It looks like FeedParser cannot deal with repeated headers classifiers = [] for line in metadata.splitlines(): if line.startswith('Classifier: '): classifiers.append(line[len('Classifier: '):]) package['classifiers'] = classifiers if file_list: package['files'] = sorted(file_list) yield package def print_results(distributions, list_files=False, verbose=False): """ Print the informations from installed distributions found. """ results_printed = False for i, dist in enumerate(distributions): results_printed = True if i > 0: logger.info("---") logger.info("Name: %s", dist.get('name', '')) logger.info("Version: %s", dist.get('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.get('location', '')) logger.info("Requires: %s", ', '.join(dist.get('requires', []))) if verbose: logger.info("Metadata-Version: %s", dist.get('metadata-version', '')) logger.info("Installer: %s", dist.get('installer', '')) logger.info("Classifiers:") for classifier in dist.get('classifiers', []): logger.info(" %s", classifier) logger.info("Entry-points:") for entry in dist.get('entry_points', []): logger.info(" %s", entry.strip()) if list_files: logger.info("Files:") for line in dist.get('files', []): logger.info(" %s", line.strip()) if "files" not in dist: logger.info("Cannot locate installed-files.txt") return results_printed