'pip freeze PKG' outputs the installed version of PKG and its dependencies

pip/commands/freeze.py

@@ -6,7 +6,8 @@
 from pip.req import InstallRequirement
 from pip.log import logger
 from pip.basecommand import Command
-from pip.util import get_installed_distributions
+from pip.util import get_installed_distributions, recursive_dependencies
+
 
 # packages to exclude from freeze output
 freeze_excludes = stdlib_pkgs + ['setuptools', 'pip', 'distribute']
@@ -20,7 +21,7 @@ class FreezeCommand(Command):
  """
  name = 'freeze'
  usage = """
- %prog [options]"""
+ %prog [options] [PACKAGE PACKAGE...]"""
  summary = 'Output installed packages in requirements format.'
 
  def __init__(self, *args, **kw):
@@ -72,10 +73,19 @@ def run(self, options, args):
  for link in find_links:
  f.write('-f %s\n' % link)
  installations = {}
+
+ only_dists = []
+ if args:
+ only_dists = args
+ only_dists.extend(recursive_dependencies(only_dists))
+ only_dists = [name.lower() for name in only_dists]
+
  for dist in get_installed_distributions(local_only=local_only,
  skip=freeze_excludes):
- req = pip.FrozenRequirement.from_dist(dist, find_tags=find_tags)
- installations[req.name] = req
+ if not only_dists or dist.project_name.lower() in only_dists:
+ req = pip.FrozenRequirement.from_dist(
+ dist, find_tags=find_tags)
+ installations[req.name] = req
  if requirement:
  req_f = open(requirement)
  for line in req_f:

pip/commands/show.py

@@ -2,6 +2,7 @@
 
 from pip.basecommand import Command
 from pip.log import logger
+from pip.util import recursive_dependencies
 from pip._vendor import pkg_resources
 
 
@@ -78,6 +79,8 @@ def print_results(distributions, list_all_files):
  logger.notify("Version: %s" % dist['version'])
  logger.notify("Location: %s" % dist['location'])
  logger.notify("Requires: %s" % ', '.join(dist['requires']))
+ logger.notify("Requires recursive: %s" % ', '.join(
+ recursive_dependencies([dist['name']])))
  if list_all_files:
  logger.notify("Files:")
  if dist['files'] is not None:

pip/util.py

@@ -400,6 +400,23 @@ def get_installed_distributions(local_only=True,
  ]
 
 
+def recursive_dependencies(query):
+ """Return list of dependencies of dists in ``query``, recursively."""
+ dependencies = set()
+ installed = dict(
+ [(p.project_name.lower(), p) for p in pkg_resources.working_set])
+ query_names = [name.lower() for name in query]
+ for pkg in query_names:
+ try:
+ dist = installed[pkg]
+ for dep in dist.requires():
+ dependencies.add(dep.project_name)
+ dependencies.update(recursive_dependencies([dep.project_name]))
+ except KeyError:
+ pass # pkg is not installed.
+ return dependencies
+
+
 def egg_link_path(dist):
  """
  Return the path for the .egg-link file if it exists, otherwise, None.

tests/functional/test_show.py

@@ -15,6 +15,7 @@ def test_show(script):
  assert lines[2] == 'Version: %s' % __version__, lines[2]
  assert lines[3].startswith('Location: '), lines[3]
  assert lines[4] == 'Requires: '
+ assert lines[5] == 'Requires recursive: '
 
 
 def test_show_with_files_not_found(script, data):
@@ -32,6 +33,7 @@ def test_show_with_files_not_found(script, data):
  assert lines[2] == 'Version: 0.0.0', lines[2]
  assert lines[3].startswith('Location: '), lines[3]
  assert lines[4] == 'Requires: ', lines[4]
+ assert lines[4] == 'Requires recursive: ', lines[5]
  assert lines[5] == 'Files:', lines[5]
  assert lines[6] == 'Cannot locate installed-files.txt', lines[6]