'pip show {NAME}' also shows the list of recursive dependencies of package '{NAME}'.

Author: benoitbryon

pip/commands/freeze.py

@@ -6,31 +6,13 @@
 from pip.req import InstallRequirement
 from pip.log import logger
 from pip.basecommand import Command
-from pip.util import get_installed_distributions
-from pip._vendor import pkg_resources
+from pip.util import get_installed_distributions, recursive_dependencies
 
 
 # packages to exclude from freeze output
 freeze_excludes = stdlib_pkgs + ['setuptools', 'pip', 'distribute']
 
 
-def recursive_dependencies(query):
-    """Return list of dependencies of ``dists``, 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
-
-
 class FreezeCommand(Command):
     """
     Output installed packages in requirements format.

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]