pip freeze is not recursive by default. Added --recursive option to make it recursive. Refs pypa#1308.

Author: benoitbryon

pip/commands/freeze.py

@@ -65,6 +65,12 @@ def __init__(self, *args, **kw):
             action='store_true',
             default=False,
             help='Only output packages installed in user-site.')
+        self.cmd_opts.add_option(
+            '--recursive',
+            dest='recursive',
+            action='store_true',
+            default=False,
+            help="Freeze packages and dependencies, recursively.")
 
         self.parser.insert_option_group(0, self.cmd_opts)
 
@@ -73,6 +79,7 @@ def run(self, options, args):
         find_links = options.find_links or []
         local_only = options.local
         user_only = options.user
+        recursive = options.recursive
         # FIXME: Obviously this should be settable:
         find_tags = False
         skip_match = None
@@ -99,19 +106,22 @@ def run(self, options, args):
 
         only_dists = []
         if args:
+            # Freeze only a subset of installed packages.
             only_dists = args
-            only_dists.extend(get_recursive_dependencies(*only_dists))
+            if recursive:  # Freeze dependencies, recursively.
+                only_dists.extend(get_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,
                                                 user_only=user_only):
-            req = pip.FrozenRequirement.from_dist(
-                dist,
-                dependency_links,
-                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,
+                    dependency_links,
+                    find_tags=find_tags,
+                )
+                installations[req.name] = req
         if requirement:
             req_f = open(requirement)
             for line in req_f:

tests/functional/test_freeze.py

@@ -385,3 +385,59 @@ def test_freeze_user(script, virtualenv):
         <BLANKLINE>""")
     _check_output(result, expected)
     assert 'simple2' not in result.stdout
+
+
+def test_freeze_distributions(script):
+    """Test that output is filtered if arguments are specified."""
+    # Install some distributions.
+    script.scratch_path.join("initools-req.txt").write(textwrap.dedent("""\
+        simple==2.0
+        requiresupper==1.0
+        """))
+    script.pip_install_local(
+        '-r', script.scratch_path / 'initools-req.txt',
+    )
+    # Freeze a single package.
+    result = script.pip('freeze', 'simple', expect_stderr=True)
+    expected = textwrap.dedent("""\
+        Script result: pip freeze simple
+        -- stdout: --------------------
+        simple==2.0
+        <BLANKLINE>""")
+    _check_output(result, expected)
+    # Freeze a single package does not show dependencies by default.
+    result = script.pip('freeze', 'requiresupper', expect_stderr=True)
+    expected = textwrap.dedent("""\
+            Script result: pip freeze requiresupper
+            -- stdout: --------------------
+            requiresupper==1.0
+            <BLANKLINE>""")
+    _check_output(result, expected)
+    # Freeze multiple packages.
+    result = script.pip('freeze', 'simple', 'requiresupper',
+                        expect_stderr=True)
+    expected = textwrap.dedent("""\
+            Script result: pip freeze simple requiresupper
+            -- stdout: --------------------
+            requiresupper==1.0
+            simple==2.0
+            <BLANKLINE>""")
+    _check_output(result, expected)
+    # Freeze is case insensitive.
+    result = script.pip('freeze', 'SiMPLe', expect_stderr=True)
+    expected = textwrap.dedent("""\
+            Script result: pip freeze SiMPLe
+            -- stdout: --------------------
+            simple==2.0
+            <BLANKLINE>""")
+    _check_output(result, expected)
+    # Freeze is optionally recursive.
+    result = script.pip('freeze', '--recursive', 'requiresupper',
+                        expect_stderr=True)
+    expected = textwrap.dedent("""\
+            Script result: pip freeze --recursive requiresupper
+            -- stdout: --------------------
+            requiresupper==1.0
+            Upper==2.0
+            <BLANKLINE>""")
+    _check_output(result, expected)