Assure bindep can be called as a module

- assure we can all bindep as a module (python -m bindep)
- add test the assures output is the same regardless how is called
- include argparse fix which needs to know executable name when
  called as modules.
- enables use of bindep without needing to have it in PATH

Change-Id: Ib2aac359e2f23cb0ac7857835905e0a02e90888d

bindep/__main__.py

@@ -27,7 +27,7 @@ logging.basicConfig(
 
 
 def main(depends=None):
-    parser = argparse.ArgumentParser()
+    parser = argparse.ArgumentParser(prog="bindep")
     parser.add_argument(
         "--brief", "-b", action="store_true", dest="brief",
         help="List only missing packages one per line.")

bindep/tests/test_main.py

@@ -16,6 +16,8 @@
 # limitations under the License.
 
 import os
+import subprocess
+import sys
 from textwrap import dedent
 
 from fixtures import FakeLogger
@@ -25,7 +27,7 @@ from fixtures import TempDir
 import mock
 from testtools import TestCase
 
-from bindep.main import main
+from bindep.__main__ import main
 
 
 class MainFixture(Fixture):
@@ -196,3 +198,11 @@ class TestMain(TestCase):
         depends.platform_profiles.assert_called_once_with()
         depends.active_rules.assert_called_once_with(["default"])
         depends.check_rules.assert_called_once_with([])
+
+    def test_called_as_module(self):
+        """Assures calling as module reports the same version."""
+        result = subprocess.check_output(
+            ["bindep", "--version"])
+        result2 = subprocess.check_output(
+            [sys.executable, "-m", "bindep", "--version"])
+        assert result == result2

doc/source/contributing.rst

@@ -16,7 +16,7 @@ here is a basic outline of the source implementation:
 .. automodule:: bindep.depends
    :members:
 
-.. automodule:: bindep.main
+.. automodule:: bindep.__main__
    :members:
 
 

setup.cfg

@@ -33,7 +33,7 @@ warnerrors = True
 
 [entry_points]
 console_scripts =
-    bindep = bindep.main:main
+    bindep = bindep.__main__:main
 
 [wheel]
 universal = 1