Fixed #15064 -- Made manage.py honor the existence and value of DJANGO_SETTINGS_MODULE env var. Thanks olau for the report and Shawn Milochik for a patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16222 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/management/__init__.py

@@ -411,7 +411,11 @@ def setup_environ(settings_mod, original_settings_path=None):
     if original_settings_path:
         os.environ['DJANGO_SETTINGS_MODULE'] = original_settings_path
     else:
-        os.environ['DJANGO_SETTINGS_MODULE'] = '%s.%s' % (project_name, settings_name)
+        # If DJANGO_SETTINGS_MODULE is already set, use it.
+        os.environ['DJANGO_SETTINGS_MODULE'] = os.environ.get(
+            'DJANGO_SETTINGS_MODULE',
+            '%s.%s' % (project_name, settings_name)
+        )
 
     # Import the project module. We add the parent directory to PYTHONPATH to
     # avoid some of the path errors new users can have.

tests/regressiontests/admin_scripts/tests.py

@@ -37,8 +37,7 @@ class AdminScriptTestCase(unittest.TestCase):
         if apps is None:
             apps = ['django.contrib.auth', 'django.contrib.contenttypes', 'admin_scripts']
 
-        if apps:
-            settings_file.write("INSTALLED_APPS = %s\n" % apps)
+        settings_file.write("INSTALLED_APPS = %s\n" % apps)
 
         if sdict:
             for k, v in sdict.items():
@@ -119,11 +118,12 @@ class AdminScriptTestCase(unittest.TestCase):
         os.chdir(test_dir)
         try:
             from subprocess import Popen, PIPE
+        except ImportError:
+            stdin, stdout, stderr = os.popen3(cmd)
+        else:
             p = Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
             stdin, stdout, stderr = (p.stdin, p.stdout, p.stderr)
             p.wait()
-        except ImportError:
-            stdin, stdout, stderr = os.popen3(cmd)
         out, err = stdout.read(), stderr.read()
 
         # Restore the old environment
@@ -665,8 +665,8 @@ class ManageDefaultSettings(AdminScriptTestCase):
         "default: manage.py builtin commands fail if settings file (from environment) doesn't exist"
         args = ['sqlall','admin_scripts']
         out, err = self.run_manage(args,'bad_settings')
-        self.assertNoOutput(err)
-        self.assertOutput(out, 'CREATE TABLE')
+        self.assertNoOutput(out)
+        self.assertOutput(err, "Could not import settings 'bad_settings'")
 
     def test_custom_command(self):
         "default: manage.py can execute user commands when default settings are appropriate"
@@ -732,8 +732,8 @@ class ManageFullPathDefaultSettings(AdminScriptTestCase):
         "fulldefault: manage.py builtin commands fail if settings file (from environment) doesn't exist"
         args = ['sqlall','admin_scripts']
         out, err = self.run_manage(args,'bad_settings')
-        self.assertNoOutput(err)
-        self.assertOutput(out, 'CREATE TABLE')
+        self.assertNoOutput(out)
+        self.assertOutput(err, "Could not import settings 'bad_settings'")
 
     def test_custom_command(self):
         "fulldefault: manage.py can execute user commands when default settings are appropriate"
@@ -799,7 +799,7 @@ class ManageMinimalSettings(AdminScriptTestCase):
         args = ['sqlall','admin_scripts']
         out, err = self.run_manage(args,'bad_settings')
         self.assertNoOutput(out)
-        self.assertOutput(err, 'App with label admin_scripts could not be found')
+        self.assertOutput(err, "Could not import settings 'bad_settings'")
 
     def test_custom_command(self):
         "minimal: manage.py can't execute user commands without appropriate settings"
@@ -918,12 +918,11 @@ class ManageMultipleSettings(AdminScriptTestCase):
         self.assertOutput(out, 'CREATE TABLE')
 
     def test_builtin_with_environment(self):
-        "multiple: manage.py builtin commands fail if settings are provided in the environment"
-        # FIXME: This doesn't seem to be the correct output.
+        "multiple: manage.py can execute builtin commands if settings are provided in the environment"
         args = ['sqlall','admin_scripts']
         out, err = self.run_manage(args,'alternate_settings')
-        self.assertNoOutput(out)
-        self.assertOutput(err, 'App with label admin_scripts could not be found.')
+        self.assertNoOutput(err)
+        self.assertOutput(out, 'CREATE TABLE')
 
     def test_builtin_with_bad_settings(self):
         "multiple: manage.py builtin commands fail if settings file (from argument) doesn't exist"
@@ -937,7 +936,7 @@ class ManageMultipleSettings(AdminScriptTestCase):
         args = ['sqlall','admin_scripts']
         out, err = self.run_manage(args,'bad_settings')
         self.assertNoOutput(out)
-        self.assertOutput(err, "App with label admin_scripts could not be found")
+        self.assertOutput(err, "Could not import settings 'bad_settings'")
 
     def test_custom_command(self):
         "multiple: manage.py can't execute user commands using default settings"
@@ -957,8 +956,8 @@ class ManageMultipleSettings(AdminScriptTestCase):
         "multiple: manage.py can execute user commands if settings are provided in environment"
         args = ['noargs_command']
         out, err = self.run_manage(args,'alternate_settings')
-        self.assertNoOutput(out)
-        self.assertOutput(err, "Unknown command: 'noargs_command'")
+        self.assertNoOutput(err)
+        self.assertOutput(out, "EXECUTE:NoArgsCommand")
 
 class ManageSettingsWithImportError(AdminScriptTestCase):
     """Tests for manage.py when using the default settings.py file

tests/regressiontests/settings_tests/tests.py

@@ -1,5 +1,6 @@
 from __future__ import with_statement
-from django.conf import settings
+import os
+from django.conf import settings, global_settings
 from django.test import TestCase
 
 class SettingsTests(TestCase):
@@ -100,3 +101,64 @@ class TrailingSlashURLTests(TestCase):
         self.settings_module.MEDIA_URL = 'http://media.foo.com/stupid//'
         self.assertEqual('http://media.foo.com/stupid//',
                          self.settings_module.MEDIA_URL)
+
+
+class EnvironmentVariableTest(TestCase):
+    """
+    Ensures proper settings file is used in setup_environ if
+    DJANGO_SETTINGS_MODULE is set in the environment.
+    """
+    def setUp(self):
+        self.original_value = os.environ.get('DJANGO_SETTINGS_MODULE')
+
+    def tearDown(self):
+        if self.original_value:
+            os.environ['DJANGO_SETTINGS_MODULE'] = self.original_value
+        elif 'DJANGO_SETTINGS_MODULE' in os.environ:
+            del(os.environ['DJANGO_SETTINGS_MODULE'])
+
+    def test_env_var_used(self):
+        """
+        If the environment variable is set, do not ignore it. However, the
+        kwarg original_settings_path takes precedence.
+
+        This tests both plus the default (neither set).
+        """
+        from django.core.management import setup_environ
+
+        # whatever was already there
+        original_module =  os.environ.get(
+            'DJANGO_SETTINGS_MODULE',
+            'the default'
+        )
+
+        # environment variable set by user
+        user_override = 'custom.settings'
+
+        # optional argument to setup_environ
+        orig_path = 'original.path'
+
+        # expect default
+        setup_environ(global_settings)
+        self.assertEquals(
+            os.environ.get('DJANGO_SETTINGS_MODULE'),
+            original_module
+        )
+
+        # override with environment variable
+        os.environ['DJANGO_SETTINGS_MODULE'] = user_override
+        setup_environ(global_settings)
+
+        self.assertEquals(
+            os.environ.get('DJANGO_SETTINGS_MODULE'),
+            user_override
+        )
+
+        # pass in original_settings_path (should take precedence)
+        os.environ['DJANGO_SETTINGS_MODULE'] = user_override
+        setup_environ(global_settings, original_settings_path = orig_path)
+
+        self.assertEquals(
+            os.environ.get('DJANGO_SETTINGS_MODULE'),
+            orig_path
+        )