introduce --sitepackages to force sitepackages=True in all

environments.  Was wanted by Debian maintainer Barry Warsaw.

3 files changed, 15 insertions, 2 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 09de503..b7687e2 100755
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -47,6 +47,9 @@
 - introduce --no-network to tox's own test suite to skip tests
   requiring networks
 
+- introduce --sitepackages to force sitepackages=True in all
+  environments.   
+
 1.6.1
 -----
 
diff --git a/tests/test_config.py b/tests/test_config.py
index 5d11d88..b8d0aa3 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -451,6 +451,11 @@ class TestConfigTestEnv:
         # hashseed is random by default, so we can't assert a specific value.
         assert int_hashseed > 0
 
+    def test_sitepackages_switch(self, tmpdir, newconfig):
+        config = newconfig(["--sitepackages"], "")
+        envconfig = config.envconfigs['python']
+        assert envconfig.sitepackages == True
+
     def test_installpkg_tops_develop(self, newconfig):
         config = newconfig(["--installpkg=abc"], """
             [testenv]
diff --git a/tox/_config.py b/tox/_config.py
index e7ac443..6006fa9 100644
--- a/tox/_config.py
+++ b/tox/_config.py
@@ -129,7 +129,10 @@ def prepare_parse(pkgname):
         metavar="REQ", default=None,
         help="Forces a certain version of one of the dependencies "
              "when configuring the virtual environment. REQ Examples "
-             "'pytest<2.4' or 'django>=1.6'.")
+             "'pytest<2.7' or 'django>=1.6'.")
+    parser.add_argument("--sitepackages", action="store_true",
+        help="override sitepackages setting to True in all envs")
+
     parser.add_argument("args", nargs="*",
         help="additional arguments available to command positional substitution")
     return parser
@@ -355,7 +358,9 @@ class parseini:
             name = self._replace_forced_dep(name, config)
             vc.deps.append(DepConfig(name, ixserver))
         vc.distribute = reader.getbool(section, "distribute", False)
-        vc.sitepackages = reader.getbool(section, "sitepackages", False)
+        vc.sitepackages = self.config.option.sitepackages or \
+                          reader.getbool(section, "sitepackages", False)
+
         vc.downloadcache = None
         downloadcache = reader.getdefault(section, "downloadcache")
         if downloadcache: