python: Implement and expose Environment::reduced_username

It was forgotten in 917cc160a which introduced this pure virtual
function in the `Environment` base class:

/var/tmp/paludis/build/sys-apps-paludis-scm/work/paludis-scm/python/environment.cc:48:7: note:   because the following virtual functions are pure within 'EnvironmentImplementationWrapper':
 class EnvironmentImplementationWrapper :
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /var/tmp/paludis/build/sys-apps-paludis-scm/work/paludis-scm/paludis/environment_implementation.hh:23:0,
                 from /var/tmp/paludis/build/sys-apps-paludis-scm/work/paludis-scm/paludis/environments/paludis/paludis_environment.hh:23,
                 from /var/tmp/paludis/build/sys-apps-paludis-scm/work/paludis-scm/python/environment.cc:24:
/var/tmp/paludis/build/sys-apps-paludis-scm/work/paludis-scm/paludis/environment.hh:427:33: note:       virtual std::__cxx11::string paludis::Environment::reduced_username() const
             virtual std::string reduced_username() const = 0;
                                 ^~~~~~~~~~~~~~~~

2 files changed, 21 insertions, 0 deletions

diff --git a/python/environment.cc b/python/environment.cc
index b0274b1..8fe9357 100644
--- a/python/environment.cc
+++ b/python/environment.cc
@@ -167,6 +167,16 @@ class EnvironmentImplementationWrapper :
                 throw PythonMethodNotImplemented("EnvironmentImplementation", "hook_dirs");
         }
 
+        virtual std::string reduced_username() const
+        {
+            std::unique_lock<std::recursive_mutex> l(get_mutex());
+
+            if (bp::override f = get_override("reduced_username"))
+                return f();
+            else
+                throw PythonMethodNotImplemented("EnvironmentImplementation", "reduced_username");
+        }
+
         virtual uid_t reduced_uid() const
         {
             std::unique_lock<std::recursive_mutex> l(get_mutex());
@@ -504,6 +514,11 @@ void expose_environment()
                 "Return true if the first repository is more important than the second."
             )
 
+        .def("reduced_username", &Environment::reduced_username,
+                "reduced_username() -> str\n"
+                "User name to use when reduced privs are permissible."
+            )
+
         .def("reduced_uid", &Environment::reduced_uid,
                 "reduced_uid() -> int\n"
                 "User id to use when reduced privs are permissible."
@@ -583,6 +598,11 @@ void expose_environment()
                 "Return directories to search for hooks."
             )
 
+        .def("reduced_username", bp::pure_virtual(&EnvImp::reduced_username),
+                "reduced_username() -> str\n"
+                "User name to use when reduced privs are permissible."
+            )
+
         .def("reduced_uid", bp::pure_virtual(&EnvImp::reduced_uid),
                 "reduced_uid() -> int\n"
                 "User id to use when reduced privs are permissible."
diff --git a/python/environment_TEST.py b/python/environment_TEST.py
index bba853b..7f95edc 100755
--- a/python/environment_TEST.py
+++ b/python/environment_TEST.py
@@ -58,6 +58,7 @@ class TestCase_01_Environments(unittest.TestCase):
                 Filter.SupportsUninstallAction())
 
     def test_25_reduced(self):
+        self.assert_(self.e.reduced_username() != "")
         self.assert_(self.e.reduced_uid() >= 0)
         self.assert_(self.e.reduced_gid() >= 0)