s4-python: Add convenience function for forcibly importing bundled

package.

2 files changed, 17 insertions, 4 deletions

diff --git a/source4/scripting/bin/subunitrun b/source4/scripting/bin/subunitrun
index 9717c9e345..21243a73ec 100755
--- a/source4/scripting/bin/subunitrun
+++ b/source4/scripting/bin/subunitrun
@@ -29,10 +29,8 @@ samba.ensure_external_module("subunit", "subunit/python")
 try:
     from subunit.run import SubunitTestRunner, TestProgram
 except ImportError:
-    del sys.modules["subunit"]
-    if "subunit.run" in sys.modules:
-        del sys.modules["subunit.run"]
-    samba.import_bundled_package("subunit", "subunit/python")
+    samba.force_bundled_package("testtools", "testtools")
+    samba.force_bundled_package("subunit", "subunit/python")
     from subunit.run import SubunitTestRunner, TestProgram
 import samba.getopt as options
 import samba.tests
diff --git a/source4/scripting/python/samba/__init__.py b/source4/scripting/python/samba/__init__.py
index b6c53f4b2c..6fcac16691 100644
--- a/source4/scripting/python/samba/__init__.py
+++ b/source4/scripting/python/samba/__init__.py
@@ -324,6 +324,21 @@ def import_bundled_package(modulename, location):
             "samba.external.%s" % modulename, fromlist=["samba.external"])
 
 
+def force_bundled_package(packagename, location):
+    """Forcibly use the bundled package.
+
+    This will first unload the system module and then load the bundled one.
+
+    :param packagename: The package name
+    :param location: Location to add to sys.path (can be relative to
+        ${srcdir}/lib)
+    """
+    for m in sys.modules.keys():
+        if m.startswith("%s." % packagename):
+            del sys.modules[m]
+    import_bundled_package(packagename, location)
+
+
 def ensure_external_module(modulename, location):
     """Add a location to sys.path if an external dependency can't be found.