1 files changed, 45 insertions, 0 deletions
diff --git a/lib/spack/external/nose/plugins/deprecated.py b/lib/spack/external/nose/plugins/deprecated.py
new file mode 100644
index 0000000000..461a26be63
--- /dev/null
+++ b/lib/spack/external/nose/plugins/deprecated.py
@@ -0,0 +1,45 @@
+"""
+This plugin installs a DEPRECATED error class for the :class:`DeprecatedTest`
+exception. When :class:`DeprecatedTest` is raised, the exception will be logged
+in the deprecated attribute of the result, ``D`` or ``DEPRECATED`` (verbose)
+will be output, and the exception will not be counted as an error or failure.
+It is enabled by default, but can be turned off by using ``--no-deprecated``.
+"""
+
+from nose.plugins.errorclass import ErrorClass, ErrorClassPlugin
+
+
+class DeprecatedTest(Exception):
+    """Raise this exception to mark a test as deprecated.
+    """
+    pass
+
+
+class Deprecated(ErrorClassPlugin):
+    """
+    Installs a DEPRECATED error class for the DeprecatedTest exception. Enabled
+    by default.
+    """
+    enabled = True
+    deprecated = ErrorClass(DeprecatedTest,
+                            label='DEPRECATED',
+                            isfailure=False)
+
+    def options(self, parser, env):
+        """Register commandline options.
+        """
+        env_opt = 'NOSE_WITHOUT_DEPRECATED'
+        parser.add_option('--no-deprecated', action='store_true',
+                          dest='noDeprecated', default=env.get(env_opt, False),
+                          help="Disable special handling of DeprecatedTest "
+                          "exceptions.")
+
+    def configure(self, options, conf):
+        """Configure plugin.
+        """
+        if not self.can_configure:
+            return
+        self.conf = conf
+        disable = getattr(options, 'noDeprecated', False)
+        if disable:
+            self.enabled = False