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Lib/site-packages/virtualenv/run/plugin/discovery.py

@@ -0,0 +1,32 @@
+from __future__ import absolute_import, unicode_literals
+
+from .base import PluginLoader
+
+
+class Discovery(PluginLoader):
+    """"""
+
+
+def get_discover(parser, args):
+    discover_types = Discovery.entry_points_for("virtualenv.discovery")
+    discovery_parser = parser.add_argument_group(
+        title="discovery",
+        description="discover and provide a target interpreter",
+    )
+    discovery_parser.add_argument(
+        "--discovery",
+        choices=_get_default_discovery(discover_types),
+        default=next(i for i in discover_types.keys()),
+        required=False,
+        help="interpreter discovery method",
+    )
+    options, _ = parser.parse_known_args(args)
+    discover_class = discover_types[options.discovery]
+    discover_class.add_parser_arguments(discovery_parser)
+    options, _ = parser.parse_known_args(args, namespace=options)
+    discover = discover_class(options)
+    return discover
+
+
+def _get_default_discovery(discover_types):
+    return list(discover_types.keys())