Add minimal fast_app for the ToolShed

lib/tool_shed/webapp/fast_app.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from fastapi.middleware.wsgi import WSGIMiddleware
+
+
+def initialize_fast_app(gx_webapp):
+    app = FastAPI()
+    wsgi_handler = WSGIMiddleware(gx_webapp)
+    app.mount('/', wsgi_handler)
+    return app

lib/tool_shed/webapp/fast_factory.py

@@ -0,0 +1,27 @@
+import os
+
+from galaxy.util.properties import find_config_file
+from galaxy.web_stack import get_app_kwds
+from tool_shed.webapp.buildapp import app_factory
+from .fast_app import initialize_fast_app
+
+APP_NAME = "tool_shed"
+
+
+def factory():
+    kwds = get_app_kwds(APP_NAME, APP_NAME)
+    config_file = kwds.get("config_file")
+    if not config_file and os.environ.get('TOOL_SHED_CONFIG_FILE'):
+        config_file = os.path.abspath(os.environ["TOOL_SHED_CONFIG_FILE"])
+    else:
+        config_file = find_config_file([APP_NAME])
+
+    config_section = APP_NAME
+
+    if 'config_file' not in kwds:
+        kwds['config_file'] = config_file
+    if 'config_section' not in kwds:
+        kwds['config_section'] = config_section
+    global_conf = {}
+    gx_webapp = app_factory(global_conf=global_conf, load_app_kwds=kwds, wsgi_preflight=False)
+    return initialize_fast_app(gx_webapp)