add script to autogen, it's a hack by creating/upgading a db, but works

Looks like this is the only way:
https://github.com/sqlalchemy/alembic/discussions/1086

ui/medashare/alembic.ini

@@ -55,7 +55,7 @@ version_path_separator = os  # Use os.pathsep. Default configuration used for ne
 # are written from script.py.mako
 # output_encoding = utf-8
 
-sqlalchemy.url = sqlite+pysqlite:///:memory:
+sqlalchemy.url = sqlite+pysqlite:///autogen.db.sqlite3
 
 
 [post_write_hooks]

ui/medashare/alembic/README

@@ -3,9 +3,9 @@ New Version
 
 To create a revision, update the ORM in medashare/orm.py.
 
-Then run:
+Then in the medashare directory, run:
 ```
-alembic revision --autogenerate -m 'what you did'
+./autogen.sh "message of what you did"
 ```
 
 This will create a version file.  Edit the version file to support the

ui/medashare/autogen.sh

@@ -0,0 +1,22 @@
+#
+# Script to auto generate any orm changes.
+#
+
+if [ -z "$*" ]; then
+	echo "Provide the upgrade message as an argument."
+	exit 1
+fi
+
+set -e
+
+# Make sure we start clean
+rm -f autogen.db.sqlite3
+
+# Upgrade the database to head
+alembic upgrade head
+
+# Autogenerate the migrations
+alembic revision --autogenerate -m "$*"
+
+# Clean up
+rm -f autogen.db.sqlite3