Snice you no longer have a
-main in the project, you can't use
lein run to start it up for development. Instead, use
lein ring server, which will run Jetty for you.
If you need to start the server from within a REPL, then you can use the new
repl namespace, which provides
When you're packaging the application as a standalone, you run would now run
lein ring uberjar instead of
lein uberjar. The
-main will be created by
lein-ring for you based on the handler specified in your
This means that all the configuration now lives under
project.clj and gets picked up consistently both in development and production modes.
The new changes also simplify Heroku deployment. You no longer need to specify
+heroku, the application will have all the necessary settings to run on Heroku out of the box.
Finally, I dropped support for Leiningen 1.x as it doesn't have support for profiles. There's no good reason to continue using it instead of upgrading to 2.x.