A project to test out transitive dependencies in ClojureDart. Specifically, I have a ClojureDart library, transit-cljd, which depends on a Dart package, transit_dart. The goal here is to have all of these dependencies available by simply including transit-cljd in deps.edn.

Tag baseline is the first example, with all the dependencies handled manually. It works in that I can send transit messages between front-end and back-end. But I have installed all the dependencies myself, including a local (manual) copy of the wevre.transit-cljd namespace under the src directory, and reference to transit_dart in pubspec.yaml.

Next step is to remove the manual copy of wevre.transit-cljd under the src directory and pick it up instead with a reference in deps.edn. This is the version tagged cljd-deps. That works. Good.

Now we want to remove transit_dart from pubspec.yaml, with the expectation that it will get picked up as a transitive dependency by the ClojureDart compiler. Baptiste Dupuche has created a version of ClojureDart that is meant to do this: include transitive dependencies for Dart packages that are found in ClojureDart libraries. This version is tagged with remove-transit_dart. I can't get this version to work, when attempting to compile namespace wevre.transit-cljd (which comes from the transit-cljd library) there is an error about not finding 'package:transit_dart/transit_dart.dart'.

I checked with Baptiste and I need to use the version he created of ClojureDart, the version that pulls in dependencies, I need to use that version in both this sample project, and in the transit-cljd project. I don't think that will be expected in the future, but for now, since this is all a work in progress, it is needed. There is a new tag of this project, same-hash, where everyone is now using the same version of ClojureDart.

This project is a combination of a ClojureDart+Flutter frontend, and a Clojure backend running a Jetty server to receive transit requests and serve back transit responses. There is very little error checking, and by 'very little' I mean 'none'. The front-end is a simple form with two fields. You type in two numbers and hit the button. The values of the fields are sent as a map to the server, which adds them together, and provides a response string of the summation. I know, very sophisticated.

To get the backend server up and running, start a Clojure repl with the clj alias, load/evaluate the adapter namespace, and execute the go function. You can stop the server with the halt! function. I'm using VS Code and Calva, so I simply jack-in and run things from the editor. But from the command-line, one could do:

clj -M:clj
user=> (require '[adapter])
user=> (adapter/go)