Uberjar building issue with +handler

[kongeor]

Hello,

when creating a project using +handler:

lein new re-frame foo +handler

and then building a uberjar:

lein uberjar

a part of the output looks like:

Compiling foo.server
2019-11-24 12:39:16.597:INFO::main: Logging initialized @3424ms to org.eclipse.jetty.util.log.StdErrLog
Compiling foo.server
[:app] Compiling ...
[:app] Build completed. (94 files, 0 compiled, 0 warnings, 7.91s)
Warning: The Main-Class specified does not exist within the jar. It may not be executable as expected. A gen-class directive may be missing in the namespace which contains the main method, or the namespace has not been AOT-compiled.

as expected trying to run the jar (java -jar target/foo.jar) will fail with:

Error: Could not find or load main class foo.server

Also, not sure why Compiling foo.server appears twice.

After some digging and comparing the project.clj with other projects that work as expected, it looks like the prod alias is the one causing this issue:

            "prod"         ["with-profile" "prod" "do"
                            ["clean"]
                            ["run" "-m" "shadow.cljs.devtools.cli" "release" "app"]]

removing the ["clean"] task resolves this.

Not sure if this is a Leiningen issue or if it is a more complicated combination of different factors.

[gadfly361]

@kongeor Please give this a try:

lein clean
lein with-profile prod uberjar

[kongeor]

@gadfly361 no change. Behavior is exactly the same as before.

[superstructor]

Sorry for the delay. Hopefully I'll have time to look at this for the next release.

[superstructor]

I've looked into this but havn't worked it out.

• The foo.server ns exists.
• The foo.server ns has (:gen-class).
• The uberjar profile appears to be configured as per lein documentation
• The uberjar profile appears to be applied.
• DEBUG true lein with-profile uberjar pprint is pretty much what I would expect except it does seem odd that it prints Compiling foo.server twice for something that doesn't even end up in the JAR.

I don't use uberjars a lot so would appreciate any help from someone who uses this more often.

Also note the compiled JS does not appear to be included in the uberjar, and it probably should be with another fix. Maybe :extra-paths ["resources"]. In any case will need to fix this issue first.

[dpassen]

I looked into this as part of https://stackoverflow.com/questions/59580237/lein-uberjar-not-setting-main-class-properly

The uberjar profile calls ["compile" ["prod"]] in :prep-tasks. The "prod" alias calls "clean" and "target" is listed in :clean-targets.

[superstructor]

Thanks for investigating this and finding the cause @dpassen !