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Hi! I’m trying to build an uberjar and getting exception

Execution error (ExceptionInfo) at clojure.tools.build.tasks.uber/explode (uber.clj:172).
Cannot write META-INF/license/LICENSE.tomcat-native.txt from io.netty/netty-tcnative-boringssl-static as parent dir is a file from another lib. One of them must be excluded.

we had this issue. If you can run from a repl, the temp dir is still around ( i believe it is deleted on process exit) so you can go see. We found that there is a META-INF/LICENSE file and on case insensitive file systems (osx) this means that LICENSE and license/LICENSE cannot coexist

aha, thanks! will check

short of that i think you would need to create a basis and look through each jar for which one had the offending file and then report that

unfortunately at the point where that message is created, I do not know which lib explode put it on disk originally

but the right solution here is probably to add a conflict handler - there is one for licenses, but this is outside its regex

api doc is at https://clojure.github.io/tools.build/clojure.tools.build.api.html#var-uber

at the bottom you can see the default conflict handlers

{"^data_readers.clj[cs]?$" :data_readers
   "^META-INF/services/" :append
   "(?i)^(META-INF/)?(COPYRIGHT|NOTICE|LICENSE)(\.(txt|md))?$" :append-dedupe
   :default :ignore}

thanks btw there is a small mistake in that doc - :data-reader instead of :data_readers and “(?i)^(META-INF/)?(COPYRIGHT|NOTICE|LICENSE)(\.(txt|md))?$” should be “(?i)^(META-INF/)?(COPYRIGHT|NOTICE|LICENSE)(\\.(txt|md))?$”

you can supply :conflict-handlers {"(?i)^META-INF/license/LICENSE.tomcat-native.txt" :append-dedupe}

same exception ( looks like this is the problem of MacOS filesystem

it looks like conflict handlers only get triggered when the same file already exists? if so i don't think it can help in this situation right?

right

oh right, sorry, I'm crossing things

this is the file/directory conflict

the problem is there is a file META-INF/license already on disk

so it can't make the directory META-INF/LICENSE/

so the only solution atm is to exclude one or the other file

yeah, it works after adding to :exclude list

@delaguardo We ran into that and it was coming from io.gprc/grpc-netty-shaded (I think) and we excluded that and added a dep on io.gprc/gprc-okhttp which is an alternate impl and that worked fine (and produced a smaller uberjar).

Yeah, here it is, from the Google Cloud Vision deps:

com.google.cloud/google-cloud-vision {:mvn/version "1.103.7"
                                        :exclusions [io.grpc/grpc-netty-shaded]}
  io.grpc/grpc-okhttp {:mvn/version "1.39.0"}