Prefix string too short

[au-phiware]

Describe the bug

Attempting to build an uberjar with Selenium as a dependency raises the following exception:

clojure.lang.ExceptionInfo: Prefix string "9" too short: length must be at least 3

To Reproduce

build.boot:

(set-env!
  :resource-paths #{"."}
  :dependencies '[[org.clojure/clojure                            "1.10.1"]
                  [org.seleniumhq.selenium/selenium-support       "3.141.59"]
                  [org.seleniumhq.selenium/selenium-remote-driver "3.141.59"]])

(task-options!
  pom {:project 'selenium :version "0.1.0-SNAPSHOT"}
  aot {:namespace #{'selenium}}
  jar {:main 'selenium})

boot.properties:

BOOT_VERSION=2.8.3
BOOT_CLOJURE_VERSION=1.10.1
BOOT_CLOJURE_NAME=org.clojure/clojure

selenium.clj:

(ns selenium (:gen-class))
(defn -main [& args] ())

Run boot aot pom uber jar target

Expected behavior

Successful build and jar written to disk.

Actual behavior

Compiling 1/1 selenium...
Writing pom.xml and pom.properties...
Adding uberjar entries...
                              java.lang.Thread.run              Thread.java:  832
java.util.concurrent.ThreadPoolExecutor$Worker.run  ThreadPoolExecutor.java:  630
 java.util.concurrent.ThreadPoolExecutor.runWorker  ThreadPoolExecutor.java: 1130
               java.util.concurrent.FutureTask.run          FutureTask.java:  264
                                               ...
               clojure.core/binding-conveyor-fn/fn                 core.clj: 2030
                                 boot.core/boot/fn                 core.clj: 1031
                               boot.core/run-tasks                 core.clj: 1022
              boot.task.built-in/eval2944/fn/fn/fn             built_in.clj:  800
              boot.task.built-in/eval2662/fn/fn/fn             built_in.clj:  576
              boot.task.built-in/eval2828/fn/fn/fn             built_in.clj:  753
                               clojure.core/reduce                 core.clj: 6828
                       clojure.core.protocols/fn/G            protocols.clj:   13
                         clojure.core.protocols/fn            protocols.clj:   75
                 clojure.core.protocols/seq-reduce            protocols.clj:   31
                       clojure.core.protocols/fn/G            protocols.clj:   19
                         clojure.core.protocols/fn            protocols.clj:  168
            boot.task.built-in/eval2828/fn/reducer             built_in.clj:  733
                                               ...
                     boot.core/add-cached-resource                 core.clj:  622
                     boot.core/add-cached-resource                 core.clj:  632
                 boot.tmpdir.TmpFileSet/add-cached               tmpdir.clj:  308
                          boot.tmpdir/merge-trees!               tmpdir.clj:  187
                        boot.tmpdir/apply-mergers!               tmpdir.clj:  148
                       java.io.File.createTempFile                File.java: 2083
java.lang.IllegalArgumentException: Prefix string "9" too short: length must be at least 3
        clojure.lang.ExceptionInfo: Prefix string "9" too short: length must be at least 3
    line: 15

Desktop:

I used a container to run the above i.e.

docker run -it --rm -v "$PWD":/usr/src/app -w /usr/src/app clojure:openjdk-15-boot-2.8.3-alpine boot aot pom uber jar target

[au-phiware]

Running boot -vv ... provides ALOT more information... but it mentions a "duplicate entry":

Adding uberjar entries...
Adding cached fileset cdc814c87d5e7bbc0165371795a51643...
Adding cached fileset 957c53796f5c1649094808dddcb9dd27...
Adding cached fileset 45dc4650fe3a118fc0016597faefdd6b...
Adding cached fileset 18b6e7cc2e8fc01a92506fae0fe01e41...
Adding cached fileset 12927bfd657ccc3745660f1c6f748665...
Adding cached fileset 30885522678e56bcd4a6569c4280f2b7...
Adding cached fileset 8c0236e54e32978531eea3a62d67160a...
Merging META-INF/versions/9...
Merging duplicate entry (META-INF/versions/9)
clojure.lang.ExceptionInfo: Prefix string "9" too short: length must be at least 3 {:line 16}
	at boot.main$_main$fn__1630.invoke(main.clj:222)
	at boot.main$_main.invokeStatic(main.clj:216)
	at boot.main$_main.invoke(main.clj:123)
	at clojure.lang.Var.invoke(Var.java:399)
	at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:154)
	at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:145)
	at boot.App.runBoot(App.java:407)
	at boot.App.main(App.java:500)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at Boot.main(Boot.java:257)
Caused by: java.lang.IllegalArgumentException: Prefix string "9" too short: length must be at least 3
	at java.base/java.io.File.createTempFile(File.java:2083)
	at boot.tmpdir$apply_mergers_BANG_.invoke(tmpdir.clj:148)
	at boot.tmpdir$merge_trees_BANG_.invoke(tmpdir.clj:187)
	at boot.tmpdir.TmpFileSet.add_cached(tmpdir.clj:308)
	at boot.core$add_cached_resource.invokeStatic(core.clj:632)
	at boot.core$add_cached_resource.doInvoke(core.clj:622)
	at clojure.lang.RestFn.invoke(RestFn.java:731)
	at boot.task.built_in$eval2828$fn__2829$reducer__2840.invoke(built_in.clj:733)
	at clojure.core.protocols$fn__8159.invokeStatic(protocols.clj:168)
	at clojure.core.protocols$fn__8159.invoke(protocols.clj:124)
	at clojure.core.protocols$fn__8114$G__8109__8123.invoke(protocols.clj:19)
	at clojure.core.protocols$seq_reduce.invokeStatic(protocols.clj:31)
	at clojure.core.protocols$fn__8146.invokeStatic(protocols.clj:75)
	at clojure.core.protocols$fn__8146.invoke(protocols.clj:75)
	at clojure.core.protocols$fn__8088$G__8083__8101.invoke(protocols.clj:13)
	at clojure.core$reduce.invokeStatic(core.clj:6828)
	at clojure.core$reduce.invoke(core.clj:6810)
	at boot.task.built_in$eval2828$fn__2829$fn__2844$fn__2845.invoke(built_in.clj:753)
	at boot.task.built_in$eval2662$fn__2663$fn__2678$fn__2679.invoke(built_in.clj:576)
	at boot.task.built_in$eval2944$fn__2945$fn__2954$fn__2955.invoke(built_in.clj:800)
	at boot.core$run_tasks.invokeStatic(core.clj:1022)
	at boot.core$run_tasks.invoke(core.clj:1016)
	at boot.core$boot$fn__1281.invoke(core.clj:1031)
	at clojure.core$binding_conveyor_fn$fn__5754.invoke(core.clj:2030)
	at clojure.lang.AFn.call(AFn.java:18)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:832)

Can I work-around the problem with some :exclusions in the dependencies?

[au-phiware]

So the versions directory has something to do with multi-release jars, and in my case it's empty so I was able to work-around the issue by adding an extra exclude pattern to the uber task, i.e.

(task-options!
  uber {:exclude #{#"(?i)^META-INF/INDEX.LIST$"
                   #"(?i)^META-INF/[^/]*\.(MF|SF|RSA|DSA)$"
                   #"(?i)^META-INF/versions/.$"}}
  ...)

But in general I suppose that the apply-mergers! will want to deal with one (and two) character directory names.