Unable to reload babashka.process/exec

[lread]

version

❯ bb --version
babashka v1.3.179

platform
Repro on Linux, but should apply to all.

problem
Babashka comes bundled with babashka.processs built in.
Sometimes a newer version of babashka.process becomes available.

For example, at the time of this writing, a newer version of babashka.process is available with a :cmd opt feature.

A user can opt to use the newer version via a ns reload.
This works great in general, but not for the exec function.

repro
Given a bb.edn that specifies the new version:

{:deps {babashka/process {:mvn/version "0.5.19"}}}

Here's a REPL session that shows the behaviour.
We'll start off using built-in babashka.process:

❯ rlwrap bb
Babashka v1.3.179 REPL.
Use :repl/quit or :repl/exit to quit the REPL.
Clojure rocks, Bash reaches.

user=> (require '[babashka.process :as p])
nil

And now let's call a new feature that is not yet in bb (it will fail):

user=> (p/shell {:cmd ["ls" "-l"]})
java.lang.NullPointerException [at <repl>:2:1]

And we'll reload the ns to get the updated version specified in bb.edn and retry our command (it will work)

user=> (require '[babashka.process :as p] :reload)
nil
user=> (p/shell {:cmd ["ls" "-l"]})
total 4
-rw-rw-r-- 1 lee lee 51 May 13 12:39 bb.edn
{:proc #object[java.lang.ProcessImpl 0x6d1bac37 "Process[pid=66629, exitValue=0]"], :exit 0, :in #object[java.lang.ProcessBuilder$NullOutputStream 0x73925281 "java.lang.ProcessBuilder$NullOutputStream@73925281"], :out #object[java.lang.ProcessBuilder$NullInputStream 0x1affa17d "java.lang.ProcessBuilder$NullInputStream@1affa17d"], :err #object[java.lang.ProcessBuilder$NullInputStream 0x1affa17d "java.lang.ProcessBuilder$NullInputStream@1affa17d"], :prev nil, :cmd ["ls" "-l"]}

Now let's try a call to exec to show the issue:

user=> (p/exec "ls -l")
clojure.lang.ExceptionInfo: exec is not supported in non-GraalVM environments [at babashka/process.cljc:612:8]

expected behavior
exec should also work after ns reload.

thoughts
I am guessing that if bb exposed org.graalvm.nativeimage.ProcessProperties/exec this should work.

next steps
I'll experiment and follow up.

[borkdude]

right, making org.graalvm.nativeimage.ProcessProperties available in bb should solve that

Let's limit it to the "exec" method in the :custom map to save space