Clojurians Log v2

Is there a straightforward way of getting the generated executable's location at run time?

(System/getProperty "user.dir") - What happens with that?

@chris441 He means the executable that is currently being executed. E.g. when you run bb -e '(+ 1 2 3)', you want to see /usr/local/bin/bb or so

Ah, got it

Someone in the GraalVM slack told me that Graal has an API for this

(GraalVM slack = https://app.slack.com/client/TN37RDLPK)

but I haven't found it

One use case for this is to have an upgrade command so an executable can update itself (not sure if that's a good idea, but exploring the possibilities)

Does the answer need to be cross platform? What platform is the query on?

For unix there are PID-related ways to do this.

yes, cross platform

ProcessProperties.getExecutableName()

https://www.graalvm.org/sdk/javadoc/index.html?org/graalvm/nativeimage/ProcessProperties.html

user=> (org.graalvm.nativeimage.ProcessProperties/getExecutableName)
Execution error (Error) at org.graalvm.nativeimage.impl.ImageSingletonsSupport/checkInstalled (ImageSingletonsSupport.java:69).
The class ImageSingletons can only be used when building native images, i.e., when using the native-image command.

should be able to run this within a graalvm native image

wow, the exec method looks interesting: https://www.graalvm.org/sdk/javadoc/index.html?org/graalvm/nativeimage/ProcessProperties.html

@lukaszkorecki That's what you asked recently ^

$ ./bb -e '(do (prn (org.graalvm.nativeimage.ProcessProperties/getProcessID)) (org.graalvm.nativeimage.ProcessProperties/exec (fs/path "/bin/bash") (into-array String [""])))'
28122
bash-3.2$ ps aux | grep 28122
borkdude         28124   0.0  0.0  4399112    904 s015  S+    9:23PM   0:00.00 grep 28122
borkdude         28122   0.0  0.0  4431696   1600 s015  S     9:23PM   0:00.03 TERM_SESSION_ID=w2t2p0:5035ECFF-A5DD-4DF9-9A67-6C736151E9AF

Getting the executable name:

$ ./bb -e '(org.graalvm.nativeimage.ProcessProperties/getExecutableName)'
"/Users/borkdude/Dropbox/dev/clojure/babashka/bb"