Graal jrunscript does not work

[davidpcaldwell]

Graal version: 1.0.0-rc3 (Mac OS X)

Graal command:
jrunscript jrunscript.js

Script (jrunscript.js)
print("Hello, jrunscript!");

Graal result:
script error in file : org.graalvm.polyglot.PolyglotException: ReferenceError: java is not defined
Exit status: 10

Expected result (JVM jrunscript)
Hello, jrunscript!

[iamstolis]

Thank you for your report. You are right, jrunscript is broken in GraalVM rc3. jrunscript uses ScriptEngine internally and executes some initialization script on the start-up. This initialization script uses some JavaScript extensions like java, JSAdapter provided by Nashorn engine by default. Unfortunately, the ScriptEngine wrapping Graal JavaScript has the support for these extensions turned off (by default). That's why the execution fails with the complains about unknown global variable called java.

We will fix this problem by enabling the mentioned extensions in our implementation of ScriptEngine. You can experiment with turning these extensions on explicitly using jrunscript -Dtruffle.js.NashornJavaInterop=true (in rc3 build) but note that this option is experimental and will disappear in future.

[iamstolis]

This problem has been fixed by oracle/graaljs@50995a3 i.e. it will be part of rc5 build (hopefully). In case you switch to rc4 build before that note that a different workaround is needed there: you can use jrunscript -J-Dpolyglot.js.nashorn-compat=true. Plain jruncript should work in rc5 (once it is released).

[davidpcaldwell]

Actually, @iamstolis, it worked out-of-the-box:

Graal command:
js --js.nashorn-compat=true --jvm jrunscript.js

Script (jrunscript.js)
print("Hello, jrunscript!");


Graal result (1.0.0-rc4):
Hello, jrunscript!

Expected result (JVM jjs)
Hello, jrunscript!

[lscoughlin]

so like...

🦄 ~ $ uname -a
Darwin mbp-2016.attlocal.net 18.7.0 Darwin Kernel Version 18.7.0: Thu Jun 18 20:50:10 PDT 2020; root:xnu-4903.278.43~1/RELEASE_X86_64 x86_64

🦄 ~ $ which jrunscript
/Library/Java/JavaVirtualMachines/graalvm-ee-java11-20.2.0/Contents/Home/bin/jrunscript

🦄 ~ $ jrunscript -e "print('hello world');"
script error in file <system-init> : org.graalvm.polyglot.PolyglotException: ReferenceError: java is not defined