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recodex-wiki/RuntimeEnvironments.md

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Runtime Environments

This page contains notes about using various runtime environments inside Isolate sandboxes.

Python

Due to a Python bug, the interpreter requires the $HOME variable to be set to something. Otherwise, it tries to look up the UID used by Isolate in /etc/passwd and fails. Setting HOME=/box seems to work.

Java

By default, we use a Groovy script that looks for a class with a main method and executes it for running Java programs. For this setup to work correctly, we need to set the JAVA_HOME environment variable and make sure that $JAVA_HOME/jre/lib/amd64/jvm.cfg is accessible from the isolate sandbox. The file can be a link to a file in a folder in /etc, which also needs to be bound to the sandbox (it is not recommended to bind the whole /etc/ folder into the sandbox).

Also, some versions of /usr/bin/groovy use ls - make sure that it is accessible from the sandbox.