NullPointerException when launching Kotlin QTConsole (if jupyter is not a available in the PATH)

[jhhcs]

I followed the manual installation steps. When attempting to launch the Kotlin QTConsole via the button in the code browser, a NullPointerException with the following stack trace is shown:

Cannot invoke "java.io.File.toPath()" because the return value of "java.io.File.getParentFile()" is null
java.lang.NullPointerException: Cannot invoke "java.io.File.toPath()" because the return value of "java.io.File.getParentFile()" is null
	at GhidraJupyterKotlin.ConnectionFile.writeConfigFile(ConnectionFile.java:96)
	at GhidraJupyterKotlin.ConnectionFile.create(ConnectionFile.java:20)
	at GhidraJupyterKotlin.JupyterKotlinPlugin$1.actionPerformed(JupyterKotlinPlugin.java:87)
	at docking.DockingActionProxy.actionPerformed(DockingActionProxy.java:47)
	at docking.DockingActionPerformer.lambda$perform$0(DockingActionPerformer.java:73)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

---------------------------------------------------
Build Date: 2024-Nov-05 1643 EST
Ghidra Version: 11.2.1
Java Home: C:\Program Files\OpenJDK\jdk-22.0.2
JVM Version: Oracle Corporation 22.0.2
OS: Windows 10 10.0 amd64
Workstation: [REDACTED]

This luckily includes my OS and Ghidra version info. Cheers!

[jhhcs]

PS: I used release v1.6.13.

[fmagin]

This specific problem happens when the plugin fails at running the jupyter --runtime-dir command, because jupyter isn't in the PATH that Ghidra uses when spawning subprocesses. This happens when jupyter is only installed in a virtualenv and Ghidra wasn't started from within that virtualenv.

The new v1.6.14 release has somewhat clearer errors for this, but the correct fix in the future will be that the user can configure the virtual env for the jupyter tooling from within the UI