catch Python SystemExit exception to prevent Ghidra from closing (#30)

data/python/jepeval.py

@@ -64,6 +64,8 @@ def _jepeval(line):
 
     try:
         more_input_needed = _jepeval(line)
+    except SystemExit as err:
+        more_input_needed = False
     except Exception as err:
         # Python exceptions are printed in Python instead of Java to improve error messaging
         # in the Ghidra console window

data/python/jeprunscript.py

@@ -29,6 +29,8 @@ def jep_runscript(path):
 
     try:
         exec(compile(source, path, "exec"), {**globals(), **additional_globals})
+    except SystemExit as err:
+        print(f"Script {path} called exit with code {err.code}")
     except Exception as err:
         # Python exceptions are printed in Python instead of Java to give us better error
         # messages in the Ghidra console window

src/main/java/ghidrathon/GhidrathonPlugin.java

@@ -18,7 +18,7 @@
 import ghidra.framework.plugintool.*;
 import ghidra.util.task.TaskLauncher;
 import ghidra.app.plugin.ProgramPlugin;
-import ghidra.app.ExamplesPluginPackage;
+import ghidra.app.CorePluginPackage;
 import ghidra.util.task.TaskMonitorAdapter;
 import ghidra.framework.options.ToolOptions;
 import ghidra.app.plugin.PluginCategoryNames;
@@ -32,7 +32,7 @@
 //@formatter:off
 @PluginInfo(
 	status = PluginStatus.STABLE,
-	packageName = ExamplesPluginPackage.NAME,
+	packageName = CorePluginPackage.NAME,
 	category = PluginCategoryNames.INTERPRETERS,
 	shortDescription = "Python 3 Interpreter",
 	description = "The FLARE team's open-source Python 3 interpreter console that is tightly integrated with a loaded Ghidra program.",