GP-4157: Injected "this" object into python script state so users of

askProgram() can release the consumer

Ghidra/Features/Python/ghidra_scripts/AskScriptPy.py

@@ -31,6 +31,7 @@ from ghidra.program.model.listing import Program
 from ghidra.util import Msg
 
 from java.lang import IllegalArgumentException
+from ghidra.util.exception import CancelledException
 
 # The presence of the AskScript.properties file in the same location (as AskScript.java) 
 # allows for the following behavior:
@@ -67,8 +68,12 @@ try:
     #for b in bytes: 
     #   print "b = " + str(b & 0xff)
 			
+    try:
         prog = askProgram("Please choose a program to open.")
         print "Program picked: " + prog.getName()
+    finally:
+        if prog is not None:
+            prog.release(this)
 
     domFile = askDomainFile("Which domain file would you like?")
     print "Domain file: " + domFile.getName()
@@ -102,4 +107,6 @@ try:
 
 except IllegalArgumentException as error:
     Msg.warn(self, "Error during headless processing: " + error.toString())
+except CancelledException:
+    print "Cancelled"
 	

Ghidra/Features/Python/src/main/java/ghidra/python/GhidraPythonInterpreter.java

@@ -338,6 +338,9 @@ public class GhidraPythonInterpreter extends InteractiveInterpreter {
 			return;
 		}
 
+		// Inject 'this'
+		setVariable("this", script);
+
 		// Loop though the script class hierarchy
 		for (Class<?> scriptClass = script.getClass(); scriptClass != Object.class; scriptClass =
 			scriptClass.getSuperclass()) {