feat: ability to set custom probe config file

Author: BFergerson

control/src/main/kotlin/spp/probe/ProbeConfiguration.kt

@@ -29,9 +29,11 @@ object ProbeConfiguration {
 
     private var rawProperties: Map<String, Map<String, Any>>? = null
     private var localProperties: JsonObject? = null
+    var customProbeFile: String? = null
 
-    init {
+    fun load() {
         var localFile = File("spp-probe.yml")
+        customProbeFile?.let { localFile = File(it) }
         try {
             //working directory?
             val mapper = ObjectMapper(YAMLFactory())

control/src/main/kotlin/spp/probe/SourceProbe.kt

@@ -111,6 +111,9 @@ object SourceProbe {
 
     @JvmStatic
     fun premain(args: String?, inst: Instrumentation) {
+        ProbeConfiguration.customProbeFile = args
+        ProbeConfiguration.load()
+        if (ProbeConfiguration.isNotQuite) println("SourceProbe initiated via premain. args: $args")
         if (isAgentInitialized) {
             if (ProbeConfiguration.isNotQuite) println("SourceProbe is already initialized")
             return