Renamed to kobalt-core-plugin.xml to avoid shadowing.

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/KobaltPluginXml.kt

@@ -78,7 +78,12 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
     val mavenIdInterceptors = arrayListOf<IMavenIdInterceptor>()
 
     companion object {
-        val PLUGIN_XML = "META-INF/kobalt-plugin.xml" // Plugins.PLUGIN_XML)
+        /**
+         * The name needs to be different from kobalt-plugin.xml because classloaders
+         * can put a plug-in's jar file in front of Kobalt's, which means we'll read
+         * that one instead of the core one.
+         */
+        val PLUGIN_XML = "META-INF/kobalt-core-plugin.xml" // Plugins.PLUGIN_XML)
 
         /**
          * Read Kobalt's own kobalt-plugin.xml.
@@ -86,6 +91,7 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
         fun readKobaltPluginXml(): PluginInfo {
             // Note: use forward slash here since we're looking up this file in a .jar file
             val url = Kobalt::class.java.classLoader.getResource(PLUGIN_XML)
+            log(2, "URL for core kobalt-plugin.xml: $url")
             if (url != null) {
                 return readPluginXml(url.openConnection().inputStream)
             } else {
@@ -100,6 +106,7 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
             val jaxbContext = JAXBContext.newInstance(KobaltPluginXml::class.java)
             val kotlinPlugin: KobaltPluginXml = jaxbContext.createUnmarshaller().unmarshal(ins)
                     as KobaltPluginXml
+            log(2, "Parsed plugin-info.xml, found: " + kotlinPlugin.name)
             return PluginInfo(kotlinPlugin, classLoader)
         }