feat: plugin file as system property

src/main/kotlin/com/vaadin/plugin/copilot/CopilotPluginUtil.kt

@@ -149,5 +149,9 @@ class CopilotPluginUtil {
             LOG.info("Project directory: $projectDir")
             return projectDir.findOrCreateDirectory(IDEA_DIR)
         }
+
+        fun getDotFile(project: Project): VirtualFile? {
+            return getDotFileDirectory(project)?.findFile(DOTFILE)
+        }
     }
 }

src/main/kotlin/com/vaadin/plugin/copilot/DefaultProgramPatcher.kt

@@ -0,0 +1,24 @@
+package com.vaadin.plugin.copilot
+
+import com.intellij.execution.Executor
+import com.intellij.execution.configurations.JavaParameters
+import com.intellij.execution.configurations.RunConfiguration
+import com.intellij.execution.configurations.RunProfile
+import com.intellij.execution.runners.JavaProgramPatcher
+
+class DefaultProgramPatcher : JavaProgramPatcher() {
+
+    override fun patchJavaParameters(executor: Executor?, runProfile: RunProfile?, javaParameters: JavaParameters?) {
+
+        if (javaParameters == null) {
+            return
+        }
+        val paramsList = javaParameters.vmParametersList
+
+        if (runProfile is RunConfiguration) {
+            CopilotPluginUtil.getDotFile(runProfile.project)?.let {
+                paramsList.add("-Dvaadin.copilot.pluginDotFilePath=${it.path}")
+            }
+        }
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -61,6 +61,9 @@
         <actionOnSave id="VaadinCompileOnSaveAction"
                       implementation="com.vaadin.plugin.actions.VaadinCompileOnSaveAction" order="last"/>
 
+        <!-- Default program patcher to inject plugin file location -->
+        <java.programPatcher implementation="com.vaadin.plugin.copilot.DefaultProgramPatcher"/>
+
         <!-- Debug using Hotswap Agent -->
         <programRunner implementation="com.vaadin.plugin.hotswapagent.HotswapAgentRunner"/>
         <java.programPatcher implementation="com.vaadin.plugin.hotswapagent.HotswapAgentProgramPatcher"/>