configuration: emmylua.java.home

Author: tangzx

package.json

@@ -46,7 +46,13 @@
         ],
         "configuration": {
             "title": "EmmyLua",
-            "properties": {}
+            "properties": {
+                "emmylua.java.home": {
+                    "type":["string", "null"],
+                    "default": null,
+                    "description": "Specifies the path to the java home"
+                }
+            }
         },
         "configurationDefaults": {
             "[EmmyLua]": {

src/extension.ts

@@ -7,18 +7,22 @@ import * as net from "net";
 import { LanguageClient, LanguageClientOptions, ServerOptions, StreamInfo } from "vscode-languageclient";
 import * as Annotator from "./annotator";
 import * as notifications from "./notifications";
+import findJava from "./findJava";
 
 var savedContext: vscode.ExtensionContext;
 var client: LanguageClient;
 var activeEditor: vscode.TextEditor;
 var progressBar: vscode.StatusBarItem;
+var javaExecutablePath: string;
 
 export function activate(context: vscode.ExtensionContext) {
     console.log("emmy lua actived!");
     savedContext = context;
     progressBar = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left);
     startClient();
 
+    vscode.workspace.onDidChangeConfiguration(onDidChangeConfiguration);
+
     vscode.window.onDidChangeActiveTextEditor(editor => {
         activeEditor = editor as vscode.TextEditor;
     }, null, savedContext.subscriptions);
@@ -37,6 +41,13 @@ export function deactivate() {
     stopServer();
 }
 
+function onDidChangeConfiguration(event: vscode.ConfigurationChangeEvent) {
+    let newJavaExecutablePath = findJava();
+    if (newJavaExecutablePath !== javaExecutablePath) {
+        console.log(newJavaExecutablePath);
+    }
+}
+
 function startClient() {
     let clientOptions: LanguageClientOptions = {
         documentSelector: [ { scheme: 'file', language: 'EmmyLua' } ],

src/findJava.ts

@@ -0,0 +1,41 @@
+import * as path from "path";
+import * as vscode from "vscode";
+
+function validateJava(javaPath: string): boolean {
+    return true;
+}
+
+export default function(): string|null {
+	var executableFile: string = "java";
+	if(process["platform"] === "win32") {
+		executableFile += ".exe";
+    }
+    
+    var settingsPath = vscode.workspace.getConfiguration("emmylua").get("java.home");
+    if (settingsPath) {
+        let javaPath = path.join(<string>settingsPath, "bin", executableFile);
+        if (validateJava(javaPath)) {
+            return javaPath;
+        }
+    }
+
+	if("JAVA_HOME" in process.env) {
+		let javaHome = <string> process.env.JAVA_HOME;
+        let javaPath = path.join(javaHome, "bin", executableFile);
+        return javaPath;
+	}
+
+	if("PATH" in process.env) {
+		let PATH = <string> process.env.PATH;
+		let paths = PATH.split(path.delimiter);
+		let pathCount = paths.length;
+		for(let i = 0; i < pathCount; i++) {
+			let javaPath = path.join(paths[i], executableFile);
+			if(validateJava(javaPath)) {
+				return javaPath;
+			}
+		}
+	}
+     
+	return null;
+}