Perfect the codebase for wamr-ide (#1817)

Fix errors and warnings reported by eslint
Add CONTRIBUTING document for vscode-extension

test-tools/wamr-ide/VSCode-Extension/src/utilities/directoryUtilities.ts

@@ -31,7 +31,7 @@ export function createDirectory(
             return false;
         }
 
-        let parent = path.dirname(dest);
+        const parent = path.dirname(dest);
         if (!createDirectory(parent, mode)) {
             return false;
         }
@@ -44,6 +44,7 @@ export function createDirectory(
     }
 }
 
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function copyFiles(src: string, dest: string, flags?: number): boolean {
     try {
         fileSystem.copyFileSync(src, dest);
@@ -64,7 +65,7 @@ export function writeIntoFile(path: string, data: string): void {
 
 export function readFromFile(path: string): string {
     try {
-        let data = fileSystem.readFileSync(path, { encoding: 'utf-8' });
+        const data = fileSystem.readFileSync(path, { encoding: 'utf-8' });
         return data as string;
     } catch (err) {
         vscode.window.showErrorMessage(err as string);
@@ -114,9 +115,9 @@ export function checkIfFileExists(path: string): boolean {
     return false;
 }
 
-export function checkFolderName(folderName: string) {
+export function checkFolderName(folderName: string): boolean {
     let invalidCharacterArr: string[] = [];
-    var valid = true;
+    let valid = true;
 
     if (folderName.length > 255) {
         valid = false;
@@ -143,6 +144,7 @@ export function downloadFile(
 ): Promise<void> {
     return new Promise((resolve, reject) => {
         const file = fileSystem.createWriteStream(destinationPath);
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
         const stream = request(url, undefined, (error, response, body) => {
             if (response.statusCode !== 200) {
                 reject(

test-tools/wamr-ide/VSCode-Extension/src/utilities/getUri.ts

@@ -9,6 +9,6 @@ export function getUri(
     webview: Webview,
     extensionUri: Uri,
     pathList: string[]
-) {
+): Uri {
     return webview.asWebviewUri(Uri.joinPath(extensionUri, ...pathList));
 }

test-tools/wamr-ide/VSCode-Extension/src/utilities/lldbUtilities.ts

@@ -37,6 +37,7 @@ function getLLDBUnzipFilePath(destinationFolder: string, filename: string) {
 export function getWAMRExtensionVersion(
     context: vscode.ExtensionContext
 ): string {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
     return require(path.join(context.extensionPath, 'package.json')).version;
 }
 
@@ -64,7 +65,9 @@ export function isLLDBInstalled(context: vscode.ExtensionContext): boolean {
     return checkIfFileExists(lldbBinaryPath);
 }
 
-export async function promptInstallLLDB(context: vscode.ExtensionContext) {
+export async function promptInstallLLDB(
+    context: vscode.ExtensionContext
+): Promise<void> {
     const extensionPath = context.extensionPath;
     const setupPrompt = 'setup';
     const skipPrompt = 'skip';
@@ -111,5 +114,7 @@ export async function promptInstallLLDB(context: vscode.ExtensionContext) {
     );
 
     // Remove the bundle.zip
-    fs.unlink(lldbZipPath, () => {});
+    fs.unlink(lldbZipPath, () => {
+        return;
+    });
 }