Merge #3115

3115: vscode: remove chmod in favour of an option to createWriteStream() r=matklad a=Veetaha

Inspired by [cpptools code](https://github.com/microsoft/vscode-cpptools/blob/0d91db0e060b946939ee620130c1dbc0fb1d7c42/Extension/src/packageManager.ts#L385-L386)

Co-authored-by: Veetaha <[email protected]>

Author: bors[bot]

editors/code/src/installation/download_file.ts

@@ -3,14 +3,15 @@ import * as fs from "fs";
 import { strict as assert } from "assert";
 
 /**
- * Downloads file from `url` and stores it at `destFilePath`.
+ * Downloads file from `url` and stores it at `destFilePath` with `destFilePermissions`.
  * `onProgress` callback is called on recieveing each chunk of bytes
  * to track the progress of downloading, it gets the already read and total
  * amount of bytes to read as its parameters.
  */
 export async function downloadFile(
     url: string,
     destFilePath: fs.PathLike,
+    destFilePermissions: number,
     onProgress: (readBytes: number, totalBytes: number) => void
 ): Promise<void> {
     const res = await fetch(url);
@@ -35,6 +36,9 @@ export async function downloadFile(
             onProgress(readBytes, totalBytes);
         })
         .on("error", reject)
-        .pipe(fs.createWriteStream(destFilePath).on("close", resolve))
+        .pipe(fs
+            .createWriteStream(destFilePath, { mode: destFilePermissions })
+            .on("close", resolve)
+        )
     );
 }

editors/code/src/installation/language_server.ts

@@ -35,7 +35,8 @@ export async function downloadLatestLanguageServer(
         },
         async (progress, _cancellationToken) => {
             let lastPrecentage = 0;
-            await downloadFile(downloadUrl, installationPath, throttle(
+            const filePermissions = 0o755; // (rwx, r_x, r_x)
+            await downloadFile(downloadUrl, installationPath, filePermissions, throttle(
                 200,
                 /* noTrailing: */ true,
                 (readBytes, totalBytes) => {
@@ -51,8 +52,6 @@ export async function downloadLatestLanguageServer(
         }
     );
     console.timeEnd("Downloading ra_lsp_server");
-
-    await fs.chmod(installationPath, 0o755); // Set (rwx, r_x, r_x) permissions
 }
 export async function ensureLanguageServerBinary(
     langServerSource: null | BinarySource