Switch to yauzl for variant analysis results

extensions/ql-vscode/src/common/unzip.ts

@@ -1,5 +1,8 @@
 import { Entry as ZipEntry, open, Options as ZipOptions, ZipFile } from "yauzl";
 import { Readable } from "stream";
+import { dirname, join } from "path";
+import { WriteStream } from "fs";
+import { createWriteStream, ensureDir } from "fs-extra";
 
 // We can't use promisify because it picks up the wrong overload.
 export function openZip(
@@ -82,3 +85,63 @@ export async function openZipBuffer(
     });
   });
 }
+
+async function copyStream(
+  readable: Readable,
+  writeStream: WriteStream,
+): Promise<void> {
+  return new Promise((resolve, reject) => {
+    readable.on("error", (err) => {
+      reject(err);
+    });
+    readable.on("end", () => {
+      resolve();
+    });
+
+    readable.pipe(writeStream);
+  });
+}
+
+export async function unzipToDirectory(
+  archivePath: string,
+  destinationPath: string,
+): Promise<void> {
+  const zipFile = await openZip(archivePath, {
+    autoClose: false,
+    strictFileNames: true,
+    lazyEntries: true,
+  });
+
+  try {
+    const entries = await readZipEntries(zipFile);
+
+    for (const entry of entries) {
+      const path = join(destinationPath, entry.fileName);
+
+      if (/\/$/.test(entry.fileName)) {
+        // Directory file names end with '/'
+
+        await ensureDir(path);
+      } else {
+        // Ensure the directory exists
+        await ensureDir(dirname(path));
+
+        const readable = await openZipReadStream(zipFile, entry);
+
+        let mode: number | undefined = entry.externalFileAttributes >>> 16;
+        if (mode <= 0) {
+          mode = undefined;
+        }
+
+        const writeStream = createWriteStream(path, {
+          autoClose: true,
+          mode,
+        });
+
+        await copyStream(readable, writeStream);
+      }
+    }
+  } finally {
+    zipFile.close();
+  }
+}

extensions/ql-vscode/src/variant-analysis/variant-analysis-results-manager.ts

@@ -16,7 +16,7 @@ import {
 } from "./shared/variant-analysis";
 import { DisposableObject, DisposeHandler } from "../common/disposable-object";
 import { EventEmitter } from "vscode";
-import { unzipFile } from "../common/zip";
+import { unzipToDirectory } from "../common/unzip";
 import { readRepoTask, writeRepoTask } from "./repo-tasks-store";
 
 type CacheKey = `${number}/${string}`;
@@ -106,7 +106,7 @@ export class VariantAnalysisResultsManager extends DisposableObject {
       VariantAnalysisResultsManager.RESULTS_DIRECTORY,
     );
 
-    await unzipFile(zipFilePath, unzippedFilesDirectory);
+    await unzipToDirectory(zipFilePath, unzippedFilesDirectory);
 
     this._onResultDownloaded.fire({
       variantAnalysisId,

extensions/ql-vscode/test/vscode-tests/activated-extension/variant-analysis/variant-analysis-results-manager.test.ts

@@ -54,8 +54,8 @@ describe(VariantAnalysisResultsManager.name, () => {
     });
 
     afterEach(async () => {
-      if (fs.existsSync(variantAnalysisStoragePath)) {
-        fs.rmSync(variantAnalysisStoragePath, { recursive: true });
+      if (await fs.pathExists(variantAnalysisStoragePath)) {
+        await fs.remove(variantAnalysisStoragePath);
       }
     });