Switch to yauzl for CodeQL CLI

This switches the CodeQL CLI download to `yauzl` instead of `unzipper`.
There should be no changes in behavior. I tested this manually on
Insiders by removing the distribution directory and this successfully
downloaded and extracted the CLI.

extensions/ql-vscode/src/codeql-cli/distribution.ts

@@ -15,7 +15,6 @@ import {
 import {
   codeQlLauncherName,
   deprecatedCodeQlLauncherName,
-  extractZipArchive,
   getRequiredAssetName,
 } from "../common/distribution";
 import {
@@ -26,6 +25,7 @@ import {
   showAndLogErrorMessage,
   showAndLogWarningMessage,
 } from "../common/logging";
+import { unzipToDirectory } from "../common/unzip";
 
 /**
  * distribution.ts
@@ -420,7 +420,7 @@ class ExtensionSpecificDistributionManager {
       void extLogger.log(
         `Extracting CodeQL CLI to ${this.getDistributionStoragePath()}`,
       );
-      await extractZipArchive(archivePath, this.getDistributionStoragePath());
+      await unzipToDirectory(archivePath, this.getDistributionStoragePath());
     } finally {
       await remove(tmpDirectory);
     }

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

@@ -1,7 +1,4 @@
 import { platform } from "os";
-import { Open } from "unzipper";
-import { join } from "path";
-import { pathExists, chmod } from "fs-extra";
 
 /**
  * Get the name of the codeql cli installation we prefer to install, based on our current platform.
@@ -19,31 +16,6 @@ export function getRequiredAssetName(): string {
   }
 }
 
-export async function extractZipArchive(
-  archivePath: string,
-  outPath: string,
-): Promise<void> {
-  const archive = await Open.file(archivePath);
-  await archive.extract({
-    concurrency: 4,
-    path: outPath,
-  });
-  // Set file permissions for extracted files
-  await Promise.all(
-    archive.files.map(async (file) => {
-      // Only change file permissions if within outPath (path.join normalises the path)
-      const extractedPath = join(outPath, file.path);
-      if (
-        extractedPath.indexOf(outPath) !== 0 ||
-        !(await pathExists(extractedPath))
-      ) {
-        return Promise.resolve();
-      }
-      return chmod(extractedPath, file.externalFileAttributes >>> 16);
-    }),
-  );
-}
-
 export function codeQlLauncherName(): string {
   return platform() === "win32" ? "codeql.exe" : "codeql";
 }

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/test/vscode-tests/ensureCli.ts

@@ -2,9 +2,9 @@ import { existsSync, createWriteStream, mkdirpSync } from "fs-extra";
 import { normalize, join } from "path";
 import {
   getRequiredAssetName,
-  extractZipArchive,
   codeQlLauncherName,
 } from "../../src/common/distribution";
+import { unzipToDirectory } from "../../src/common/unzip";
 import fetch from "node-fetch";
 import supportedCliVersions from "../../supported_cli_versions.json";
 
@@ -126,7 +126,7 @@ export async function ensureCli(useCli: boolean) {
 
     console.log(`Unzipping into '${unzipDir}'`);
     mkdirpSync(unzipDir);
-    await extractZipArchive(downloadedFilePath, unzipDir);
+    await unzipToDirectory(downloadedFilePath, unzipDir);
     console.log("Done.");
   } catch (e) {
     console.error("Failed to download CLI.");