Add adm-zip and tar as postinstall dependencies

bin/install-kwix.js

@@ -2,9 +2,10 @@ import fs from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
 import https from 'node:https';
-import {execFileSync} from 'node:child_process';
 import {fileURLToPath} from 'node:url';
 import {createWriteStream} from 'node:fs';
+import AdmZip from 'adm-zip';
+import * as tar from 'tar';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
@@ -12,9 +13,8 @@ const VERSION = '3.8.1';
 const BASE_URL = 'https://download.kiwix.org/release/kiwix-tools';
 const PLATFORM_MAP = {linux: 'linux', darwin: 'macos', win32: 'win'};
 
-const BIN_DIR = path.join(__dirname, '..', 'bin'); // project root/bin
+const BIN_DIR = path.join(__dirname, '..', 'bin');
 
-/** Download a file, following redirects. */
 function download(url, dest) {
 	return new Promise((resolve, reject) => {
 		const file = fs.createWriteStream(dest);
@@ -32,7 +32,6 @@ function download(url, dest) {
 	});
 }
 
-/** Recursively chmod all files under a directory. */
 function chmodRecursive(dir, mode) {
 	for (const entry of fs.readdirSync(dir, {withFileTypes: true})) {
 		const full = path.join(dir, entry.name);
@@ -58,28 +57,51 @@ async function downloadAndExtract() {
 
 	console.log('Extracting...');
 
-	// Detect and handle both tar.gz and zip archives
+	// Use npm-installable libraries for extraction
 	if (archiveName.endsWith('.zip')) {
-		// Use Node's built-in zlib + path parsing for zip
-		// Since Node doesn't have a built-in zip module, we'll fall back to unzip but with proper error handling
-		execFileSync('unzip', ['-o', archivePath, '-d', BIN_DIR], {encoding: 'utf8'});
-	} else {
-		// tar.gz - can use tar or Node's fs module directly
-		execFileSync('tar', ['-xf', archivePath, '-C', BIN_DIR], {encoding: 'utf8'});
+		const zip = new AdmZip(archivePath);
+		const zipName = zip.getZipName(); // e.g. "kiwix-tools_linux-x86_64-3.8.1"
+		const extractDir = path.join(BIN_DIR, zipName);
+
+		await zip.extractAllToAsync(extractDir, true);
+
+		// Flatten the extracted directory into BIN_DIR
+		if (fs.existsSync(extractDir)) {
+			for (const entry of await fs.promises.readdir(extractDir)) {
+				const src = path.join(extractDir, entry);
+				const dest = path.join(BIN_DIR, entry);
+				await fs.promises.rename(src, dest);
+			}
+			await fs.promises.rmdir(extractDir);
+		}
+	} else if (archiveName.endsWith('.tar.gz')) {
+		// Extract to a temp dir first to check for subdirectory wrapper
+		const extractDir = path.join(tmpDir, 'extracted');
+		await fs.promises.mkdir(extractDir, {recursive: true});
+
+		await tar.extract({
+			file: archivePath,
+			cwd: extractDir,
+			silent: false
+		});
+
+		const list = await fs.promises.readdir(extractDir, {withFileTypes: true});
+		const wrapper = list.find(e => e.isDirectory() && e.name.startsWith('kiwix-tools_'));
+		const finalDir = wrapper ? path.join(extractDir, wrapper.name) : extractDir;
+
+		// Flatten into BIN_DIR
+		for (const entry of await fs.promises.readdir(finalDir)) {
+			const src = path.join(finalDir, entry);
+			const dest = path.join(BIN_DIR, entry);
+			await fs.promises.rename(src, dest);
 		}
 
-	// Archives (tar.gz) may wrap contents in a subdirectory - flatten it into BIN_DIR
-	const wrapperDir = (await fs.promises.readdir(BIN_DIR, {withFileTypes: true}))
-		.find(e => e.isDirectory() && e.name.startsWith('kiwix-tools_'));
-	if (wrapperDir) {
-		const wrapperPath = path.join(BIN_DIR, wrapperDir.name);
-		for (const entry of await fs.promises.readdir(wrapperPath)) {
-			await fs.promises.rename(path.join(wrapperPath, entry), path.join(BIN_DIR, entry));
-		}
-		await fs.promises.rmdir(wrapperPath);
+		await fs.promises.rmdir(finalDir);
 	}
 
-	if (process.platform !== 'win32') chmodRecursive(BIN_DIR, 0o755);
+	if (process.platform !== 'win32') {
+		chmodRecursive(BIN_DIR, 0o755);
+	}
 
 	await fs.promises.rm(tmpDir, {recursive: true, force: true});
 	console.log('Installed to:', BIN_DIR);

package.json

@@ -17,6 +17,8 @@
 	"dependencies": {
 		"@ztimson/utils": "^0.30.8",
 		"lzma1": "^0.3.0",
-		"zstd-codec": "^0.1.5"
+		"tar": "^7.4.3",
+		"zstd-codec": "^0.1.5",
+		"adm-zip": "^0.5.16"
 	}
 }