Merge pull request #1986 from thelounge/astorije/fix-deleting-package

Make sure existing packages (and themes) are not deleted when installing a new one on Node.js v8

src/command-line/install.js

@@ -41,18 +41,22 @@ program
 			// Create node_modules folder, otherwise npm will start walking upwards to find one
 			fsextra.ensureDirSync(packagesPath);
 
-			// Create package.json with private set to true to avoid npm warnings
+			// Create package.json with private set to true to avoid npm warnings, if
+			// it doesn't exist already
+			if (!fs.existsSync(packagesConfig)) {
 				fs.writeFileSync(packagesConfig, JSON.stringify({
 					private: true,
 					description: "Packages for The Lounge. All packages in node_modules directory will be automatically loaded.",
 				}, null, "\t"));
+			}
 
 			const npm = child.spawn(
 				process.platform === "win32" ? "npm.cmd" : "npm",
 				[
 					"install",
 					"--production",
-					"--no-save",
+					"--save",
+					"--save-exact",
 					"--no-bin-links",
 					"--no-package-lock",
 					"--no-progress",