better logging (fixes #100)

src/lib/Util.js

@@ -52,9 +52,16 @@ module.exports = class Util {
     };
   }
 
-  static async exec(cmd) {
+  static async exec(cmd, {
+    log = true,
+  } = {}) {
+    if (typeof log === 'string') {
+      // eslint-disable-next-line no-console
+      console.log(`$ ${log}`);
+    } else if (log === true) {
       // eslint-disable-next-line no-console
       console.log(`$ ${cmd}`);
+    }
 
     if (process.platform !== 'linux') {
       return '';

src/lib/WireGuard.js

@@ -37,7 +37,9 @@ module.exports = class WireGuard {
           debug('Configuration loaded.');
         } catch (err) {
           const privateKey = await Util.exec('wg genkey');
-          const publicKey = await Util.exec(`echo ${privateKey} | wg pubkey`);
+          const publicKey = await Util.exec(`echo ${privateKey} | wg pubkey`, {
+            log: `echo ***hidden*** | wg pubkey`
+          });
           const address = WG_DEFAULT_ADDRESS.replace('x', '1');
 
           config = {
@@ -127,7 +129,9 @@ AllowedIPs = ${client.address}/32`;
     }));
 
     // Loop WireGuard status
-    const dump = await Util.exec('wg show wg0 dump');
+    const dump = await Util.exec('wg show wg0 dump', {
+      log: false,
+    });
     dump
       .trim()
       .split('\n')