refactor: raw spawn to instead of helper.spawn in start nondaemon mode

Author: XadillaX

lib/cmd/start.js

@@ -161,8 +161,27 @@ class StartCommand extends Command {
       // check start status
       yield this.checkStatus(argv);
     } else {
-      // signal event had been handler at common-bin helper
-      this.helper.spawn('node', eggArgs, options);
+      options.stdio = options.stdio || 'inherit';
+      this.logger.debug('Run spawn `node %s`', eggArgs.join(' '));
+      const child = this.child = spawn('node', eggArgs, options);
+      child.once('exit', code => {
+        if (code !== 0) {
+          child.emit('error', new Error(`spawn node ${eggArgs.join(' ')} fail, exit code: ${code}`));
+        }
+      });
+
+      // attach master signal to child
+      let signal;
+      [ 'SIGINT', 'SIGQUIT', 'SIGTERM' ].forEach(event => {
+        process.once(event, () => {
+          signal = event;
+          process.exit(0);
+        });
+      });
+      process.once('exit', () => {
+        this.logger.debug('Kill child %s with %s', child.pid, signal);
+        child.kill(signal);
+      });
     }
   }