new: server tab process

lib/data/model/app/shell_func.dart

@@ -0,0 +1,41 @@
+class AppShellFunc {
+  final String name;
+  final String cmd;
+  final String flag;
+
+  const AppShellFunc(this.name, this.cmd, this.flag);
+}
+
+typedef AppShellFuncs = List<AppShellFunc>;
+
+extension AppShellFuncsExt on AppShellFuncs {
+  String get generate {
+    final sb = StringBuffer();
+    // Write each func
+    for (final func in this) {
+      sb.write('''
+${func.name}() {
+${func.cmd}
+}
+
+''');
+    }
+
+    // Write switch case
+    sb.write('case \$1 in\n');
+    for (final func in this) {
+      sb.write('''
+  '-${func.flag}')
+    ${func.name}
+    ;;
+''');
+    }
+    sb.write('''
+  *)
+    echo "Invalid argument \$1"
+    ;;
+esac
+''');
+    return sb.toString();
+  }
+}