diff --git a/bin/expressions/src/evaluator.dart b/bin/expressions/src/evaluator.dart
index 99ec34d..f38b7b8 100644
--- a/bin/expressions/src/evaluator.dart
+++ b/bin/expressions/src/evaluator.dart
@@ -122,6 +122,10 @@ class ExpressionEvaluator {
         return left / right();
       case '%':
         return left % right();
+      case 'in':
+        return (right() as List).contains(left);
+      case 'notIn':
+        return !(right() as List).contains(left);
     }
     throw ArgumentError(
         'Unknown operator ${expression.operator} in expression');
diff --git a/bin/expressions/src/parser.dart b/bin/expressions/src/parser.dart
index decdfb1..51c1109 100644
--- a/bin/expressions/src/parser.dart
+++ b/bin/expressions/src/parser.dart
@@ -123,7 +123,9 @@ class ExpressionParser {
     '-': 9,
     '*': 10,
     '/': 10,
-    '%': 10
+    '%': 10,
+    'in': 11,
+    'notIn': 11,
   };
 
   // This function is responsible for gobbling an individual expression,
diff --git a/bin/pre_script.dart b/bin/pre_script.dart
index bbf0029..385133d 100644
--- a/bin/pre_script.dart
+++ b/bin/pre_script.dart
@@ -2,6 +2,19 @@ import 'dart:io';
 import 'parse_arguments.dart';
 import 'expressions/expressions.dart';
 
+const FLAVORS = [
+  'test',
+  'tw',
+  'cn',
+];
+
+final _ctx = {
+  'debug': 'debug',
+  'release': 'release',
+  'profile': 'profile',
+  'default': 'default',
+};
+
 String? exp;
 late String mode;
 late String flavor;
@@ -19,6 +32,13 @@ void main(List<String> arguments) {
   mode = args.mode;
   flavor = args.flavor;
 
+  _ctx.addEntries(FLAVORS.map((e) => MapEntry(e, e)));
+
+  _ctx.addAll({
+    'mode': mode,
+    'flavor': flavor,
+  });
+
   var rootDir = Directory('./');
   rootDir.listSync().forEach(walkPath);
 }
@@ -67,8 +87,7 @@ void walkPath(FileSystemEntity path) {
             state = STATE.none;
             tmp.clear();
           } else {
-            if (evaluator.eval(
-                Expression.parse(exp!), {'mode': mode, 'flavor': flavor})) {
+            if (evaluator.eval(Expression.parse(exp!), _ctx)) {
               // 匹配到
               tmp.clear();
               state = STATE.caching;
@@ -90,7 +109,6 @@ void walkPath(FileSystemEntity path) {
       if (modified) {
         file!.renameSync(path.path + '.bak');
         File(path.path).writeAsStringSync(sb.toString(), flush: true);
-        print(sb.toString());
       }
     } catch (e) {
       if (!(e is FileSystemException)) {
diff --git a/flutter.sh b/flutter.sh
index a97a938..9622c4f 100644
--- a/flutter.sh
+++ b/flutter.sh
@@ -6,6 +6,12 @@ SCRIPT_DIR=$(dirname "$SCRIPT_ABS")
 # shellcheck disable=SC2005
 DART_EXE=$(command -v dart)
 
+JUST_REPLACE=0
+for i in "$@"
+do
+   [ "$i" == "--replace" ] && JUST_REPLACE=1
+done
+
 if [[ ! -x "$DART_EXE" ]]; then
   echo "Can't find dart executable file !"
   return 1
@@ -30,23 +36,26 @@ fi
 
 ${DART_EXE} "$SCRIPT_DIR"/bin/pre_script.dart "$@"
 
-flutter "$@"
+if [[ "$JUST_REPLACE" == 0 ]]; then
 
-${DART_EXE} "$SCRIPT_DIR"/bin/after_script.dart "$@"
+  flutter "$@"
 
-if [[ -f "./.hooks/after_script.dart" ]]; then
-  ${DART_EXE} ./.hooks/after_script.dart "$@"
-fi
+  ${DART_EXE} "$SCRIPT_DIR"/bin/after_script.dart "$@"
 
-if [[ -f "./after_script.dart" ]]; then
-  ${DART_EXE} ./after_script.dart "$@"
-fi
+  if [[ -f "./.hooks/after_script.dart" ]]; then
+    ${DART_EXE} ./.hooks/after_script.dart "$@"
+  fi
 
-if [[ -f "./.hooks/after_script.sh" ]]; then
-  ./.hooks/after_script.sh "$@"
-fi
+  if [[ -f "./after_script.dart" ]]; then
+    ${DART_EXE} ./after_script.dart "$@"
+  fi
 
-if [[ -f "./after_script.sh" ]]; then
-  ./after_script.sh "$@"
-fi
+  if [[ -f "./.hooks/after_script.sh" ]]; then
+    ./.hooks/after_script.sh "$@"
+  fi
+
+  if [[ -f "./after_script.sh" ]]; then
+    ./after_script.sh "$@"
+  fi
 
+fi