fix: fix trim concurrent panic

Author: li-jin-gou

tool/trimmer/trim/mark.go

@@ -222,14 +222,12 @@ func (t *Trimmer) cleanServiceExtends() {
 	}
 }
 
-var keptPartCache = make(map[*parser.Thrift]bool, 200)
-
 func (t *Trimmer) markKeptPart(ast *parser.Thrift, filename string) (ret bool) {
-	if kept, ok := keptPartCache[ast]; ok {
+	if kept, ok := t.keptPartCache[ast]; ok {
 		return kept
 	}
 	defer func() {
-		keptPartCache[ast] = ret
+		t.keptPartCache[ast] = ret
 	}()
 
 	for _, constant := range ast.Constants {

tool/trimmer/trim/trimmer.go

@@ -49,6 +49,7 @@ type Trimmer struct {
 	PreservedFiles         []string
 	preserveFileStructs    map[*parser.StructLike]struct{}
 	preserveCache          map[*parser.StructLike]bool
+	keptPartCache          map[*parser.Thrift]bool
 }
 
 type TrimASTArg struct {
@@ -257,6 +258,7 @@ func newTrimmer(files []string, outDir string) (*Trimmer, error) {
 	pattern := `(?m)^[\s]*(\/\/|#)[\s]*@preserve[\s]*$`
 	trimmer.preserveRegex = regexp.MustCompile(pattern)
 	trimmer.preserveCache = make(map[*parser.StructLike]bool, 200)
+	trimmer.keptPartCache = make(map[*parser.Thrift]bool, 200)
 	return trimmer, nil
 }