fix: Perform filepath.Clean first and then filepath.ToSlash for skipFile/skipDirs settings (#3144)

Author: sedu

pkg/fanal/walker/walk.go

@@ -27,13 +27,13 @@ type walker struct {
 func newWalker(skipFiles, skipDirs []string) walker {
 	var cleanSkipFiles, cleanSkipDirs []string
 	for _, skipFile := range skipFiles {
-		skipFile = filepath.Clean(filepath.ToSlash(skipFile))
+		skipFile = filepath.ToSlash(filepath.Clean(skipFile))
 		skipFile = strings.TrimLeft(skipFile, "/")
 		cleanSkipFiles = append(cleanSkipFiles, skipFile)
 	}
 
 	for _, skipDir := range append(skipDirs, SystemDirs...) {
-		skipDir = filepath.Clean(filepath.ToSlash(skipDir))
+		skipDir = filepath.ToSlash(filepath.Clean(skipDir))
 		skipDir = strings.TrimLeft(skipDir, "/")
 		cleanSkipDirs = append(cleanSkipDirs, skipDir)
 	}