use fi.Mode().IsRegular()

.gitignore

@@ -1 +1,2 @@
 rcpr
+dist/

rcpr.go

@@ -411,6 +411,9 @@ func detectVersionFile(root string, ver *semv) (string, error) {
 	}
 
 	errorCb := func(fpath string, err error) error {
+		// When running a rcpr binary under the repository root, "text file busy" occurred,
+		// so I did error handling as this, but it did not solve the problem, and it is a special case,
+		// so we may not need to do the check in particular.
 		if os.IsPermission(err) || errors.Is(err, syscall.ETXTBSY) {
 			return nil
 		}
@@ -420,12 +423,13 @@ func detectVersionFile(root string, ver *semv) (string, error) {
 	fl := &fileList{}
 	if err := walker.Walk(root, func(fpath string, fi os.FileInfo) error {
 		if fi.IsDir() {
+			// The "testdata" directory is ommited because of the test code for rcpr itself
 			if fi.Name() == ".git" || fi.Name() == "testdata" {
 				return filepath.SkipDir
 			}
 			return nil
 		}
-		if fi.Mode()&os.ModeSymlink != 0 {
+		if !fi.Mode().IsRegular() {
 			return nil
 		}
 		joinedPath := filepath.Join(root, fpath)

rcpr_test.go

@@ -5,12 +5,14 @@ import (
 )
 
 func TestDetectVersionFile(t *testing.T) {
-	v, _ := newSemver("0.0.0")
+	v, _ := newSemver(version)
 	f, err := detectVersionFile(".", v)
 	if err != nil {
 		t.Error(err)
 	}
-	t.Log(f)
+	if f != "version.go" {
+		t.Errorf("error")
+	}
 }
 
 func TestRetrieveVersionFile(t *testing.T) {