Prevent upload (overwrite) of lfs locked file (#8769)

* Check if file is locked on upload file commit.

* Better user message if file is locked.

* Check lfs lock before creating temporary repository. fix some errors.

* move lines

* Add comment that enabled setting is checked.

1 files changed, 17 insertions, 0 deletions

diff --git a/models/error.go b/models/error.go
index 995617e83b..505df28868 100644
--- a/models/error.go
+++ b/models/error.go
@@ -647,6 +647,23 @@ func (err ErrLFSLockAlreadyExist) Error() string {
 	return fmt.Sprintf("lfs lock already exists [rid: %d, path: %s]", err.RepoID, err.Path)
 }
 
+// ErrLFSFileLocked represents a "LFSFileLocked" kind of error.
+type ErrLFSFileLocked struct {
+	RepoID   int64
+	Path     string
+	UserName string
+}
+
+// IsErrLFSFileLocked checks if an error is a ErrLFSFileLocked.
+func IsErrLFSFileLocked(err error) bool {
+	_, ok := err.(ErrLFSFileLocked)
+	return ok
+}
+
+func (err ErrLFSFileLocked) Error() string {
+	return fmt.Sprintf("File is lfs locked [repo: %d, locked by: %s, path: %s]", err.RepoID, err.UserName, err.Path)
+}
+
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