RepoAssignment ensure to close before overwrite (#19449) (#19460)

* check if GitRepo already open and close if

* Only run RepoAssignment once

Author: 6543

Diff for: modules/context/repo.go

@@ -410,6 +410,12 @@ func RepoIDAssignment() func(ctx *Context) {
 
 // RepoAssignment returns a middleware to handle repository assignment
 func RepoAssignment(ctx *Context) (cancel context.CancelFunc) {
+	if _, repoAssignmentOnce := ctx.Data["repoAssignmentExecuted"]; repoAssignmentOnce {
+		log.Trace("RepoAssignment was exec already, skipping second call ...")
+		return
+	}
+	ctx.Data["repoAssignmentExecuted"] = true
+
 	var (
 		owner *user_model.User
 		err   error
@@ -592,6 +598,9 @@ func RepoAssignment(ctx *Context) (cancel context.CancelFunc) {
 		ctx.ServerError("RepoAssignment Invalid repo "+repo_model.RepoPath(userName, repoName), err)
 		return
 	}
+	if ctx.Repo.GitRepo != nil {
+		ctx.Repo.GitRepo.Close()
+	}
 	ctx.Repo.GitRepo = gitRepo
 
 	// We opened it, we should close it