refstore: Improve interfaces, errors, and make batch work v0.1.92

1 files changed, 48 insertions, 0 deletions

diff --git a/refstore/files/update_prepare.go b/refstore/files/update_prepare.go
new file mode 100644
index 00000000..035c0bc2
--- /dev/null
+++ b/refstore/files/update_prepare.go
@@ -0,0 +1,48 @@
+package files
+
+func (executor *refUpdateExecutor) prepareUpdates(ops []queuedUpdate) (prepared []preparedUpdate, err error) {
+	defer func() {
+		if err != nil {
+			_ = executor.cleanupPreparedUpdates(prepared)
+		}
+	}()
+
+	prepared, err = executor.resolvePreparedUpdates(ops)
+	if err != nil {
+		return prepared, err
+	}
+
+	deleted, written := collectPreparedWrites(prepared)
+
+	existing, err := executor.collectVisibleNames()
+	if err != nil {
+		return prepared, err
+	}
+
+	for _, name := range written {
+		err = verifyRefnameAvailable(name, existing, written, deleted)
+		if err != nil {
+			return prepared, err
+		}
+	}
+
+	err = executor.prepareUpdateLocks(prepared)
+	if err != nil {
+		return prepared, err
+	}
+
+	hasDeletes := len(deleted) > 0
+	if hasDeletes {
+		err = executor.createPackedRefsLock(executor.store.packedRefsTimeout)
+		if err != nil {
+			return prepared, err
+		}
+	}
+
+	err = executor.verifyPreparedUpdates(prepared)
+	if err != nil {
+		return prepared, err
+	}
+
+	return prepared, nil
+}