1 files changed, 42 insertions, 0 deletions
diff --git a/refstore/files/update_prepare_resolve.go b/refstore/files/update_prepare_resolve.go
new file mode 100644
index 00000000..492f5157
--- /dev/null
+++ b/refstore/files/update_prepare_resolve.go
@@ -0,0 +1,42 @@
+package files
+
+import "codeberg.org/lindenii/furgit/refstore"
+
+func (executor *refUpdateExecutor) resolvePreparedUpdates(ops []queuedUpdate) ([]preparedUpdate, error) {
+	prepared := make([]preparedUpdate, 0, len(ops))
+	targets := make(map[string]struct{}, len(ops))
+
+	for _, op := range ops {
+		target, err := executor.resolveQueuedUpdateTarget(op)
+		if err != nil {
+			return prepared, err
+		}
+
+		targetKey := updateTargetKey(target.loc)
+		if _, exists := targets[targetKey]; exists {
+			return prepared, wrapUpdateError(op.name, &refstore.DuplicateUpdateError{})
+		}
+
+		targets[targetKey] = struct{}{}
+		prepared = append(prepared, preparedUpdate{op: op, target: target})
+	}
+
+	return prepared, nil
+}
+
+func collectPreparedWrites(prepared []preparedUpdate) (deleted map[string]struct{}, written []string) {
+	deleted = make(map[string]struct{})
+	written = make([]string, 0, len(prepared))
+
+	for _, item := range prepared {
+		switch item.op.kind {
+		case updateDelete, updateDeleteSymbolic:
+			deleted[item.target.name] = struct{}{}
+		case updateCreate, updateReplace, updateCreateSymbolic, updateReplaceSymbolic:
+			written = append(written, item.target.name)
+		case updateVerify, updateVerifySymbolic:
+		}
+	}
+
+	return deleted, written
+}