errs: Add

1 files changed, 25 insertions, 0 deletions

diff --git a/errs/missing.go b/errs/missing.go
new file mode 100644
index 00000000..0630846c
--- /dev/null
+++ b/errs/missing.go
@@ -0,0 +1,25 @@
+package errs
+
+import (
+	"fmt"
+
+	"lindenii.org/go/furgit/object/id"
+)
+
+// ObjectMissingError indicates that
+// a referenced object is absent from the repository object store.
+//
+// This should only be used
+// in situations where objects are being queried recursively
+// or otherwise by some chain that the caller may not be aware of.
+//
+// Failures on direct object access
+// should instead use [lindenii.org/go/furgit/object/store.ErrObjectNotFound].
+type ObjectMissingError struct {
+	OID id.ObjectID
+}
+
+// Error implements error.
+func (e *ObjectMissingError) Error() string {
+	return fmt.Sprintf("missing object %s", e.OID)
+}