object/fetch: Add error wrapper

1 files changed, 19 insertions, 0 deletions

diff --git a/object/fetch/errors.go b/object/fetch/errors.go
new file mode 100644
index 00000000..84a21bbb
--- /dev/null
+++ b/object/fetch/errors.go
@@ -0,0 +1,19 @@
+package fetch
+
+import (
+	"errors"
+
+	"lindenii.org/go/furgit/errs"
+	"lindenii.org/go/furgit/object/id"
+	"lindenii.org/go/furgit/object/store"
+)
+
+// wrapObjectReadError maps raw object-store lookup failures to fetcher-level
+// object lookup errors.
+func wrapObjectReadError(id id.ObjectID, err error) error {
+	if errors.Is(err, store.ErrObjectNotFound) {
+		return &errs.ObjectMissingError{OID: id}
+	}
+
+	return err
+}