1 files changed, 57 insertions, 0 deletions
diff --git a/receivepack/advertise.go b/receivepack/advertise.go
new file mode 100644
index 00000000..64fb2fe7
--- /dev/null
+++ b/receivepack/advertise.go
@@ -0,0 +1,57 @@
+package receivepack
+
+import (
+	"errors"
+
+	common "codeberg.org/lindenii/furgit/protocol/v0v1/server"
+	"codeberg.org/lindenii/furgit/ref"
+	"codeberg.org/lindenii/furgit/refstore"
+)
+
+func advertisedRefs(opts Options) ([]common.AdvertisedRef, error) {
+	listed, err := opts.Refs.List("")
+	if err != nil {
+		return nil, err
+	}
+
+	return buildAdvertisedRefs(opts, listed)
+}
+
+func buildAdvertisedRefs(opts Options, listed []ref.Ref) ([]common.AdvertisedRef, error) {
+	refs := make([]common.AdvertisedRef, 0, len(listed))
+	for _, entry := range listed {
+		switch resolved := entry.(type) {
+		case ref.Detached:
+			advertised := common.AdvertisedRef{
+				Name: resolved.Name(),
+				ID:   resolved.ID,
+			}
+
+			if resolved.Peeled != nil {
+				advertised.Peeled = resolved.Peeled
+			}
+
+			refs = append(refs, advertised)
+		case ref.Symbolic:
+			if resolved.Name() != "HEAD" {
+				continue
+			}
+
+			head, err := opts.Refs.ResolveFully("HEAD")
+			if err != nil {
+				if errors.Is(err, refstore.ErrReferenceNotFound) {
+					continue
+				}
+
+				return nil, err
+			}
+
+			refs = append(refs, common.AdvertisedRef{
+				Name: "HEAD",
+				ID:   head.ID,
+			})
+		}
+	}
+
+	return refs, nil
+}