Add the #oid{} record to differentiate from a formatted hash

src/geef_oid.erl

@@ -1,12 +1,14 @@
 -module(geef_oid).
 
+-include("geef_records.hlr").
 -export([parse/1, fmt/1]).
 
--spec fmt(binary()) -> binary().
+-spec fmt(oid()) -> binary().
-fmt(Oid) ->
+fmt(#oid{oid=Oid}) ->
     geef:oid_fmt(Oid).
 
 
--spec parse(binary()) -> binary().
+-spec parse(binary()) -> oid().
 parse(Sha) ->
-    geef:oid_parse(Sha).
+    Oid = geef:oid_parse(Sha),
+    #oid{oid=Oid}.

src/geef_records.hlr

@@ -1,7 +1,9 @@
 -record(ref, {handle, type :: atom()}).
 -record(repo, {handle}).
 -record(odb, {handle}).
+-record(oid, {oid}).
 
 -type ref() :: #ref{}.
 -type repo() :: #repo{}.
 -type odb() :: #odb{}.
+-type oid() :: #oid{}.

src/geef_ref.erl

@@ -27,6 +27,9 @@ resolve(#ref{handle=Handle}) ->
 	    Other
     end.
 
--spec target(ref()) -> binary().
+-spec target(ref()) -> binary() | oid().
-target(#ref{handle=Handle}) ->
+target(#ref{handle=Handle,type=symbolic}) ->
-    geef:reference_target(Handle).
+    geef:reference_target(Handle);
+target(#ref{handle=Handle,type=oid}) ->
+    Oid = geef:reference_target(Handle),
+    #oid{oid=Oid}.