fix: ref handling

rebar.config

@@ -5,12 +5,14 @@
 
 {deps, [
     {elli, {git, "[email protected]:elli-lib/elli.git", {branch, "main"}}},
-    {ndto, {git, "[email protected]:nomasystems/ndto.git", {branch, "main"}}},
+    {ndto,
+        {git, "[email protected]:nomasystems/ndto.git",
+            {branch, "refactor/split-oas-3-0-json-schema-draft-04-parsers"}}},
     {njson, {git, "[email protected]:nomasystems/njson.git", {branch, "main"}}}
 ]}.
 
 {plugins, [
-    {rebar3_ndto, {git, "[email protected]:nomasystems/rebar3_ndto.git", {branch, "main"}}}
+    {rebar3_ndto, {git, "[email protected]:nomasystems/rebar3_ndto.git", {tag, "0.1.0"}}}
 ]}.
 {ndto, [
     {specs, [
@@ -27,6 +29,9 @@
 
 {project_plugins, [
     {erlfmt, {git, "[email protected]:WhatsApp/erlfmt.git", {branch, "main"}}},
+    {eqwalizer_rebar3,
+        {git_subdir, "https://github.com/whatsapp/eqwalizer.git", {branch, "main"},
+            "eqwalizer_rebar3"}},
     {gradualizer, {git, "[email protected]:josefs/Gradualizer.git", {branch, "master"}}},
     rebar3_ex_doc
 ]}.
@@ -42,6 +47,9 @@
     {test, [
         {erl_opts, [nowarn_export_all]},
         {deps, [
+            {eqwalizer_support,
+                {git_subdir, "https://github.com/whatsapp/eqwalizer.git", {branch, "main"},
+                    "eqwalizer_support"}},
             {meck, {git, "[email protected]:eproxus/meck.git", {branch, "master"}}},
             {nct_util, {git, "[email protected]:nomasystems/nct_util.git", {branch, "main"}}}
         ]}

rebar.lock

@@ -8,9 +8,9 @@
   1},
  {<<"ndto">>,
   {git,"[email protected]:nomasystems/ndto.git",
-       {ref,"491a2441e43afa2fb037c6e7e826c45a383e3bd9"}},
+       {ref,"41043b1c89dccf1485a12b04467949a1c9d161f5"}},
   0},
  {<<"njson">>,
   {git,"[email protected]:nomasystems/njson.git",
-       {ref,"76ab40033ee977f876e7b3addca5de981ff4a9ef"}},
+       {ref,"b230b3e6fb5e35320aeaa203762f3f12277c9970"}},
   0}].

src/erf.erl

@@ -41,7 +41,7 @@
 
 %%% TYPES
 -type api() :: erf_parser:api().
--type body() :: njson:t().
+-type body() :: undefined | njson:t().
 -type conf() :: #{
     spec_path := binary(),
     callback := module(),