chore(ds): Support platform profile

apps/emqx_ds_backends/rebar.config.script

@@ -2,6 +2,8 @@
 Profile = case os:getenv("PROFILE") of
             "emqx-enterprise" ++ _ ->
               ee;
+            "emqx-platform" ++ _ ->
+              platform;
             false ->
               io:format(user, "WARN: environment variable PROFILE is not set, using 'emqx-enterprise'~n", []),
               ee;
@@ -18,9 +20,15 @@ EEDeps =
     [
         {emqx_ds_builtin_raft, {path, "../emqx_ds_builtin_raft"}}
     ],
+PlatformDeps =
+    [
+        {emqx_fdb_ds, {path, "../emqx_fdb_ds"}}
+    ],
 case Profile of
   ee ->
     [{deps, CEDeps ++ EEDeps}];
+  platform ->
+    [{deps, CEDeps ++ EEDeps ++ PlatformDeps}];
   ce ->
     [{deps, CEDeps}]
 end.

apps/emqx_ds_backends/src/emqx_ds_backends.app.src.script

@@ -2,6 +2,8 @@
 Profile = case os:getenv("PROFILE") of
             "emqx-enterprise" ++ _ ->
               ee;
+            "emqx-platform" ++ _ ->
+              platform;
             false ->
               io:format(user, "WARN: environment variable PROFILE is not set, using 'emqx-enterprise'~n", []),
               ee;
@@ -9,18 +11,23 @@ Profile = case os:getenv("PROFILE") of
               ce
           end,
 
+Backends = case Profile of
+             ce ->
+               [emqx_ds_builtin_local];
+             ee ->
+               [emqx_ds_builtin_local, emqx_ds_builtin_raft];
+             platform ->
+               [emqx_ds_builtin_local, emqx_ds_builtin_raft, emqx_fdb_ds]
+           end,
+
+io:format(user, "DS backends available for this release (~p): ~p~n", [Profile, Backends]),
+
 {application, emqx_ds_backends, [
     {description, "A placeholder application that depends on all available DS backends"},
     % strict semver, bump manually!
     {vsn, "0.1.0"},
     {modules, []},
     {registered, []},
-    {applications, [kernel, stdlib, emqx_durable_storage, emqx_ds_builtin_local |
-                    case Profile of
-                      ee ->
-                          [emqx_ds_builtin_raft];
-                      ce ->
-                          []
-                    end]},
+    {applications, [kernel, stdlib, emqx_durable_storage | Backends]},
     {env, []}
 ]}.