Support profile_string overlay var in releases

THANKS

@@ -143,3 +143,4 @@ Drew Varner
 Niklas Johansson
 Bryan Paxton
 Justin Wood
+Guilherme Andrade

src/rebar_dir.erl

@@ -3,6 +3,7 @@
 
 -export([base_dir/1,
          profile_dir/2,
+         profile_dir_name/1,
          deps_dir/1,
          deps_dir/2,
          root_dir/1,
@@ -39,18 +40,32 @@ base_dir(State) ->
 
 %% @doc returns the directory root for build artifacts for a given set
 %% of profiles.
--spec profile_dir(rebar_dict(), [atom()]) -> file:filename_all().
+-spec profile_dir(rebar_dict(), [atom(), ...]) -> file:filename_all().
 profile_dir(Opts, Profiles) ->
-    {BaseDir, ProfilesStrings} = case [rebar_utils:to_list(P) || P <- Profiles] of
-        ["global" | _] -> {?MODULE:global_cache_dir(Opts), [""]};
-        ["bootstrap", "default"] -> {rebar_opts:get(Opts, base_dir, ?DEFAULT_BASE_DIR), ["default"]};
-        ["default"] -> {rebar_opts:get(Opts, base_dir, ?DEFAULT_BASE_DIR), ["default"]};
-        %% drop `default` from the profile dir if it's implicit and reverse order
+    BasePath =
+        case Profiles of
+            [global | _] -> ?MODULE:global_cache_dir(Opts);
+            [_|_] -> rebar_opts:get(Opts, base_dir, ?DEFAULT_BASE_DIR)
+        end,
+    DirName = profile_dir_name_(Profiles),
+    filename:join(BasePath, DirName).
+
+%% @doc returns the directory name for build artifacts for a given set
+%% of profiles.
+profile_dir_name(State) ->
+    profile_dir_name_(rebar_state:current_profiles(State)).
+
+-spec profile_dir_name_([atom(), ...] | rebar_state:t()) -> file:filename_all().
+profile_dir_name_(Profiles)
+  when is_list(Profiles) ->
+    case [rebar_utils:to_list(P) || P <- Profiles] of
+        ["global" | _] -> "";
+        ["bootstrap", "default"] -> "default";
+        ["default"] -> "default";
+        %% drop `default' from the profile dir if it's implicit and reverse order
         %%  of profiles to match order passed to `as`
-        ["default"|Rest] -> {rebar_opts:get(Opts, base_dir, ?DEFAULT_BASE_DIR), Rest}
-    end,
-    ProfilesDir = rebar_string:join(ProfilesStrings, "+"),
-    filename:join(BaseDir, ProfilesDir).
+        ["default"|NonDefaultNames] -> rebar_string:join(NonDefaultNames, "+")
+    end.
 
 %% @doc returns the directory where dependencies should be placed
 %% given the current profile.

src/rebar_relx.erl

@@ -27,25 +27,31 @@ do(Module, Command, Provider, State) ->
     LibDirs = rebar_utils:filtermap(fun ec_file:exists/1,
                                    [rebar_dir:checkouts_dir(State), DepsDir | ProjectAppDirs]),
     OutputDir = filename:join(rebar_dir:base_dir(State), ?DEFAULT_RELEASE_DIR),
+    ProfileString = rebar_dir:profile_dir_name(State),
     AllOptions = rebar_string:join([Command | Options], " "),
     Cwd = rebar_state:dir(State),
     Providers = rebar_state:providers(State),
     RebarOpts = rebar_state:opts(State),
+    ExtraOverlays = [{profile_string, ProfileString}],
     ErlOpts = rebar_opts:erl_opts(RebarOpts),
     rebar_hooks:run_project_and_app_hooks(Cwd, pre, Provider, Providers, State),
     try
         case rebar_state:get(State, relx, []) of
             [] ->
                 relx:main([{lib_dirs, LibDirs}
                           ,{caller, api}
-                          ,{log_level, LogLevel} | output_dir(OutputDir, Options)] ++ ErlOpts, AllOptions);
+                          ,{log_level, LogLevel}
+                          ,{api_caller_overlays, ExtraOverlays}
+                          | output_dir(OutputDir, Options)] ++ ErlOpts, AllOptions);
             Config ->
                 Config1 = [{overlay_vars, [{base_dir, rebar_dir:base_dir(State)}]}
                            | merge_overlays(Config)],
                 relx:main([{lib_dirs, LibDirs}
                           ,{config, Config1}
                           ,{caller, api}
-                          ,{log_level, LogLevel} | output_dir(OutputDir, Options)] ++ ErlOpts, AllOptions)
+                          ,{log_level, LogLevel}
+                          ,{api_caller_overlays, ExtraOverlays}
+                          | output_dir(OutputDir, Options)] ++ ErlOpts, AllOptions)
         end,
         rebar_hooks:run_project_and_app_hooks(Cwd, post, Provider, Providers, State),
         {ok, State}

test/rebar_release_SUITE.erl

@@ -301,7 +301,8 @@ overlay_vars(Config) ->
                   {var_bin_string, {{{var_bin_string}}}},
                   {var_tuple, {{{var_tuple}}}},
                   {var_list, {{{var_list}}}},
-                  {var_bin, {{{var_bin}}}}]],
+                  {var_bin, {{{var_bin}}}},
+                  {var_profile_string, {{profile_string}}}]], % this comes from `rebar3'
     rebar_test_utils:create_config(AppDir,
                                    filename:join([AppDir, "config", "app.config"]),
                                    AppConfig),
@@ -318,6 +319,7 @@ overlay_vars(Config) ->
                          {var_bin_string, <<"test">>},
                          {var_tuple, {t, ['atom']}},
                          {var_list, [a, b, c, 'd']},
-                         {var_bin, <<23, 24, 25>>}],
+                         {var_bin, <<23, 24, 25>>},
+                         {var_profile_string, 'default'}],
     {ok, [ExpectedSysconfig]} = file:consult(filename:join([AppDir, "_build/default/rel",
                                                           Name, "releases", Vsn, "sys.config"])).