use mustache instead of erlydtl for overlays

18 files changed, 171 insertions, 246 deletions

diff --git a/priv/templates/bin.dtl b/priv/templates/bin
index dd11707..dd11707 100755
--- a/priv/templates/bin.dtl
+++ b/priv/templates/bin
diff --git a/priv/templates/bin_windows.dtl b/priv/templates/bin_windows
index 3466292..3466292 100644
--- a/priv/templates/bin_windows.dtl
+++ b/priv/templates/bin_windows
diff --git a/priv/templates/erl_ini.dtl b/priv/templates/erl_ini
index b2ce5bc..b2ce5bc 100644
--- a/priv/templates/erl_ini.dtl
+++ b/priv/templates/erl_ini
diff --git a/priv/templates/erl_script.dtl b/priv/templates/erl_script
index 72e93dd..72e93dd 100644
--- a/priv/templates/erl_script.dtl
+++ b/priv/templates/erl_script
diff --git a/priv/templates/extended_bin.dtl b/priv/templates/extended_bin
index 452669c..452669c 100755
--- a/priv/templates/extended_bin.dtl
+++ b/priv/templates/extended_bin
diff --git a/priv/templates/extended_bin_windows.dtl b/priv/templates/extended_bin_windows
index cb9f747..cb9f747 100644
--- a/priv/templates/extended_bin_windows.dtl
+++ b/priv/templates/extended_bin_windows
diff --git a/priv/templates/install_upgrade_escript.dtl b/priv/templates/install_upgrade_escript
index 3fb9d04..3fb9d04 100644
--- a/priv/templates/install_upgrade_escript.dtl
+++ b/priv/templates/install_upgrade_escript
diff --git a/priv/templates/nodetool.dtl b/priv/templates/nodetool
index dee14b4..dee14b4 100644
--- a/priv/templates/nodetool.dtl
+++ b/priv/templates/nodetool
diff --git a/priv/templates/sys_config.dtl b/priv/templates/sys_config
index eda2e75..eda2e75 100644
--- a/priv/templates/sys_config.dtl
+++ b/priv/templates/sys_config
diff --git a/priv/templates/vm_args.dtl b/priv/templates/vm_args
index 558ce39..558ce39 100644
--- a/priv/templates/vm_args.dtl
+++ b/priv/templates/vm_args
diff --git a/rebar.config b/rebar.config
index 74ae226..facbdc8 100644
--- a/rebar.config
+++ b/rebar.config
@@ -6,16 +6,17 @@
         {providers, ".*",
          {git, "https://github.com/tsloughter/providers.git",
           {tag, "v1.3.0"}}},
-        {erlydtl, ".*",
-         {git, "https://github.com/erlydtl/erlydtl.git",
+        {mustache, ".*",
+         {git, "https://github.com/soranoba/mustache.git",
           {branch, "master"}}},
         {getopt, "",
          {git, "https://github.com/jcomellas/getopt.git",
           {branch, "master"}}}]}.
 
+{escript_incl_extra, [{"priv/templates/*", "."}]}.
 {escript_emu_args, "%%! +sbtu +A0 -noinput\n"}.
 {escript_incl_apps,
- [getopt, erlware_commons, merl, erlydtl, providers, relx]}.
+ [getopt, erlware_commons, providers, relx]}.
 
 %% Compiler Options ============================================================
 {erl_opts,
@@ -28,13 +29,6 @@
 {eunit_opts,
  [{report, {eunit_surefire, [{dir, "."}]}}]}.
 
-%% Erlydtl =====================================================================
-{erlydtl_opts, [{doc_root, "priv/templates"},
-                force_recompile,
-                {compiler_options, [report, return, debug_info]}]}.
-
-{provider_hooks, [{pre, [{compile, {erlydtl, compile}}]}]}.
-
 %% Profiles ====================================================================
 
 {profiles, [{dev, [{deps, [{neotoma, ".*",
@@ -43,6 +37,8 @@
                   ]
             }]}.
 
+{overrides, [{override, mustache, [{deps, []}, {plugins, []}]}]}.
+
 {ct_opts, [{cover_spec, "cover.spec"},
            {cover_enabled, true},
            {cover_print_enabled, true}]}.
diff --git a/rebar.lock b/rebar.lock
index 8bfc7c1..0f47b93 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -2,27 +2,19 @@
   {git,"https://github.com/erlware/rebar_vsn_plugin.git",
        {ref,"fd40c960c7912193631d948fe962e1162a8d1334"}},
   1},
- {<<"merl">>,
-  {git,"git://github.com/erlydtl/merl.git",
-       {ref,"750b09d44425f435ff579a4d28bf5844bb5b4ef1"}},
-  1},
- {<<"eunit_formatters">>,
-  {git,"git://github.com/seancribbs/eunit_formatters",
-       {ref,"2c73eb6e46b0863f19507857b386a48a53aaf141"}},
-  1},
  {<<"providers">>,
   {git,"https://github.com/tsloughter/providers.git",
        {ref,"d565693cbbca3457df34d95c53c47e1faa8cde6c"}},
   0},
+ {<<"mustache">>,
+  {git,"https://github.com/soranoba/mustache.git",
+       {ref,"5a15c03e0bcc307dd4165208802b1641dbf88b50"}},
+  0},
  {<<"getopt">>,
   {git,"https://github.com/jcomellas/getopt.git",
        {ref,"626698975e63866156159661d100785d65eab6f9"}},
   0},
- {<<"erlydtl">>,
-  {git,"https://github.com/erlydtl/erlydtl.git",
-       {ref,"de00ccf522be8d3f9b0dcb7cd680f83b4fb7267a"}},
-  0},
  {<<"erlware_commons">>,
   {git,"https://github.com/erlware/erlware_commons.git",
-       {ref,"05b956da26788f30b3cb793fa6ace02b75f481d0"}},
+       {ref,"ef0d252b11c863f9c228af2fe93a4e42fba2f7f3"}},
   0}].
diff --git a/src/rlx_prv_archive.erl b/src/rlx_prv_archive.erl
index 3ed34f8..59fbdc2 100644
--- a/src/rlx_prv_archive.erl
+++ b/src/rlx_prv_archive.erl
@@ -144,8 +144,7 @@ overlay_files(_, undefined, _) ->
 overlay_files(OverlayVars, Overlay, OutputDir) ->
     [begin
          To = to(O),
-         ToTemplateName = rlx_prv_overlay:make_template_name("rlx_template_to_template", To),
-         File = rlx_prv_overlay:render_string(OverlayVars, To, ToTemplateName),
+         File = rlx_prv_overlay:render_string(OverlayVars, To),
          {ec_cnv:to_list(File), ec_cnv:to_list(filename:join(OutputDir, File))}
      end || O <- Overlay, filter(O)].
 
diff --git a/src/rlx_prv_assembler.erl b/src/rlx_prv_assembler.erl
index 60cef76..5fa1817 100644
--- a/src/rlx_prv_assembler.erl
+++ b/src/rlx_prv_assembler.erl
@@ -545,20 +545,20 @@ ensure_not_exist(RelConfPath) ->
     end.
 
 erl_script(ErtsVsn) ->
-    render(erl_script_dtl, [{erts_vsn, ErtsVsn}]).
+    render(erl_script, [{erts_vsn, ErtsVsn}]).
 
 bin_file_contents(OsFamily, RelName, RelVsn, ErtsVsn, ErlOpts) ->
     Template = case OsFamily of
-        unix -> bin_dtl;
-        win32 -> bin_windows_dtl
+        unix -> bin;
+        win32 -> bin_windows
     end,
     render(Template, [{rel_name, RelName}, {rel_vsn, RelVsn},
                       {erts_vsn, ErtsVsn}, {erl_opts, ErlOpts}]).
 
 extended_bin_file_contents(OsFamily, RelName, RelVsn, ErtsVsn, ErlOpts) ->
     Template = case OsFamily of
-        unix -> extended_bin_dtl;
-        win32 -> extended_bin_windows_dtl
+        unix -> extended_bin;
+        win32 -> extended_bin_windows
     end,
     render(Template, [{rel_name, RelName}, {rel_vsn, RelVsn},
                       {erts_vsn, ErtsVsn}, {erl_opts, ErlOpts}]).
@@ -566,23 +566,25 @@ extended_bin_file_contents(OsFamily, RelName, RelVsn, ErtsVsn, ErlOpts) ->
 erl_ini(OutputDir, ErtsVsn) ->
     ErtsDirName = string:concat("erts-", ErtsVsn),
     BinDir = filename:join([OutputDir, ErtsDirName, bin]),
-    render(erl_ini_dtl, [{bin_dir, BinDir}, {output_dir, OutputDir}]).
+    render(erl_ini, [{bin_dir, BinDir}, {output_dir, OutputDir}]).
 
 install_upgrade_escript_contents() ->
-    render(install_upgrade_escript_dtl).
+    render(install_upgrade_escript).
 
 nodetool_contents() ->
-    render(nodetool_dtl).
+    render(nodetool).
 
 sys_config_file() ->
-    render(sys_config_dtl).
+    render(sys_config).
 
 vm_args_file(RelName) ->
-    render(vm_args_dtl, [{rel_name, RelName}]).
+    render(vm_args, [{rel_name, RelName}]).
 
 render(Template) ->
     render(Template, []).
 
 render(Template, Data) ->
-    {ok, Rendered} = Template:render(Data),
-    Rendered.
+    Files = rlx_util:template_files(),
+    Tpl = rlx_util:load_file(Files, escript, atom_to_list(Template)),
+    {ok, Content} = rlx_util:render(Tpl, Data),
+    Content.
diff --git a/src/rlx_prv_overlay.erl b/src/rlx_prv_overlay.erl
index d9c409c..6c27b5c 100644
--- a/src/rlx_prv_overlay.erl
+++ b/src/rlx_prv_overlay.erl
@@ -29,13 +29,10 @@
          format_error/1]).
 
 -export([generate_overlay_vars/2,
-         make_template_name/2,
-         render_string/3]).
+         render_string/2]).
 
 -define(DIRECTORY_RE, ".*(\/|\\\\)$").
 
--define(ERLYDTL_COMPILE_OPTS, [report_warnings, return_errors, {auto_escape, false}, {out_dir, false}]).
-
 -include("relx.hrl").
 
 -define(PROVIDER, overlay).
@@ -64,7 +61,8 @@ do(State) ->
                 {error, Reason} ->
                     {error, Reason};
                 OverlayVars ->
-                    do_overlay(State, OverlayVars)
+                    Files = rlx_util:template_files(),
+                    do_overlay(State, Files, OverlayVars)
             end;
         false ->
             ?RLX_ERROR({unresolved_release, RelName, RelVsn})
@@ -79,6 +77,9 @@ format_error({ec_file_error, AppDir, TargetDir, E}) ->
 format_error({unable_to_read_varsfile, FileName, Reason}) ->
     io_lib:format("Unable to read vars file (~s) for overlay due to: ~p",
                   [FileName, Reason]);
+format_error({read_template, FileName, Reason}) ->
+    io_lib:format("Unable to read template file (~s) for overlay due to: ~s",
+                  [FileName, file:format_error(Reason)]);
 format_error({overlay_failed, Errors}) ->
     [[format_error(rlx_util:error_reason(Error)), "\n"] || Error <- Errors];
 format_error({dir_render_failed, Dir, Error}) ->
@@ -183,8 +184,16 @@ merge_overlay_vars(State, FileNames) ->
     lists:foldl(fun(FileName, Acc) ->
                         RelativePath = filename:join(RelativeRoot, erlang:iolist_to_binary(FileName)),
                         case file:consult(RelativePath) of
+                            %% {ok, [Terms]} ->
+                            %%     lists:ukeymerge(1, lists:ukeysort(1, Terms), Acc);
+                            %%     % the location of the included overlay files will be relative
+                            %%     %% to the current one being read
+                            %%     %% OverlayRelativeRoot = filename:dirname(FileName),
+                            %%     %% NewTerms = check_overlay_inclusion(State, OverlayRelativeRoot, Terms),
+
+                            %%     %% lists:ukeymerge(1, lists:ukeysort(1, NewTerms), Acc);
                             {ok, Terms} ->
-                                % the location of the included overlay files will be relative
+                                %% the location of the included overlay files will be relative
                                 %% to the current one being read
                                 OverlayRelativeRoot = filename:dirname(FileName),
                                 NewTerms = check_overlay_inclusion(State, OverlayRelativeRoot, Terms),
@@ -237,26 +246,7 @@ generate_release_vars(Release) ->
      {release_erts_version, rlx_release:erts(Release)},
      {release_name, rlx_release:name(Release)},
      {rel_vsn, rlx_release:vsn(Release)},
-     {release_version, rlx_release:vsn(Release)},
-     {release_applications, lists:map(fun(App) ->
-                                              rlx_app_info:name(App)
-                                        end, rlx_release:application_details(Release))},
-    {release, [generate_app_vars(App)|| App <- rlx_release:application_details(Release)]},
-     {release_goals,   [if
-                            erlang:is_list(Constraint) ->
-                                Constraint;
-                            true ->
-                                rlx_depsolver:format_constraint(Constraint)
-                        end || Constraint <- rlx_release:goals(Release)]}].
-
--spec generate_app_vars(rlx_app_info:t()) -> AppInfo::tuple().
-generate_app_vars(App) ->
-    {rlx_app_info:name(App),
-     [{version, rlx_app_info:original_vsn(App)},
-      {dir, rlx_app_info:dir(App)},
-      {active_dependencies, rlx_app_info:active_deps(App)},
-      {library_dependencies, rlx_app_info:library_deps(App)},
-      {link, rlx_app_info:link(App)}]}.
+     {release_version, rlx_release:vsn(Release)}].
 
 -spec generate_state_vars(rlx_state:t()) -> proplists:proplist().
 generate_state_vars(State) ->
@@ -288,16 +278,16 @@ generate_state_vars(State) ->
                                erlang:atom_to_list(Name1) ++ "-" ++ Vsn1
                        end}].
 
--spec do_overlay(rlx_state:t(), proplists:proplist()) ->
+-spec do_overlay(rlx_state:t(), list(), proplists:proplist()) ->
                                    {ok, rlx_state:t()} | relx:error().
-do_overlay(State, OverlayVars) ->
+do_overlay(State, Files, OverlayVars) ->
     case rlx_state:get(State, overlay, undefined) of
         undefined ->
             {ok, State};
         Overlays ->
             handle_errors(State,
                           lists:map(fun(Overlay) ->
-                                            do_individual_overlay(State, OverlayVars,
+                                            do_individual_overlay(State, Files, OverlayVars,
                                                                   Overlay)
                                     end, Overlays))
     end.
@@ -313,61 +303,49 @@ handle_errors(State, Result) ->
             {ok, State}
     end.
 
--spec do_individual_overlay(rlx_state:t(), proplists:proplist(),
+-spec do_individual_overlay(rlx_state:t(), list(), proplists:proplist(),
                             OverlayDirective::term()) ->
                                    {ok, rlx_state:t()} | relx:error().
-do_individual_overlay(State, OverlayVars, {mkdir, Dir}) ->
-    ModuleName = make_template_name("rlx_mkdir_template", Dir),
-    case erlydtl:compile(erlang:iolist_to_binary(Dir), ModuleName, ?ERLYDTL_COMPILE_OPTS) of
-        {ok, ModuleName} ->
-            case render(ModuleName, OverlayVars) of
-                {ok, IoList} ->
-                    Absolute = absolutize(State,
-                                          filename:join(rlx_state:output_dir(State),
-                                                        erlang:iolist_to_binary(IoList))),
-                    case rlx_util:mkdir_p(Absolute) of
-                        {error, Error} ->
-                            ?RLX_ERROR({unable_to_make_dir, Absolute, Error});
-                        ok ->
-                            ok
-                    end;
+do_individual_overlay(State, _Files, OverlayVars, {mkdir, Dir}) ->
+    case rlx_util:render(erlang:iolist_to_binary(Dir), OverlayVars) of
+        {ok, IoList} ->
+            Absolute = absolutize(State,
+                                  filename:join(rlx_state:output_dir(State),
+                                                erlang:iolist_to_binary(IoList))),
+            case rlx_util:mkdir_p(Absolute) of
                 {error, Error} ->
-                    ?RLX_ERROR({dir_render_failed, Dir, Error})
+                    ?RLX_ERROR({unable_to_make_dir, Absolute, Error});
+                ok ->
+                    ok
             end;
-        {error, Reason, _Warnings} ->
-            ?RLX_ERROR({unable_to_compile_template, Dir, Reason})
+        {error, Error} ->
+            ?RLX_ERROR({dir_render_failed, Dir, Error})
     end;
-do_individual_overlay(State, OverlayVars, {copy, From, To}) ->
-    FromTemplateName = make_template_name("rlx_copy_from_template", From),
-    ToTemplateName = make_template_name("rlx_copy_to_template", To),
-    file_render_do(OverlayVars, From, FromTemplateName,
+do_individual_overlay(State, _Files, OverlayVars, {copy, From, To}) ->
+    file_render_do(OverlayVars, From,
                    fun(FromFile) ->
-                           file_render_do(OverlayVars, To, ToTemplateName,
+                           file_render_do(OverlayVars, To,
                                           fun(ToFile) ->
                                                   copy_to(State, FromFile, ToFile)
                                           end)
                    end);
-do_individual_overlay(State, OverlayVars, {link, From, To}) ->
+do_individual_overlay(State, Files, OverlayVars, {link, From, To}) ->
     case rlx_state:dev_mode(State) of
         false ->
-            do_individual_overlay(State, OverlayVars, {copy, From, To});
+            do_individual_overlay(State, Files, OverlayVars, {copy, From, To});
         true  ->
-            FromTemplateName = make_template_name("rlx_copy_from_template", From),
-            ToTemplateName = make_template_name("rlx_copy_to_template", To),
-            file_render_do(OverlayVars, From, FromTemplateName,
+            file_render_do(OverlayVars, From,
                            fun(FromFile) ->
-                                   file_render_do(OverlayVars, To, ToTemplateName,
+                                   file_render_do(OverlayVars, To,
                                                   fun(ToFile) ->
                                                           link_to(State, FromFile, ToFile)
                                                   end)
                            end)
     end;
-do_individual_overlay(State, OverlayVars, {template, From, To}) ->
-    FromTemplateName = make_template_name("rlx_template_from_template", From),
-    ToTemplateName = make_template_name("rlx_template_to_template", To),
-    file_render_do(OverlayVars, From, FromTemplateName,
+do_individual_overlay(State, _Files, OverlayVars, {template, From, To}) ->
+    file_render_do(OverlayVars, From,
                    fun(FromFile) ->
-                           file_render_do(OverlayVars, To, ToTemplateName,
+                           file_render_do(OverlayVars, To,
                                           fun(ToFile) ->
                                                   RelativeRoot = get_relative_root(State),
                                                   FromFile0 = absolutize(State,
@@ -465,85 +443,55 @@ is_directory(ToFile0, ToFile1) ->
 -spec render_template(proplists:proplist(), iolist()) ->
                              ok | relx:error().
 render_template(OverlayVars, Data) ->
-    TemplateName = make_template_name("rlx_template_renderer", Data),
-    case erlydtl:compile(Data, TemplateName, ?ERLYDTL_COMPILE_OPTS) of
-        Good when Good =:= ok; Good =:= {ok, TemplateName} ->
-            case render(TemplateName, OverlayVars) of
-                {ok, IoData} ->
-                    {ok, IoData};
-                {error, Reason} ->
-                    ?RLX_ERROR({unable_to_render_template, Data, Reason})
-            end;
-        {error, Reason, _Warnings} ->
-            ?RLX_ERROR({unable_to_compile_template, Data, Reason})
+    case rlx_util:render(Data, OverlayVars) of
+        {ok, IoData} ->
+            {ok, IoData};
+        {error, Reason} ->
+            ?RLX_ERROR({unable_to_render_template, Data, Reason})
     end.
 
 write_template(OverlayVars, FromFile, ToFile) ->
-    case render_template(OverlayVars, FromFile) of
-        {ok, IoData} ->
-            case filelib:ensure_dir(ToFile) of
-                ok ->
-                    case file:write_file(ToFile, IoData) of
+    case file:read_file(FromFile) of
+        {ok, File} ->
+            case render_template(OverlayVars, File) of
+                {ok, IoData} ->
+                    case filelib:ensure_dir(ToFile) of
                         ok ->
-                            {ok, FileInfo} = file:read_file_info(FromFile),
-                            ok = file:write_file_info(ToFile, FileInfo),
-                            ok;
+                            case file:write_file(ToFile, IoData) of
+                                ok ->
+                                    {ok, FileInfo} = file:read_file_info(FromFile),
+                                    ok = file:write_file_info(ToFile, FileInfo),
+                                    ok;
+                                {error, Reason} ->
+                                    ?RLX_ERROR({unable_to_write, ToFile, Reason})
+                            end;
                         {error, Reason} ->
-                            ?RLX_ERROR({unable_to_write, ToFile, Reason})
+                            ?RLX_ERROR({unable_to_enclosing_dir, ToFile, Reason})
                     end;
-                {error, Reason} ->
-                    ?RLX_ERROR({unable_to_enclosing_dir, ToFile, Reason})
+                Error ->
+                    Error
             end;
-        Error ->
-            Error
+        {error, Error} ->
+            ?RLX_ERROR({read_template, Error})
     end.
 
-render_string(OverlayVars, Data, TemplateName) ->
-    case erlydtl:compile(erlang:iolist_to_binary(Data), TemplateName, ?ERLYDTL_COMPILE_OPTS) of
-        {ok, TemplateName} ->
-            case render(TemplateName, OverlayVars) of
-                {ok, IoList} ->
-                    erlang:iolist_to_binary(IoList);
-                {error, Error} ->
-                    ?RLX_ERROR({render_failed, Data, Error})
-            end;
-        {error, Reason, _Warnings} ->
-            ?RLX_ERROR({unable_to_compile_template, Data, Reason})
+render_string(OverlayVars, Data) ->
+    case rlx_util:render(Data, OverlayVars) of
+        {ok, IoList} ->
+            erlang:iolist_to_binary(IoList);
+        {error, Error} ->
+            ?RLX_ERROR({render_failed, Data, Error})
     end.
 
--spec file_render_do(proplists:proplist(), iolist(), module(),
+-spec file_render_do(proplists:proplist(), iolist(),
                      fun((term()) -> {ok, rlx_state:t()} | relx:error())) ->
                             {ok, rlx_state:t()} | relx:error().
-file_render_do(OverlayVars, Data, TemplateName, NextAction) ->
-    case erlydtl:compile(erlang:iolist_to_binary(Data), TemplateName, ?ERLYDTL_COMPILE_OPTS) of
-        {ok, TemplateName} ->
-            case render(TemplateName, OverlayVars) of
-                {ok, IoList} ->
-                    NextAction(IoList);
-                {error, Error} ->
-                    ?RLX_ERROR({render_failed, Data, Error})
-            end;
-        {error, Reason, _Warnings} ->
-            ?RLX_ERROR({unable_to_compile_template, Data, Reason})
-    end.
-
--spec make_template_name(string(), term()) -> module().
-make_template_name(Base, Value) ->
-    %% Seed so we get different values each time
-    random:seed(os:timestamp()),
-    Hash = erlang:phash2(Value),
-    Ran = random:uniform(10000000),
-    erlang:list_to_atom(Base ++ "_" ++
-                            erlang:integer_to_list(Hash) ++
-                            "_" ++ erlang:integer_to_list(Ran)).
-
--spec render(module(), proplists:proplist()) -> {ok, iolist()} | {error, Reason::term()}.
-render(ModuleName, OverlayVars) ->
-    try
-        ModuleName:render(OverlayVars)
-    catch
-        _:Reason ->
-            {error, Reason}
+file_render_do(OverlayVars, File, NextAction) ->
+    case rlx_util:render(File, OverlayVars) of
+        {ok, IoList} ->
+            NextAction(IoList);
+        {error, Error} ->
+            ?RLX_ERROR({render_failed, File, Error})
     end.
 
 absolutize(State, FileName) ->
diff --git a/src/rlx_util.erl b/src/rlx_util.erl
index 9c4dcc2..4639ffa 100644
--- a/src/rlx_util.erl
+++ b/src/rlx_util.erl
@@ -32,7 +32,12 @@
          error_reason/1,
          indent/1,
          optional_to_string/1,
-         wildcard_paths/1]).
+         wildcard_paths/1,
+         render/1,
+         render/2,
+         load_file/3,
+         template_files/0,
+         escript_foldl/3]).
 
 -define(ONE_LEVEL_INDENT, "     ").
 %%============================================================================
@@ -147,6 +152,61 @@ wildcard(Path) when is_list(Path) ->
         Paths -> Paths
     end.
 
+render(Template) ->
+    render(Template, []).
+
+render(Template, Data) ->
+    {ok, mustache:render(ec_cnv:to_binary(Template), Data)}.
+
+load_file(Files, escript, Name) ->
+    {Name, Bin} = lists:keyfind(Name, 1, Files),
+    Bin;
+load_file(_Files, file, Name) ->
+    {ok, Bin} = file:read_file(Name),
+    Bin.
+
+template_files() ->
+    find_priv_templates() ++ escript_files().
+
+find_priv_templates() ->
+    Files = filelib:wildcard(filename:join([code:priv_dir(relx), "templates", "*"])),
+    lists:map(fun(File) ->
+                      {ok, Bin} = file:read_file(File),
+                      {filename:basename(File), Bin}
+              end, Files).
+
+%% Scan the current escript for available files
+escript_files() ->
+    try
+        {ok, Files} = escript_foldl(
+                        fun(Name, _, GetBin, Acc) ->
+                                [{filename:basename(Name), GetBin()} | Acc]
+                        end, [], filename:absname(escript:script_name())),
+        Files
+    catch
+        _:_ ->
+            []
+    end.
+
+escript_foldl(Fun, Acc, File) ->
+    case escript:extract(File, [compile_source]) of
+        {ok, [_Shebang, _Comment, _EmuArgs, Body]} ->
+            case Body of
+                {source, BeamCode} ->
+                    GetInfo = fun() -> file:read_file_info(File) end,
+                    GetBin = fun() -> BeamCode end,
+                    {ok, Fun(".", GetInfo, GetBin, Acc)};
+                {beam, BeamCode} ->
+                    GetInfo = fun() -> file:read_file_info(File) end,
+                    GetBin = fun() -> BeamCode end,
+                    {ok, Fun(".", GetInfo, GetBin, Acc)};
+                {archive, ArchiveBin} ->
+                    zip:foldl(Fun, Acc, {File, ArchiveBin})
+            end;
+        {error, _} = Error ->
+            Error
+    end.
+
 %%%===================================================================
 %%% Test Functions
 %%%===================================================================
diff --git a/test/rlx_release_SUITE.erl b/test/rlx_release_SUITE.erl
index 766eb40..c4c782b 100644
--- a/test/rlx_release_SUITE.erl
+++ b/test/rlx_release_SUITE.erl
@@ -497,18 +497,17 @@ overlay_release(Config) ->
 
     VarsFile1 = filename:join([LibDir1, "vars1.config"]),
     rlx_test_utils:write_config(VarsFile1, [{yahoo, "yahoo"},
-                             {yahoo2, [{foo, "bar"}]},
-                             {yahoo3, [{bar, "{{yahoo}}/{{yahoo2.foo}}"}]},
-                             {foo_dir, "foodir"}]),
+                                            {yahoo2, [{foo, "bar"}]},
+                                            {foo_dir, "foodir"}]),
 
     VarsFile2 = filename:join([LibDir1, "vars2.config"]),
     rlx_test_utils:write_config(VarsFile2, [{google, "yahoo"},
-                             {yahoo2, [{foo, "foo"}]},
-                             OverlayVars3]),
+                                            {yahoo2, "foo"},
+                                            OverlayVars3]),
 
     VarsFile3 = filename:join([LibDir1, "vars3.config"]),
     rlx_test_utils:write_config(VarsFile3, [{google, "yahoo"},
-                             {yahoo4, [{foo, "{{yahoo}}/{{yahoo2.foo}}4"}]}]),
+                                            {yahoo4, "{{yahoo}}/{{yahoo2}}4"}]),
 
     ok = rlx_util:mkdir_p(TestDirFull),
     ok = file:write_file(TestFileFull, rlx_test_utils:test_template_contents()),
@@ -557,59 +556,6 @@ overlay_release(Config) ->
                  proplists:get_value(release_version, TemplateData)),
     ?assertEqual(foo,
                  proplists:get_value(release_name, TemplateData)),
-    ?assertEqual([kernel,stdlib,lib_dep_1,non_goal_2,non_goal_1,
-                  goal_app_1,goal_app_2],
-                 proplists:get_value(release_applications, TemplateData)),
-    ?assert(proplists:is_defined(std_version, TemplateData)),
-    ?assert(proplists:is_defined(kernel_version, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(non_goal_1_version, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(non_goal_2_version, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(goal_app_1_version, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(goal_app_2_version, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(lib_dep_1, TemplateData)),
-    ?assert(proplists:is_defined(lib_dep_1_dir, TemplateData)),
-    ?assertEqual([stdlib,kernel],
-                 proplists:get_value(lib_dep_1_active, TemplateData)),
-    ?assertEqual([],
-                 proplists:get_value(lib_dep_1_library, TemplateData)),
-    ?assertEqual("false",
-                 proplists:get_value(lib_dep_1_link, TemplateData)),
-    ?assertEqual("(3:debug)",
-                 proplists:get_value(log, TemplateData)),
-    ?assertEqual(filename:join(OutputDir, "foo"),
-                 proplists:get_value(output_dir, TemplateData)),
-    ?assertEqual(filename:join(OutputDir, "foo"),
-                 proplists:get_value(target_dir, TemplateData)),
-    ?assertEqual([],
-                 proplists:get_value(overridden, TemplateData)),
-    ?assertEqual([""],
-                 proplists:get_value(goals, TemplateData)),
-    ?assert(proplists:is_defined(lib_dirs, TemplateData)),
-    ?assert(proplists:is_defined(config_file, TemplateData)),
-    ?assertEqual([""],
-                 proplists:get_value(goals, TemplateData)),
-    ?assertEqual([],
-                 proplists:get_value(sys_config, TemplateData)),
-    ?assert(proplists:is_defined(root_dir, TemplateData)),
-    ?assertEqual(foo,
-                 proplists:get_value(default_release_name, TemplateData)),
-    ?assertEqual("0.0.1",
-                 proplists:get_value(default_release_version, TemplateData)),
-    ?assertEqual("foo-0.0.1",
-                 proplists:get_value(default_release, TemplateData)),
-    ?assertEqual("yahoo",
-                 proplists:get_value(yahoo, TemplateData)),
-    ?assertEqual("foo",
-                 proplists:get_value(yahoo2_foo, TemplateData)),
-    ?assertEqual("foodir",
-                 proplists:get_value(foo_dir, TemplateData)),
-    ?assertEqual("yahoo/foo",
-                 proplists:get_value(yahoo3, TemplateData)),
     ?assertEqual("yahoo/foo4",
                  proplists:get_value(yahoo4, TemplateData)),
     ?assertEqual("yahoo",
diff --git a/test/rlx_test_utils.erl b/test/rlx_test_utils.erl
index 644c49f..4e0fc0d 100644
--- a/test/rlx_test_utils.erl
+++ b/test/rlx_test_utils.erl
@@ -65,34 +65,16 @@ test_template_contents() ->
         "{release_name, {{release_name}}}.\n"
         "{rel_vsn, \"{{release_version}}\"}.\n"
         "{release_version, \"{{release_version}}\"}.\n"
-        "{release_applications, [{{ release_applications|join:\", \" }}]}.\n"
-        "{std_version, \"{{release.stdlib.version}}\"}.\n"
-        "{kernel_version, \"{{release.kernel.version}}\"}.\n"
-        "{non_goal_1_version, \"{{release.non_goal_1.version}}\"}.\n"
-        "{non_goal_2_version, \"{{release.non_goal_2.version}}\"}.\n"
-        "{goal_app_1_version, \"{{release.goal_app_1.version}}\"}.\n"
-        "{goal_app_2_version, \"{{release.goal_app_2.version}}\"}.\n"
-        "{lib_dep_1, \"{{release.lib_dep_1.version}}\"}.\n"
-        "{lib_dep_1_dir, \"{{release.lib_dep_1.dir}}\"}.\n"
-        "{lib_dep_1_active, [{{ release.lib_dep_1.active_dependencies|join:\", \" }}]}.\n"
-        "{lib_dep_1_library, [{{ release.lib_dep_1.library_dependencies|join:\", \" }}]}.\n"
-        "{lib_dep_1_link, \"{{release.lib_dep_1.link}}\"}.\n"
         "{log, \"{{log}}\"}.\n"
         "{output_dir, \"{{output_dir}}\"}.\n"
         "{target_dir, \"{{target_dir}}\"}.\n"
-        "{overridden, [{{ overridden|join:\", \" }}]}.\n"
-        "{goals, [\"{{ goals|join:\", \" }}\"]}.\n"
-        "{lib_dirs, [\"{{ lib_dirs|join:\", \" }}\"]}.\n"
         "{config_file, \"{{ config_file }}\"}.\n"
-        "{providers, [{{ providers|join:\", \" }}]}.\n"
         "{sys_config, \"{{sys_config}}\"}.\n"
         "{root_dir, \"{{root_dir}}\"}.\n"
         "{default_release_name, {{default_release_name}}}.\n"
         "{default_release_version, \"{{default_release_version}}\"}.\n"
         "{default_release, \"{{default_release}}\"}.\n"
+        "{yahoo4, \"{{yahoo4}}\"}.\n"
         "{yahoo, \"{{yahoo}}\"}.\n"
-        "{yahoo2_foo, \"{{yahoo2.foo}}\"}.\n"
         "{foo_dir, \"{{foo_dir}}\"}.\n"
-        "{yahoo3, \"{{yahoo3.bar}}\"}.\n"
-        "{yahoo4, \"{{yahoo4.foo}}\"}.\n"
         "{google, \"{{google}}\"}.\n".