Adding test for new release generation overlay system

--HG--
extra : rebase_source : cd143fdf55773dcfbeeda687570b226def42e4f5

inttest/rgen1/reltool.config

@@ -0,0 +1,31 @@
+%% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+{sys, [
+       {rel, "rgen1", "0.1",
+        [
+         kernel,
+         stdlib,
+         sasl,
+         crypto
+        ]},
+       {rel, "start_clean", "",
+        [
+         kernel,
+         stdlib
+        ]},
+       {boot_rel, "rgen1"},
+       {profile, embedded},
+       {excl_sys_filters, ["^bin/.*",
+                           "^erts.*/bin/(dialyzer|typer)"]},
+       {excl_archive_filters, [".*"]},
+       {app, sasl, [{incl_cond, include}]}
+      ]}.
+
+{target_dir, "mytarget"}.
+
+{overlay_vars, "vars.config"}.
+
+{overlay, [
+           {mkdir, "data"},
+           {template, "test.config", "etc/test.config"}
+          ]}.

inttest/rgen1/rgen1_rt.erl

@@ -0,0 +1,18 @@
+-module(rgen1_rt).
+
+-compile(export_all).
+
+%% Exercise release generation w/ templating
+
+files() ->
+    [
+     {copy, "reltool.config"},
+     {copy, "test.config"},
+     {copy, "vars.config"},
+     {copy, "../../rebar"}
+    ].
+
+run(_Dir) ->
+    {ok, _} = retest_sh:run("./rebar -v generate", []),
+    true = filelib:is_dir("mytarget"),
+    ok.

inttest/rgen1/test.config

@@ -0,0 +1 @@
+{web_port, {{web_port}} }.

inttest/rgen1/vars.config

@@ -0,0 +1 @@
+{web_port, 1234}.