Add support for customising common test directory

This patch allows users to specify the directory in which common_test
source files can be found. Most common_test suites are integration,
rather than unit tests and keeping the sources apart from test sources
for other frameworks such as eunit and PropEr is a useful feature.

inttest/ct1/ct1_rt.erl

@@ -6,7 +6,8 @@
 files() ->
     [{create, "ebin/a1.app", app(a1)},
      {copy, "../../rebar", "rebar"},
-     {copy, "test_SUITE.erl", "test/test_SUITE.erl"}].
+     {copy, "rebar.config", "rebar.config"},
+     {copy, "test_SUITE.erl", "itest/test_SUITE.erl"}].
 
 run(_Dir) ->
     {ok, _} = retest:sh("./rebar compile ct"),

inttest/ct1/rebar.config

@@ -0,0 +1,2 @@
+
+{ct_dir, "itest"}.

rebar.config.sample

@@ -86,6 +86,9 @@
 
 %% == Common Test ==
 
+%% Override the default "test" directory in which SUITEs are located
+{ct_dir, "itest"}.
+
 %% Option to pass extra parameters when launching Common Test
 {ct_extra_params, "-boot start_sasl -s myapp"}.
 

src/rebar_ct.erl

@@ -46,7 +46,8 @@
 %% ===================================================================
 
 ct(Config, File) ->
-    run_test_if_present("test", Config, File).
+    TestDir = rebar_config:get_local(Config, ct_dir, "test"),
+    run_test_if_present(TestDir, Config, File).
 
 %% ===================================================================
 %% Internal functions