properly reset cwd after finding version of git resource

include/rebar.hrl

@@ -16,6 +16,7 @@
 -define(DEFAULT_LIB_DIRS, ["_checkouts", "apps", "libs", "."]).
 -define(DEFAULT_DEPS_DIR, "_deps").
 -define(DEFAULT_PLUGINS_DIR, "_plugins").
+-define(DEFAULT_TEST_DEPS_DIR, "_tdeps").
 -define(DEFAULT_CONFIG_FILE, "rebar.config").
 -define(LOCK_FILE, "rebar.lock").
 

src/rebar_git_resource.erl

@@ -84,7 +84,7 @@ download(Dir, {git, Url, Rev}) ->
     rebar_utils:sh(?FMT("git checkout -q ~s", [Rev]), [{cd, Dir}]).
 
 make_vsn(Dir) ->
-    Cwd = file:get_cwd(),
+    {ok, Cwd} = file:get_cwd(),
     try
         ok = file:set_cwd(Dir),
         {Vsn, RawRef, RawCount} = collect_default_refcount(),

src/rebar_prv_common_test.erl

@@ -34,6 +34,7 @@ init(State) ->
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()}.
 do(State) ->
     Opts = build_options(State),
+    expand_test_deps(filename:absname(rebar_state:get(State, test_deps_dir, ?DEFAULT_TEST_DEPS_DIR))),
     ct:run_test(Opts),
     {ok, State}.
 
@@ -41,6 +42,10 @@ do(State) ->
 format_error(Reason, State) ->
     {io_lib:format("~p", [Reason]), State}.
 
+expand_test_deps(Dir) ->
+    Apps = filelib:wildcard(filename:join([Dir, "*", "ebin"])),
+    ok = code:add_pathsa(Apps).
+
 ct_opts(State) ->
     DefaultTestDir = filename:join([rebar_state:dir(State), "test"]),
     DefaultLogsDir = filename:join([rebar_state:dir(State), "logs"]),

src/rebar_prv_test_deps.erl

@@ -11,8 +11,6 @@
 -define(PROVIDER, test_deps).
 -define(DEPS, []).
 
--define(DEFAULT_TEST_DEPS_DIR, "_tdeps").
-
 %% ===================================================================
 %% Public API
 %% ===================================================================