move deps and plugins to _ prefixed

include/rebar.hrl

@@ -23,7 +23,7 @@
                     opts :: list()}).          % The list of options that the task requires/understands
 
 -define(DEFAULT_LIB_DIRS, ["apps", "libs", "."]).
--define(DEFAULT_DEPS_DIR, "deps").
--define(DEFAULT_PLUGINS_DIR, "plugins").
+-define(DEFAULT_DEPS_DIR, "_deps").
+-define(DEFAULT_PLUGINS_DIR, "_plugins").
 -define(DEFAULT_CONFIG_FILE, "rebar.config").
 -define(LOCK_FILE, "rebar.lock").

priv/templates/gitignore.dtl

@@ -1,3 +1,4 @@
+_*
 .eunit
 deps
 priv

src/rebar_plugins.erl

@@ -12,7 +12,7 @@
 %% ===================================================================
 
 install(State) ->
-    State1 = rebar_state:set(State, deps_dir, "plugins"),
+    State1 = rebar_state:set(State, deps_dir, ?DEFAULT_PLUGINS_DIR),
 
     Plugins = rebar_state:get(State1, plugins, []),
     {ok, State2} = rebar_prv_install_deps:handle_deps(State1, Plugins),