From 5a6b551eb51853c2297d74bac2c9e9c14a2d4409 Mon Sep 17 00:00:00 2001
From: Tristan Sloughter <t@crashfast.com>
Date: Fri, 19 Jun 2015 21:14:38 -0500
Subject: print help for namespaces

---
 src/rebar_prv_do.erl | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src/rebar_prv_do.erl')

diff --git a/src/rebar_prv_do.erl b/src/rebar_prv_do.erl
index 35e85c2..f850135 100644
--- a/src/rebar_prv_do.erl
+++ b/src/rebar_prv_do.erl
@@ -33,8 +33,16 @@ init(State) ->
 
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
-    Tasks = rebar_utils:args_to_tasks(rebar_state:command_args(State)),
-    do_tasks(Tasks, State).
+    case rebar_utils:args_to_tasks(rebar_state:command_args(State)) of
+        [] ->
+            AllProviders = rebar_state:providers(State),
+            Namespace = rebar_state:namespace(State),
+            Providers = providers:get_providers_by_namespace(Namespace, AllProviders),
+            providers:help(Providers),
+            {ok, State};
+        Tasks ->
+            do_tasks(Tasks, State)
+    end.
 
 do_tasks([], State) ->
     {ok, State};
-- 
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