fix for plugin installation and code paths

src/rebar_hooks.erl

@@ -10,11 +10,15 @@ run_all_hooks(Dir, Type, Command, Providers, State) ->
     run_hooks(Dir, Type, Command, State).
 
 run_provider_hooks(Dir, Type, Command, Providers, State) ->
+    PluginDepsPaths = rebar_state:code_paths(State, all_plugin_deps),
+    code:add_pathsa(PluginDepsPaths),
     State1 = rebar_state:providers(rebar_state:dir(State, Dir), Providers),
     AllHooks = rebar_state:get(State1, provider_hooks, []),
     TypeHooks = proplists:get_value(Type, AllHooks, []),
     HookProviders = proplists:get_all_values(Command, TypeHooks),
-    rebar_core:do(HookProviders, State1).
+    State2 = rebar_core:do(HookProviders, State1),
+    rebar_utils:remove_from_code_path(PluginDepsPaths),
+    State2.
 
 run_hooks(Dir, Type, Command, State) ->
     Hooks = case Type of

src/rebar_plugins.erl

@@ -32,31 +32,49 @@ handle_plugins(Plugins, State) ->
 
 handle_plugins(Profile, Plugins, State) ->
     %% Set deps dir to plugins dir so apps are installed there
+    Locks = rebar_state:lock(State),
+    DepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
     State1 = rebar_state:set(State, deps_dir, ?DEFAULT_PLUGINS_DIR),
 
-    PluginProviders = lists:flatmap(fun(Plugin) ->
-                                            handle_plugin(Profile, Plugin, State1)
-                                    end, Plugins),
+    {PluginProviders, State2} =
+        lists:foldl(fun(Plugin, {PluginAcc, StateAcc}) ->
+                            {NewPlugins, NewState} = handle_plugin(Profile, Plugin, StateAcc),
+                            {PluginAcc++NewPlugins, NewState}
+                      end, {[], State1}, Plugins),
 
     %% reset deps dir
-    State2 = rebar_state:set(State1, deps_dir, ?DEFAULT_DEPS_DIR),
+    State3 = rebar_state:set(State2, deps_dir, DepsDir),
+    State4 = rebar_state:lock(State3, Locks),
 
-    rebar_state:create_logic_providers(PluginProviders, State2).
+    rebar_state:create_logic_providers(PluginProviders, State4).
 
 handle_plugin(Profile, Plugin, State) ->
     try
-        {ok, _, State2} = rebar_prv_install_deps:handle_deps(Profile, State, [Plugin]),
+        {ok, Apps, State2} = rebar_prv_install_deps:handle_deps(Profile, State, [Plugin]),
+        {no_cycle, Sorted} = rebar_prv_install_deps:find_cycles(Apps),
+        ToBuild = rebar_prv_install_deps:cull_compile(Sorted, []),
 
-        Apps = rebar_state:all_deps(State2),
-        ToBuild = lists:dropwhile(fun rebar_app_info:valid/1, Apps),
+        %% Add already built plugin deps to the code path
+        CodePaths = [rebar_app_info:ebin_dir(A) || A <- Apps -- ToBuild],
+        code:add_pathsa(CodePaths),
+
+        %% Build plugin and its deps
         [build_plugin(AppInfo) || AppInfo <- ToBuild],
-        [true = code:add_patha(filename:join(rebar_app_info:dir(AppInfo), "ebin")) || AppInfo <- Apps],
-        plugin_providers(Plugin)
+
+        %% Add newly built deps and plugin to code path
+        State3 = rebar_state:update_all_plugin_deps(State2, Apps),
+        NewCodePaths = [rebar_app_info:ebin_dir(A) || A <- ToBuild],
+        code:add_pathsa(CodePaths),
+
+        %% Store plugin code paths so we can remove them when compiling project apps
+        State4 = rebar_state:update_code_paths(State3, all_plugin_deps, CodePaths++NewCodePaths),
+
+        {plugin_providers(Plugin), State4}
     catch
         C:T ->
             ?DEBUG("~p ~p ~p", [C, T, erlang:get_stacktrace()]),
             ?WARN("Plugin ~p not available. It will not be used.", [Plugin]),
-            []
+            {[], State}
     end.
 
 build_plugin(AppInfo) ->
@@ -65,6 +83,8 @@ build_plugin(AppInfo) ->
     S = rebar_state:new(rebar_state:new(), C, AppDir),
     rebar_prv_compile:compile(S, [], AppInfo).
 
+plugin_providers({Plugin, _, _, _}) when is_atom(Plugin) ->
+    validate_plugin(Plugin);
 plugin_providers({Plugin, _, _}) when is_atom(Plugin) ->
     validate_plugin(Plugin);
 plugin_providers({Plugin, _}) when is_atom(Plugin) ->

src/rebar_prv_compile.erl

@@ -32,8 +32,11 @@ init(State) ->
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
     DepsPaths = rebar_state:code_paths(State, all_deps),
+    PluginDepsPaths = rebar_state:code_paths(State, all_plugin_deps),
+    rebar_utils:remove_from_code_path(PluginDepsPaths),
     code:add_pathsa(DepsPaths),
 
+
     ProjectApps = rebar_state:project_apps(State),
     Providers = rebar_state:providers(State),
     Deps = rebar_state:deps_to_build(State),

src/rebar_prv_install_deps.erl

@@ -37,7 +37,10 @@
 
 -export([handle_deps/3,
          handle_deps/4,
-         handle_deps/5]).
+         handle_deps/5,
+
+         find_cycles/1,
+         cull_compile/2]).
 
 -export_type([dep/0]).
 
@@ -76,6 +79,10 @@ do(State) ->
         {Apps, State1} =
             lists:foldl(fun deps_per_profile/2, {[], State}, lists:reverse(Profiles)),
 
+        State2 = rebar_state:update_all_deps(State1, Apps),
+        CodePaths = [rebar_app_info:ebin_dir(A) || A <- Apps],
+        State3 = rebar_state:update_code_paths(State2, all_deps, CodePaths),
+
         Source = ProjectApps ++ Apps,
         case find_cycles(Source) of
             {cycles, Cycles} ->
@@ -84,7 +91,7 @@ do(State) ->
                 {error, Error};
             {no_cycle, Sorted} ->
                 ToCompile = cull_compile(Sorted, ProjectApps),
-                {ok, rebar_state:deps_to_build(State1, ToCompile)}
+                {ok, rebar_state:deps_to_build(State3, ToCompile)}
         end
     catch
         %% maybe_fetch will maybe_throw an exception to break out of some loops
@@ -158,11 +165,7 @@ handle_deps(Profile, State0, Deps, Upgrade, Locks) ->
                              ,lists:ukeysort(2, SrcApps)
                              ,lists:ukeysort(2, Solved)),
 
-    State5 = rebar_state:update_all_deps(State4, AllDeps),
-    CodePaths = [rebar_app_info:ebin_dir(A) || A <- AllDeps],
-    State6 = rebar_state:update_code_paths(State5, all_deps, CodePaths),
-
-    {ok, AllDeps, State6}.
+    {ok, AllDeps, State4}.
 
 %% ===================================================================
 %% Internal functions

src/rebar_state.erl

@@ -24,6 +24,7 @@
 
          project_apps/1, project_apps/2,
          deps_to_build/1, deps_to_build/2,
+         all_plugin_deps/1, all_plugin_deps/2, update_all_plugin_deps/2,
          all_deps/1, all_deps/2, update_all_deps/2,
          namespace/1, namespace/2,
 
@@ -55,6 +56,7 @@
 
                   project_apps        = []          :: [rebar_app_info:t()],
                   deps_to_build       = []          :: [rebar_app_info:t()],
+                  all_plugin_deps     = []          :: [rebar_app_info:t()],
                   all_deps            = []          :: [rebar_app_info:t()],
 
                   packages            = undefined   :: {rebar_dict(), rebar_digraph()} | undefined,
@@ -347,6 +349,15 @@ all_deps(#state_t{all_deps=Apps}) ->
 all_deps(State=#state_t{}, NewApps) ->
     State#state_t{all_deps=NewApps}.
 
+all_plugin_deps(#state_t{all_plugin_deps=Apps}) ->
+    Apps.
+
+all_plugin_deps(State=#state_t{}, NewApps) ->
+    State#state_t{all_plugin_deps=NewApps}.
+
+update_all_plugin_deps(State=#state_t{all_plugin_deps=Apps}, NewApps) ->
+    State#state_t{all_plugin_deps=Apps++NewApps}.
+
 update_all_deps(State=#state_t{all_deps=Apps}, NewApps) ->
     State#state_t{all_deps=Apps++NewApps}.
 

src/rebar_utils.erl

@@ -48,6 +48,7 @@
          erl_opts/1,
          indent/1,
          update_code/1,
+         remove_from_code_path/1,
          cleanup_code_path/1,
          args_to_tasks/1,
          expand_env_variable/3,
@@ -581,6 +582,22 @@ update_code(Paths) ->
                           end
                   end, Paths).
 
+remove_from_code_path(Paths) ->
+    lists:foreach(fun(Path) ->
+                          Name = filename:basename(Path, "/ebin"),
+                          App = list_to_atom(Name),
+                          application:load(App),
+                          case application:get_key(App, modules) of
+                              undefined ->
+                                  application:unload(App),
+                                  ok;
+                              {ok, Modules} ->
+                                  application:unload(App),
+                                  [begin code:purge(M), code:delete(M) end || M <- Modules]
+                          end,
+                          code:del_path(Path)
+                  end, Paths).
+
 cleanup_code_path(OrigPath) ->
     CurrentPath = code:get_path(),
     AddedPaths = CurrentPath -- OrigPath,