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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_plugins).
-export([install/1]).
-include("rebar.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
install(State) ->
%% Set deps_dir to a different dir for plugin so they don't collide
OldDepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
State1 = rebar_state:set(State, deps_dir, ?DEFAULT_PLUGINS_DIR),
DepsDir = rebar_dir:deps_dir(State1),
expand_plugins(DepsDir),
Plugins = rebar_state:get(State1, plugins, []),
PluginProviders = lists:flatten(rebar_utils:filtermap(fun(Plugin) ->
handle_plugin(Plugin, State1)
end, Plugins)),
State2 = rebar_state:set(State1, deps_dir, OldDepsDir),
{ok, PluginProviders, State2}.
-spec handle_plugin(rebar_prv_install_deps:dep(), rebar_state:t()) -> {true, any()} | false.
handle_plugin(Plugin, State) ->
try
{ok, _, State1} = rebar_prv_install_deps:handle_deps(default, State, [Plugin]),
Apps = rebar_state:all_deps(State1),
ToBuild = lists:dropwhile(fun rebar_app_info:valid/1, Apps),
[build_plugin(AppInfo) || AppInfo <- ToBuild],
plugin_providers(Plugin)
catch
C:T ->
?DEBUG("~p ~p", [C, T]),
?WARN("Plugin ~p not available. It will not be used.~n", [Plugin]),
false
end.
build_plugin(AppInfo) ->
AppDir = rebar_app_info:dir(AppInfo),
C = rebar_config:consult(AppDir),
S = rebar_state:new(rebar_state:new(), C, AppDir),
rebar_prv_compile:compile(S, AppInfo),
true = code:add_patha(filename:join(AppDir, "ebin")).
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) ->
validate_plugin(Plugin).
validate_plugin(Plugin) ->
ok = application:load(Plugin),
case application:get_env(Plugin, providers) of
{ok, Providers} ->
{true, Providers};
undefined ->
Exports = sets:from_list(Plugin:module_info(exports)),
Required = sets:from_list([{init,1},
{do,1},
{format_error,1}]),
case sets:is_subset(Required, Exports) of
false ->
?WARN("Plugin ~p is not a provider. It will not be used.~n", [Plugin]),
false;
true ->
{true, Plugin}
end
end.
expand_plugins(Dir) ->
Apps = filelib:wildcard(filename:join([Dir, "*", "ebin"])),
ok = code:add_pathsa(Apps).
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