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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_prv_help).
-behaviour(rebar_provider).
-export([init/1,
do/1]).
-include("rebar.hrl").
-define(PROVIDER, help).
-define(DEPS, []).
%% ===================================================================
%% Public API
%% ===================================================================
-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
init(State) ->
State1 = rebar_state:add_provider(State, #provider{name = ?PROVIDER,
provider_impl = ?MODULE,
bare = false,
deps = ?DEPS,
example = "rebar help <task>",
short_desc = "Display a list of tasks or help for a given task or subtask.",
desc = "",
opts = []}),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
help(State),
{ok, State}.
%%
%% print help/usage string
%%
help(State) ->
?CONSOLE("Rebar is a tool for working with Erlang projects.~n~n", []),
OptSpecList = rebar3:option_spec_list(),
getopt:usage(OptSpecList, "rebar", "", []),
?CONSOLE("~nSeveral tasks are available:~n", []),
rebar_provider:help(State),
?CONSOLE("~nRun 'rebar help <TASK>' for details.~n~n", []).
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