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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_prv_upgrade).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-include("rebar.hrl").
-define(PROVIDER, upgrade).
-define(DEPS, [lock]).
%% Also only upgrade top-level (0) deps. Transitive deps shouldn't be
%% upgradable -- if the user wants this, they should declare it at the
%% top level and then upgrade.
%% ===================================================================
%% Public API
%% ===================================================================
-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
init(State) ->
State1 =
rebar_state:add_provider(State,
providers:create([{name, ?PROVIDER},
{module, ?MODULE},
{bare, false},
{deps, ?DEPS},
{example, "rebar upgrade cowboy"},
{short_desc, "Upgrade dependency."},
{desc, ""},
{opts, [
{package, undefined, undefined, string, "Package to upgrade."}
]}])),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
{Args, _} = rebar_state:command_parsed_args(State),
Name = ec_cnv:to_binary(proplists:get_value(package, Args)),
Locks = rebar_state:lock(State),
%% TODO: optimize by running the find + unlock in one sweep
case find_app(Name, Locks) of
{AppInfo, 0} ->
%% Unlock the app and all those with a lock level higher than
%% it has
NewLocks = unlock_higher_than(0, Locks -- [AppInfo]),
{ok, rebar_state:lock(State, NewLocks)};
{_AppInfo, Level} when Level > 0 ->
{error, transitive_dependency};
false ->
{error, unknown_dependency}
end.
find_app(_Name, []) -> false;
find_app(Name, [App|Apps]) ->
case rebar_app_info:name(App) of
Name -> {App, rebar_app_info:dep_level(App)};
_ -> find_app(Name, Apps)
end.
%% Because we operate on a lock list, removing the app from the list
%% unlocks it.
unlock_higher_than(_, []) -> [];
unlock_higher_than(Level, [App | Apps]) ->
case rebar_app_info:dep_level(App) of
N when N > Level ->
unlock_higher_than(Level, Apps);
N when N =< Level ->
[App | unlock_higher_than(Level, Apps)]
end.
-spec format_error(any()) -> iolist().
format_error(Reason) ->
io_lib:format("~p", [Reason]).
|
