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-module(rebar_packages).
-export([get_packages/1]).
-export_type([package/0]).
-include("rebar.hrl").
-type pkg_name() :: binary() | atom().
-type vsn() :: binary().
-type package() :: pkg_name() | {pkg_name(), vsn()}.
-spec get_packages(rebar_state:t()) -> {rebar_dict(), rebar_digraph()}.
get_packages(State) ->
RebarDir = rebar_utils:global_config_dir(State),
PackagesFile = filename:join(RebarDir, "packages"),
case ec_file:exists(PackagesFile) of
true ->
try
{ok, Binary} = file:read_file(PackagesFile),
{Dict, Graph} = binary_to_term(Binary),
{Dict, rebar_digraph:restore_graph(Graph)}
catch
_:_ ->
?ERROR("Bad packages index, try to fix with `rebar update`", []),
{dict:new(), digraph:new()}
end;
false ->
{dict:new(), digraph:new()}
end.
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