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-module(rebar_prv_packages).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-include("rebar.hrl").
-include_lib("stdlib/include/ms_transform.hrl").
-include_lib("providers/include/providers.hrl").
-define(PROVIDER, pkgs).
-define(DEPS, []).
-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
init(State) ->
State1 = rebar_state:add_provider(State, providers:create([{name, ?PROVIDER},
{module, ?MODULE},
{bare, true},
{deps, ?DEPS},
{example, "rebar3 pkgs"},
{short_desc, "List available packages."},
{desc, info("List available packages")},
{opts, []}])),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
case rebar_packages:get_packages(State) of
{Dict, _} ->
print_packages(Dict),
{ok, State};
error ->
?PRV_ERROR(load_registry_fail)
end.
-spec format_error(any()) -> iolist().
format_error(load_registry_fail) ->
"Failed to load package regsitry. Try running 'rebar3 update' to fix".
print_packages(Dict) ->
Pkgs = lists:keysort(1, dict:fetch_keys(Dict)),
SortedPkgs = lists:foldl(fun({Pkg, Vsn}, Acc) ->
orddict:append_list(Pkg, [Vsn], Acc)
end, orddict:new(), Pkgs),
orddict:map(fun(Name, Vsns) ->
VsnStr = join(Vsns, <<", ">>),
io:format("~s:~n Versions: ~s~n~n", [Name, VsnStr])
end, SortedPkgs).
-spec join([binary()], binary()) -> binary().
join([Bin], _Sep) ->
<<Bin/binary>>;
join([Bin | T], Sep) ->
<<Bin/binary, Sep/binary, (join(T, Sep))/binary>>.
info(Description) ->
io_lib:format("~s.~n", [Description]).
|
