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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_prv_update).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-include("rebar.hrl").
-define(PROVIDER, update).
-define(DEPS, []).
%% ===================================================================
%% 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 update"},
{short_desc, "Update package index."},
{desc, ""},
{opts, []}])),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
?INFO("Updating package index...", []),
try
Url = url(State),
TmpDir = ec_file:insecure_mkdtemp(),
TmpFile = filename:join(TmpDir, "packages"),
Home = rebar_dir:home_dir(),
PackagesFile = filename:join([Home, ?CONFIG_DIR, "packages"]),
filelib:ensure_dir(PackagesFile),
{ok, _RequestId} = httpc:request(get, {Url, [{"Accept", "application/erlang"}]},
[], [{stream, TmpFile}, {sync, true}]),
ok = ec_file:copy(TmpFile, PackagesFile)
catch
_:_ ->
{error, {?MODULE, package_index_write}}
end,
{ok, State}.
-spec format_error(any()) -> iolist().
format_error(package_index_write) ->
"Failed to write package index.".
url(State) ->
ErtsVsn = erlang:system_info(version),
Qs = [io_lib:format("~s=~s", [X, Y]) || {X, Y} <- [{"erts", ErtsVsn}]],
Url = rebar_state:get(State, rebar_packages_url, "http://packages.rebar3.org/packages"),
Url ++ "?" ++ string:join(Qs, "&").
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