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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_prv_local_install).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-export([extract_escript/2]).
-include("rebar.hrl").
-include_lib("kernel/include/file.hrl").
-define(PROVIDER, install).
-define(NAMESPACE, local).
-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, true},
{namespace, ?NAMESPACE},
{deps, ?DEPS},
{example, "rebar3 unstable install"},
{short_desc, "Extract libs from rebar3 escript along with a run script."},
{desc, ""},
{opts, []}])),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
case os:type() of
{win32, _} ->
?ERROR("Sorry, this feature is not yet available on Windows.", []),
{ok, State};
_ ->
case rebar_state:escript_path(State) of
undefined ->
?INFO("Already running from an unpacked rebar3. Nothing to do...", []),
{ok, State};
ScriptPath ->
extract_escript(State, ScriptPath)
end
end.
-spec format_error(any()) -> iolist().
format_error(Reason) ->
io_lib:format("~p", [Reason]).
bin_contents(OutputDir) ->
<<"#!/usr/bin/env sh
erl -pz ", (rebar_utils:to_binary(OutputDir))/binary,"/*/ebin +sbtu +A0 -noshell -boot start_clean -s rebar3 main $REBAR3_ERL_ARGS -extra \"$@\"
">>.
extract_escript(State, ScriptPath) ->
{ok, Escript} = escript:extract(ScriptPath, []),
{archive, Archive} = lists:keyfind(archive, 1, Escript),
%% Extract contents of Archive to ~/.cache/rebar3/lib
%% And add a rebar3 bin script to ~/.cache/rebar3/bin
Opts = rebar_state:opts(State),
OutputDir = filename:join(rebar_dir:global_cache_dir(Opts), "lib"),
filelib:ensure_dir(filename:join(OutputDir, "empty")),
?INFO("Extracting rebar3 libs to ~ts...", [OutputDir]),
zip:extract(Archive, [{cwd, OutputDir}]),
BinDir = filename:join(rebar_dir:global_cache_dir(Opts), "bin"),
BinFile = filename:join(BinDir, "rebar3"),
filelib:ensure_dir(BinFile),
{ok, #file_info{mode = _,
uid = Uid,
gid = Gid}} = file:read_file_info(ScriptPath),
?INFO("Writing rebar3 run script ~ts...", [BinFile]),
file:write_file(BinFile, bin_contents(OutputDir)),
ok = file:write_file_info(BinFile, #file_info{mode=33277,
uid=Uid,
gid=Gid}),
?INFO("Add to $PATH for use: export PATH=~ts:$PATH", [BinDir]),
{ok, State}.
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