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98 rader
3.4 KiB
98 rader
3.4 KiB
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
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%% ex: ts=4 sw=4 et
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-module(rebar_prv_local_install).
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-behaviour(provider).
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-export([init/1,
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do/1,
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format_error/1]).
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-export([extract_escript/2]).
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-include("rebar.hrl").
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-include_lib("providers/include/providers.hrl").
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-include_lib("kernel/include/file.hrl").
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-define(PROVIDER, install).
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-define(NAMESPACE, local).
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-define(DEPS, []).
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%% ===================================================================
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%% Public API
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%% ===================================================================
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-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
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init(State) ->
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State1 =
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rebar_state:add_provider(State,
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providers:create([{name, ?PROVIDER},
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{module, ?MODULE},
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{bare, true},
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{namespace, ?NAMESPACE},
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{deps, ?DEPS},
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{example, "rebar3 unstable install"},
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{short_desc, "Extract libs from rebar3 escript along with a run script."},
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{desc, ""},
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{opts, []}])),
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{ok, State1}.
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-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
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do(State) ->
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case os:type() of
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{win32, _} ->
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?ERROR("Sorry, this feature is not yet available on Windows.", []),
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{ok, State};
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_ ->
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case rebar_state:escript_path(State) of
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undefined ->
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?INFO("Already running from an unpacked rebar3. Nothing to do...", []),
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{ok, State};
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ScriptPath ->
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extract_escript(State, ScriptPath)
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end
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end.
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-spec format_error(any()) -> iolist().
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format_error({non_writeable, Dir}) ->
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io_lib:format("Could not write to ~p. Please ensure the path is writeable.",
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[Dir]);
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format_error(Reason) ->
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io_lib:format("~p", [Reason]).
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bin_contents(OutputDir) ->
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<<"#!/usr/bin/env sh
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erl -pz ", (rebar_utils:to_binary(OutputDir))/binary,"/*/ebin +sbtu +A1 -noshell -boot start_clean -s rebar3 main $REBAR3_ERL_ARGS -extra \"$@\"
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">>.
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extract_escript(State, ScriptPath) ->
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{ok, Escript} = escript:extract(ScriptPath, []),
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{archive, Archive} = lists:keyfind(archive, 1, Escript),
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%% Extract contents of Archive to ~/.cache/rebar3/lib
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%% And add a rebar3 bin script to ~/.cache/rebar3/bin
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Opts = rebar_state:opts(State),
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OutputDir = filename:join(rebar_dir:global_cache_dir(Opts), "lib"),
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case filelib:ensure_dir(filename:join(OutputDir, "empty")) of
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ok ->
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ok;
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{error, Posix} when Posix == eaccess; Posix == enoent ->
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throw(?PRV_ERROR({non_writeable, OutputDir}))
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end,
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?INFO("Extracting rebar3 libs to ~ts...", [OutputDir]),
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zip:extract(Archive, [{cwd, OutputDir}]),
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BinDir = filename:join(rebar_dir:global_cache_dir(Opts), "bin"),
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BinFile = filename:join(BinDir, "rebar3"),
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filelib:ensure_dir(BinFile),
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?INFO("Writing rebar3 run script ~ts...", [BinFile]),
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file:write_file(BinFile, bin_contents(OutputDir)),
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ok = file:write_file_info(BinFile, #file_info{mode=33277}),
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?INFO("Add to $PATH for use: export PATH=~ts:$PATH", [BinDir]),
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{ok, State}.
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