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#!/usr/bin/env escript
%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ft=erlang ts=4 sw=4 et
main(_Args) ->
%% Fetch and build deps required to build rebar3
BaseDeps = [{providers, []}
,{getopt, []}
,{erlware_commons, ["ec_dictionary.erl", "ec_vsn.erl"]}],
Deps = get_deps(),
[fetch_and_compile(Dep, Deps) || Dep <- BaseDeps],
%% Build rebar3 modules with compile:file
bootstrap_rebar3(),
%% Build rebar.app from rebar.app.src
{ok, App} = rebar_app_info:new(rebar, "3.0.0", filename:absname("_build/default/lib/rebar/")),
rebar_otp_app:compile(rebar_state:new(), App),
%% Because we are compiling files that are loaded already we want to silence
%% not_purged errors in rebar_erlc_compiler:opts_changed/1
error_logger:tty(false),
setup_env(),
os:putenv("REBAR_PROFILE", "bootstrap"),
{ok, State} = rebar3:run(["compile"]),
reset_env(),
os:putenv("REBAR_PROFILE", ""),
%% Build erlydtl files (a hook on compile in the default profile) and escript file
DepsPaths = rebar_state:code_paths(State, all_deps),
code:add_pathsa(DepsPaths),
rebar3:run(["clean", "-a"]),
rebar3:run(["escriptize"]),
%% Done with compile, can turn back on error logger
error_logger:tty(true),
%% Finally, update executable perms for our script on *nix,
%% or write out script files on win32.
ec_file:copy("_build/default/bin/rebar3", "./rebar3"),
case os:type() of
{unix,_} ->
[] = os:cmd("chmod u+x rebar3"),
ok;
{win32,_} ->
write_windows_scripts(),
ok;
_ ->
ok
end.
fetch_and_compile({Name, ErlFirstFiles}, Deps) ->
{Name, _, Repo} = lists:keyfind(Name, 1, Deps),
ok = fetch(Repo, Name),
compile(Name, ErlFirstFiles).
fetch({git, Url, Source}, App) ->
Dir = filename:join([filename:absname("_build/default/lib/"), App]),
case filelib:is_dir(Dir) of
true ->
true = code:add_path(filename:join(Dir, "ebin")),
ok;
false ->
fetch_source(Dir, Url, Source),
ok
end.
fetch_source(Dir, Url, {ref, Ref}) ->
ok = filelib:ensure_dir(Dir),
os:cmd(io_lib:format("git clone ~s ~s", [Url, Dir])),
{ok, Cwd} = file:get_cwd(),
file:set_cwd(Dir),
os:cmd(io_lib:format("git checkout -q ~s", [Ref])),
file:set_cwd(Cwd);
fetch_source(Dir, Url, {_, Branch}) ->
ok = filelib:ensure_dir(Dir),
os:cmd(io_lib:format("git clone ~s ~s -b ~s --single-branch",
[Url, Dir, Branch])).
compile(App, FirstFiles) ->
Dir = filename:join(filename:absname("_build/default/lib/"), App),
filelib:ensure_dir(filename:join([Dir, "ebin", "dummy.beam"])),
code:add_path(filename:join(Dir, "ebin")),
FirstFilesPaths = [filename:join([Dir, "src", Module]) || Module <- FirstFiles],
Sources = FirstFilesPaths ++ filelib:wildcard(filename:join([Dir, "src", "*.erl"])),
[compile:file(X, [{i, filename:join(Dir, "include")}
,{outdir, filename:join(Dir, "ebin")}
,return]) || X <- Sources].
bootstrap_rebar3() ->
filelib:ensure_dir("_build/default/lib/rebar/ebin/dummy.beam"),
file:make_symlink(filename:absname("src"), filename:absname("_build/default/lib/rebar/src")),
Sources = filelib:wildcard("src/*.erl"),
[compile:file(X, [{outdir, "_build/default/lib/rebar/ebin/"}]) || X <- Sources],
code:add_path(filename:absname("_build/default/lib/rebar/ebin")).
setup_env() ->
%% We don't need or want erlydtl or relx providers loaded yet
application:load(rebar),
{ok, Providers} = application:get_env(rebar, providers),
Providers1 = Providers -- [rebar_prv_erlydtl_compiler,
rebar_prv_release,
rebar_prv_tar],
application:set_env(rebar, providers, Providers1).
reset_env() ->
%% Reset the env so we get all providers and can build erlydtl files
application:unset_env(rebar, providers),
application:unload(rebar),
application:load(rebar).
write_windows_scripts() ->
CmdScript=
"@echo off\r\n"
"setlocal\r\n"
"set rebarscript=%~f0\r\n"
"escript.exe \"%rebarscript:.cmd=%\" %*\r\n",
ok = file:write_file("rebar3.cmd", CmdScript).
get_deps() ->
case file:consult("rebar.lock") of
{ok, [Deps]} ->
[{binary_to_atom(Name, utf8), "", Source} || {Name, Source, _Level} <- Deps];
_ ->
{ok, Config} = file:consult("rebar.config"),
proplists:get_value(deps, Config)
end.
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