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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(_) ->
ensure_app(crypto),
ensure_app(asn1),
ensure_app(public_key),
ensure_app(ssl),
inets:start(),
inets:start(httpc, [{profile, rebar}]),
set_httpc_options(),
%% Clear directories for builds since bootstrapping may require
%% a changed structure from an older one
rm_rf("_build/bootstrap"),
%% When recompiling rebar3 itself, the path swaps and cleaning
%% removes the modules in _build/bootstrap, but the VM still
%% manages to discover those in _build/prod from previous builds and
%% cause weird failures when compilers get modified between releases.
rm_rf("_build/prod"),
%% The same pattern happens with default/ as well, particularly when
%% developing new things.
%% Keep other deps in <profile>/lib for build environments like Nix
%% where internet access is disabled that deps are not downloadable.
rm_rf("_build/default/lib/rebar"),
rm_rf("_build/test/lib/rebar"),
filelib:ensure_dir("_build/bootstrap/lib/rebar/ebin/"),
os:putenv("REBAR_PROFILE", "bootstrap"),
compile_vendored(),
%% Fetch and build deps required to build rebar3
BaseDeps = [{providers, []}
,{getopt, []}
,{cf, []}
,{erlware_commons, ["ec_dictionary.erl", "ec_vsn.erl"]}
,{parse_trans, ["parse_trans.erl", "parse_trans_pp.erl",
"parse_trans_codegen.erl"]}
,{certifi, []}],
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, "3.14.3", 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", ""),
DepsPaths = rebar_state:code_paths(State, all_deps),
code:add_pathsa(DepsPaths),
rebar3:run(["clean", "-a"]),
rebar3:run(["as", "prod", "escriptize"]),
%% Done with compile, can turn back on error logger
error_logger:tty(true).
ensure_app(App) ->
case application:start(App) of
ok ->
ok;
{error, _} ->
io:format("OTP Application ~p not available. Please fix "
"your Erlang install to support it and try "
"again.~n", [App]),
halt(1)
end.
fetch_and_compile({Name, ErlFirstFiles}, Deps) ->
case lists:keyfind(Name, 1, Deps) of
{Name, Vsn} ->
ok = fetch({pkg, atom_to_binary(Name, utf8), list_to_binary(Vsn)}, Name);
{Name, _, Source} ->
ok = fetch(Source, Name)
end,
%% Hack: erlware_commons depends on a .script file to check if it is being built with
%% rebar2 or rebar3. But since rebar3 isn't built yet it can't get the vsn with get_key.
%% So we simply make sure that file is deleted before compiling
file:delete("_build/default/lib/erlware_commons/rebar.config.script"),
compile(Name, ErlFirstFiles).
fetch({pkg, Name, Vsn}, App) ->
Dir = filename:join([filename:absname("_build/default/lib/"), App]),
case filelib:is_dir(Dir) of
false ->
CDN = "https://repo.hex.pm/tarballs",
Package = binary_to_list(<<Name/binary, "-", Vsn/binary, ".tar">>),
Url = join([CDN, Package], "/"),
case request(Url) of
{ok, Binary} ->
{ok, Contents} = extract(Binary),
ok = erl_tar:extract({binary, Contents}, [{cwd, Dir}, compressed]);
{error, {Reason, _}} ->
ReasonText = re:replace(atom_to_list(Reason), "_", " ", [global,{return,list}]),
io:format("Error: Unable to fetch package ~s ~s: ~s~n", [Name, Vsn, ReasonText])
end;
true ->
io:format("Dependency ~s already exists~n", [Name])
end.
extract(Binary) ->
{ok, Files} = erl_tar:extract({binary, Binary}, [memory]),
{"contents.tar.gz", Contents} = lists:keyfind("contents.tar.gz", 1, Files),
{ok, Contents}.
request(Url) ->
HttpOptions = [{relaxed, true} | get_proxy_auth()],
case httpc:request(get, {Url, []},
HttpOptions,
[{body_format, binary}],
rebar) of
{ok, {{_Version, 200, _Reason}, _Headers, Body}} ->
{ok, Body};
Error ->
Error
end.
get_rebar_config() ->
{ok, [[Home]]} = init:get_argument(home),
ConfDir = filename:join(Home, ".config/rebar3"),
case file:consult(filename:join(ConfDir, "rebar.config")) of
{ok, Config} ->
Config;
_ ->
[]
end.
get_http_vars(Scheme) ->
OS = case os:getenv(atom_to_list(Scheme)) of
Str when is_list(Str) -> Str;
_ -> []
end,
proplists:get_value(Scheme, get_rebar_config(), OS).
set_httpc_options() ->
set_httpc_options(https_proxy, get_http_vars(https_proxy)),
set_httpc_options(proxy, get_http_vars(http_proxy)).
set_httpc_options(_, []) ->
ok;
set_httpc_options(Scheme, Proxy) ->
#{userinfo := UserInfo, host := Host, port := Port} = rebar_uri:parse(Proxy),
httpc:set_options([{Scheme, {{Host, Port}, []}}], rebar),
proxy_ipfamily(Host, inet:gethostbyname(Host)),
set_proxy_auth(UserInfo).
proxy_ipfamily(_Host, {ok, _}) ->
ok;
proxy_ipfamily(Host, {error, nxdomain}) ->
maybe_proxy_family(Host, inet_db:res_option(inet6)).
maybe_proxy_family(Host, true) ->
maybe_set_ipfamily(inet:gethostbyname(Host, inet), inet);
maybe_proxy_family(Host, false) ->
maybe_set_ipfamily(inet:gethostbyname(Host, inet6), inet6).
maybe_set_ipfamily({ok, _}, Family) ->
httpc:set_options([{ipfamily, Family}], rebar);
maybe_set_ipfamily(_, _Family) ->
ok.
compile_vendored() ->
compile_xrl_file("src/vendored/r3_safe_erl_term.xrl"),
Sources = filelib:wildcard(filename:join(["src/vendored", "*.erl"])),
OutDir = filename:absname("_build/bootstrap/lib/rebar/ebin"),
code:add_patha(OutDir),
Opts = [debug_info,{outdir, OutDir}, return | additional_defines()],
[compile_erl_file(X, Opts) || X <- Sources].
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],
LeexFiles = filelib:wildcard(filename:join([Dir, "src", "*.xrl"])),
[compile_xrl_file(X) || X <- LeexFiles],
YeccFiles = filelib:wildcard(filename:join([Dir, "src", "*.yrl"])),
[compile_yrl_file(X) || X <- YeccFiles],
Sources = FirstFilesPaths ++ filelib:wildcard(filename:join([Dir, "src", "*.erl"])),
[compile_erl_file(X, [{i, filename:join(Dir, "include")}
,debug_info
,{outdir, filename:join(Dir, "ebin")}
,return | additional_defines()]) || X <- Sources].
compile_xrl_file(File) ->
{ok, _} = leex:file(File).
compile_yrl_file(File) ->
{ok, _} = yecc:file(File).
compile_erl_file(File, Opts) ->
case compile:file(File, Opts) of
{ok, _Mod} ->
ok;
{ok, _Mod, []} ->
ok;
{ok, _Mod, Ws} ->
io:format("~s~n", [format_warnings(File, Ws)]),
case lists:member(warnings_as_errors, Opts) of
true -> halt(1);
false -> ok
end;
{error, Es, Ws} ->
io:format("~s ~s~n", [format_errors(File, Es), format_warnings(File, Ws)]),
halt(1)
end.
bootstrap_rebar3() ->
filelib:ensure_dir("_build/default/lib/rebar/ebin/dummy.beam"),
code:add_path("_build/default/lib/rebar/ebin/"),
Res = symlink_or_copy(filename:absname("src"),
filename:absname("_build/default/lib/rebar/src")),
true = Res == ok orelse Res == exists,
Sources = ["src/rebar_resource_v2.erl", "src/rebar_resource.erl" | filelib:wildcard("src/*.erl") ],
[compile_erl_file(X, [{outdir, "_build/default/lib/rebar/ebin/"}
,return | additional_defines()]) || X <- Sources],
code:add_patha(filename:absname("_build/default/lib/rebar/ebin")).
%%rebar.hrl
-define(FMT(Str, Args), lists:flatten(io_lib:format(Str, Args))).
%%/rebar.hrl
%%rebar_file_utils
-include_lib("kernel/include/file.hrl").
symlink_or_copy(Source, Target) ->
Link = case os:type() of
{win32, _} ->
Source;
_ ->
make_relative_path(Source, Target)
end,
case file:make_symlink(Link, Target) of
ok ->
ok;
{error, eexist} ->
exists;
{error, _} ->
case os:type() of
{win32, _} ->
S = unicode:characters_to_list(Source),
T = unicode:characters_to_list(Target),
case filelib:is_dir(S) of
true ->
win32_symlink_or_copy(S, T);
false ->
cp_r([S], T)
end;
_ ->
case filelib:is_dir(Target) of
true ->
ok;
false ->
cp_r([Source], Target)
end
end
end.
-spec rm_rf(string()) -> 'ok'.
rm_rf(Target) ->
case os:type() of
{unix, _} ->
EscTarget = escape_chars(Target),
{ok, []} = sh(?FMT("rm -rf ~ts", [EscTarget]),
[{use_stdout, false}, abort_on_error]),
ok;
{win32, _} ->
Filelist = filelib:wildcard(Target),
Dirs = [F || F <- Filelist, filelib:is_dir(F)],
Files = Filelist -- Dirs,
ok = delete_each(Files),
ok = delete_each_dir_win32(Dirs),
ok
end.
-spec cp_r(list(string()), file:filename()) -> 'ok'.
cp_r([], _Dest) ->
ok;
cp_r(Sources, Dest) ->
case os:type() of
{unix, _} ->
EscSources = [escape_chars(Src) || Src <- Sources],
SourceStr = join(EscSources, " "),
{ok, []} = sh(?FMT("cp -Rp ~ts \"~ts\"",
[SourceStr, escape_double_quotes(Dest)]),
[{use_stdout, false}, abort_on_error]),
ok;
{win32, _} ->
lists:foreach(fun(Src) -> ok = cp_r_win32(Src,Dest) end, Sources),
ok
end.
%% @private Compatibility function for windows
win32_symlink_or_copy(Source, Target) ->
Res = sh(?FMT("cmd /c mklink /j \"~ts\" \"~ts\"",
[escape_double_quotes(filename:nativename(Target)),
escape_double_quotes(filename:nativename(Source))]),
[{use_stdout, false}, return_on_error]),
case win32_mklink_ok(Res, Target) of
true -> ok;
false -> cp_r_win32(Source, drop_last_dir_from_path(Target))
end.
cp_r_win32({true, SourceDir}, {true, DestDir}) ->
%% from directory to directory
ok = case file:make_dir(DestDir) of
{error, eexist} -> ok;
Other -> Other
end,
ok = xcopy_win32(SourceDir, DestDir);
cp_r_win32({false, Source} = S,{true, DestDir}) ->
%% from file to directory
cp_r_win32(S, {false, filename:join(DestDir, filename:basename(Source))});
cp_r_win32({false, Source},{false, Dest}) ->
%% from file to file
{ok,_} = file:copy(Source, Dest),
ok;
cp_r_win32({true, SourceDir}, {false, DestDir}) ->
case filelib:is_regular(DestDir) of
true ->
%% From directory to file? This shouldn't happen
{error, lists:flatten(
io_lib:format("Cannot copy dir (~p) to file (~p)\n",
[SourceDir, DestDir]))};
false ->
%% Specifying a target directory that doesn't currently exist.
%% So let's attempt to create this directory
case filelib:ensure_dir(filename:join(DestDir, "dummy")) of
ok ->
ok = xcopy_win32(SourceDir, DestDir);
{error, Reason} ->
{error, lists:flatten(
io_lib:format("Unable to create dir ~p: ~p\n",
[DestDir, Reason]))}
end
end;
cp_r_win32(Source,Dest) ->
Dst = {filelib:is_dir(Dest), Dest},
lists:foreach(fun(Src) ->
ok = cp_r_win32({filelib:is_dir(Src), Src}, Dst)
end, filelib:wildcard(Source)),
ok.
%% drops the last 'node' of the filename, presumably the last dir such as 'src'
%% this is because cp_r_win32/2 automatically adds the dir name, to appease
%% robocopy and be more uniform with POSIX
drop_last_dir_from_path([]) ->
[];
drop_last_dir_from_path(Path) ->
case lists:droplast(filename:split(Path)) of
[] -> [];
Dirs -> filename:join(Dirs)
end.
%% @private specifically pattern match against the output
%% of the windows 'mklink' shell call; different values from
%% what win32_ok/1 handles
win32_mklink_ok({ok, _}, _) ->
true;
win32_mklink_ok({error,{1,"Local NTFS volumes are required to complete the operation.\n"}}, _) ->
false;
win32_mklink_ok({error,{1,"Cannot create a file when that file already exists.\n"}}, Target) ->
% File or dir is already in place; find if it is already a symlink (true) or
% if it is a directory (copy-required; false)
is_symlink(Target);
win32_mklink_ok(_, _) ->
false.
xcopy_win32(Source,Dest)->
%% "xcopy \"~ts\" \"~ts\" /q /y /e 2> nul", Changed to robocopy to
%% handle long names. May have issues with older windows.
Cmd = case filelib:is_dir(Source) of
true ->
%% For robocopy, copying /a/b/c/ to /d/e/f/ recursively does not
%% create /d/e/f/c/*, but rather copies all files to /d/e/f/*.
%% The usage we make here expects the former, not the later, so we
%% must manually add the last fragment of a directory to the `Dest`
%% in order to properly replicate POSIX platforms
NewDest = filename:join([Dest, filename:basename(Source)]),
?FMT("robocopy \"~ts\" \"~ts\" /e 1> nul",
[escape_double_quotes(filename:nativename(Source)),
escape_double_quotes(filename:nativename(NewDest))]);
false ->
?FMT("robocopy \"~ts\" \"~ts\" \"~ts\" /e 1> nul",
[escape_double_quotes(filename:nativename(filename:dirname(Source))),
escape_double_quotes(filename:nativename(Dest)),
escape_double_quotes(filename:basename(Source))])
end,
Res = sh(Cmd, [{use_stdout, false}, return_on_error]),
case win32_ok(Res) of
true -> ok;
false ->
{error, lists:flatten(
io_lib:format("Failed to copy ~ts to ~ts~n",
[Source, Dest]))}
end.
is_symlink(Filename) ->
{ok, Info} = file:read_link_info(Filename),
Info#file_info.type == symlink.
win32_ok({ok, _}) -> true;
win32_ok({error, {Rc, _}}) when Rc<9; Rc=:=16 -> true;
win32_ok(_) -> false.
%% @private windows rm_rf helpers
delete_each([]) ->
ok;
delete_each([File | Rest]) ->
case file:delete(File) of
ok ->
delete_each(Rest);
{error, enoent} ->
delete_each(Rest);
{error, Reason} ->
io:format("Failed to delete file ~ts: ~p\n", [File, Reason]),
error
end.
delete_each_dir_win32([]) -> ok;
delete_each_dir_win32([Dir | Rest]) ->
{ok, []} = sh(?FMT("rd /q /s \"~ts\"",
[escape_double_quotes(filename:nativename(Dir))]),
[{use_stdout, false}, return_on_error]),
delete_each_dir_win32(Rest).
%%/rebar_file_utils
%%rebar_utils
%% escape\ as\ a\ shell\?
escape_chars(Str) when is_atom(Str) ->
escape_chars(atom_to_list(Str));
escape_chars(Str) ->
re:replace(Str, "([ ()?`!$&;\"\'])", "\\\\&",
[global, {return, list}, unicode]).
%% "escape inside these"
escape_double_quotes(Str) ->
re:replace(Str, "([\"\\\\`!$&*;])", "\\\\&",
[global, {return, list}, unicode]).
sh(Command0, Options0) ->
DefaultOptions = [{use_stdout, false}],
Options = [expand_sh_flag(V)
|| V <- proplists:compact(Options0 ++ DefaultOptions)],
ErrorHandler = proplists:get_value(error_handler, Options),
OutputHandler = proplists:get_value(output_handler, Options),
Command = lists:flatten(patch_on_windows(Command0, proplists:get_value(env, Options, []))),
PortSettings = proplists:get_all_values(port_settings, Options) ++
[exit_status, {line, 16384}, use_stdio, stderr_to_stdout, hide, eof],
Port = open_port({spawn, Command}, PortSettings),
try
case sh_loop(Port, OutputHandler, []) of
{ok, _Output} = Ok ->
Ok;
{error, {_Rc, _Output}=Err} ->
ErrorHandler(Command, Err)
end
after
port_close(Port)
end.
sh_loop(Port, Fun, Acc) ->
receive
{Port, {data, {eol, Line}}} ->
sh_loop(Port, Fun, Fun(Line ++ "\n", Acc));
{Port, {data, {noeol, Line}}} ->
sh_loop(Port, Fun, Fun(Line, Acc));
{Port, eof} ->
Data = lists:flatten(lists:reverse(Acc)),
receive
{Port, {exit_status, 0}} ->
{ok, Data};
{Port, {exit_status, Rc}} ->
{error, {Rc, Data}}
end
end.
expand_sh_flag(return_on_error) ->
{error_handler,
fun(_Command, Err) ->
{error, Err}
end};
expand_sh_flag(abort_on_error) ->
{error_handler,
%% moved log_and_abort/2 here because some versions somehow had trouble
%% interpreting it and thought `fun log_and_abort/2' was in `erl_eval'
fun(Command, {Rc, Output}) ->
io:format("sh(~ts)~n"
"failed with return code ~w and the following output:~n"
"~ts", [Command, Rc, Output]),
throw(bootstrap_abort)
end};
expand_sh_flag({use_stdout, false}) ->
{output_handler,
fun(Line, Acc) ->
[Line | Acc]
end};
expand_sh_flag({cd, _CdArg} = Cd) ->
{port_settings, Cd};
expand_sh_flag({env, _EnvArg} = Env) ->
{port_settings, Env}.
%% We do the shell variable substitution ourselves on Windows and hope that the
%% command doesn't use any other shell magic.
patch_on_windows(Cmd, Env) ->
case os:type() of
{win32,nt} ->
Cmd1 = "cmd /q /c "
++ lists:foldl(fun({Key, Value}, Acc) ->
expand_env_variable(Acc, Key, Value)
end, Cmd, Env),
%% Remove left-over vars
re:replace(Cmd1, "\\\$\\w+|\\\${\\w+}", "",
[global, {return, list}, unicode]);
_ ->
Cmd
end.
%% @doc Given env. variable `FOO' we want to expand all references to
%% it in `InStr'. References can have two forms: `$FOO' and `${FOO}'
%% The end of form `$FOO' is delimited with whitespace or EOL
-spec expand_env_variable(string(), string(), term()) -> string().
expand_env_variable(InStr, VarName, RawVarValue) ->
case chr(InStr, $$) of
0 ->
%% No variables to expand
InStr;
_ ->
ReOpts = [global, unicode, {return, list}],
VarValue = re:replace(RawVarValue, "\\\\", "\\\\\\\\", ReOpts),
%% Use a regex to match/replace:
%% Given variable "FOO": match $FOO\s | $FOOeol | ${FOO}
RegEx = io_lib:format("\\\$(~ts(\\W|$)|{~ts})", [VarName, VarName]),
re:replace(InStr, RegEx, [VarValue, "\\2"], ReOpts)
end.
%%/rebar_utils
%%rebar_dir
make_relative_path(Source, Target) ->
AbsSource = make_normalized_path(Source),
AbsTarget = make_normalized_path(Target),
do_make_relative_path(filename:split(AbsSource), filename:split(AbsTarget)).
%% @private based on fragments of paths, replace the number of common
%% segments by `../' bits, and add the rest of the source alone after it
-spec do_make_relative_path([string()], [string()]) -> file:filename().
do_make_relative_path([H|T1], [H|T2]) ->
do_make_relative_path(T1, T2);
do_make_relative_path(Source, Target) ->
Base = lists:duplicate(max(length(Target) - 1, 0), ".."),
filename:join(Base ++ Source).
make_normalized_path(Path) ->
AbsPath = make_absolute_path(Path),
Components = filename:split(AbsPath),
make_normalized_path(Components, []).
make_absolute_path(Path) ->
case filename:pathtype(Path) of
absolute ->
Path;
relative ->
{ok, Dir} = file:get_cwd(),
filename:join([Dir, Path]);
volumerelative ->
Volume = hd(filename:split(Path)),
{ok, Dir} = file:get_cwd(Volume),
filename:join([Dir, Path])
end.
-spec make_normalized_path([string()], [string()]) -> file:filename().
make_normalized_path([], NormalizedPath) ->
filename:join(lists:reverse(NormalizedPath));
make_normalized_path([H|T], NormalizedPath) ->
case H of
"." when NormalizedPath == [], T == [] -> make_normalized_path(T, ["."]);
"." -> make_normalized_path(T, NormalizedPath);
".." when NormalizedPath == [] -> make_normalized_path(T, [".."]);
".." when hd(NormalizedPath) =/= ".." -> make_normalized_path(T, tl(NormalizedPath));
_ -> make_normalized_path(T, [H|NormalizedPath])
end.
%%/rebar_dir
setup_env() ->
%% We don't need or want relx providers loaded yet
application:load(rebar),
{ok, Providers} = application:get_env(rebar, providers),
Providers1 = Providers -- [rebar_prv_release,
rebar_prv_relup,
rebar_prv_tar],
application:set_env(rebar, providers, Providers1).
reset_env() ->
%% Reset the env so we get all providers
application:unset_env(rebar, providers),
application:unload(rebar),
application:load(rebar).
get_deps() ->
case file:consult("rebar.lock") of
{ok, [[]]} ->
%% Something went wrong in a previous build, lock file shouldn't be empty
io:format("Empty list in lock file, deleting rebar.lock~n"),
ok = file:delete("rebar.lock"),
{ok, Config} = file:consult("rebar.config"),
proplists:get_value(deps, Config);
{ok, [Deps]} ->
[{binary_to_atom(Name, utf8), "", Source} || {Name, Source, _Level} <- Deps];
_ ->
{ok, Config} = file:consult("rebar.config"),
proplists:get_value(deps, Config)
end.
format_errors(Source, Errors) ->
format_errors(Source, "", Errors).
format_warnings(Source, Warnings) ->
format_warnings(Source, Warnings, []).
format_warnings(Source, Warnings, Opts) ->
Prefix = case lists:member(warnings_as_errors, Opts) of
true -> "";
false -> "Warning: "
end,
format_errors(Source, Prefix, Warnings).
format_errors(_MainSource, Extra, Errors) ->
[begin
[format_error(Source, Extra, Desc) || Desc <- Descs]
end
|| {Source, Descs} <- Errors].
format_error(AbsSource, Extra, {{Line, Column}, Mod, Desc}) ->
ErrorDesc = Mod:format_error(Desc),
io_lib:format("~s:~w:~w: ~s~s~n", [AbsSource, Line, Column, Extra, ErrorDesc]);
format_error(AbsSource, Extra, {Line, Mod, Desc}) ->
ErrorDesc = Mod:format_error(Desc),
io_lib:format("~s:~w: ~s~s~n", [AbsSource, Line, Extra, ErrorDesc]);
format_error(AbsSource, Extra, {Mod, Desc}) ->
ErrorDesc = Mod:format_error(Desc),
io_lib:format("~s: ~s~s~n", [AbsSource, Extra, ErrorDesc]).
additional_defines() ->
[{d, D} || {Re, D} <- [{"^[0-9]+", namespaced_types},
{"^18", no_maps_update_with},
{"^R1[4|5]", deprecated_crypto},
{"^2", unicode_str},
{"^(R|1|20)", fun_stacktrace},
{"^((1[8|9])|2)", rand_module}],
is_otp_release(Re)].
is_otp_release(ArchRegex) ->
case re:run(otp_release(), ArchRegex, [{capture, none}]) of
match ->
true;
nomatch ->
false
end.
otp_release() ->
otp_release1(erlang:system_info(otp_release)).
%% If OTP <= R16, otp_release is already what we want.
otp_release1([$R,N|_]=Rel) when is_integer(N) ->
Rel;
%% If OTP >= 17.x, erlang:system_info(otp_release) returns just the
%% major version number, we have to read the full version from
%% a file. See http://www.erlang.org/doc/system_principles/versions.html
%% Read vsn string from the 'OTP_VERSION' file and return as list without
%% the "\n".
otp_release1(Rel) ->
File = filename:join([code:root_dir(), "releases", Rel, "OTP_VERSION"]),
case file:read_file(File) of
{error, _} ->
Rel;
{ok, Vsn} ->
%% It's fine to rely on the binary module here because we can
%% be sure that it's available when the otp_release string does
%% not begin with $R.
Size = byte_size(Vsn),
%% The shortest vsn string consists of at least two digits
%% followed by "\n". Therefore, it's safe to assume Size >= 3.
case binary:part(Vsn, {Size, -3}) of
<<"**\n">> ->
%% The OTP documentation mentions that a system patched
%% using the otp_patch_apply tool available to licensed
%% customers will leave a '**' suffix in the version as a
%% flag saying the system consists of application versions
%% from multiple OTP versions. We ignore this flag and
%% drop the suffix, given for all intents and purposes, we
%% cannot obtain relevant information from it as far as
%% tooling is concerned.
binary:bin_to_list(Vsn, {0, Size - 3});
_ ->
binary:bin_to_list(Vsn, {0, Size - 1})
end
end.
set_proxy_auth([]) ->
ok;
set_proxy_auth(UserInfo) ->
[Username, Password] = re:split(UserInfo, ":",
[{return, list}, {parts,2}, unicode]),
%% password may contain url encoded characters, need to decode them first
put(proxy_auth, [{proxy_auth, {Username, rebar_uri:percent_decode(Password)}}]).
get_proxy_auth() ->
case get(proxy_auth) of
undefined -> [];
ProxyAuth -> ProxyAuth
end.
%% string:join/2 copy; string:join/2 is getting obsoleted
%% and replaced by lists:join/2, but lists:join/2 is too new
%% for version support (only appeared in 19.0) so it cannot be
%% used. Instead we just adopt join/2 locally and hope it works
%% for most unicode use cases anyway.
join([], Sep) when is_list(Sep) ->
[];
join([H|T], Sep) ->
H ++ lists:append([Sep ++ X || X <- T]).
%% Same for chr; no non-deprecated equivalent in OTP20+
chr(S, C) when is_integer(C) -> chr(S, C, 1).
chr([C|_Cs], C, I) -> I;
chr([_|Cs], C, I) -> chr(Cs, C, I+1);
chr([], _C, _I) -> 0.