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rebar_rel_utils.erl
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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com)
%%
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%%
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%%
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
%% -------------------------------------------------------------------
-module(rebar_rel_utils).
-export([is_rel_dir/0,
is_rel_dir/1,
get_reltool_release_info/1,
get_rel_release_info/1,
get_rel_release_info/2,
get_rel_apps/1,
get_rel_apps/2,
get_previous_release_path/1,
get_rel_file_path/2,
load_config/2,
get_sys_tuple/1,
get_target_dir/2,
get_root_dir/2,
get_target_parent_dir/2]).
-include("rebar.hrl").
is_rel_dir() ->
is_rel_dir(rebar_utils:get_cwd()).
is_rel_dir(Dir) ->
Fname = filename:join([Dir, "reltool.config"]),
Scriptname = Fname ++ ".script",
Res = case filelib:is_regular(Scriptname) of
true ->
{true, Scriptname};
false ->
case filelib:is_regular(Fname) of
true ->
{true, Fname};
false ->
false
end
end,
?DEBUG("is_rel_dir(~s) -> ~p~n", [Dir, Res]),
Res.
%% Get release name and version from a reltool.config
get_reltool_release_info([{sys, Config}| _]) ->
{rel, Name, Ver, _} = proplists:lookup(rel, Config),
{Name, Ver};
get_reltool_release_info(ReltoolFile) when is_list(ReltoolFile) ->
case file:consult(ReltoolFile) of
{ok, ReltoolConfig} ->
get_reltool_release_info(ReltoolConfig);
_ ->
?ABORT("Failed to parse ~s~n", [ReltoolFile])
end.
%% Get release name and version from a rel file
get_rel_release_info(RelFile) ->
case file:consult(RelFile) of
{ok, [{release, {Name, Ver}, _, _}]} ->
{Name, Ver};
_ ->
?ABORT("Failed to parse ~s~n", [RelFile])
end.
%% Get release name and version from a name and a path
get_rel_release_info(Name, Path) ->
RelPath = get_rel_file_path(Name, Path),
get_rel_release_info(RelPath).
%% Get list of apps included in a release from a rel file
get_rel_apps(RelFile) ->
case file:consult(RelFile) of
{ok, [{release, _, _, Apps}]} ->
make_proplist(Apps, []);
_ ->
?ABORT("Failed to parse ~s~n", [RelFile])
end.
%% Get list of apps included in a release from a name and a path
get_rel_apps(Name, Path) ->
RelPath = get_rel_file_path(Name, Path),
get_rel_apps(RelPath).
%% Get rel file path from name and path
get_rel_file_path(Name, Path) ->
[RelFile] = filelib:wildcard(filename:join([Path, "releases", "*",
Name ++ ".rel"])),
RelFile.
%% Get the previous release path from a global variable
get_previous_release_path(Config) ->
case rebar_config:get_global(Config, previous_release, false) of
false ->
?ABORT("previous_release=PATH is required to "
"create upgrade package~n", []);
OldVerPath ->
OldVerPath
end.
%%
%% Load terms from reltool.config
%%
load_config(Config, ReltoolFile) ->
case rebar_config:consult_file(ReltoolFile) of
{ok, Terms} ->
expand_version(Config, Terms, filename:dirname(ReltoolFile));
Other ->
?ABORT("Failed to load expected config from ~s: ~p\n",
[ReltoolFile, Other])
end.
%%
%% Look for the {sys, [...]} tuple in the reltool.config file.
%% Without this present, we can't run reltool.
%%
get_sys_tuple(ReltoolConfig) ->
case lists:keyfind(sys, 1, ReltoolConfig) of
{sys, _} = SysTuple ->
SysTuple;
false ->
?ABORT("Failed to find {sys, [...]} tuple in reltool.config.", [])
end.
%%
%% Look for {target_dir, TargetDir} in the reltool config file; if none is
%% found, use the name of the release as the default target directory.
%%
get_target_dir(Config, ReltoolConfig) ->
case rebar_config:get_global(Config, target_dir, undefined) of
undefined ->
case lists:keyfind(target_dir, 1, ReltoolConfig) of
{target_dir, TargetDir} ->
filename:absname(TargetDir);
false ->
{sys, SysInfo} = get_sys_tuple(ReltoolConfig),
case lists:keyfind(rel, 1, SysInfo) of
{rel, Name, _Vsn, _Apps} ->
filename:absname(Name);
false ->
filename:absname("target")
end
end;
TargetDir ->
filename:absname(TargetDir)
end.
get_target_parent_dir(Config, ReltoolConfig) ->
TargetDir = get_target_dir(Config, ReltoolConfig),
case lists:reverse(tl(lists:reverse(filename:split(TargetDir)))) of
[] -> ".";
Components -> filename:join(Components)
end.
%%
%% Look for root_dir in sys tuple and command line; fall back to
%% code:root_dir().
%%
get_root_dir(Config, ReltoolConfig) ->
{sys, SysInfo} = get_sys_tuple(ReltoolConfig),
SysRootDirTuple = lists:keyfind(root_dir, 1, SysInfo),
CmdRootDir = rebar_config:get_global(Config, root_dir, undefined),
case {SysRootDirTuple, CmdRootDir} of
%% root_dir in sys typle and no root_dir on cmd-line
{{root_dir, SysRootDir}, undefined} ->
SysRootDir;
%% root_dir in sys typle and also root_dir on cmd-line
{{root_dir, SysRootDir}, CmdRootDir} when CmdRootDir =/= undefined ->
case string:equal(SysRootDir, CmdRootDir) of
true ->
ok;
false ->
?WARN("overriding reltool.config root_dir with "
"different command line root_dir~n", [])
end,
CmdRootDir;
%% no root_dir in sys typle and no root_dir on cmd-line
{false, undefined} ->
code:root_dir();
%% no root_dir in sys tuple but root_dir on cmd-line
{false, CmdRootDir} when CmdRootDir =/= undefined ->
CmdRootDir
end.
%% ===================================================================
%% Internal functions
%% ===================================================================
make_proplist([{_,_}=H|T], Acc) ->
make_proplist(T, [H|Acc]);
make_proplist([H|T], Acc) ->
App = element(1, H),
Ver = element(2, H),
make_proplist(T, [{App,Ver}|Acc]);
make_proplist([], Acc) ->
Acc.
expand_version(Config, ReltoolConfig, Dir) ->
case lists:keyfind(sys, 1, ReltoolConfig) of
{sys, Sys} ->
{Config1, Rels} =
lists:foldl(
fun(Term, {C, R}) ->
{C1, Rel} = expand_rel_version(C, Term, Dir),
{C1, [Rel|R]}
end, {Config, []}, Sys),
ExpandedSys = {sys, lists:reverse(Rels)},
{Config1, lists:keyreplace(sys, 1, ReltoolConfig, ExpandedSys)};
_ ->
{Config, ReltoolConfig}
end.
expand_rel_version(Config, {rel, Name, Version, Apps}, Dir) ->
{NewConfig, VsnString} = rebar_utils:vcs_vsn(Config, Version, Dir),
{NewConfig, {rel, Name, VsnString, Apps}};
expand_rel_version(Config, Other, _Dir) ->
{Config, Other}.