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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_config).
-export([consult/1
,consult_file/1
,merge_locks/2]).
-include("rebar.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
-spec consult(file:name()) -> [any()].
consult(Dir) ->
consult_file(filename:join(Dir, ?DEFAULT_CONFIG_FILE)).
-spec consult_file(file:name()) -> [any()].
consult_file(File) when is_binary(File) ->
consult_file(binary_to_list(File));
consult_file(File) ->
case filename:extension(File) of
".script" ->
consult_and_eval(remove_script_ext(File), File);
_ ->
Script = File ++ ".script",
case filelib:is_regular(Script) of
true ->
{ok, Terms} = consult_and_eval(File, Script),
Terms;
false ->
?DEBUG("Consult config file ~p", [File]),
try_consult(File)
end
end.
%% no lockfile
merge_locks(Config, []) ->
Config;
%% empty lockfile
merge_locks(Config, [[]]) ->
Config;
%% lockfile with entries
merge_locks(Config, [Locks]) ->
{deps, ConfigDeps} = lists:keyfind(deps, 1, Config),
%% We want the top level deps only from the lock file.
%% This ensures deterministic overrides for configs.
%% Then check if any new deps have been added to the config
%% since it was locked.
Deps = [X || X <- Locks, element(3, X) =:= 0],
NewDeps = find_newly_added(ConfigDeps, Locks),
[{{locks, default}, Locks}, {{deps, default}, NewDeps++Deps} | Config].
%% ===================================================================
%% Internal functions
%% ===================================================================
consult_and_eval(File, Script) ->
?DEBUG("Evaluating config script ~p", [Script]),
StateData = try_consult(File),
file:script(Script, bs([{'CONFIG', StateData}, {'SCRIPT', Script}])).
remove_script_ext(F) ->
filename:rootname(F, ".script").
try_consult(File) ->
case file:consult(File) of
{ok, Terms} ->
Terms;
{error, enoent} ->
[];
{error, Reason} ->
?ABORT("Failed to read config file ~s:~n ~p", [File, Reason])
end.
bs(Vars) ->
lists:foldl(fun({K,V}, Bs) ->
erl_eval:add_binding(K, V, Bs)
end, erl_eval:new_bindings(), Vars).
%% Find deps that have been added to the config after the lock was created
find_newly_added(ConfigDeps, LockedDeps) ->
rebar_utils:filtermap(fun(Dep) when is_tuple(Dep) ->
check_dep(element(1, Dep), LockedDeps);
(Dep) ->
check_dep(Dep, LockedDeps)
end, ConfigDeps).
check_dep(Dep, LockedDeps) ->
NewDep = ec_cnv:to_binary(Dep),
case lists:keyfind(NewDep, 1, LockedDeps) of
false ->
true;
Match ->
case element(3, Match) of
0 ->
true;
_ ->
?WARN("Newly added dep ~s is locked at a lower level. "
"If you really want to unlock it, use 'rebar3 upgrade ~s'",
[NewDep, NewDep]),
false
end
end.
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