%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
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%% ex: ts=4 sw=4 et
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%% -------------------------------------------------------------------
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%%
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%% rebar: Erlang Build Tools
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%%
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%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com)
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%%
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%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%% of this software and associated documentation files (the "Software"), to deal
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%% in the Software without restriction, including without limitation the rights
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%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%% copies of the Software, and to permit persons to whom the Software is
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%% furnished to do so, subject to the following conditions:
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%%
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%% The above copyright notice and this permission notice shall be included in
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%% all copies or substantial portions of the Software.
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%%
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%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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%% -------------------------------------------------------------------
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-module(rebar_config).
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-export([consult/1
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,consult_file/1
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,format_error/1
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,merge_locks/2]).
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-include("rebar.hrl").
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-include_lib("providers/include/providers.hrl").
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%% ===================================================================
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%% Public API
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%% ===================================================================
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-spec consult(file:name()) -> [any()].
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consult(Dir) ->
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consult_file(filename:join(Dir, ?DEFAULT_CONFIG_FILE)).
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-spec consult_file(file:name()) -> [any()].
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consult_file(File) when is_binary(File) ->
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consult_file(binary_to_list(File));
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consult_file(File) ->
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case filename:extension(File) of
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".script" ->
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consult_and_eval(remove_script_ext(File), File);
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_ ->
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Script = File ++ ".script",
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case filelib:is_regular(Script) of
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true ->
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{ok, Terms} = consult_and_eval(File, Script),
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Terms;
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false ->
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try_consult(File)
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end
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end.
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%% no lockfile
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merge_locks(Config, []) ->
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Config;
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%% empty lockfile
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merge_locks(Config, [[]]) ->
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Config;
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%% lockfile with entries
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merge_locks(Config, [Locks]) ->
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ConfigDeps = proplists:get_value(deps, Config, []),
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%% We want the top level deps only from the lock file.
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%% This ensures deterministic overrides for configs.
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%% Then check if any new deps have been added to the config
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%% since it was locked.
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Deps = [X || X <- Locks, element(3, X) =:= 0],
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NewDeps = find_newly_added(ConfigDeps, Locks),
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[{{locks, default}, Locks}, {{deps, default}, NewDeps++Deps} | Config].
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format_error({bad_dep_name, Dep}) ->
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io_lib:format("Dependency name must be an atom, instead found: ~p", [Dep]).
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%% ===================================================================
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%% Internal functions
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%% ===================================================================
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consult_and_eval(File, Script) ->
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?DEBUG("Evaluating config script ~p", [Script]),
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StateData = try_consult(File),
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file:script(Script, bs([{'CONFIG', StateData}, {'SCRIPT', Script}])).
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remove_script_ext(F) ->
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filename:rootname(F, ".script").
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try_consult(File) ->
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case file:consult(File) of
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{ok, Terms} ->
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Terms;
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{error, enoent} ->
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[];
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{error, Reason} ->
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?ABORT("Failed to read config file ~s:~n ~p", [File, Reason])
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end.
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bs(Vars) ->
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lists:foldl(fun({K,V}, Bs) ->
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erl_eval:add_binding(K, V, Bs)
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end, erl_eval:new_bindings(), Vars).
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%% Find deps that have been added to the config after the lock was created
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find_newly_added(ConfigDeps, LockedDeps) ->
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rebar_utils:filtermap(fun(Dep) when is_tuple(Dep) ->
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check_newly_added(element(1, Dep), LockedDeps);
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(Dep) ->
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check_newly_added(Dep, LockedDeps)
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end, ConfigDeps).
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check_newly_added(Dep, LockedDeps) when is_atom(Dep) ->
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NewDep = ec_cnv:to_binary(Dep),
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case lists:keyfind(NewDep, 1, LockedDeps) of
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false ->
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true;
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Match ->
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case element(3, Match) of
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0 ->
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true;
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_ ->
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?WARN("Newly added dep ~s is locked at a lower level. "
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"If you really want to unlock it, use 'rebar3 upgrade ~s'",
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[NewDep, NewDep]),
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false
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end
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end;
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check_newly_added(Dep, _) ->
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throw(?PRV_ERROR({bad_dep_name, Dep})).
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