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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_log).
-export([init/1,
set_level/1,
error_level/0,
default_level/0,
log/3,
log/4,
is_verbose/1]).
-define(ERROR_LEVEL, 0).
-define(WARN_LEVEL, 1).
-define(INFO_LEVEL, 2).
-define(DEBUG_LEVEL, 3).
%% ===================================================================
%% Public API
%% ===================================================================
init(Config) ->
Verbosity = rebar_config:get_global(Config, verbose, default_level()),
case valid_level(Verbosity) of
?ERROR_LEVEL -> set_level(error);
?WARN_LEVEL -> set_level(warn);
?INFO_LEVEL -> set_level(info);
?DEBUG_LEVEL -> set_level(debug)
end.
set_level(Level) ->
ok = application:set_env(rebar, log_level, Level).
log(Level, Str, Args) ->
log(standard_io, Level, Str, Args).
log(Device, Level, Str, Args) ->
{ok, LogLevel} = application:get_env(rebar, log_level),
case should_log(LogLevel, Level) of
true ->
io:format(Device, log_prefix(Level) ++ Str, Args);
false ->
ok
end.
error_level() -> ?ERROR_LEVEL.
default_level() -> ?WARN_LEVEL.
is_verbose(Config) ->
rebar_config:get_xconf(Config, is_verbose, false).
%% ===================================================================
%% Internal functions
%% ===================================================================
valid_level(Level) ->
erlang:max(?ERROR_LEVEL, erlang:min(Level, ?DEBUG_LEVEL)).
should_log(debug, _) -> true;
should_log(info, debug) -> false;
should_log(info, _) -> true;
should_log(warn, debug) -> false;
should_log(warn, info) -> false;
should_log(warn, _) -> true;
should_log(error, error) -> true;
should_log(error, _) -> false;
should_log(_, _) -> false.
log_prefix(debug) -> "DEBUG: ";
log_prefix(info) -> "INFO: ";
log_prefix(warn) -> "WARN: ";
log_prefix(error) -> "ERROR: ".
|
