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# frozen_string_literal: true
# Copyright, 2017, by Samuel G. D. Williams. <http://www.codeotaku.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.
require_relative 'filter'
module Console
class Resolver
# You can change the log level for different classes using CONSOLE_$LEVEL env vars.
#
# e.g. `CONSOLE_WARN=Acorn,Banana CONSOLE_DEBUG=Cat` will set the log level for the classes Acorn and Banana to `warn` and Cat to `debug`. This overrides the default log level.
#
# You can enable all log levels for a given class by using `CONSOLE_ON=MyClass`. Similarly you can disable all logging using `CONSOLE_OFF=MyClass`.
#
# @parameter logger [Logger] A logger instance to set the logging levels on.
# @parameter env [Hash] The environment to read levels from.
#
# @returns [Nil] If there were no custom logging levels specified in the environment.
# @returns [Resolver] If there were custom logging levels, then the created resolver is returned.
def self.default_resolver(logger, env = ENV)
# Find all CONSOLE_$LEVEL variables from environment:
levels = logger.class::LEVELS
.map{|label, level| [level, env["CONSOLE_#{label.upcase}"]&.split(',')]}
.to_h
.compact
off_klasses = env['CONSOLE_OFF']&.split(',')
on_klasses = env['CONSOLE_ON']&.split(',')
resolver = nil
# If we have any levels, then create a class resolver, and each time a class is resolved, set the log level for that class to the specified level:
if on_klasses&.any?
resolver ||= Resolver.new
resolver.bind(on_klasses) do |klass|
logger.enable(klass, logger.class::MINIMUM_LEVEL - 1)
end
end
if off_klasses&.any?
resolver ||= Resolver.new
resolver.bind(off_klasses) do |klass|
logger.disable(klass)
end
end
levels.each do |level, names|
resolver ||= Resolver.new
resolver.bind(names) do |klass|
logger.enable(klass, level)
end
end
return resolver
end
def initialize
@names = {}
@trace_point = TracePoint.new(:class, &self.method(:resolve))
end
def bind(names, &block)
names.each do |name|
if klass = Object.const_get(name) rescue nil
yield klass
else
@names[name] = block
end
end
if @names.any?
@trace_point.enable
else
@trace_point.disable
end
end
def waiting?
@trace_point.enabled?
end
def resolve(trace_point)
if block = @names.delete(trace_point.self.to_s)
block.call(trace_point.self)
end
if @names.empty?
@trace_point.disable
end
end
end
end
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