module Yologga

# File lib/yologga.rb, line 15
def add_hourly_rotation_period_support!
  if hourly_mixin
    Logger::LogDevice.prepend(hourly_mixin)
  else
    warn unsupported_warning
  end
end

# File lib/yologga.rb, line 23
def default_rotation_period=(period)
  raise unsupported_warning if period == "hourly" && !hourly_mixin

  mixin = Module.new do
    define_method(:initialize) do |logdev, shift_age = period, *args|
      super(logdev, shift_age, *args)
    end
  end

  Logger.prepend(mixin)
end

# File lib/yologga.rb, line 52
def gzip=(enabled)
  raise unable_to_find_gzip if enabled && !system("gzip --help &> /dev/null")
  @gzip = enabled
end

# File lib/yologga.rb, line 74
def logs_lifetime=(logs_lifetime)
  @logs_lifetime = logs_lifetime
end

# File lib/yologga.rb, line 80
def hourly_mixin
  return @mixin if defined?(@mixin)

  mixin_name = "Yologga::Patch::Ruby_#{RUBY_VERSION.split('.').first(2).join('_')}"
  @mixin = begin
    Module.const_get(mixin_name)
  rescue NameError
    nil
  end
end

# File lib/yologga.rb, line 91
def unable_to_find_gzip
  "Unable to find gzip in PATH environment variable."
end

# File lib/yologga.rb, line 95
def unsupported_warning
  "Hourly log rotation period is not supported for Ruby #{RUBY_VERSION}"
end