Class: MJ::Logging::Progressbar

Inherits:
Logging::Appender
  • Object
show all
Defined in:
lib/mj/logging.rb

Instance Method Summary collapse

Constructor Details

#initialize(title, total = 100, &block) ⇒ Progressbar

Returns a new instance of Progressbar.



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# File 'lib/mj/logging.rb', line 106

def initialize( title, total = 100, &block )
    super( 'Progressbar', :level => :DEBUG )
    @pbar = nil
    @oldlogger = nil
    if not STDOUT.tty? or
       ::Logging.appenders['stdout'].level != ::Logging::level_num(:INFO)
        # We only do the progressbar thing if there is no verbose output active.
        # And only if there is a terminal listening.
        logger.info( title )
        yield
        return
    end

    begin
        # Remove the old stdout logger.
        @oldlogger = ::Logging.appenders[ 'stdout' ]
        ::Logging.logger[ 'root' ].remove_appenders( 'stdout' )
        ::Logging.logger[ 'root' ].add_appenders( self )
        # Add the progressbar logger
        @pbar = ANSI::Progressbar.new( title, total, out = STDOUT )
        yield
    ensure
        @pbar.finish unless @pbar.nil?
        # Reset the logger
        ::Logging.logger[ 'root' ].remove_appenders( 'Progressbar' )
        ::Logging.logger[ 'root' ].add_appenders( @oldlogger )
    end
end