Synnefo » snf-image-creator

# Copyright 2012 GRNET S.A. All rights reserved.

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from image_creator.output import Output

import sys

from colors import red, green, yellow

from progress.bar import Bar

def output(msg='', new_line=True, decorate=lambda x: x):

    nl = "\n" if new_line else ' '

    sys.stderr.write(decorate(msg) + nl)

def error(msg, new_line=True, colored=True):

    color = red if colored else lambda x: x

    output("Error: %s" % msg, new_line, color)

def warn(msg, new_line=True, colored=True):

    color = yellow if colored else lambda x: x

    output("Warning: %s" % msg, new_line, color)

def success(msg, new_line=True, colored=True):

    color = green if colored else lambda x: x

    output(msg, new_line, color)

class SilentOutput(Output):

    pass

class SimpleOutput(Output):

    def __init__(self, colored=True):

        self.colored = colored

    def error(self, msg, new_line=True):

        error(msg, new_line, self.colored)

    def warn(self, msg, new_line=True):

        warn(msg, new_line, self.colored)

    def success(self, msg, new_line=True):

        success(msg, new_line, self.colored)

    def output(self, msg='', new_line=True):

        output(msg, new_line)

class OutputWthProgress(SimpleOutput):

    class _Progress(Bar):

        MESSAGE_LENGTH = 30

        template = {

            'default': '%(index)d/%(max)d',

            'percent': '%(percent)d%%',

            'b': '%(index)d/%(max)d B',

            'kb': '%(index)d/%(max)d KB',

            'mb': '%(index)d/%(max)d MB'

        }

        def __init__(self, size, title, bar_type='default'):

            super(OutputWthProgress._Progress, self).__init__()

            self.title = title

            self.fill = '#'

            self.bar_prefix = ' ['

            self.bar_suffix = '] '

            self.message = ("%s:" % self.title).ljust(self.MESSAGE_LENGTH)

            self.suffix = self.template[bar_type]

            self.max = size

            # print empty progress bar workaround

            self.goto(1)

        def success(self, result):

            self.output.output("\r%s...\033[K" % self.title, False)

            self.output.success(result)

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