Synnefo » snf-image-creator

from image_creator.output.cli import SilentOutput, SimpleOutput, \

                                     OutputWthProgress

        out = SilentOutput()

        out = OutputWthProgress(True) if sys.stderr.isatty() else \

                                                            SimpleOutput(False)

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

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

class Output(object):

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

        pass

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

        pass

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

        pass

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

        pass

    def _get_progress(self):

        progress = self._Progress

        progress.output = self

        return progress

    Progress = property(_get_progress)

    class _Progress(object):

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

            self.size = size

            self.output.output("%s..." % title, False)

        def goto(self, dest):

            pass

        def next(self):

            pass

        def success(self, result):

            self.output.success(result)

    def progress_generator(self, message):

        def generator(n):

            progressbar = self.Progress(n, message)

            for _ in range(n):

                yield

                progressbar.next()

            progressbar.success('done')

            yield

        return generator

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :

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

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

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)

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :

        progressbar = self.out.Progress(prog_size, "Calculating md5sum", 'mb')