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#!/usr/bin/python
# Copyright 2011 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import cliapp
import os
import sys
import ttystatus
import genbackupdatalib
class GenbackupdataApp(cliapp.Application):
def add_settings(self):
self.settings.bytesize(['create', 'c'],
'how much data to create (default: %default)')
self.settings.bytesize(['file-size'],
'size of one file (default: %default)',
default=16*1024)
self.settings.bytesize(['chunk-size'],
'generate data in chunks of this size '
'(default: %default)',
default=16*1024)
self.settings.integer(['depth'],
'depth of directory tree (default: %default)',
default=3)
self.settings.integer(['max-files'],
'max files/dirs per dir (default: %default)',
default=128)
self.settings.integer(['seed'],
'seed for random number generator '
'(default: %default)',
default=0)
self.settings.boolean(['quiet'], 'do not report progress')
def process_args(self, args):
outputdir = args[0]
bytes = self.settings['create']
self.gen = genbackupdatalib.DataGenerator(self.settings['seed'])
self.names = genbackupdatalib.NameGenerator(outputdir,
self.settings['depth'],
self.settings['max-files'])
self.setup_ttystatus()
self.status['total'] = bytes
while bytes > 0:
n = min(self.settings['file-size'], bytes)
self.create_file(n)
bytes -= n
self.status.finish()
def create_file(self, bytes):
'''Generate one output file.'''
file_size = self.settings['file-size']
chunk_size = self.settings['chunk-size']
pathname = self.names.new()
dirname = os.path.dirname(pathname)
if not os.path.exists(dirname):
os.makedirs(dirname)
f = open(pathname, 'wb')
while bytes >= chunk_size:
self.write_bytes(f, chunk_size)
bytes -= chunk_size
if bytes > 0:
self.write_bytes(f, bytes)
f.close()
def write_bytes(self, f, bytes):
chunk = self.gen.generate(bytes)
f.write(chunk)
self.status['written'] += bytes
def setup_ttystatus(self):
self.status = ttystatus.TerminalStatus(period=0.1)
if self.settings['quiet']:
self.status.disable()
self.status['written'] = 0
self.status['total'] = 0
self.status.add(ttystatus.Literal('Generating: '))
self.status.add(ttystatus.ByteSize('written'))
self.status.add(ttystatus.Literal(' of '))
self.status.add(ttystatus.ByteSize('total'))
self.status.add(ttystatus.Literal(' '))
self.status.add(ttystatus.PercentDone('written', 'total'))
self.status.add(ttystatus.Literal(' ('))
self.status.add(ttystatus.ByteSpeed('written'))
self.status.add(ttystatus.Literal(')'))
if __name__ == '__main__':
GenbackupdataApp().run()
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