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# -*- coding: utf-8 -*-
#
# Copyright (C) 2016 Dr. Robert C. Green II.
#
# This file is part of Combox.
#
# Combox 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.
#
# Combox 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 Combox (see COPYING). If not, see
# <http://www.gnu.org/licenses/>.
##################################################
## YAML Config format
##################################################
##
## combox_dir: path/to/combox/
##
## topsecret: dba0079f1cb3a3b56e102dd5e04fa2af
##
## nodes_info:
## node_name:
## path: path/to/shard1/dir/
## size: 1000 # in MB
## available: 500 # in MB
## node name:
## path: path/to/shard2/dir/
## size: 2000
## available: 1500
## node name:
## path: path/to/shard3/dir
## size: 3000
## available: 1500
##
##################################################
import os
import yaml
import getpass
import hashlib
import sys
import stat
from os import path
from os.path import expanduser
def get_secret():
"""Reads passphrase from standard input.
Uses :func:`getpass.getpass`.
:returns:
The passphrase read from standard input.
:rtype: str
:raises EOFError:
If the standard input is closed.
:raises GetPassWarning:
When unable to turn echo off on the input.
"""
return getpass.getpass('passphrase: ')
def get_stdin(prompt):
"""Read string from standard input.
:param str prompt:
Prompt string.
:returns:
The string read from standard input.
:rtype: str
"""
prompt = "%s: " % (prompt)
return raw_input(prompt)
def config_cb(config_dir = path.join(expanduser("~"), '.combox'),
pass_func = get_secret,
input_func = get_stdin,
write=True):
"""config_cb(config_dir = path.join(expanduser("~"), '.combox'), pass_func=get_secret, input_func=get_stdin, write=True)
Configure combox (CLI).
:param str config_dir:
Location of the combox config directory. Defaults to $HOME/.combox.
:param function pass_func:
Function to read the passphrase. Defaults to
:func:`get_secret`.
:param function input_func:
Function to read a string from standard input. Defaults to
:func:`get_stdin`.
:param bool write:
`True` if combox configuration must be written to disk under the
combox config directory; `False` otherwise. Defaults to `True`.
:returns: combox configuration information as dictionary.
:rtype: dict
"""
config_file_path = path.join(config_dir, 'config.yaml')
config_info = {}
config_info['combox_name'] = input_func('name of this combox')
config_info['combox_dir'] = path.abspath(expanduser(input_func('path to combox directory')))
silo_help_txt = 'silo directory (default: %s)' % (config_dir)
silo_dir = expanduser(input_func(silo_help_txt))
if silo_dir:
config_info['silo_dir'] = path.abspath(silo_dir)
else:
config_info['silo_dir'] = path.abspath(config_dir)
config_info['topsecret'] = pass_func()
no_nodes = int(input_func('number of nodes'))
nodes = {}
for i in range(no_nodes):
node_name = input_func('node %d name' % i)
nodes[node_name] = {}
nodes[node_name]['path'] = path.abspath(expanduser(input_func('node %d path' % i)))
nodes[node_name]['size'] = input_func('node %d size (in mega bytes)' % i)
nodes[node_name]['available'] = nodes[node_name]['size']
# create node path, if it doesn't exists yet.
if not path.exists(nodes[node_name]['path']):
os.makedirs(nodes[node_name]['path'])
config_info['nodes_info'] = nodes
if not path.exists(config_dir):
# Create combox config directory.
os.mkdir(config_dir, 0700)
if not path.exists(config_info['combox_dir']):
# Create combox directory.
os.makedirs(config_info['combox_dir'])
if write:
config_file = open(config_file_path, 'w')
yaml.dump(config_info, config_file, default_flow_style=False)
os.chmod(config_file_path,stat.S_IRUSR|stat.S_IWUSR)
return config_info
else:
return config_info
def get_nodedirs(config):
"""Returns paths of node directories as a list.
:param dict config:
A dictionary that contains configuration information about
combox.
:returns:
Paths of node directories as a list.
:rtype: list
"""
nodes = []
for node in config['nodes_info'].itervalues():
node_path = path.abspath(node['path'])
nodes.append(node_path)
return sorted(nodes)
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