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# Copyright (C) 2012 Aleksey Lim
#
# 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 os
import logging
import hashlib
from os.path import isfile, lexists, exists, dirname
from active_toolkit import util
_logger = logging.getLogger('toolkit')
def spawn(cmd_filename, *args):
_logger.debug('Spawn %s%r', cmd_filename, args)
if os.fork():
return
os.execvp(cmd_filename, (cmd_filename,) + args)
def symlink(src, dst):
if not isfile(src):
_logger.debug('Cannot link %r to %r, source file is absent', src, dst)
return
_logger.debug('Link %r to %r', src, dst)
if lexists(dst):
os.unlink(dst)
elif not exists(dirname(dst)):
os.makedirs(dirname(dst))
os.symlink(src, dst)
def ensure_dsa_pubkey(path):
if not exists(path):
_logger.info('Create DSA server key')
util.assert_call([
'/usr/bin/ssh-keygen', '-q', '-t', 'dsa', '-f', path,
'-C', '', '-N', ''])
with file(path + '.pub') as f:
for line in f:
line = line.strip()
if line.startswith('ssh-'):
key = line.split()[1]
return str(hashlib.sha1(key).hexdigest())
raise RuntimeError('No valid DSA public key in %r' % path)
def svg_to_png(src_path, dst_path, width, height):
import rsvg
import cairo
svg = rsvg.Handle(src_path)
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
context = cairo.Context(surface)
scale = min(
float(width) / svg.props.width,
float(height) / svg.props.height)
context.scale(scale, scale)
svg.render_cairo(context)
surface.write_to_png(dst_path)
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