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# -*- coding: utf-8 -*-
#################################################################################
# LAYMAN OVERLAY SOURCE BASE CLASS
#################################################################################
# File: source.py
#
# Base class for the different overlay types.
#
# Copyright:
# (c) 2010 Sebastian Pipping
# Distributed under the terms of the GNU General Public License v2
#
# Author(s):
# Sebastian Pipping <sebastian@pipping.org>
import os
import copy
import sys
import shutil
import subprocess
from layman.debug import OUT
from layman.utils import path
def _resolve_command(command):
if os.path.isabs(command):
if not os.path.exists(command):
raise Exception('Program "%s" not found' % command)
return ('File', command)
else:
kind = 'Command'
env_path = os.environ['PATH']
for d in env_path.split(os.pathsep):
f = os.path.join(d, command)
if os.path.exists(f):
return ('Command', f)
raise Exception('Cound not resolve command "%s" based on PATH "%s"' % (command, env_path))
def require_supported(binaries):
for command, mtype, package in binaries:
found = False
kind, path = _resolve_command(command)
if not path:
raise Exception(kind + ' ' + command + ' seems to be missing!'
' Overlay type "' + mtype + '" not support'
'ed. Did you emerge ' + package + '?')
return True
class OverlaySource(object):
type_key = None
def __init__(self, parent, xml, config, _location, ignore = 0, quiet = False):
self.parent = parent
self.src = _location
self.config = config
self.ignore = ignore
self.quiet = quiet
def __eq__(self, other):
return self.src == other.src
def __ne__(self, other):
return not self.__eq__(other)
def add(self, base, quiet = False):
'''Add the overlay.'''
mdir = path([base, self.parent.name])
if os.path.exists(mdir):
raise Exception('Directory ' + mdir + ' already exists. Will not ov'
'erwrite its contents!')
os.makedirs(mdir)
def sync(self, base, quiet = False):
'''Sync the overlay.'''
pass
def delete(self, base):
'''Delete the overlay.'''
mdir = path([base, self.parent.name])
if not os.path.exists(mdir):
OUT.warn('Directory ' + mdir + ' did not exist, no files deleted.')
return
OUT.info('Deleting directory "%s"' % mdir, 2)
shutil.rmtree(mdir)
def supported(self):
'''Is the overlay type supported?'''
return True
def is_supported(self):
'''Is the overlay type supported?'''
try:
self.supported()
return True
except:
return False
def command(self):
return self.config['%s_command' % self.__class__.type_key]
def run_command(self, *args, **kwargs):
file_to_run = _resolve_command(self.command())[1]
args = (file_to_run, ) + args
assert('pwd' not in kwargs) # Bug detector
cwd = kwargs.get('cwd', None)
env = None
env_updates = None
if 'env' in kwargs:
# Build actual env from surrounding plus updates
env_updates = kwargs['env']
env = copy.copy(os.environ)
env.update(env_updates)
command_repr = ' '.join(args)
if env_updates:
command_repr = '%s %s' % (' '.join('%s=%s' % (k, v) for (k, v) in sorted(env_updates.items())), command_repr)
if cwd:
command_repr = '( cd %s && %s )' % (cwd, command_repr)
OUT.info('Running... # %s' % command_repr, 2)
if self.quiet:
output_target = open('/dev/null', 'w')
else:
output_target = None # i.e. re-use parent file descriptors
proc = subprocess.Popen(args,
stdout=output_target,
stderr=output_target,
cwd=cwd,
env=env)
if self.quiet:
output_target.close()
return proc.wait()
def to_xml_hook(self, repo_elem):
pass
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