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ansible/library/copy

124 lines
3.5 KiB
Python

#!/usr/bin/python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
#
import sys
import os
import shlex
import shutil
import syslog
try:
from hashlib import md5 as _md5
except ImportError:
from md5 import md5 as _md5
# ===========================================
# convert arguments of form a=b c=d
# to a dictionary
# FIXME: make more idiomatic
def dump_kv(vars):
return " ".join("%s='%s'" % (k,v) for (k,v) in vars.items())
def exit_kv(rc=0, **kwargs):
if 'path' in kwargs:
add_path_info(kwargs)
print dump_kv(kwargs)
sys.exit(rc)
def md5(filename):
''' Return MD5 hex digest of local file, or None if file is not present. '''
if not os.path.exists(filename):
return None
digest = _md5()
blocksize = 64 * 1024
infile = open(filename, 'rb')
block = infile.read(blocksize)
while block:
digest.update(block)
block = infile.read(blocksize)
infile.close()
return digest.hexdigest()
# ===========================================
if len(sys.argv) == 1:
exit_kv(rc=1, failed=1, msg="incorrect number of arguments given")
argfile = sys.argv[1]
if not os.path.exists(argfile):
exit_kv(rc=1, failed=1, msg="file %s does not exist" % (argfile))
args = open(argfile, 'r').read()
items = shlex.split(args)
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
params = {}
for x in items:
(k, v) = x.split("=")
params[k] = v
src = params['src']
dest = params['dest']
if src:
src = os.path.expanduser(src)
if dest:
dest = os.path.expanduser(dest)
md5sum_src = None
# raise an error if there is no src file
if not os.path.exists(src):
exit_kv(rc=1, failed=1, msg="Source %s failed to transfer" % (src))
if not os.access(src, os.R_OK):
exit_kv(rc=1, failed=1, msg="Source %s not readable" % (src))
md5sum_src = md5(src)
md5sum_dest = None
# check if there is no dest file
if os.path.exists(dest):
# raise an error if copy has no permission on dest
if not os.access(dest, os.W_OK):
exit_kv(rc=1, failed=1, msg="Destination %s not writable" % (dest))
if not os.access(dest, os.R_OK):
exit_kv(rc=1, failed=1, msg="Destination %s not readable" % (dest))
md5sum_dest = md5(dest)
else:
if not os.access(os.path.dirname(dest), os.W_OK):
exit_kv(rc=1, failed=1, msg="Destination %s not writable" % (os.path.dirname(dest)))
if md5sum_src != md5sum_dest:
# was os.system("cp %s %s" % (src, dest))
try:
shutil.copyfile(src, dest)
except shutil.Error:
exit_kv(rc=1, failed=1, msg="failed to copy: %s and %s are the same" % (src, dest))
except IOError:
exit_kv(rc=1, failed=1, msg="failed to copy: %s to %s" % (src, dest))
changed = True
else:
changed = False
# mission accomplished
#print "md5sum=%s changed=%s" % (md5sum_src, changed)
exit_kv(dest=dest, src=src, md5sum=md5sum_src, changed=changed)