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import yaml
import os
import errno
import subprocess
from Cheetah.Template import Template
def read_conf(fname):
stream = file(fname)
conf = yaml.load(stream)
stream.close()
return conf
def get_cfg_option_bool(yobj, key, default=False):
if not yobj.has_key(key): return default
val = yobj[key]
if yobj[key] in [ True, '1', 'on', 'yes', 'true']:
return True
return False
def get_cfg_option_str(yobj, key, default=None):
if not yobj.has_key(key): return default
return yobj[key]
# merge values from src into cand.
# if src has a key, cand will not override
def mergedict(src,cand):
if isinstance(src,dict) and isinstance(cand,dict):
for k,v in cand.iteritems():
if k not in src:
src[k] = v
else:
src[k] = mergedict(src[k],v)
return src
def write_file(file,content,mode=0644):
try:
os.makedirs(os.path.dirname(file))
except OSError as e:
if e.errno != errno.EEXIST:
raise e
f=open(file,"wb")
os.chmod(file,mode)
f.write(content)
f.close()
# get keyid from keyserver
def getkeybyid(keyid,keyserver):
shcmd="""
k=${1} ks=${2};
exec 2>/dev/null
[ -n "$k" ] || exit 1;
armour=$(gpg --list-keys --armour "${k}")
if [ -z "${armour}" ]; then
gpg --keyserver ${ks} --recv $k >/dev/null &&
armour=$(gpg --export --armour "${k}") &&
gpg --batch --yes --delete-keys "${k}"
fi
[ -n "${armour}" ] && echo "${armour}"
"""
args=['sh', '-c', shcmd, "export-gpg-keyid", keyid, keyserver]
return(subp(args)[0])
def subp(args, input=None):
s_in = None
if input is not None:
s_in = subprocess.PIPE
sp = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=s_in)
out,err = sp.communicate(input)
if sp.returncode is not 0:
raise subprocess.CalledProcessError(sp.returncode,args)
return(out,err)
def render_to_file(template, outfile, searchList):
t = Template(file='/etc/ec2-init/templates/%s.tmpl' % template, searchList=[searchList])
f = open(outfile, 'w')
f.write(t.respond())
f.close()
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