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#!/usr/bin/python
import copy
import time
import yaml
import os, re
import sys
import errno
from urlparse import urlparse
from kickstart import kickstart
class KSMetaError(Exception):
"""Exception to catch malformated meta YAML files """
def __init__(self, msg):
Exception.__init__(self)
self.msg = msg
def __str__(self):
return self.msg
def mkdir_p(path):
try:
os.makedirs(path)
except OSError as exc: # Python >2.5
if exc.errno == errno.EEXIST:
pass
else: raise
def yamlload_safe(fname):
""" Safer wrapper for yaml.load() """
try:
with file(fname) as f:
return yaml.load(f)
except IOError:
raise KSMetaError('cannot read meta file: %s' % fname)
except:
# should be YAML format issue
raise KSMetaError('format error of meta file: %s' % fname)
class KSWriter():
def __init__(self, configs=None, repos=None, outdir=".", config=None, packages=False, external=None, targetdefs=None, target=None):
self.dist = None
self.arch = None
self.image_filename = os.path.abspath(os.path.expanduser(configs))
self.outdir = outdir
self.external = external
self.packages = packages
self.config = config
self.image_meta = yamlload_safe(self.image_filename)
self.extra = {}
self.repos = self.parse_repos(repos)
# parse and record target definitions
self.target = target
self.targetdefs = self.parse_targetdef(targetdefs)
def parse_repos(self, repos):
prepos = []
for repo in repos:
repo_meta = yamlload_safe(repo)
prepos = prepos + repo_meta['Repositories']
return prepos
def parse_targetdef(self, targetdefs):
""" Parse the targets defs in YAML to list of dict.
Will join them if multiple files provided.
Once one wrong file found, raise exception to abort
"""
if not targetdefs:
return []
all_defs = []
for tdef in targetdefs:
tmeta = yamlload_safe(tdef)
all_defs.extend(tmeta['Targets'])
return all_defs
def merge(*input):
return list(reduce(set.union, input, set()))
def dump(self):
print yaml.dump(yamlload_safe(self.stream))
def parse(self, img):
conf = copy.copy(self.image_meta['Default'])
plat = copy.copy(self.image_meta[img['Platform']])
conf.update(plat)
conf.update(img)
lval = ['Repos', 'Groups', 'PostScripts', 'NoChrootScripts', 'RemovePackages', 'ExtraPackages']
lvald = {}
for l in lval:
full = []
if self.image_meta['Default'].has_key(l) and self.image_meta['Default'][l]:
full = full + self.image_meta['Default'][l]
if plat.has_key(l) and plat[l]:
full = full + plat[l]
if img.has_key(l) and img[l]:
full = full + img[l]
lvald[l] = sorted(set(full), key=full.index)
conf.update(lvald)
postscript = ""
meta_root = os.path.dirname(self.image_filename)
for scr in conf['PostScripts']:
if os.path.exists('%s/scripts/%s.post' %(meta_root, scr)):
f = open('%s/scripts/%s.post' %(meta_root, scr), 'r')
postscript += f.read()
postscript += "\n"
f.close()
else:
print '%s/scripts/%s.post not found, skipping.' %(meta_root,scr )
nochrootscript = ""
for scr in conf['NoChrootScripts']:
if os.path.exists('%s/scripts/%s.nochroot' %(meta_root,scr)):
f = open('%s/scripts/%s.nochroot' %(meta_root, scr ), 'r')
nochrootscript += f.read()
nochrootscript += "\n"
f.close()
else:
print '%s/scripts/%s.nochroot not found, skipping.' %(meta_root, scr )
ptab = ""
for g in [ plat, img ]:
if g.has_key("Part"):
f = open("%s/partitions/%s" %(meta_root, g['Part']) )
ptab = f.read()
f.close()
conf['Part'] = ptab
conf['Post'] = postscript
conf['NoChroot'] = nochrootscript
return conf
def process_files(self, meta, repos):
new_repos = []
if ( meta.has_key("Architecture") and meta['Architecture'] ) or ( meta.has_key("Distribution") and meta['Distribution']):
for repo in repos:
r = {}
r['Name'] = repo['Name']
repourl = repo['Url']
if repo.has_key('Options'):
r['Options'] = repo['Options']
if meta.has_key("Architecture") or self.arch:
repourl = repourl.replace("@ARCH@", self.arch or meta['Architecture'])
if meta.has_key("Distribution") or self.dist:
repourl = repourl.replace("@DIST@", self.dist or meta['Distribution'])
url = repourl.replace("@RELEASE@", meta['Baseline'])
o = urlparse(url)
new_url = "%s://" % o[0]
if repo.has_key('Username') and repo['Username']:
new_url = "%s%s" % (new_url, repo['Username'] )
if repo.has_key('Password') and repo['Password']:
new_url = "%s:%s@" % (new_url, repo['Password'] )
r['Url'] = "%s%s%s" % (new_url, o[1], o[2] )
new_repos.append(r)
else:
new_repos = repos
nameSpace = {'metadata': meta, 'repos': new_repos}
t = kickstart(searchList=[nameSpace])
a = str(t)
if meta.has_key('FileName') and meta['FileName']:
f = None
if meta.has_key("Baseline"):
mkdir_p("%s/%s" %(self.outdir, meta['Baseline']))
f = open("%s/%s/%s.ks" %( self.outdir, meta['Baseline'], meta['FileName'] ), 'w')
else:
f = open("%s/%s.ks" %( self.outdir, meta['FileName'] ), 'w')
f.write(a)
f.close()
def _image_for_current_target(self, fname):
""" To check whether this image is belong to current
target, which is specifed by user
"""
if not self.target or not self.targetdefs:
# if user doesn't specify them, skip the checking
return True
for tdef in self.targetdefs:
if self.target == tdef['Name'] and fname in tdef['Images']:
# found
return True
return False
def generate(self):
out = {}
if self.image_meta.has_key('Configurations'):
for img in self.image_meta['Configurations']:
conf = self.parse(img)
if self.config:
if img.has_key('FileName') and self.config == img['FileName']:
print "Creating %s (%s.ks)" %(img['Name'], img['FileName'] )
self.process_files(conf, self.repos)
break
else:
if conf.has_key('Active') and conf['Active'] :
print "Creating %s (%s.ks)" %(img['Name'], img['FileName'] )
self.process_files(conf, self.repos)
else:
print "%s is inactive, not generating %s at this time" %(img['Name'], img['FileName'] )
external = []
if self.external:
external = external + self.external
if self.image_meta.has_key('ExternalConfigs') and self.image_meta['ExternalConfigs']:
external = external + self.image_meta['ExternalConfigs']
for path in external:
external_config_dir = os.path.join(os.path.dirname(self.image_filename), path)
if not os.path.exists(external_config_dir):
external_config_dir = os.path.abspath(os.path.expanduser(path))
for f in os.listdir(external_config_dir):
if f.endswith('.yaml'):
if not self._image_for_current_target(f):
# skip
continue
local = yamlload_safe('%s/%s' %(external_config_dir, f))
conf = self.parse(local)
if self.config:
if self.config == conf['FileName']:
if self.packages:
out['baseline'] = conf['Baseline']
out['groups'] = conf['Groups']
out['packages'] = conf['ExtraPackages']
else:
print "Creating %s (%s.ks)" %(conf['Name'], conf['FileName'] )
self.process_files(conf, self.repos)
break
else:
if conf.has_key('Active') and conf['Active']:
print "Creating %s (%s.ks)" %(conf['Name'], conf['FileName'] )
self.process_files(conf, self.repos)
else:
print "%s is inactive, not generate %s this time" %(conf['Name'], conf['FileName'] )
else:
print "WARNING: File '%s' ignored." % (f)
return out
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