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import os, stat
import fs_template
import cache_errors
# store the current key order *here*.
class database(fs_template.FsBased):
complete_eclass_entries = False
auxdbkey_order=('DEPEND', 'RDEPEND', 'SLOT', 'SRC_URI',
'RESTRICT', 'HOMEPAGE', 'LICENSE', 'DESCRIPTION',
'KEYWORDS', 'INHERITED', 'IUSE', 'CDEPEND',
'PDEPEND', 'PROVIDE')
def __init__(self, label, auxdbkeys, **config):
super(database,self).__init__(label, auxdbkeys, **config)
self._base = os.path.join(self._base,
self.label.lstrip(os.path.sep).rstrip(os.path.sep))
if len(self._known_keys) > len(self.auxdbkey_order):
raise Exception("less ordered keys then auxdbkeys")
if not os.path.exists(self._base):
self._ensure_dirs()
def __getitem__(self, cpv):
d = {}
try:
myf = open(os.path.join(self._base, cpv),"r")
for k,v in zip(self.auxdbkey_order, myf):
d[k] = v.rstrip("\n")
except (OSError, IOError),e:
if isinstance(e,IOError) and e.errno == 2:
raise KeyError(cpv)
raise cache_errors.CacheCorruption(cpv, e)
try: d["_mtime_"] = os.lstat(os.path.join(self._base, cpv)).st_mtime
except OSError, e:raise cache_errors.CacheCorruption(cpv, e)
return d
def _setitem(self, cpv, values):
s = cpv.rfind("/")
fp=os.path.join(self._base,cpv[:s],".update.%i.%s" % (os.getpid(), cpv[s+1:]))
try: myf=open(fp, "w")
except (OSError, IOError), e:
if e.errno == 2:
try:
self._ensure_dirs(cpv)
myf=open(fp,"w")
except (OSError, IOError),e:
raise cache_errors.CacheCorruption(cpv, e)
else:
raise cache_errors.CacheCorruption(cpv, e)
# try:
# s = os.path.split(cpv)
# if len(s[0]) == 0:
# s = s[1]
# else:
# s = s[0]
# os._ensure_dirs(s)
#
# except (OSError, IOError), e:
myf.writelines( [ values.get(x,"")+"\n" for x in self.auxdbkey_order] )
myf.close()
self._ensure_access(fp, mtime=values["_mtime_"])
#update written. now we move it.
new_fp = os.path.join(self._base,cpv)
try: os.rename(fp, new_fp)
except (OSError, IOError), e:
os.remove(fp)
raise cache_errors.CacheCorruption(cpv, e)
def _delitem(self, cpv):
try:
os.remove(os.path.join(self._base,cpv))
except OSError, e:
if e.errno == 2:
raise KeyError(cpv)
else:
raise cache_errors.CacheCorruption(cpv, e)
def has_key(self, cpv):
return os.path.exists(os.path.join(self._base, cpv))
def iterkeys(self):
"""generator for walking the dir struct"""
dirs = [self._base]
len_base = len(self._base)
while len(dirs):
for l in os.listdir(dirs[0]):
if l.endswith(".cpickle"):
continue
p = os.path.join(dirs[0],l)
st = os.lstat(p)
if stat.S_ISDIR(st.st_mode):
dirs.append(p)
continue
yield p[len_base+1:]
dirs.pop(0)
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