def exists(self):
"""
Checks if the destpath file exists (no dead end) and if destpath, cdslpath and cdsllinkpath are
the same file.
This seems to be more complicated then expected ;-) . So here the current approach:
Case 1 Not nested:
If a CDSL is not nested it exists if the sourcepath, the cdsllinkpath and one destpath are exactly
the same file and all other destpaths just exist.
Case 2 nested and hostdependent:
A CDSL exists if the resolved path is nested and the sourcepath is a cdsl shared path and the
link's destpath is a hostdependent path and one resolved destpaths is the same file then the
source and all other destpaths exist.
Case 3 nested and shared:
A CDSL exists if the resolved path is nested and the sourcepath is a cdsl hostdependent path and
the link's destpath is a cdsl shared path and the resolved destpath exists. Not sure about if
also all possible hostdependent sources should exist?.
@return: True if this cdsl exists
@rtype: Boolean
"""
from comoonics.ComPath import Path
from comoonics.cdsl import ltrimDir, isHostdependentPath, isSharedPath
_path=Path()
_path.pushd(self.getBasePath())
_exists=False
_cdslpath=self.getCDSLPath()
_cdsllinkpath=self.getCDSLLinkPath()
if not os.path.islink(_cdslpath):
_path.popd()
return False
_cdslreadpath=ltrimDir(os.readlink(_cdslpath))
if self.isNested():
# Now we start with all cases that hold for being nested
if self.isShared():
# Case 2 (Hostdependent and nested)
if isHostdependentPath(_cdslreadpath, self.cdslRepository) or not isSharedPath(_cdslreadpath, self.cdslRepository):
_path.popd()
return False
elif self.isHostdependent():
# Case 3 (shared and nested)
if not isHostdependentPath(_cdslreadpath, self.cdslRepository) or isSharedPath(_cdslreadpath, self.cdslRepository):
_path.popd()
return False
_exists_once=False
_exists_everywhere=True
for _destpath in self.getDestPaths():
try:
_exists=os.path.exists(_destpath) and \
os.path.samefile(_destpath, _cdslpath) and \
os.path.samefile(_destpath, _cdsllinkpath)
if _exists:
_exists_once=True
if not os.path.exists(_destpath):
_exists_everywhere=False
except OSError:
_exists_once=False
_exists_everywhere=False
_path.popd()
return _exists_once and _exists_everywhere
def test0Ltimdir(self):
from comoonics.cdsl import ltrimDir
_resultpairs = [
["../../../../cluster/shared/hostdependent/shared", "cluster/shared/hostdependent/shared"],
["/../../../../cluster/shared/hostdependent/shared", "/../../../../cluster/shared/hostdependent/shared"],
]
for _tmp in _resultpairs:
self.assertEquals(ltrimDir(_tmp[0]), _tmp[1], "ltrimDir(%s) == %s" % (_tmp[0], _tmp[1]))
def test0Ltimdir(self):
from comoonics.cdsl import ltrimDir
_resultpairs = [[
"../../../../cluster/shared/hostdependent/shared",
"cluster/shared/hostdependent/shared"
],
[
"/../../../../cluster/shared/hostdependent/shared",
"/../../../../cluster/shared/hostdependent/shared"
]]
for _tmp in _resultpairs:
self.assertEquals(ltrimDir(_tmp[0]), _tmp[1],
"ltrimDir(%s) == %s" % (_tmp[0], _tmp[1]))
def exists(self):
"""
Checks if the destpath file exists (no dead end) and if destpath, cdslpath and cdsllinkpath are
the same file.
This seems to be more complicated then expected ;-) . So here the current approach:
Case 1 Not nested:
If a CDSL is not nested it exists if the sourcepath, the cdsllinkpath and one destpath are exactly
the same file and all other destpaths just exist.
Case 2 nested and hostdependent:
A CDSL exists if the resolved path is nested and the sourcepath is a cdsl shared path and the
link's destpath is a hostdependent path and one resolved destpaths is the same file then the
source and all other destpaths exist.
Case 3 nested and shared:
A CDSL exists if the resolved path is nested and the sourcepath is a cdsl hostdependent path and
the link's destpath is a cdsl shared path and the resolved destpath exists. Not sure about if
also all possible hostdependent sources should exist?.
@return: True if this cdsl exists
@rtype: Boolean
"""
from comoonics.ComPath import Path
from comoonics.cdsl import ltrimDir, isHostdependentPath, isSharedPath
_path = Path()
_path.pushd(self.getBasePath())
_exists = False
_cdslpath = self.getCDSLPath()
_cdsllinkpath = self.getCDSLLinkPath()
if not os.path.islink(_cdslpath):
_path.popd()
return False
_cdslreadpath = ltrimDir(os.readlink(_cdslpath))
if self.isNested():
# Now we start with all cases that hold for being nested
if self.isShared():
# Case 2 (Hostdependent and nested)
if isHostdependentPath(
_cdslreadpath,
self.cdslRepository) or not isSharedPath(
_cdslreadpath, self.cdslRepository):
_path.popd()
return False
elif self.isHostdependent():
# Case 3 (shared and nested)
if not isHostdependentPath(
_cdslreadpath, self.cdslRepository) or isSharedPath(
_cdslreadpath, self.cdslRepository):
_path.popd()
return False
_exists_once = False
_exists_everywhere = True
for _destpath in self.getDestPaths():
try:
_exists=os.path.exists(_destpath) and \
os.path.samefile(_destpath, _cdslpath) and \
os.path.samefile(_destpath, _cdsllinkpath)
if _exists:
_exists_once = True
if not os.path.exists(_destpath):
_exists_everywhere = False
except OSError:
_exists_once = False
_exists_everywhere = False
_path.popd()
return _exists_once and _exists_everywhere