def get_writable_fsobj(self, fsobj, prefer_reuse=True, empty=False):
path = source = None
if fsobj:
source = fsobj.data
if source.mutable:
return fsobj
if self.allow_reuse and prefer_reuse:
path = source.path
# XXX: this should be doing abspath fs intersection probably,
# although the paths generated are from triggers/engine- still.
if path is not None and not path.startswith(self.tempdir):
# the fsobj pathway isn't in temp space; force a transfer.
path = None
if path:
# ok, it's tempspace, and reusable.
obj = data_source.local_source(path,
True,
encoding=source.encoding)
if empty:
obj.bytes_fileobj(True).truncate(0)
return obj
# clone it into tempspace; it's required we control the tempspace,
# so this function is safe in our usage.
fd, path = tempfile.mkstemp(prefix='merge-engine-', dir=self.tempdir)
# XXX: annoying quirk of python, we don't want append mode, so 'a+'
# isn't viable; wr will truncate the file, so data_source uses r+.
# this however doesn't allow us to state "create if missing"
# so we create it ourselves. Annoying, but so it goes.
# just touch the filepath.
open(path, 'w').close()
new_source = data_source.local_source(path,
True,
encoding=getattr(
fsobj, 'encoding', None))
if source and not empty:
data_source.transfer(source.bytes_fsobj(),
new_source.bytes_fsobj(True))
return new_source
def get_writable_fsobj(self, fsobj, prefer_reuse=True, empty=False):
path = source = None
if fsobj:
source = fsobj.data
if source.mutable:
return fsobj
if self.allow_reuse and prefer_reuse:
path = source.path
# XXX: this should be doing abspath fs intersection probably,
# although the paths generated are from triggers/engine- still.
if path is not None and not path.startswith(self.tempdir):
# the fsobj pathway isn't in temp space; force a transfer.
path = None
if path:
# ok, it's tempspace, and reusable.
obj = data_source.local_source(path, True,
encoding=source.encoding)
if empty:
obj.bytes_fileobj(True).truncate(0)
return obj
# clone it into tempspace; it's required we control the tempspace,
# so this function is safe in our usage.
fd, path = tempfile.mkstemp(prefix='merge-engine-', dir=self.tempdir)
# XXX: annoying quirk of python, we don't want append mode, so 'a+'
# isn't viable; wr will truncate the file, so data_source uses r+.
# this however doesn't allow us to state "create if missing"
# so we create it ourselves. Annoying, but so it goes.
# just touch the filepath.
open(path, 'w').close()
new_source = data_source.local_source(path, True,
encoding=getattr(fsobj, 'encoding', None))
if source and not empty:
data_source.transfer(source.bytes_fsobj(), new_source.bytes_fsobj(True))
return new_source