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Moved some XXXes around, added some methods (so naming them isn't hard) and a new XXX about methods that return file objects.

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This commit is contained in:
Jeremy Fincher 2005-07-18 04:37:32 +00:00
parent 75ecf79d58
commit 27ac845628
1 changed files with 22 additions and 6 deletions
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28
src/utils/transaction.py
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@ -124,7 +124,29 @@ class Transaction(TransactionMixin):
def _makeOriginal(self, filename):
File.copy(filename, self._original(filename))
# XXX create, replace, etc. return file objects. This class should keep a
# list of such file descriptors and only allow a commit if all of them
# are closed. Trying to commit with open file objects should raise an
# exception.
def create(self, filename):
"""
Returns a file object for a filename that should be created (with
the contents as they were written to the filename) when the transaction
is committed.
"""
raise NotImplementedError # XXX.
def mkdir(self, filename):
raise NotImplementedError # XXX
def delete(self, filename):
raise NotImplementedError # XXX
def replace(self, filename):
"""
Returns a file object for a filename that should be replaced by the
contents written to the file object when the transaction is committed.
"""
self._checkCwd()
self._makeOriginal(filename)
self._journalCommand('replace', filename)
@ -155,12 +177,6 @@ class Transaction(TransactionMixin):
def commitAppend(self, filename, length):
shutil.copy(self._replacement(filename), filename)
# XXX need to be able to create files transactionally. (easy; just be sure
# the file doesn't exist in the real tree; remove it in rollback if it
# exists)
# XXX need to be able to delete files transactionally. (easy; just be sure
# the file exists in the real tree and keep a copy of it; in rollback
# just copy the file back)
# XXX need to be able to rename files transactionally. (hard; especially
# with renames that depend on one another. It might be easier to do
# rename separate from relocate.)