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47531f47
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2019-10-11T12:44:09
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refs: unlock unmodified refs on transaction commit
Refs which are locked in a transaction without an altered target,
still should to be unlocked on `git_transaction_commit`.
`git_transaction_free` also unlocks refs but the moment of calling of `git_transaction_free`
cannot be controlled in all situations.
Some binding libs call `git_transaction_free` on garbage collection or not at all if the
application exits before and don't provide public access to `git_transaction_free`.
It is better to release locks as soon as possible.
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3335a034
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2019-10-10T15:28:46
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refs: fix locks getting forcibly removed
The flag GIT_FILEBUF_FORCE currently does two things:
1. It will cause the filebuf to create non-existing leading
directories for the file that is about to be written.
2. It will forcibly remove any pre-existing locks.
While most call sites actually do want (1), they do not want to
remove pre-existing locks, as that renders the locking mechanisms
effectively useless.
Introduce a new flag `GIT_FILEBUF_CREATE_LEADING_DIRS` to
separate both behaviours cleanly from each other and convert
callers to use it instead of `GIT_FILEBUF_FORCE` to have them
honor locked files correctly.
As this conversion removes all current users of `GIT_FILEBUF_FORCE`,
this commit removes the flag altogether.
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c327d5db
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2014-10-09T16:29:30
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transaction: rename lock() to lock_ref()
This leaves space for future expansion to locking other resources
without having to change the API for references.
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ab8d9242
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2014-06-28T06:39:38
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Introduce reference transactions
A transaction allows you to lock multiple references and set up changes
for them before applying the changes all at once (or as close as the
backend supports).
This can be used for replication purposes, or for making sure some
operations run when the reference is locked and thus cannot be changed.
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