branching: merge stable into default

caches: issue both debug and blackbox log message This increase the odd someone looking for issue will find them.

cmdrewrite: rename variable and move it closer to where it is used Renaming to satisfy pep8-naming linter plugin, which complained on this variable because all-uppercase names are reserved for constants, and constants need to be module-level. This variable is not a good choice for moving up to the module level because it's used only in one place. Additionally, let's have it closer to the place it's actually used to potentially avoid an extra call to _() function (however cheap it may be).

changelog: mention the cache improvements

obshashrangecache: be more paranoid in the errors we catch It seems like there error were already covered. Better safe than sorry.

stablerangecache: be more paranoid in the errors we catch It seems like there error were already covered. Better safe than sorry.

stablesortcache: update the variable tracking on-disk state after write Since we updated the on disk content, we should update that value. In practice the object will likely be discarded after the write, but there is nothing wrong in being more correct.

stablesortcache: ignore permission and OS errors when writing This cache is related to the obshashrange one and we update it lazily by default. This can be an issue when pulling locally from a read only repository that was not configured for a more aggressive cache warming. The raised permission error was uncaught and could crash the whole process. Errors during cache update should not block Mercurial operations.

firstmergecache: update the variable tracking on-disk state after write Since we updated the on disk content, we should update that value. In practice the object will likely be discarded after the write, but there is nothing wrong in being more correct.

firstmergecache: ignore permission and OS errors when writing This cache is related to the obshashrange one and we update it lazily by default. This can be an issue when pulling locally from a read only repository that was not configured for a more aggressive cache warming. The raised permission error was uncaught and could crash the whole process. Errors during cache update should not block Mercurial operations.

depthcache: update the variable tracking on disk state after write Since we updated the on disk content, we should update that value. In practice the object will likely be discarded after the write, but there is nothing wrong in being more correct.

depthcache: ignore permission and OS errors when writing This cache is related to the obshashrange one and we update it lazily by default. This can be an issue when pulling locally from a read only repository that was not configured for a more aggressive cache warming. The raised permission error was uncaught and could crash the whole process. Errors during Cache update should not block Mercurial operations.

obscache: update the variable tracking on disk state after write Since we updated the on disk content, we should update that value. In practice the object will likely be discarded after the write, but there is nothing wrong in being more correct.

obscache: ignore permission and OS errors when writing In practice we always update this cache along side a new transaction, with lock taken so permission issues should not happens. However, staying on the safe side is better. Errors during Cache update should not block Mercurial operations.

obshashrange: force reset if many changes If there is many new markers (or the markers affect many changesets) resetting affected changeset can get slow. A common case for that is then changeset and markers are added in different transaction, (eg: when using clone bundle). When we detect such case, we reset the obshashrange cache, rewarming it should be faster. Here many is arbitrarily set to 10 000. The number might get adjusted.