path: root/fetch-negotiator.c
AgeCommit message (Collapse)Author
2019-08-13repo-settings: create feature.experimental settingDerrick Stolee
The 'feature.experimental' setting includes config options that are not committed to become defaults, but could use additional testing. Update the following config settings to take new defaults, and to use the repo_settings struct if not already using them: * 'pack.useSparse=true' * 'fetch.negotiationAlgorithm=skipping' In the case of fetch.negotiationAlgorithm, the existing logic would load the config option only when about to use the setting, so had a die() statement on an unknown string value. This is removed as now the config is parsed under prepare_repo_settings(). In general, this die() is probably misplaced and not valuable. A test was removed that checked this die() statement executed. Signed-off-by: Derrick Stolee <> Signed-off-by: Junio C Hamano <>
2018-08-01negotiator: unknown fetch.negotiationAlgorithm should error outÆvar Arnfjörð Bjarmason
Change the handling of fetch.negotiationAlgorithm=<str> to error out on unknown strings, i.e. everything except "default" or "skipping". This changes the behavior added in 42cc7485a2 ("negotiator/skipping: skip commits during fetch", 2018-07-16) which would ignore all unknown values and silently fall back to the "default" value. For a feature like this it's much better to produce an error than proceed. We don't want users to debug some amazingly slow fetch that should benefit from "skipping", only to find that they'd forgotten to deploy the new git version on that particular machine. Signed-off-by: Ævar Arnfjörð Bjarmason <> Signed-off-by: Junio C Hamano <>
2018-07-16negotiator/skipping: skip commits during fetchJonathan Tan
Introduce a new negotiation algorithm used during fetch that skips commits in an effort to find common ancestors faster. The skips grow similarly to the Fibonacci sequence as the commit walk proceeds further away from the tips. The skips may cause unnecessary commits to be included in the packfile, but the negotiation step typically ends more quickly. Usage of this algorithm is guarded behind the configuration flag fetch.negotiationAlgorithm. Signed-off-by: Jonathan Tan <> Signed-off-by: Junio C Hamano <>
2018-06-15fetch-pack: introduce negotiator APIJonathan Tan
Introduce the new files fetch-negotiator.{h,c}, which contains an API behind which the details of negotiation are abstracted. Currently, only one algorithm is available: the existing one. This patch is written to be easily reviewed: static functions are moved verbatim from fetch-pack.c to negotiator/default.c, and it can be seen that the lines replaced by negotiator->X() calls are present in the X() functions respectively. Signed-off-by: Jonathan Tan <> Signed-off-by: Junio C Hamano <>