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authorLibravatar Taylor Blau <me@ttaylorr.com>2020-04-13 22:04:08 -0600
committerLibravatar Junio C Hamano <gitster@pobox.com>2020-04-15 09:20:26 -0700
commit4f027355f6b6b5b2ba69e23ff50cb7313d13dd70 (patch)
treee6719d8fa7afd9ff7c730aa895be861ab5332e93 /repo-settings.c
parentt/helper/test-read-graph.c: support commit-graph chains (diff)
downloadtgif-4f027355f6b6b5b2ba69e23ff50cb7313d13dd70.tar.xz
builtin/commit-graph.c: support for '--split[=<strategy>]'
With '--split', the commit-graph machinery writes new commits in another incremental commit-graph which is part of the existing chain, and optionally decides to condense the chain into a single commit-graph. This is done to ensure that the asymptotic behavior of looking up a commit in an incremental chain is not dominated by the number of incrementals in that chain. It can be controlled by the '--max-commits' and '--size-multiple' options. In the next two commits, we will introduce additional splitting strategies that can exert additional control over: - when a split commit-graph is and isn't written, and - when the existing commit-graph chain is discarded completely and replaced with another graph To prepare for this, make '--split' take an optional strategy (as in '--split[=<strategy>]'), and add a new enum to describe which strategy is being used. For now, no strategies are given, and the only enumerated value is 'COMMIT_GRAPH_SPLIT_UNSPECIFIED', indicating the absence of a strategy. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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