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midx: enable core.multiPackIndex by default

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The core.multiPackIndex setting has been around since c4d25228eb
(config: create core.multiPackIndex setting, 2018-07-12), but has been
disabled by default. If a user wishes to use the multi-pack-index
feature, then they must enable this config and run 'git multi-pack-index
write'.

The multi-pack-index feature is relatively stable now, so make the
config option true by default. For users that do not use a
multi-pack-index, the only extra cost will be a file lookup to see if a
multi-pack-index file exists (once per process, per object directory).

Also, this config option will be referenced by an upcoming
"incremental-repack" task in the maintenance builtin, so move the config
option into the repository settings struct. Note that if
GIT_TEST_MULTI_PACK_INDEX=1, then we want to ignore the config option
and treat core.multiPackIndex as enabled.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2020-09-25 12:33:34 +00:00
committed by Junio C Hamano
parent 3e220e6069
commit 18e449f86b
4 changed files with 13 additions and 10 deletions
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6
repo-settings.c
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@ -1,6 +1,7 @@
#include "cache.h"
#include "config.h"
#include "repository.h"
#include "midx.h"
#define UPDATE_DEFAULT_BOOL(s,v) do { if (s == -1) { s = v; } } while(0)
@ -47,6 +48,11 @@ void prepare_repo_settings(struct repository *r)
r->settings.pack_use_sparse = value;
UPDATE_DEFAULT_BOOL(r->settings.pack_use_sparse, 1);
value = git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0);
if (value || !repo_config_get_bool(r, "core.multipackindex", &value))
r->settings.core_multi_pack_index = value;
UPDATE_DEFAULT_BOOL(r->settings.core_multi_pack_index, 1);
if (!repo_config_get_bool(r, "feature.manyfiles", &value) && value) {
UPDATE_DEFAULT_BOOL(r->settings.index_version, 4);
UPDATE_DEFAULT_BOOL(r->settings.core_untracked_cache, UNTRACKED_CACHE_WRITE);