git/repo-settings.c
Taylor Blau 23c1e71369 pack-objects: enable multi-pack reuse via feature.experimental
Now that multi-pack reuse is supported, enable it via the
feature.experimental configuration in addition to the classic
`pack.allowPackReuse`.

This will allow more users to experiment with the new behavior who might
not otherwise be aware of the existing `pack.allowPackReuse`
configuration option.

The enum with values NO_PACK_REUSE, SINGLE_PACK_REUSE, and
MULTI_PACK_REUSE is defined statically in builtin/pack-objects.c's
compilation unit. We could hoist that enum into a scope visible from the
repository_settings struct, and then use that enum value in
pack-objects. Instead, define a single int that indicates what
pack-objects's default value should be to avoid additional unnecessary
code movement.

Though `feature.experimental` implies `pack.allowPackReuse=multi`, this
can still be overridden by explicitly setting the latter configuration
to either "single" or "false". Tests covering all of these cases are
showin t5332.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-02-05 15:27:01 -08:00

123 lines
4.3 KiB
C

#include "git-compat-util.h"
#include "config.h"
#include "repository.h"
#include "midx.h"
static void repo_cfg_bool(struct repository *r, const char *key, int *dest,
int def)
{
if (repo_config_get_bool(r, key, dest))
*dest = def;
}
static void repo_cfg_int(struct repository *r, const char *key, int *dest,
int def)
{
if (repo_config_get_int(r, key, dest))
*dest = def;
}
void prepare_repo_settings(struct repository *r)
{
int experimental;
int value;
const char *strval;
int manyfiles;
if (!r->gitdir)
BUG("Cannot add settings for uninitialized repository");
if (r->settings.initialized++)
return;
/* Defaults */
r->settings.index_version = -1;
r->settings.core_untracked_cache = UNTRACKED_CACHE_KEEP;
r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE;
/* Booleans config or default, cascades to other settings */
repo_cfg_bool(r, "feature.manyfiles", &manyfiles, 0);
repo_cfg_bool(r, "feature.experimental", &experimental, 0);
/* Defaults modified by feature.* */
if (experimental) {
r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_SKIPPING;
r->settings.pack_use_bitmap_boundary_traversal = 1;
r->settings.pack_use_multi_pack_reuse = 1;
}
if (manyfiles) {
r->settings.index_version = 4;
r->settings.index_skip_hash = 1;
r->settings.core_untracked_cache = UNTRACKED_CACHE_WRITE;
}
/* Commit graph config or default, does not cascade (simple) */
repo_cfg_bool(r, "core.commitgraph", &r->settings.core_commit_graph, 1);
repo_cfg_int(r, "commitgraph.generationversion", &r->settings.commit_graph_generation_version, 2);
repo_cfg_bool(r, "commitgraph.readchangedpaths", &r->settings.commit_graph_read_changed_paths, 1);
repo_cfg_bool(r, "gc.writecommitgraph", &r->settings.gc_write_commit_graph, 1);
repo_cfg_bool(r, "fetch.writecommitgraph", &r->settings.fetch_write_commit_graph, 0);
/* Boolean config or default, does not cascade (simple) */
repo_cfg_bool(r, "pack.usesparse", &r->settings.pack_use_sparse, 1);
repo_cfg_bool(r, "core.multipackindex", &r->settings.core_multi_pack_index, 1);
repo_cfg_bool(r, "index.sparse", &r->settings.sparse_index, 0);
repo_cfg_bool(r, "index.skiphash", &r->settings.index_skip_hash, r->settings.index_skip_hash);
repo_cfg_bool(r, "pack.readreverseindex", &r->settings.pack_read_reverse_index, 1);
repo_cfg_bool(r, "pack.usebitmapboundarytraversal",
&r->settings.pack_use_bitmap_boundary_traversal,
r->settings.pack_use_bitmap_boundary_traversal);
repo_cfg_bool(r, "core.usereplacerefs", &r->settings.read_replace_refs, 1);
/*
* The GIT_TEST_MULTI_PACK_INDEX variable is special in that
* either it *or* the config sets
* r->settings.core_multi_pack_index if true. We don't take
* the environment variable if it exists (even if false) over
* any config, as in most other cases.
*/
if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0))
r->settings.core_multi_pack_index = 1;
/*
* Non-boolean config
*/
if (!repo_config_get_int(r, "index.version", &value))
r->settings.index_version = value;
if (!repo_config_get_string_tmp(r, "core.untrackedcache", &strval)) {
int v = git_parse_maybe_bool(strval);
/*
* If it's set to "keep", or some other non-boolean
* value then "v < 0". Then we do nothing and keep it
* at the default of UNTRACKED_CACHE_KEEP.
*/
if (v >= 0)
r->settings.core_untracked_cache = v ?
UNTRACKED_CACHE_WRITE : UNTRACKED_CACHE_REMOVE;
}
if (!repo_config_get_string_tmp(r, "fetch.negotiationalgorithm", &strval)) {
int fetch_default = r->settings.fetch_negotiation_algorithm;
if (!strcasecmp(strval, "skipping"))
r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_SKIPPING;
else if (!strcasecmp(strval, "noop"))
r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_NOOP;
else if (!strcasecmp(strval, "consecutive"))
r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE;
else if (!strcasecmp(strval, "default"))
r->settings.fetch_negotiation_algorithm = fetch_default;
else
die("unknown fetch negotiation algorithm '%s'", strval);
}
/*
* This setting guards all index reads to require a full index
* over a sparse index. After suitable guards are placed in the
* codebase around uses of the index, this setting will be
* removed.
*/
r->settings.command_requires_full_index = 1;
}