diff options
| -rw-r--r-- | Documentation/config/feature.txt | 14 | ||||
| -rw-r--r-- | Documentation/config/fetch.txt | 3 | ||||
| -rw-r--r-- | Documentation/config/pack.txt | 3 | ||||
| -rw-r--r-- | fetch-negotiator.c | 25 | ||||
| -rw-r--r-- | fetch-negotiator.h | 5 | ||||
| -rw-r--r-- | fetch-pack.c | 11 | ||||
| -rw-r--r-- | repo-settings.c | 13 | ||||
| -rw-r--r-- | repository.h | 8 | ||||
| -rwxr-xr-x | t/t5552-skipping-fetch-negotiator.sh | 23 |
9 files changed, 60 insertions, 45 deletions
diff --git a/Documentation/config/feature.txt b/Documentation/config/feature.txt index 8ea198a642..545522f306 100644 --- a/Documentation/config/feature.txt +++ b/Documentation/config/feature.txt @@ -4,6 +4,20 @@ feature.*:: developer community as recommended defaults and are subject to change. In particular, new config options may be added with different defaults. +feature.experimental:: + Enable config options that are new to Git, and are being considered for + future defaults. Config settings included here may be added or removed + with each release, including minor version updates. These settings may + have unintended interactions since they are so new. Please enable this + setting if you are interested in providing feedback on experimental + features. The new default values are: ++ +* `pack.useSparse=true` uses a new algorithm when constructing a pack-file +which can improve `git push` performance in repos with many files. ++ +* `fetch.negotiationAlgorithm=skipping` may improve fetch negotiation times by +skipping more commits at a time, reducing the number of round trips. + feature.manyFiles:: Enable config options that optimize for repos with many files in the working directory. With many files, commands such as `git status` and diff --git a/Documentation/config/fetch.txt b/Documentation/config/fetch.txt index ba890b5884..d402110638 100644 --- a/Documentation/config/fetch.txt +++ b/Documentation/config/fetch.txt @@ -59,7 +59,8 @@ fetch.negotiationAlgorithm:: effort to converge faster, but may result in a larger-than-necessary packfile; The default is "default" which instructs Git to use the default algorithm that never skips commits (unless the server has acknowledged it or one - of its descendants). + of its descendants). If `feature.experimental` is enabled, then this + setting defaults to "skipping". Unknown values will cause 'git fetch' to error out. + See also the `--negotiation-tip` option for linkgit:git-fetch[1]. diff --git a/Documentation/config/pack.txt b/Documentation/config/pack.txt index 9cdcfa7324..1d66f0c992 100644 --- a/Documentation/config/pack.txt +++ b/Documentation/config/pack.txt @@ -112,7 +112,8 @@ pack.useSparse:: objects. This can have significant performance benefits when computing a pack to send a small change. However, it is possible that extra objects are added to the pack-file if the included - commits contain certain types of direct renames. + commits contain certain types of direct renames. Default is `false` + unless `feature.experimental` is enabled. pack.writeBitmaps (deprecated):: This is a deprecated synonym for `repack.writeBitmaps`. diff --git a/fetch-negotiator.c b/fetch-negotiator.c index d6d685cba0..0a1357dc9d 100644 --- a/fetch-negotiator.c +++ b/fetch-negotiator.c @@ -2,19 +2,20 @@ #include "fetch-negotiator.h" #include "negotiator/default.h" #include "negotiator/skipping.h" +#include "repository.h" -void fetch_negotiator_init(struct fetch_negotiator *negotiator, - const char *algorithm) +void fetch_negotiator_init(struct repository *r, + struct fetch_negotiator *negotiator) { - if (algorithm) { - if (!strcmp(algorithm, "skipping")) { - skipping_negotiator_init(negotiator); - return; - } else if (!strcmp(algorithm, "default")) { - /* Fall through to default initialization */ - } else { - die("unknown fetch negotiation algorithm '%s'", algorithm); - } + prepare_repo_settings(r); + switch(r->settings.fetch_negotiation_algorithm) { + case FETCH_NEGOTIATION_SKIPPING: + skipping_negotiator_init(negotiator); + return; + + case FETCH_NEGOTIATION_DEFAULT: + default: + default_negotiator_init(negotiator); + return; } - default_negotiator_init(negotiator); } diff --git a/fetch-negotiator.h b/fetch-negotiator.h index 9e3967ce66..ea78868504 100644 --- a/fetch-negotiator.h +++ b/fetch-negotiator.h @@ -2,6 +2,7 @@ #define FETCH_NEGOTIATOR_H struct commit; +struct repository; /* * An object that supplies the information needed to negotiate the contents of @@ -52,7 +53,7 @@ struct fetch_negotiator { void *data; }; -void fetch_negotiator_init(struct fetch_negotiator *negotiator, - const char *algorithm); +void fetch_negotiator_init(struct repository *r, + struct fetch_negotiator *negotiator); #endif diff --git a/fetch-pack.c b/fetch-pack.c index 65be043f2a..d81f47c07b 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -36,7 +36,6 @@ static int agent_supported; static int server_supports_filtering; static struct lock_file shallow_lock; static const char *alternate_shallow_file; -static char *negotiation_algorithm; static struct strbuf fsck_msg_types = STRBUF_INIT; /* Remember to update object flag allocation in object.h */ @@ -892,12 +891,13 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, struct shallow_info *si, char **pack_lockfile) { + struct repository *r = the_repository; struct ref *ref = copy_ref_list(orig_ref); struct object_id oid; const char *agent_feature; int agent_len; struct fetch_negotiator negotiator; - fetch_negotiator_init(&negotiator, negotiation_algorithm); + fetch_negotiator_init(r, &negotiator); sort_ref_list(&ref, ref_compare_name); QSORT(sought, nr_sought, cmp_ref_by_name); @@ -911,7 +911,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, if (server_supports("shallow")) print_verbose(args, _("Server supports %s"), "shallow"); - else if (args->depth > 0 || is_repository_shallow(the_repository)) + else if (args->depth > 0 || is_repository_shallow(r)) die(_("Server does not support shallow clients")); if (args->depth > 0 || args->deepen_since || args->deepen_not) args->deepen = 1; @@ -1379,6 +1379,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, struct shallow_info *si, char **pack_lockfile) { + struct repository *r = the_repository; struct ref *ref = copy_ref_list(orig_ref); enum fetch_state state = FETCH_CHECK_LOCAL; struct oidset common = OIDSET_INIT; @@ -1386,7 +1387,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, int in_vain = 0; int haves_to_send = INITIAL_FLUSH; struct fetch_negotiator negotiator; - fetch_negotiator_init(&negotiator, negotiation_algorithm); + fetch_negotiator_init(r, &negotiator); packet_reader_init(&reader, fd[0], NULL, 0, PACKET_READ_CHOMP_NEWLINE | PACKET_READ_DIE_ON_ERR_PACKET); @@ -1505,8 +1506,6 @@ static void fetch_pack_config(void) git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta); git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects); git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects); - git_config_get_string("fetch.negotiationalgorithm", - &negotiation_algorithm); git_config(fetch_pack_config_cb, NULL); } diff --git a/repo-settings.c b/repo-settings.c index d5bf9069f4..3779b85c17 100644 --- a/repo-settings.c +++ b/repo-settings.c @@ -36,16 +36,29 @@ void prepare_repo_settings(struct repository *r) free(strval); } + if (!repo_config_get_string(r, "fetch.negotiationalgorithm", &strval)) { + if (!strcasecmp(strval, "skipping")) + r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_SKIPPING; + else + r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_DEFAULT; + } + if (!repo_config_get_bool(r, "pack.usesparse", &value)) r->settings.pack_use_sparse = value; 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); } + if (!repo_config_get_bool(r, "feature.experimental", &value) && value) { + UPDATE_DEFAULT_BOOL(r->settings.pack_use_sparse, 1); + UPDATE_DEFAULT_BOOL(r->settings.fetch_negotiation_algorithm, FETCH_NEGOTIATION_SKIPPING); + } /* Hack for test programs like test-dump-untracked-cache */ if (ignore_untracked_cache_config) r->settings.core_untracked_cache = UNTRACKED_CACHE_KEEP; else UPDATE_DEFAULT_BOOL(r->settings.core_untracked_cache, UNTRACKED_CACHE_KEEP); + + UPDATE_DEFAULT_BOOL(r->settings.fetch_negotiation_algorithm, FETCH_NEGOTIATION_DEFAULT); } diff --git a/repository.h b/repository.h index cf7ff0778c..4da275e73f 100644 --- a/repository.h +++ b/repository.h @@ -18,6 +18,13 @@ enum untracked_cache_setting { UNTRACKED_CACHE_WRITE = 2 }; +enum fetch_negotiation_setting { + FETCH_NEGOTIATION_UNSET = -1, + FETCH_NEGOTIATION_NONE = 0, + FETCH_NEGOTIATION_DEFAULT = 1, + FETCH_NEGOTIATION_SKIPPING = 2, +}; + struct repo_settings { int initialized; @@ -28,6 +35,7 @@ struct repo_settings { enum untracked_cache_setting core_untracked_cache; int pack_use_sparse; + enum fetch_negotiation_setting fetch_negotiation_algorithm; }; struct repository { diff --git a/t/t5552-skipping-fetch-negotiator.sh b/t/t5552-skipping-fetch-negotiator.sh index 8a14be51a1..f70cbcc9ca 100755 --- a/t/t5552-skipping-fetch-negotiator.sh +++ b/t/t5552-skipping-fetch-negotiator.sh @@ -60,29 +60,6 @@ test_expect_success 'commits with no parents are sent regardless of skip distanc have_not_sent c6 c4 c3 ' -test_expect_success 'unknown fetch.negotiationAlgorithm values error out' ' - rm -rf server client trace && - git init server && - test_commit -C server to_fetch && - - git init client && - test_commit -C client on_client && - git -C client checkout on_client && - - test_config -C client fetch.negotiationAlgorithm invalid && - test_must_fail git -C client fetch "$(pwd)/server" 2>err && - test_i18ngrep "unknown fetch negotiation algorithm" err && - - # Explicit "default" value - test_config -C client fetch.negotiationAlgorithm default && - git -C client -c fetch.negotiationAlgorithm=default fetch "$(pwd)/server" && - - # Implementation detail: If there is nothing to fetch, we will not error out - test_config -C client fetch.negotiationAlgorithm invalid && - git -C client fetch "$(pwd)/server" 2>err && - test_i18ngrep ! "unknown fetch negotiation algorithm" err -' - test_expect_success 'when two skips collide, favor the larger one' ' rm -rf server client trace && git init server && |