зеркало из https://github.com/microsoft/git.git
Merge branch 'tb/geom-repack-with-keep-and-max'
Teach "git repack --geometric" work better with "--keep-pack" and avoid corrupting the repository when packsize limit is used. * tb/geom-repack-with-keep-and-max: builtin/repack.c: ensure that `names` is sorted t7703: demonstrate object corruption with pack.packSizeLimit repack: respect --keep-pack with geometric repack
This commit is contained in:
Junio C Hamano
Коммит
16a0e92ddc
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@ -137,6 +137,8 @@ static void collect_pack_filenames(struct string_list *fname_nonkept_list,
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string_list_append_nodup(fname_nonkept_list, fname);
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}
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closedir(dir);
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string_list_sort(fname_kept_list);
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}
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static void remove_redundant_pack(const char *dir_name, const char *base_name)
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@ -332,17 +334,38 @@ static int geometry_cmp(const void *va, const void *vb)
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return 0;
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}
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static void init_pack_geometry(struct pack_geometry **geometry_p)
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static void init_pack_geometry(struct pack_geometry **geometry_p,
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struct string_list *existing_kept_packs)
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{
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struct packed_git *p;
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struct pack_geometry *geometry;
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struct strbuf buf = STRBUF_INIT;
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*geometry_p = xcalloc(1, sizeof(struct pack_geometry));
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geometry = *geometry_p;
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for (p = get_all_packs(the_repository); p; p = p->next) {
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if (!pack_kept_objects && p->pack_keep)
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continue;
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if (!pack_kept_objects) {
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/*
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* Any pack that has its pack_keep bit set will appear
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* in existing_kept_packs below, but this saves us from
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* doing a more expensive check.
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*/
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if (p->pack_keep)
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continue;
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/*
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* The pack may be kept via the --keep-pack option;
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* check 'existing_kept_packs' to determine whether to
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* ignore it.
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*/
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strbuf_reset(&buf);
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strbuf_addstr(&buf, pack_basename(p));
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strbuf_strip_suffix(&buf, ".pack");
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if (string_list_has_string(existing_kept_packs, buf.buf))
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continue;
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}
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ALLOC_GROW(geometry->pack,
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geometry->pack_nr + 1,
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@ -353,6 +376,7 @@ static void init_pack_geometry(struct pack_geometry **geometry_p)
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}
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QSORT(geometry->pack, geometry->pack_nr, geometry_cmp);
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strbuf_release(&buf);
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}
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static void split_pack_geometry(struct pack_geometry *geometry, int factor)
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@ -714,17 +738,20 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
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strbuf_release(&path);
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}
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if (geometric_factor) {
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if (pack_everything)
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die(_("options '%s' and '%s' cannot be used together"), "--geometric", "-A/-a");
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init_pack_geometry(&geometry);
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split_pack_geometry(geometry, geometric_factor);
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}
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packdir = mkpathdup("%s/pack", get_object_directory());
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packtmp_name = xstrfmt(".tmp-%d-pack", (int)getpid());
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packtmp = mkpathdup("%s/%s", packdir, packtmp_name);
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collect_pack_filenames(&existing_nonkept_packs, &existing_kept_packs,
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&keep_pack_list);
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if (geometric_factor) {
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if (pack_everything)
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die(_("options '%s' and '%s' cannot be used together"), "--geometric", "-A/-a");
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init_pack_geometry(&geometry, &existing_kept_packs);
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split_pack_geometry(geometry, geometric_factor);
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}
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sigchain_push_common(remove_pack_on_signal);
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prepare_pack_objects(&cmd, &po_args);
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@ -764,9 +791,6 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
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if (use_delta_islands)
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strvec_push(&cmd.args, "--delta-islands");
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collect_pack_filenames(&existing_nonkept_packs, &existing_kept_packs,
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&keep_pack_list);
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if (pack_everything & ALL_INTO_ONE) {
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repack_promisor_objects(&po_args, &names);
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@ -832,6 +856,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
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if (!names.nr && !po_args.quiet)
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printf_ln(_("Nothing new to pack."));
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string_list_sort(&names);
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for_each_string_list_item(item, &names) {
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item->util = (void *)(uintptr_t)populate_pack_exts(item->string);
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}
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@ -872,7 +898,6 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
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if (delete_redundant && pack_everything & ALL_INTO_ONE) {
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const int hexsz = the_hash_algo->hexsz;
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string_list_sort(&names);
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for_each_string_list_item(item, &existing_nonkept_packs) {
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char *sha1;
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size_t len = strlen(item->string);
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@ -7,6 +7,7 @@ test_description='git repack --geometric works correctly'
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GIT_TEST_MULTI_PACK_INDEX=0
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objdir=.git/objects
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packdir=$objdir/pack
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midx=$objdir/pack/multi-pack-index
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test_expect_success '--geometric with no packs' '
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@ -180,6 +181,34 @@ test_expect_success '--geometric ignores kept packs' '
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)
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'
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test_expect_success '--geometric ignores --keep-pack packs' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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(
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cd geometric &&
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# Create two equal-sized packs
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test_commit kept && # 3 objects
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git repack -d &&
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test_commit pack && # 3 objects
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git repack -d &&
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find $objdir/pack -type f -name "*.pack" | sort >packs.before &&
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git repack --geometric 2 -dm \
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--keep-pack="$(basename "$(head -n 1 packs.before)")" >out &&
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find $objdir/pack -type f -name "*.pack" | sort >packs.after &&
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# Packs should not have changed (only one non-kept pack, no
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# loose objects), but $midx should now exist.
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grep "Nothing new to pack" out &&
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test_path_is_file $midx &&
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test_cmp packs.before packs.after &&
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git fsck
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)
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'
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test_expect_success '--geometric chooses largest MIDX preferred pack' '
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git init geometric &&
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test_when_finished "rm -fr geometric" &&
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@ -202,4 +231,50 @@ test_expect_success '--geometric chooses largest MIDX preferred pack' '
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)
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'
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test_expect_success '--geometric with pack.packSizeLimit' '
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git init pack-rewrite &&
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test_when_finished "rm -fr pack-rewrite" &&
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(
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cd pack-rewrite &&
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test-tool genrandom foo 1048576 >foo &&
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test-tool genrandom bar 1048576 >bar &&
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git add foo bar &&
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test_tick &&
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git commit -m base &&
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git rev-parse HEAD:foo HEAD:bar >p1.objects &&
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git rev-parse HEAD HEAD^{tree} >p2.objects &&
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# These two packs each contain two objects, so the following
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# `--geometric` repack will try to combine them.
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p1="$(git pack-objects $packdir/pack <p1.objects)" &&
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p2="$(git pack-objects $packdir/pack <p2.objects)" &&
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# Remove any loose objects in packs, since we do not want extra
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# copies around (which would mask over potential object
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# corruption issues).
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git prune-packed &&
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# Both p1 and p2 will be rolled up, but pack-objects will write
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# three packs:
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#
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# - one containing object "foo",
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# - another containing object "bar",
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# - a final pack containing the commit and tree objects
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# (identical to p2 above)
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git repack --geometric 2 -d --max-pack-size=1048576 &&
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# Ensure `repack` can detect that the third pack it wrote
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# (containing just the tree and commit objects) was identical to
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# one that was below the geometric split, so that we can save it
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# from deletion.
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#
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# If `repack` fails to do that, we will incorrectly delete p2,
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# causing object corruption.
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git fsck
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)
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'
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test_done
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