mirrors/git
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

builtin/repack.c: support generating a cruft pack

Browse Source 
Expose a way to split the contents of a repository into a main and cruft
pack when doing an all-into-one repack with `git repack --cruft -d`, and
a complementary configuration variable.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau
2022-05-20 19:18:03 -04:00
committed by Junio C Hamano
parent a7d493833f
commit f9825d1cf7
4 changed files with 319 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

105
builtin/repack.c
View File

@ -18,12 +18,18 @@
#include "pack-bitmap.h"
#include "refs.h"
#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2
#define PACK_CRUFT 4
static int pack_everything;
static int delta_base_offset = 1;
static int pack_kept_objects = -1;
static int write_bitmaps = -1;
static int use_delta_islands;
static int run_update_server_info = 1;
static char *packdir, *packtmp_name, *packtmp;
static char *cruft_expiration;
static const char *const git_repack_usage[] = {
N_("git repack [<options>]"),
@ -305,9 +311,6 @@ static void repack_promisor_objects(const struct pack_objects_args *args,
die(_("could not finish pack-objects to repack promisor objects"));
}
#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2
struct pack_geometry {
struct packed_git **pack;
uint32_t pack_nr, pack_alloc;
@ -344,6 +347,8 @@ static void init_pack_geometry(struct pack_geometry **geometry_p)
for (p = get_all_packs(the_repository); p; p = p->next) {
if (!pack_kept_objects && p->pack_keep)
continue;
if (p->is_cruft)
continue;
ALLOC_GROW(geometry->pack,
geometry->pack_nr + 1,
@ -605,6 +610,67 @@ static int write_midx_included_packs(struct string_list *include,
return finish_command(&cmd);
}
static int write_cruft_pack(const struct pack_objects_args *args,
const char *pack_prefix,
struct string_list *names,
struct string_list *existing_packs,
struct string_list *existing_kept_packs)
{
struct child_process cmd = CHILD_PROCESS_INIT;
struct strbuf line = STRBUF_INIT;
struct string_list_item *item;
FILE *in, *out;
int ret;
prepare_pack_objects(&cmd, args);
strvec_push(&cmd.args, "--cruft");
if (cruft_expiration)
strvec_pushf(&cmd.args, "--cruft-expiration=%s",
cruft_expiration);
strvec_push(&cmd.args, "--honor-pack-keep");
strvec_push(&cmd.args, "--non-empty");
strvec_push(&cmd.args, "--max-pack-size=0");
cmd.in = -1;
ret = start_command(&cmd);
if (ret)
return ret;
/*
* names has a confusing double use: it both provides the list
* of just-written new packs, and accepts the name of the cruft
* pack we are writing.
*
* By the time it is read here, it contains only the pack(s)
* that were just written, which is exactly the set of packs we
* want to consider kept.
*/
in = xfdopen(cmd.in, "w");
for_each_string_list_item(item, names)
fprintf(in, "%s-%s.pack\n", pack_prefix, item->string);
for_each_string_list_item(item, existing_packs)
fprintf(in, "-%s.pack\n", item->string);
for_each_string_list_item(item, existing_kept_packs)
fprintf(in, "%s.pack\n", item->string);
fclose(in);
out = xfdopen(cmd.out, "r");
while (strbuf_getline_lf(&line, out) != EOF) {
if (line.len != the_hash_algo->hexsz)
die(_("repack: Expecting full hex object ID lines only "
"from pack-objects."));
string_list_append(names, line.buf);
}
fclose(out);
strbuf_release(&line);
return finish_command(&cmd);
}
int cmd_repack(int argc, const char **argv, const char *prefix)
{
struct child_process cmd = CHILD_PROCESS_INIT;
@ -621,7 +687,6 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
int show_progress;
/* variables to be filled by option parsing */
int pack_everything = 0;
int delete_redundant = 0;
const char *unpack_unreachable = NULL;
int keep_unreachable = 0;
@ -636,6 +701,11 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
OPT_BIT('A', NULL, &pack_everything,
N_("same as -a, and turn unreachable objects loose"),
LOOSEN_UNREACHABLE | ALL_INTO_ONE),
OPT_BIT(0, "cruft", &pack_everything,
N_("same as -a, pack unreachable cruft objects separately"),
PACK_CRUFT),
OPT_STRING(0, "cruft-expiration", &cruft_expiration, N_("approxidate"),
N_("with -C, expire objects older than this")),
OPT_BOOL('d', NULL, &delete_redundant,
N_("remove redundant packs, and run git-prune-packed")),
OPT_BOOL('f', NULL, &po_args.no_reuse_delta,
@ -688,6 +758,15 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
(unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE)))
die(_("options '%s' and '%s' cannot be used together"), "--keep-unreachable", "-A");
if (pack_everything & PACK_CRUFT) {
pack_everything |= ALL_INTO_ONE;
if (unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE))
die(_("options '%s' and '%s' cannot be used together"), "--cruft", "-A");
if (keep_unreachable)
die(_("options '%s' and '%s' cannot be used together"), "--cruft", "-k");
}
if (write_bitmaps < 0) {
if (!write_midx &&
(!(pack_everything & ALL_INTO_ONE) || !is_bare_repository()))
@ -771,7 +850,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
if (pack_everything & ALL_INTO_ONE) {
repack_promisor_objects(&po_args, &names);
if (existing_nonkept_packs.nr && delete_redundant) {
if (existing_nonkept_packs.nr && delete_redundant &&
!(pack_everything & PACK_CRUFT)) {
for_each_string_list_item(item, &names) {
strvec_pushf(&cmd.args, "--keep-pack=%s-%s.pack",
packtmp_name, item->string);
@ -833,6 +913,21 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
if (!names.nr && !po_args.quiet)
printf_ln(_("Nothing new to pack."));
if (pack_everything & PACK_CRUFT) {
const char *pack_prefix;
if (!skip_prefix(packtmp, packdir, &pack_prefix))
die(_("pack prefix %s does not begin with objdir %s"),
packtmp, packdir);
if (*pack_prefix == '/')
pack_prefix++;
ret = write_cruft_pack(&po_args, pack_prefix, &names,
&existing_nonkept_packs,
&existing_kept_packs);
if (ret)
return ret;
}
for_each_string_list_item(item, &names) {
item->util = (void *)(uintptr_t)populate_pack_exts(item->string);
}