git/builtin/repack.c
Ævar Arnfjörð Bjarmason 06f5f8940c cocci: generalize "unused" rule to cover more than "strbuf"
Generalize the newly added "unused.cocci" rule to find more than just
"struct strbuf", let's have it find the same unused patterns for
"struct string_list", as well as other code that uses
similar-looking *_{release,clear,free}() and {release,clear,free}_*()
functions.

We're intentionally loose in accepting e.g. a "strbuf_init(&sb)"
followed by a "string_list_clear(&sb, 0)".  It's assumed that the
compiler will catch any such invalid code, i.e. that our
constructors/destructors don't take a "void *".

See [1] for example of code that would be covered by the
"get_worktrees()" part of this rule. We'd still need work that the
series is based on (we were passing "worktrees" to a function), but
could now do the change in [1] automatically.

1. https://lore.kernel.org/git/Yq6eJFUPPTv%2Fzc0o@coredump.intra.peff.net/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-06 12:24:43 -07:00

1126 lines
31 KiB
C

#include "builtin.h"
#include "cache.h"
#include "config.h"
#include "dir.h"
#include "parse-options.h"
#include "run-command.h"
#include "sigchain.h"
#include "strbuf.h"
#include "string-list.h"
#include "strvec.h"
#include "midx.h"
#include "packfile.h"
#include "prune-packed.h"
#include "object-store.h"
#include "promisor-remote.h"
#include "shallow.h"
#include "pack.h"
#include "pack-bitmap.h"
#include "refs.h"
#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2
#define PACK_CRUFT 4
#define DELETE_PACK 1
#define CRUFT_PACK 2
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>]"),
NULL
};
static const char incremental_bitmap_conflict_error[] = N_(
"Incremental repacks are incompatible with bitmap indexes. Use\n"
"--no-write-bitmap-index or disable the pack.writeBitmaps configuration."
);
struct pack_objects_args {
const char *window;
const char *window_memory;
const char *depth;
const char *threads;
const char *max_pack_size;
int no_reuse_delta;
int no_reuse_object;
int quiet;
int local;
};
static int repack_config(const char *var, const char *value, void *cb)
{
struct pack_objects_args *cruft_po_args = cb;
if (!strcmp(var, "repack.usedeltabaseoffset")) {
delta_base_offset = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "repack.packkeptobjects")) {
pack_kept_objects = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "repack.writebitmaps") ||
!strcmp(var, "pack.writebitmaps")) {
write_bitmaps = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "repack.usedeltaislands")) {
use_delta_islands = git_config_bool(var, value);
return 0;
}
if (strcmp(var, "repack.updateserverinfo") == 0) {
run_update_server_info = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "repack.cruftwindow"))
return git_config_string(&cruft_po_args->window, var, value);
if (!strcmp(var, "repack.cruftwindowmemory"))
return git_config_string(&cruft_po_args->window_memory, var, value);
if (!strcmp(var, "repack.cruftdepth"))
return git_config_string(&cruft_po_args->depth, var, value);
if (!strcmp(var, "repack.cruftthreads"))
return git_config_string(&cruft_po_args->threads, var, value);
return git_default_config(var, value, cb);
}
/*
* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
*/
static void remove_temporary_files(void)
{
struct strbuf buf = STRBUF_INIT;
size_t dirlen, prefixlen;
DIR *dir;
struct dirent *e;
dir = opendir(packdir);
if (!dir)
return;
/* Point at the slash at the end of ".../objects/pack/" */
dirlen = strlen(packdir) + 1;
strbuf_addstr(&buf, packtmp);
/* Hold the length of ".tmp-%d-pack-" */
prefixlen = buf.len - dirlen;
while ((e = readdir(dir))) {
if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
continue;
strbuf_setlen(&buf, dirlen);
strbuf_addstr(&buf, e->d_name);
unlink(buf.buf);
}
closedir(dir);
strbuf_release(&buf);
}
static void remove_pack_on_signal(int signo)
{
remove_temporary_files();
sigchain_pop(signo);
raise(signo);
}
/*
* Adds all packs hex strings to either fname_nonkept_list or
* fname_kept_list based on whether each pack has a corresponding
* .keep file or not. Packs without a .keep file are not to be kept
* if we are going to pack everything into one file.
*/
static void collect_pack_filenames(struct string_list *fname_nonkept_list,
struct string_list *fname_kept_list,
const struct string_list *extra_keep)
{
DIR *dir;
struct dirent *e;
char *fname;
if (!(dir = opendir(packdir)))
return;
while ((e = readdir(dir)) != NULL) {
size_t len;
int i;
if (!strip_suffix(e->d_name, ".pack", &len))
continue;
for (i = 0; i < extra_keep->nr; i++)
if (!fspathcmp(e->d_name, extra_keep->items[i].string))
break;
fname = xmemdupz(e->d_name, len);
if ((extra_keep->nr > 0 && i < extra_keep->nr) ||
(file_exists(mkpath("%s/%s.keep", packdir, fname)))) {
string_list_append_nodup(fname_kept_list, fname);
} else {
struct string_list_item *item;
item = string_list_append_nodup(fname_nonkept_list,
fname);
if (file_exists(mkpath("%s/%s.mtimes", packdir, fname)))
item->util = (void*)(uintptr_t)CRUFT_PACK;
}
}
closedir(dir);
string_list_sort(fname_kept_list);
}
static void remove_redundant_pack(const char *dir_name, const char *base_name)
{
struct strbuf buf = STRBUF_INIT;
struct multi_pack_index *m = get_local_multi_pack_index(the_repository);
strbuf_addf(&buf, "%s.pack", base_name);
if (m && midx_contains_pack(m, buf.buf))
clear_midx_file(the_repository);
strbuf_insertf(&buf, 0, "%s/", dir_name);
unlink_pack_path(buf.buf, 1);
strbuf_release(&buf);
}
static void prepare_pack_objects(struct child_process *cmd,
const struct pack_objects_args *args)
{
strvec_push(&cmd->args, "pack-objects");
if (args->window)
strvec_pushf(&cmd->args, "--window=%s", args->window);
if (args->window_memory)
strvec_pushf(&cmd->args, "--window-memory=%s", args->window_memory);
if (args->depth)
strvec_pushf(&cmd->args, "--depth=%s", args->depth);
if (args->threads)
strvec_pushf(&cmd->args, "--threads=%s", args->threads);
if (args->max_pack_size)
strvec_pushf(&cmd->args, "--max-pack-size=%s", args->max_pack_size);
if (args->no_reuse_delta)
strvec_pushf(&cmd->args, "--no-reuse-delta");
if (args->no_reuse_object)
strvec_pushf(&cmd->args, "--no-reuse-object");
if (args->local)
strvec_push(&cmd->args, "--local");
if (args->quiet)
strvec_push(&cmd->args, "--quiet");
if (delta_base_offset)
strvec_push(&cmd->args, "--delta-base-offset");
strvec_push(&cmd->args, packtmp);
cmd->git_cmd = 1;
cmd->out = -1;
}
/*
* Write oid to the given struct child_process's stdin, starting it first if
* necessary.
*/
static int write_oid(const struct object_id *oid, struct packed_git *pack,
uint32_t pos, void *data)
{
struct child_process *cmd = data;
if (cmd->in == -1) {
if (start_command(cmd))
die(_("could not start pack-objects to repack promisor objects"));
}
xwrite(cmd->in, oid_to_hex(oid), the_hash_algo->hexsz);
xwrite(cmd->in, "\n", 1);
return 0;
}
static struct {
const char *name;
unsigned optional:1;
} exts[] = {
{".pack"},
{".rev", 1},
{".mtimes", 1},
{".bitmap", 1},
{".promisor", 1},
{".idx"},
};
static unsigned populate_pack_exts(char *name)
{
struct stat statbuf;
struct strbuf path = STRBUF_INIT;
unsigned ret = 0;
int i;
for (i = 0; i < ARRAY_SIZE(exts); i++) {
strbuf_reset(&path);
strbuf_addf(&path, "%s-%s%s", packtmp, name, exts[i].name);
if (stat(path.buf, &statbuf))
continue;
ret |= (1 << i);
}
strbuf_release(&path);
return ret;
}
static void repack_promisor_objects(const struct pack_objects_args *args,
struct string_list *names)
{
struct child_process cmd = CHILD_PROCESS_INIT;
FILE *out;
struct strbuf line = STRBUF_INIT;
prepare_pack_objects(&cmd, args);
cmd.in = -1;
/*
* NEEDSWORK: Giving pack-objects only the OIDs without any ordering
* hints may result in suboptimal deltas in the resulting pack. See if
* the OIDs can be sent with fake paths such that pack-objects can use a
* {type -> existing pack order} ordering when computing deltas instead
* of a {type -> size} ordering, which may produce better deltas.
*/
for_each_packed_object(write_oid, &cmd,
FOR_EACH_OBJECT_PROMISOR_ONLY);
if (cmd.in == -1) {
/* No packed objects; cmd was never started */
child_process_clear(&cmd);
return;
}
close(cmd.in);
out = xfdopen(cmd.out, "r");
while (strbuf_getline_lf(&line, out) != EOF) {
struct string_list_item *item;
char *promisor_name;
if (line.len != the_hash_algo->hexsz)
die(_("repack: Expecting full hex object ID lines only from pack-objects."));
item = string_list_append(names, line.buf);
/*
* pack-objects creates the .pack and .idx files, but not the
* .promisor file. Create the .promisor file, which is empty.
*
* NEEDSWORK: fetch-pack sometimes generates non-empty
* .promisor files containing the ref names and associated
* hashes at the point of generation of the corresponding
* packfile, but this would not preserve their contents. Maybe
* concatenate the contents of all .promisor files instead of
* just creating a new empty file.
*/
promisor_name = mkpathdup("%s-%s.promisor", packtmp,
line.buf);
write_promisor_file(promisor_name, NULL, 0);
item->util = (void *)(uintptr_t)populate_pack_exts(item->string);
free(promisor_name);
}
fclose(out);
if (finish_command(&cmd))
die(_("could not finish pack-objects to repack promisor objects"));
}
struct pack_geometry {
struct packed_git **pack;
uint32_t pack_nr, pack_alloc;
uint32_t split;
};
static uint32_t geometry_pack_weight(struct packed_git *p)
{
if (open_pack_index(p))
die(_("cannot open index for %s"), p->pack_name);
return p->num_objects;
}
static int geometry_cmp(const void *va, const void *vb)
{
uint32_t aw = geometry_pack_weight(*(struct packed_git **)va),
bw = geometry_pack_weight(*(struct packed_git **)vb);
if (aw < bw)
return -1;
if (aw > bw)
return 1;
return 0;
}
static void init_pack_geometry(struct pack_geometry **geometry_p,
struct string_list *existing_kept_packs)
{
struct packed_git *p;
struct pack_geometry *geometry;
struct strbuf buf = STRBUF_INIT;
*geometry_p = xcalloc(1, sizeof(struct pack_geometry));
geometry = *geometry_p;
for (p = get_all_packs(the_repository); p; p = p->next) {
if (!pack_kept_objects) {
/*
* Any pack that has its pack_keep bit set will appear
* in existing_kept_packs below, but this saves us from
* doing a more expensive check.
*/
if (p->pack_keep)
continue;
/*
* The pack may be kept via the --keep-pack option;
* check 'existing_kept_packs' to determine whether to
* ignore it.
*/
strbuf_reset(&buf);
strbuf_addstr(&buf, pack_basename(p));
strbuf_strip_suffix(&buf, ".pack");
if (string_list_has_string(existing_kept_packs, buf.buf))
continue;
}
if (p->is_cruft)
continue;
ALLOC_GROW(geometry->pack,
geometry->pack_nr + 1,
geometry->pack_alloc);
geometry->pack[geometry->pack_nr] = p;
geometry->pack_nr++;
}
QSORT(geometry->pack, geometry->pack_nr, geometry_cmp);
strbuf_release(&buf);
}
static void split_pack_geometry(struct pack_geometry *geometry, int factor)
{
uint32_t i;
uint32_t split;
off_t total_size = 0;
if (!geometry->pack_nr) {
geometry->split = geometry->pack_nr;
return;
}
/*
* First, count the number of packs (in descending order of size) which
* already form a geometric progression.
*/
for (i = geometry->pack_nr - 1; i > 0; i--) {
struct packed_git *ours = geometry->pack[i];
struct packed_git *prev = geometry->pack[i - 1];
if (unsigned_mult_overflows(factor, geometry_pack_weight(prev)))
die(_("pack %s too large to consider in geometric "
"progression"),
prev->pack_name);
if (geometry_pack_weight(ours) < factor * geometry_pack_weight(prev))
break;
}
split = i;
if (split) {
/*
* Move the split one to the right, since the top element in the
* last-compared pair can't be in the progression. Only do this
* when we split in the middle of the array (otherwise if we got
* to the end, then the split is in the right place).
*/
split++;
}
/*
* Then, anything to the left of 'split' must be in a new pack. But,
* creating that new pack may cause packs in the heavy half to no longer
* form a geometric progression.
*
* Compute an expected size of the new pack, and then determine how many
* packs in the heavy half need to be joined into it (if any) to restore
* the geometric progression.
*/
for (i = 0; i < split; i++) {
struct packed_git *p = geometry->pack[i];
if (unsigned_add_overflows(total_size, geometry_pack_weight(p)))
die(_("pack %s too large to roll up"), p->pack_name);
total_size += geometry_pack_weight(p);
}
for (i = split; i < geometry->pack_nr; i++) {
struct packed_git *ours = geometry->pack[i];
if (unsigned_mult_overflows(factor, total_size))
die(_("pack %s too large to roll up"), ours->pack_name);
if (geometry_pack_weight(ours) < factor * total_size) {
if (unsigned_add_overflows(total_size,
geometry_pack_weight(ours)))
die(_("pack %s too large to roll up"),
ours->pack_name);
split++;
total_size += geometry_pack_weight(ours);
} else
break;
}
geometry->split = split;
}
static struct packed_git *get_largest_active_pack(struct pack_geometry *geometry)
{
if (!geometry) {
/*
* No geometry means either an all-into-one repack (in which
* case there is only one pack left and it is the largest) or an
* incremental one.
*
* If repacking incrementally, then we could check the size of
* all packs to determine which should be preferred, but leave
* this for later.
*/
return NULL;
}
if (geometry->split == geometry->pack_nr)
return NULL;
return geometry->pack[geometry->pack_nr - 1];
}
static void clear_pack_geometry(struct pack_geometry *geometry)
{
if (!geometry)
return;
free(geometry->pack);
geometry->pack_nr = 0;
geometry->pack_alloc = 0;
geometry->split = 0;
}
struct midx_snapshot_ref_data {
struct tempfile *f;
struct oidset seen;
int preferred;
};
static int midx_snapshot_ref_one(const char *refname,
const struct object_id *oid,
int flag, void *_data)
{
struct midx_snapshot_ref_data *data = _data;
struct object_id peeled;
if (!peel_iterated_oid(oid, &peeled))
oid = &peeled;
if (oidset_insert(&data->seen, oid))
return 0; /* already seen */
if (oid_object_info(the_repository, oid, NULL) != OBJ_COMMIT)
return 0;
fprintf(data->f->fp, "%s%s\n", data->preferred ? "+" : "",
oid_to_hex(oid));
return 0;
}
static void midx_snapshot_refs(struct tempfile *f)
{
struct midx_snapshot_ref_data data;
const struct string_list *preferred = bitmap_preferred_tips(the_repository);
data.f = f;
data.preferred = 0;
oidset_init(&data.seen, 0);
if (!fdopen_tempfile(f, "w"))
die(_("could not open tempfile %s for writing"),
get_tempfile_path(f));
if (preferred) {
struct string_list_item *item;
data.preferred = 1;
for_each_string_list_item(item, preferred)
for_each_ref_in(item->string, midx_snapshot_ref_one, &data);
data.preferred = 0;
}
for_each_ref(midx_snapshot_ref_one, &data);
if (close_tempfile_gently(f)) {
int save_errno = errno;
delete_tempfile(&f);
errno = save_errno;
die_errno(_("could not close refs snapshot tempfile"));
}
oidset_clear(&data.seen);
}
static void midx_included_packs(struct string_list *include,
struct string_list *existing_nonkept_packs,
struct string_list *existing_kept_packs,
struct string_list *names,
struct pack_geometry *geometry)
{
struct string_list_item *item;
for_each_string_list_item(item, existing_kept_packs)
string_list_insert(include, xstrfmt("%s.idx", item->string));
for_each_string_list_item(item, names)
string_list_insert(include, xstrfmt("pack-%s.idx", item->string));
if (geometry) {
struct strbuf buf = STRBUF_INIT;
uint32_t i;
for (i = geometry->split; i < geometry->pack_nr; i++) {
struct packed_git *p = geometry->pack[i];
strbuf_addstr(&buf, pack_basename(p));
strbuf_strip_suffix(&buf, ".pack");
strbuf_addstr(&buf, ".idx");
string_list_insert(include, strbuf_detach(&buf, NULL));
}
for_each_string_list_item(item, existing_nonkept_packs) {
if (!((uintptr_t)item->util & CRUFT_PACK)) {
/*
* no need to check DELETE_PACK, since we're not
* doing an ALL_INTO_ONE repack
*/
continue;
}
string_list_insert(include, xstrfmt("%s.idx", item->string));
}
} else {
for_each_string_list_item(item, existing_nonkept_packs) {
if ((uintptr_t)item->util & DELETE_PACK)
continue;
string_list_insert(include, xstrfmt("%s.idx", item->string));
}
}
}
static int write_midx_included_packs(struct string_list *include,
struct pack_geometry *geometry,
const char *refs_snapshot,
int show_progress, int write_bitmaps)
{
struct child_process cmd = CHILD_PROCESS_INIT;
struct string_list_item *item;
struct packed_git *largest = get_largest_active_pack(geometry);
FILE *in;
int ret;
if (!include->nr)
return 0;
cmd.in = -1;
cmd.git_cmd = 1;
strvec_push(&cmd.args, "multi-pack-index");
strvec_pushl(&cmd.args, "write", "--stdin-packs", NULL);
if (show_progress)
strvec_push(&cmd.args, "--progress");
else
strvec_push(&cmd.args, "--no-progress");
if (write_bitmaps)
strvec_push(&cmd.args, "--bitmap");
if (largest)
strvec_pushf(&cmd.args, "--preferred-pack=%s",
pack_basename(largest));
if (refs_snapshot)
strvec_pushf(&cmd.args, "--refs-snapshot=%s", refs_snapshot);
ret = start_command(&cmd);
if (ret)
return ret;
in = xfdopen(cmd.in, "w");
for_each_string_list_item(item, include)
fprintf(in, "%s\n", item->string);
fclose(in);
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;
struct string_list_item *item;
struct string_list names = STRING_LIST_INIT_DUP;
struct string_list existing_nonkept_packs = STRING_LIST_INIT_DUP;
struct string_list existing_kept_packs = STRING_LIST_INIT_DUP;
struct pack_geometry *geometry = NULL;
struct strbuf line = STRBUF_INIT;
struct tempfile *refs_snapshot = NULL;
int i, ext, ret;
FILE *out;
int show_progress;
/* variables to be filled by option parsing */
int delete_redundant = 0;
const char *unpack_unreachable = NULL;
int keep_unreachable = 0;
struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
struct pack_objects_args po_args = {NULL};
struct pack_objects_args cruft_po_args = {NULL};
int geometric_factor = 0;
int write_midx = 0;
struct option builtin_repack_options[] = {
OPT_BIT('a', NULL, &pack_everything,
N_("pack everything in a single pack"), ALL_INTO_ONE),
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,
N_("pass --no-reuse-delta to git-pack-objects")),
OPT_BOOL('F', NULL, &po_args.no_reuse_object,
N_("pass --no-reuse-object to git-pack-objects")),
OPT_NEGBIT('n', NULL, &run_update_server_info,
N_("do not run git-update-server-info"), 1),
OPT__QUIET(&po_args.quiet, N_("be quiet")),
OPT_BOOL('l', "local", &po_args.local,
N_("pass --local to git-pack-objects")),
OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
N_("write bitmap index")),
OPT_BOOL('i', "delta-islands", &use_delta_islands,
N_("pass --delta-islands to git-pack-objects")),
OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
N_("with -A, do not loosen objects older than this")),
OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
N_("with -a, repack unreachable objects")),
OPT_STRING(0, "window", &po_args.window, N_("n"),
N_("size of the window used for delta compression")),
OPT_STRING(0, "window-memory", &po_args.window_memory, N_("bytes"),
N_("same as the above, but limit memory size instead of entries count")),
OPT_STRING(0, "depth", &po_args.depth, N_("n"),
N_("limits the maximum delta depth")),
OPT_STRING(0, "threads", &po_args.threads, N_("n"),
N_("limits the maximum number of threads")),
OPT_STRING(0, "max-pack-size", &po_args.max_pack_size, N_("bytes"),
N_("maximum size of each packfile")),
OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
N_("repack objects in packs marked with .keep")),
OPT_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"),
N_("do not repack this pack")),
OPT_INTEGER('g', "geometric", &geometric_factor,
N_("find a geometric progression with factor <N>")),
OPT_BOOL('m', "write-midx", &write_midx,
N_("write a multi-pack index of the resulting packs")),
OPT_END()
};
git_config(repack_config, &cruft_po_args);
argc = parse_options(argc, argv, prefix, builtin_repack_options,
git_repack_usage, 0);
if (delete_redundant && repository_format_precious_objects)
die(_("cannot delete packs in a precious-objects repo"));
if (keep_unreachable &&
(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()))
write_bitmaps = 0;
} else if (write_bitmaps &&
git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0) &&
git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0)) {
write_bitmaps = 0;
}
if (pack_kept_objects < 0)
pack_kept_objects = write_bitmaps > 0 && !write_midx;
if (write_bitmaps && !(pack_everything & ALL_INTO_ONE) && !write_midx)
die(_(incremental_bitmap_conflict_error));
if (write_midx && write_bitmaps) {
struct strbuf path = STRBUF_INIT;
strbuf_addf(&path, "%s/%s_XXXXXX", get_object_directory(),
"bitmap-ref-tips");
refs_snapshot = xmks_tempfile(path.buf);
midx_snapshot_refs(refs_snapshot);
strbuf_release(&path);
}
packdir = mkpathdup("%s/pack", get_object_directory());
packtmp_name = xstrfmt(".tmp-%d-pack", (int)getpid());
packtmp = mkpathdup("%s/%s", packdir, packtmp_name);
collect_pack_filenames(&existing_nonkept_packs, &existing_kept_packs,
&keep_pack_list);
if (geometric_factor) {
if (pack_everything)
die(_("options '%s' and '%s' cannot be used together"), "--geometric", "-A/-a");
init_pack_geometry(&geometry, &existing_kept_packs);
split_pack_geometry(geometry, geometric_factor);
}
sigchain_push_common(remove_pack_on_signal);
prepare_pack_objects(&cmd, &po_args);
show_progress = !po_args.quiet && isatty(2);
strvec_push(&cmd.args, "--keep-true-parents");
if (!pack_kept_objects)
strvec_push(&cmd.args, "--honor-pack-keep");
for (i = 0; i < keep_pack_list.nr; i++)
strvec_pushf(&cmd.args, "--keep-pack=%s",
keep_pack_list.items[i].string);
strvec_push(&cmd.args, "--non-empty");
if (!geometry) {
/*
* We need to grab all reachable objects, including those that
* are reachable from reflogs and the index.
*
* When repacking into a geometric progression of packs,
* however, we ask 'git pack-objects --stdin-packs', and it is
* not about packing objects based on reachability but about
* repacking all the objects in specified packs and loose ones
* (indeed, --stdin-packs is incompatible with these options).
*/
strvec_push(&cmd.args, "--all");
strvec_push(&cmd.args, "--reflog");
strvec_push(&cmd.args, "--indexed-objects");
}
if (has_promisor_remote())
strvec_push(&cmd.args, "--exclude-promisor-objects");
if (!write_midx) {
if (write_bitmaps > 0)
strvec_push(&cmd.args, "--write-bitmap-index");
else if (write_bitmaps < 0)
strvec_push(&cmd.args, "--write-bitmap-index-quiet");
}
if (use_delta_islands)
strvec_push(&cmd.args, "--delta-islands");
if (pack_everything & ALL_INTO_ONE) {
repack_promisor_objects(&po_args, &names);
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);
}
if (unpack_unreachable) {
strvec_pushf(&cmd.args,
"--unpack-unreachable=%s",
unpack_unreachable);
} else if (pack_everything & LOOSEN_UNREACHABLE) {
strvec_push(&cmd.args,
"--unpack-unreachable");
} else if (keep_unreachable) {
strvec_push(&cmd.args, "--keep-unreachable");
strvec_push(&cmd.args, "--pack-loose-unreachable");
}
}
} else if (geometry) {
strvec_push(&cmd.args, "--stdin-packs");
strvec_push(&cmd.args, "--unpacked");
} else {
strvec_push(&cmd.args, "--unpacked");
strvec_push(&cmd.args, "--incremental");
}
if (geometry)
cmd.in = -1;
else
cmd.no_stdin = 1;
ret = start_command(&cmd);
if (ret)
return ret;
if (geometry) {
FILE *in = xfdopen(cmd.in, "w");
/*
* The resulting pack should contain all objects in packs that
* are going to be rolled up, but exclude objects in packs which
* are being left alone.
*/
for (i = 0; i < geometry->split; i++)
fprintf(in, "%s\n", pack_basename(geometry->pack[i]));
for (i = geometry->split; i < geometry->pack_nr; i++)
fprintf(in, "^%s\n", pack_basename(geometry->pack[i]));
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);
ret = finish_command(&cmd);
if (ret)
return ret;
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++;
if (!cruft_po_args.window)
cruft_po_args.window = po_args.window;
if (!cruft_po_args.window_memory)
cruft_po_args.window_memory = po_args.window_memory;
if (!cruft_po_args.depth)
cruft_po_args.depth = po_args.depth;
if (!cruft_po_args.threads)
cruft_po_args.threads = po_args.threads;
cruft_po_args.local = po_args.local;
cruft_po_args.quiet = po_args.quiet;
ret = write_cruft_pack(&cruft_po_args, pack_prefix, &names,
&existing_nonkept_packs,
&existing_kept_packs);
if (ret)
return ret;
}
string_list_sort(&names);
for_each_string_list_item(item, &names) {
item->util = (void *)(uintptr_t)populate_pack_exts(item->string);
}
close_object_store(the_repository->objects);
/*
* Ok we have prepared all new packfiles.
*/
for_each_string_list_item(item, &names) {
for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
char *fname, *fname_old;
fname = mkpathdup("%s/pack-%s%s",
packdir, item->string, exts[ext].name);
fname_old = mkpathdup("%s-%s%s",
packtmp, item->string, exts[ext].name);
if (((uintptr_t)item->util) & ((uintptr_t)1 << ext)) {
struct stat statbuffer;
if (!stat(fname_old, &statbuffer)) {
statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
chmod(fname_old, statbuffer.st_mode);
}
if (rename(fname_old, fname))
die_errno(_("renaming '%s' failed"), fname_old);
} else if (!exts[ext].optional)
die(_("missing required file: %s"), fname_old);
else if (unlink(fname) < 0 && errno != ENOENT)
die_errno(_("could not unlink: %s"), fname);
free(fname);
free(fname_old);
}
}
/* End of pack replacement. */
if (delete_redundant && pack_everything & ALL_INTO_ONE) {
const int hexsz = the_hash_algo->hexsz;
for_each_string_list_item(item, &existing_nonkept_packs) {
char *sha1;
size_t len = strlen(item->string);
if (len < hexsz)
continue;
sha1 = item->string + len - hexsz;
/*
* Mark this pack for deletion, which ensures that this
* pack won't be included in a MIDX (if `--write-midx`
* was given) and that we will actually delete this pack
* (if `-d` was given).
*/
if (!string_list_has_string(&names, sha1))
item->util = (void*)(uintptr_t)((size_t)item->util | DELETE_PACK);
}
}
if (write_midx) {
struct string_list include = STRING_LIST_INIT_NODUP;
midx_included_packs(&include, &existing_nonkept_packs,
&existing_kept_packs, &names, geometry);
ret = write_midx_included_packs(&include, geometry,
refs_snapshot ? get_tempfile_path(refs_snapshot) : NULL,
show_progress, write_bitmaps > 0);
string_list_clear(&include, 0);
if (ret)
return ret;
}
reprepare_packed_git(the_repository);
if (delete_redundant) {
int opts = 0;
for_each_string_list_item(item, &existing_nonkept_packs) {
if (!((uintptr_t)item->util & DELETE_PACK))
continue;
remove_redundant_pack(packdir, item->string);
}
if (geometry) {
struct strbuf buf = STRBUF_INIT;
uint32_t i;
for (i = 0; i < geometry->split; i++) {
struct packed_git *p = geometry->pack[i];
if (string_list_has_string(&names,
hash_to_hex(p->hash)))
continue;
strbuf_reset(&buf);
strbuf_addstr(&buf, pack_basename(p));
strbuf_strip_suffix(&buf, ".pack");
remove_redundant_pack(packdir, buf.buf);
}
strbuf_release(&buf);
}
if (show_progress)
opts |= PRUNE_PACKED_VERBOSE;
prune_packed_objects(opts);
if (!keep_unreachable &&
(!(pack_everything & LOOSEN_UNREACHABLE) ||
unpack_unreachable) &&
is_repository_shallow(the_repository))
prune_shallow(PRUNE_QUICK);
}
if (run_update_server_info)
update_server_info(0);
remove_temporary_files();
if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0)) {
unsigned flags = 0;
if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0))
flags |= MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX;
write_midx_file(get_object_directory(), NULL, NULL, flags);
}
string_list_clear(&names, 0);
string_list_clear(&existing_nonkept_packs, 0);
string_list_clear(&existing_kept_packs, 0);
clear_pack_geometry(geometry);
strbuf_release(&line);
return 0;
}