git/t/helper/test-find-pack.c
Jeff King 479ab76c9f packfile: use object_id in find_pack_entry_one()
The main function we use to search a pack index for an object is
find_pack_entry_one(). That function still takes a bare pointer to the
hash, despite the fact that its underlying bsearch_pack() function needs
an object_id struct. And so we end up making an extra copy of the hash
into the struct just to do a lookup.

As it turns out, all callers but one already have such an object_id. So
we can just take a pointer to that struct and use it directly. This
avoids the extra copy and provides a more type-safe interface.

The one exception is get_delta_base() in packfile.c, when we are chasing
a REF_DELTA from inside the pack (and thus we have a pointer directly to
the mmap'd pack memory, not a struct). We can just bump the hashcpy()
from inside find_pack_entry_one() to this one caller that needs it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
2024-10-25 17:35:46 -04:00

53 lines
1.3 KiB
C

#define USE_THE_REPOSITORY_VARIABLE
#include "test-tool.h"
#include "object-name.h"
#include "object-store.h"
#include "packfile.h"
#include "parse-options.h"
#include "setup.h"
/*
* Display the path(s), one per line, of the packfile(s) containing
* the given object.
*
* If '--check-count <n>' is passed, then error out if the number of
* packfiles containing the object is not <n>.
*/
static const char *find_pack_usage[] = {
"test-tool find-pack [--check-count <n>] <object>",
NULL
};
int cmd__find_pack(int argc, const char **argv)
{
struct object_id oid;
struct packed_git *p;
int count = -1, actual_count = 0;
const char *prefix = setup_git_directory();
struct option options[] = {
OPT_INTEGER('c', "check-count", &count, "expected number of packs"),
OPT_END(),
};
argc = parse_options(argc, argv, prefix, options, find_pack_usage, 0);
if (argc != 1)
usage(find_pack_usage[0]);
if (repo_get_oid(the_repository, argv[0], &oid))
die("cannot parse %s as an object name", argv[0]);
for (p = get_all_packs(the_repository); p; p = p->next)
if (find_pack_entry_one(&oid, p)) {
printf("%s\n", p->pack_name);
actual_count++;
}
if (count > -1 && count != actual_count)
die("bad packfile count %d instead of %d", actual_count, count);
return 0;
}