git/builtin-prune-packed.c
Junio C Hamano 106d710bc1 pack-objects --unpacked=<existing pack> option.
Incremental repack without -a essentially boils down to:

	rev-list --objects --unpacked --all |
        pack-objects $new_pack

which picks up all loose objects that are still live and creates
a new pack.

This implements --unpacked=<existing pack> option to tell the
revision walking machinery to pretend as if objects in such a
pack are unpacked for the purpose of object listing.  With this,
we could say:

	rev-list --objects --unpacked=$active_pack --all |
	pack-objects $new_pack

instead, to mean "all live loose objects but pretend as if
objects that are in this pack are also unpacked".  The newly
created pack would be perfect for updating $active_pack by
replacing it.

Since pack-objects now knows how to do the rev-list's work
itself internally, you can also write the above example by:

	pack-objects --unpacked=$active_pack --all $new_pack </dev/null

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-07 02:46:03 -07:00

79 lines
1.5 KiB
C

#include "builtin.h"
#include "cache.h"
static const char prune_packed_usage[] =
"git-prune-packed [-n]";
static int dryrun;
static void prune_dir(int i, DIR *dir, char *pathname, int len)
{
struct dirent *de;
char hex[40];
sprintf(hex, "%02x", i);
while ((de = readdir(dir)) != NULL) {
unsigned char sha1[20];
if (strlen(de->d_name) != 38)
continue;
memcpy(hex+2, de->d_name, 38);
if (get_sha1_hex(hex, sha1))
continue;
if (!has_sha1_pack(sha1, NULL))
continue;
memcpy(pathname + len, de->d_name, 38);
if (dryrun)
printf("rm -f %s\n", pathname);
else if (unlink(pathname) < 0)
error("unable to unlink %s", pathname);
}
pathname[len] = 0;
rmdir(pathname);
}
static void prune_packed_objects(void)
{
int i;
static char pathname[PATH_MAX];
const char *dir = get_object_directory();
int len = strlen(dir);
if (len > PATH_MAX - 42)
die("impossible object directory");
memcpy(pathname, dir, len);
if (len && pathname[len-1] != '/')
pathname[len++] = '/';
for (i = 0; i < 256; i++) {
DIR *d;
sprintf(pathname + len, "%02x/", i);
d = opendir(pathname);
if (!d)
continue;
prune_dir(i, d, pathname, len + 3);
closedir(d);
}
}
int cmd_prune_packed(int argc, const char **argv, const char *prefix)
{
int i;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (*arg == '-') {
if (!strcmp(arg, "-n"))
dryrun = 1;
else
usage(prune_packed_usage);
continue;
}
/* Handle arguments here .. */
usage(prune_packed_usage);
}
sync();
prune_packed_objects();
return 0;
}