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#include "cache.h"
#include "refs.h"
static const char *result_path, *lock_path;
static void remove_lock_file(void)
{
if (lock_path)
unlink(lock_path);
}
static int handle_one_ref(const char *path, const unsigned char *sha1, void *cb_data)
{
FILE *refs_file = cb_data;
fprintf(refs_file, "%s %s\n", sha1_to_hex(sha1), path);
return 0;
}
int cmd_pack_refs(int argc, const char **argv, const char *prefix)
{
int fd;
FILE *refs_file;
result_path = xstrdup(git_path("packed-refs"));
lock_path = xstrdup(mkpath("%s.lock", result_path));
fd = open(lock_path, O_CREAT | O_EXCL | O_WRONLY, 0666);
if (fd < 0)
die("unable to create new ref-pack file (%s)", strerror(errno));
atexit(remove_lock_file);
refs_file = fdopen(fd, "w");
if (!refs_file)
die("unable to create ref-pack file structure (%s)", strerror(errno));
for_each_ref(handle_one_ref, refs_file);
fsync(fd);
fclose(refs_file);
if (rename(lock_path, result_path) < 0)
die("unable to overwrite old ref-pack file (%s)", strerror(errno));
lock_path = NULL;
return 0;
}
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