Andrew's git - gitweb.git/blob

b3d5470cc09ad35f7baa79bc618c8dda3be2f324
   1#include "cache.h"
   2#include "refs.h"
   3
   4static const char *result_path, *lock_path;
   5
   6static void remove_lock_file(void)
   7{
   8        if (lock_path)
   9                unlink(lock_path);
  10}
  11
  12static int handle_one_ref(const char *path, const unsigned char *sha1, void *cb_data)
  13{
  14        FILE *refs_file = cb_data;
  15
  16        fprintf(refs_file, "%s %s\n", sha1_to_hex(sha1), path);
  17        return 0;
  18}
  19
  20int cmd_pack_refs(int argc, const char **argv, const char *prefix)
  21{
  22        int fd;
  23        FILE *refs_file;
  24
  25        result_path = xstrdup(git_path("packed-refs"));
  26        lock_path = xstrdup(mkpath("%s.lock", result_path));
  27
  28        fd = open(lock_path, O_CREAT | O_EXCL | O_WRONLY, 0666);
  29        if (fd < 0)
  30                die("unable to create new ref-pack file (%s)", strerror(errno));
  31        atexit(remove_lock_file);
  32
  33        refs_file = fdopen(fd, "w");
  34        if (!refs_file)
  35                die("unable to create ref-pack file structure (%s)", strerror(errno));
  36        for_each_ref(handle_one_ref, refs_file);
  37        fsync(fd);
  38        fclose(refs_file);
  39        if (rename(lock_path, result_path) < 0)
  40                die("unable to overwrite old ref-pack file (%s)", strerror(errno));
  41        lock_path = NULL;
  42        return 0;
  43}