Andrew's git - gitweb.git/blob - builtin-pack-refs.c

   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,
  13                          int flags, void *cb_data)
  14{
  15        FILE *refs_file = cb_data;
  16
  17        fprintf(refs_file, "%s %s\n", sha1_to_hex(sha1), path);
  18        return 0;
  19}
  20
  21int cmd_pack_refs(int argc, const char **argv, const char *prefix)
  22{
  23        int fd;
  24        FILE *refs_file;
  25
  26        result_path = xstrdup(git_path("packed-refs"));
  27        lock_path = xstrdup(mkpath("%s.lock", result_path));
  28
  29        fd = open(lock_path, O_CREAT | O_EXCL | O_WRONLY, 0666);
  30        if (fd < 0)
  31                die("unable to create new ref-pack file (%s)", strerror(errno));
  32        atexit(remove_lock_file);
  33
  34        refs_file = fdopen(fd, "w");
  35        if (!refs_file)
  36                die("unable to create ref-pack file structure (%s)", strerror(errno));
  37        for_each_ref(handle_one_ref, refs_file);
  38        fsync(fd);
  39        fclose(refs_file);
  40        if (rename(lock_path, result_path) < 0)
  41                die("unable to overwrite old ref-pack file (%s)", strerror(errno));
  42        lock_path = NULL;
  43        return 0;
  44}