unpack-file.c

   1 #include "cache.h"
   2 #include "blob.h"
   3 #include "exec_cmd.h"
   4
   5 static char *create_temp_file(unsigned char *sha1)
   6 {
   7         static char path[50];
   8         void *buf;
   9         enum object_type type;
  10         unsigned long size;
  11         int fd;
  12
  13         buf = read_sha1_file(sha1, &type, &size);
  14         if (!buf || type != OBJ_BLOB)
  15                 die("unable to read blob object %s", sha1_to_hex(sha1));
  16
  17         strcpy(path, ".merge_file_XXXXXX");
  18         fd = xmkstemp(path);
  19         if (write_in_full(fd, buf, size) != size)
  20                 die_errno("unable to write temp-file");
  21         close(fd);
  22         return path;
  23 }
  24
  25 int main(int argc, char **argv)
  26 {
  27         unsigned char sha1[20];
  28
  29         git_extract_argv0_path(argv[0]);
  30
  31         if (argc != 2 || !strcmp(argv[1], "-h"))
  32                 usage("git unpack-file <sha1>");
  33         if (get_sha1(argv[1], sha1))
  34                 die("Not a valid object name %s", argv[1]);
  35
  36         setup_git_directory();
  37         git_config(git_default_config, NULL);
  38
  39         puts(create_temp_file(sha1));
  40         return 0;
  41 }