object name: introduce ':/<oneline prefix>' notation
[git] / unpack-file.c
1 #include "cache.h"
2 #include "blob.h"
3
4 static char *create_temp_file(unsigned char *sha1)
5 {
6         static char path[50];
7         void *buf;
8         char type[100];
9         unsigned long size;
10         int fd;
11
12         buf = read_sha1_file(sha1, type, &size);
13         if (!buf || strcmp(type, blob_type))
14                 die("unable to read blob object %s", sha1_to_hex(sha1));
15
16         strcpy(path, ".merge_file_XXXXXX");
17         fd = mkstemp(path);
18         if (fd < 0)
19                 die("unable to create temp-file");
20         if (write_in_full(fd, buf, size) != size)
21                 die("unable to write temp-file");
22         close(fd);
23         return path;
24 }
25
26 int main(int argc, char **argv)
27 {
28         unsigned char sha1[20];
29
30         if (argc != 2)
31                 usage("git-unpack-file <sha1>");
32         if (get_sha1(argv[1], sha1))
33                 die("Not a valid object name %s", argv[1]);
34
35         setup_git_directory();
36         git_config(git_default_config);
37
38         puts(create_temp_file(sha1));
39         return 0;
40 }