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