git-am: do not allow empty commits by mistake.
[git] / prune-packed.c
1 #include "cache.h"
2
3 static const char prune_packed_usage[] =
4 "git-prune-packed [-n]";
5
6 static int dryrun;
7
8 static void prune_dir(int i, DIR *dir, char *pathname, int len)
9 {
10         struct dirent *de;
11         char hex[40];
12
13         sprintf(hex, "%02x", i);
14         while ((de = readdir(dir)) != NULL) {
15                 unsigned char sha1[20];
16                 if (strlen(de->d_name) != 38)
17                         continue;
18                 memcpy(hex+2, de->d_name, 38);
19                 if (get_sha1_hex(hex, sha1))
20                         continue;
21                 if (!has_sha1_pack(sha1))
22                         continue;
23                 memcpy(pathname + len, de->d_name, 38);
24                 if (dryrun)
25                         printf("rm -f %s\n", pathname);
26                 else if (unlink(pathname) < 0)
27                         error("unable to unlink %s", pathname);
28         }
29         pathname[len] = 0;
30         rmdir(pathname);
31 }
32
33 static void prune_packed_objects(void)
34 {
35         int i;
36         static char pathname[PATH_MAX];
37         const char *dir = get_object_directory();
38         int len = strlen(dir);
39
40         if (len > PATH_MAX - 42)
41                 die("impossible object directory");
42         memcpy(pathname, dir, len);
43         if (len && pathname[len-1] != '/')
44                 pathname[len++] = '/';
45         for (i = 0; i < 256; i++) {
46                 DIR *d;
47
48                 sprintf(pathname + len, "%02x/", i);
49                 d = opendir(pathname);
50                 if (!d)
51                         continue;
52                 prune_dir(i, d, pathname, len + 3);
53                 closedir(d);
54         }
55 }
56
57 int main(int argc, char **argv)
58 {
59         int i;
60
61         setup_git_directory();
62
63         for (i = 1; i < argc; i++) {
64                 const char *arg = argv[i];
65
66                 if (*arg == '-') {
67                         if (!strcmp(arg, "-n"))
68                                 dryrun = 1;
69                         else
70                                 usage(prune_packed_usage);
71                         continue;
72                 }
73                 /* Handle arguments here .. */
74                 usage(prune_packed_usage);
75         }
76         sync();
77         prune_packed_objects();
78         return 0;
79 }