builtin-prune.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "diff.h"
   4 #include "revision.h"
   5 #include "builtin.h"
   6 #include "reachable.h"
   7
   8 static const char prune_usage[] = "git-prune [-n]";
   9 static int show_only;
  10
  11 static int prune_object(char *path, const char *filename, const unsigned char *sha1)
  12 {
  13         char buf[20];
  14         const char *type;
  15
  16         if (show_only) {
  17                 if (sha1_object_info(sha1, buf, NULL))
  18                         type = "unknown";
  19                 else
  20                         type = buf;
  21                 printf("%s %s\n", sha1_to_hex(sha1), type);
  22                 return 0;
  23         }
  24         unlink(mkpath("%s/%s", path, filename));
  25         rmdir(path);
  26         return 0;
  27 }
  28
  29 static int prune_dir(int i, char *path)
  30 {
  31         DIR *dir = opendir(path);
  32         struct dirent *de;
  33
  34         if (!dir)
  35                 return 0;
  36
  37         while ((de = readdir(dir)) != NULL) {
  38                 char name[100];
  39                 unsigned char sha1[20];
  40                 int len = strlen(de->d_name);
  41
  42                 switch (len) {
  43                 case 2:
  44                         if (de->d_name[1] != '.')
  45                                 break;
  46                 case 1:
  47                         if (de->d_name[0] != '.')
  48                                 break;
  49                         continue;
  50                 case 38:
  51                         sprintf(name, "%02x", i);
  52                         memcpy(name+2, de->d_name, len+1);
  53                         if (get_sha1_hex(name, sha1) < 0)
  54                                 break;
  55
  56                         /*
  57                          * Do we know about this object?
  58                          * It must have been reachable
  59                          */
  60                         if (lookup_object(sha1))
  61                                 continue;
  62
  63                         prune_object(path, de->d_name, sha1);
  64                         continue;
  65                 }
  66                 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
  67         }
  68         closedir(dir);
  69         return 0;
  70 }
  71
  72 static void prune_object_dir(const char *path)
  73 {
  74         int i;
  75         for (i = 0; i < 256; i++) {
  76                 static char dir[4096];
  77                 sprintf(dir, "%s/%02x", path, i);
  78                 prune_dir(i, dir);
  79         }
  80 }
  81
  82 int cmd_prune(int argc, const char **argv, const char *prefix)
  83 {
  84         int i;
  85         struct rev_info revs;
  86
  87         for (i = 1; i < argc; i++) {
  88                 const char *arg = argv[i];
  89                 if (!strcmp(arg, "-n")) {
  90                         show_only = 1;
  91                         continue;
  92                 }
  93                 usage(prune_usage);
  94         }
  95
  96         save_commit_buffer = 0;
  97         init_revisions(&revs, prefix);
  98         mark_reachable_objects(&revs, 1);
  99
 100         prune_object_dir(get_object_directory());
 101
 102         sync();
 103         prune_packed_objects(show_only);
 104         return 0;
 105 }