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] [--grace=time]";
   9 static int show_only;
  10 static int prune_grace_period;
  11
  12 static int prune_object(char *path, const char *filename, const unsigned char *sha1)
  13 {
  14         char buf[20];
  15         const char *type;
  16
  17         if (show_only) {
  18                 if (sha1_object_info(sha1, buf, NULL))
  19                         type = "unknown";
  20                 else
  21                         type = buf;
  22                 printf("%s %s\n", sha1_to_hex(sha1), type);
  23                 return 0;
  24         }
  25         unlink(mkpath("%s/%s", path, filename));
  26         rmdir(path);
  27         return 0;
  28 }
  29
  30 static int prune_dir(int i, char *path)
  31 {
  32         DIR *dir = opendir(path);
  33         struct dirent *de;
  34
  35         if (!dir)
  36                 return 0;
  37
  38         while ((de = readdir(dir)) != NULL) {
  39                 char name[100];
  40                 unsigned char sha1[20];
  41                 int len = strlen(de->d_name);
  42                 struct stat st;
  43
  44                 switch (len) {
  45                 case 2:
  46                         if (de->d_name[1] != '.')
  47                                 break;
  48                 case 1:
  49                         if (de->d_name[0] != '.')
  50                                 break;
  51                         continue;
  52                 case 38:
  53                         sprintf(name, "%02x", i);
  54                         memcpy(name+2, de->d_name, len+1);
  55                         if (get_sha1_hex(name, sha1) < 0)
  56                                 break;
  57
  58                         /*
  59                          * Do we know about this object?
  60                          * It must have been reachable
  61                          */
  62                         if (lookup_object(sha1))
  63                                 continue;
  64
  65                         if (prune_grace_period > 0 &&
  66                             !stat(mkpath("%s/%s", path, de->d_name), &st) &&
  67                             st.st_mtime > prune_grace_period)
  68                                 continue;
  69
  70                         prune_object(path, de->d_name, sha1);
  71                         continue;
  72                 }
  73                 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
  74         }
  75         closedir(dir);
  76         return 0;
  77 }
  78
  79 static void prune_object_dir(const char *path)
  80 {
  81         int i;
  82         for (i = 0; i < 256; i++) {
  83                 static char dir[4096];
  84                 sprintf(dir, "%s/%02x", path, i);
  85                 prune_dir(i, dir);
  86         }
  87 }
  88
  89 static int git_prune_config(const char *var, const char *value)
  90 {
  91         if (!strcmp(var, "gc.prunegrace")) {
  92                 if (!strcmp(value, "off"))
  93                         prune_grace_period = 0;
  94                 else
  95                         prune_grace_period = approxidate(value);
  96                 return 0;
  97         }
  98         return git_default_config(var, value);
  99 }
 100
 101 int cmd_prune(int argc, const char **argv, const char *prefix)
 102 {
 103         int i;
 104         struct rev_info revs;
 105         prune_grace_period = time(NULL)-24*60*60;
 106
 107         git_config(git_prune_config);
 108
 109         for (i = 1; i < argc; i++) {
 110                 const char *arg = argv[i];
 111                 if (!strcmp(arg, "-n")) {
 112                         show_only = 1;
 113                         continue;
 114                 }
 115                 if (!strncmp(arg, "--grace=", 8)) {
 116                         if (!strcmp(arg+8, "off"))
 117                                 prune_grace_period = 0;
 118                         else
 119                                 prune_grace_period = approxidate(arg+8);
 120                         continue;
 121                 }
 122                 usage(prune_usage);
 123         }
 124
 125         save_commit_buffer = 0;
 126         init_revisions(&revs, prefix);
 127         mark_reachable_objects(&revs, 1);
 128
 129         prune_object_dir(get_object_directory());
 130
 131         sync();
 132         prune_packed_objects(show_only);
 133         return 0;
 134 }