builtin-prune-packed.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3
   4 static const char prune_packed_usage[] =
   5 "git-prune-packed [-n] [-q]";
   6
   7 #define DRY_RUN 01
   8 #define VERBOSE 02
   9
  10 static void prune_dir(int i, DIR *dir, char *pathname, int len, int opts)
  11 {
  12         struct dirent *de;
  13         char hex[40];
  14
  15         sprintf(hex, "%02x", i);
  16         while ((de = readdir(dir)) != NULL) {
  17                 unsigned char sha1[20];
  18                 if (strlen(de->d_name) != 38)
  19                         continue;
  20                 memcpy(hex+2, de->d_name, 38);
  21                 if (get_sha1_hex(hex, sha1))
  22                         continue;
  23                 if (!has_sha1_pack(sha1, NULL))
  24                         continue;
  25                 memcpy(pathname + len, de->d_name, 38);
  26                 if (opts & DRY_RUN)
  27                         printf("rm -f %s\n", pathname);
  28                 else if (unlink(pathname) < 0)
  29                         error("unable to unlink %s", pathname);
  30         }
  31         pathname[len] = 0;
  32         rmdir(pathname);
  33 }
  34
  35 void prune_packed_objects(int opts)
  36 {
  37         int i;
  38         static char pathname[PATH_MAX];
  39         const char *dir = get_object_directory();
  40         int len = strlen(dir);
  41
  42         if (len > PATH_MAX - 42)
  43                 die("impossible object directory");
  44         memcpy(pathname, dir, len);
  45         if (len && pathname[len-1] != '/')
  46                 pathname[len++] = '/';
  47         for (i = 0; i < 256; i++) {
  48                 DIR *d;
  49
  50                 sprintf(pathname + len, "%02x/", i);
  51                 d = opendir(pathname);
  52                 if (opts == VERBOSE && (d || i == 255))
  53                         fprintf(stderr, "Removing unused objects %d%%...\015",
  54                                 ((i+1) * 100) / 256);
  55                 if (!d)
  56                         continue;
  57                 prune_dir(i, d, pathname, len + 3, opts);
  58                 closedir(d);
  59         }
  60         if (opts == VERBOSE)
  61                 fprintf(stderr, "\nDone.\n");
  62 }
  63
  64 int cmd_prune_packed(int argc, const char **argv, const char *prefix)
  65 {
  66         int i;
  67         int opts = VERBOSE;
  68
  69         for (i = 1; i < argc; i++) {
  70                 const char *arg = argv[i];
  71
  72                 if (*arg == '-') {
  73                         if (!strcmp(arg, "-n"))
  74                                 opts |= DRY_RUN;
  75                         else if (!strcmp(arg, "-q"))
  76                                 opts &= ~VERBOSE;
  77                         else
  78                                 usage(prune_packed_usage);
  79                         continue;
  80                 }
  81                 /* Handle arguments here .. */
  82                 usage(prune_packed_usage);
  83         }
  84         sync();
  85         prune_packed_objects(opts);
  86         return 0;
  87 }