builtin-verify-pack.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "pack.h"
   4 #include "pack-revindex.h"
   5
   6 #define MAX_CHAIN 50
   7
   8 static void show_pack_info(struct packed_git *p)
   9 {
  10         uint32_t nr_objects, i, chain_histogram[MAX_CHAIN+1];
  11
  12         nr_objects = p->num_objects;
  13         memset(chain_histogram, 0, sizeof(chain_histogram));
  14
  15         for (i = 0; i < nr_objects; i++) {
  16                 const unsigned char *sha1;
  17                 unsigned char base_sha1[20];
  18                 const char *type;
  19                 unsigned long size;
  20                 unsigned long store_size;
  21                 off_t offset;
  22                 unsigned int delta_chain_length;
  23
  24                 sha1 = nth_packed_object_sha1(p, i);
  25                 if (!sha1)
  26                         die("internal error pack-check nth-packed-object");
  27                 offset = nth_packed_object_offset(p, i);
  28                 type = packed_object_info_detail(p, offset, &size, &store_size,
  29                                                  &delta_chain_length,
  30                                                  base_sha1);
  31                 printf("%s ", sha1_to_hex(sha1));
  32                 if (!delta_chain_length)
  33                         printf("%-6s %lu %lu %"PRIuMAX"\n",
  34                                type, size, store_size, (uintmax_t)offset);
  35                 else {
  36                         printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
  37                                type, size, store_size, (uintmax_t)offset,
  38                                delta_chain_length, sha1_to_hex(base_sha1));
  39                         if (delta_chain_length <= MAX_CHAIN)
  40                                 chain_histogram[delta_chain_length]++;
  41                         else
  42                                 chain_histogram[0]++;
  43                 }
  44         }
  45
  46         for (i = 0; i <= MAX_CHAIN; i++) {
  47                 if (!chain_histogram[i])
  48                         continue;
  49                 printf("chain length = %"PRIu32": %"PRIu32" object%s\n", i,
  50                        chain_histogram[i], chain_histogram[i] > 1 ? "s" : "");
  51         }
  52         if (chain_histogram[0])
  53                 printf("chain length > %d: %"PRIu32" object%s\n", MAX_CHAIN,
  54                        chain_histogram[0], chain_histogram[0] > 1 ? "s" : "");
  55 }
  56
  57 static int verify_one_pack(const char *path, int verbose)
  58 {
  59         char arg[PATH_MAX];
  60         int len;
  61         struct packed_git *pack;
  62         int err;
  63
  64         len = strlcpy(arg, path, PATH_MAX);
  65         if (len >= PATH_MAX)
  66                 return error("name too long: %s", path);
  67
  68         /*
  69          * In addition to "foo.idx" we accept "foo.pack" and "foo";
  70          * normalize these forms to "foo.idx" for add_packed_git().
  71          */
  72         if (has_extension(arg, ".pack")) {
  73                 strcpy(arg + len - 5, ".idx");
  74                 len--;
  75         } else if (!has_extension(arg, ".idx")) {
  76                 if (len + 4 >= PATH_MAX)
  77                         return error("name too long: %s.idx", arg);
  78                 strcpy(arg + len, ".idx");
  79                 len += 4;
  80         }
  81
  82         /*
  83          * add_packed_git() uses our buffer (containing "foo.idx") to
  84          * build the pack filename ("foo.pack").  Make sure it fits.
  85          */
  86         if (len + 1 >= PATH_MAX) {
  87                 arg[len - 4] = '\0';
  88                 return error("name too long: %s.pack", arg);
  89         }
  90
  91         pack = add_packed_git(arg, len, 1);
  92         if (!pack)
  93                 return error("packfile %s not found.", arg);
  94
  95         install_packed_git(pack);
  96         err = verify_pack(pack);
  97
  98         if (verbose) {
  99                 if (err)
 100                         printf("%s: bad\n", pack->pack_name);
 101                 else {
 102                         show_pack_info(pack);
 103                         printf("%s: ok\n", pack->pack_name);
 104                 }
 105         }
 106
 107         return err;
 108 }
 109
 110 static const char verify_pack_usage[] = "git verify-pack [-v] <pack>...";
 111
 112 int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 113 {
 114         int err = 0;
 115         int verbose = 0;
 116         int no_more_options = 0;
 117         int nothing_done = 1;
 118
 119         git_config(git_default_config, NULL);
 120         while (1 < argc) {
 121                 if (!no_more_options && argv[1][0] == '-') {
 122                         if (!strcmp("-v", argv[1]))
 123                                 verbose = 1;
 124                         else if (!strcmp("--", argv[1]))
 125                                 no_more_options = 1;
 126                         else
 127                                 usage(verify_pack_usage);
 128                 }
 129                 else {
 130                         if (verify_one_pack(argv[1], verbose))
 131                                 err = 1;
 132                         discard_revindex();
 133                         nothing_done = 0;
 134                 }
 135                 argc--; argv++;
 136         }
 137
 138         if (nothing_done)
 139                 usage(verify_pack_usage);
 140
 141         return err;
 142 }