builtin/verify-pack.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "pack.h"
   4 #include "pack-revindex.h"
   5 #include "parse-options.h"
   6
   7 #define MAX_CHAIN 50
   8
   9 #define VERIFY_PACK_VERBOSE 01
  10 #define VERIFY_PACK_STAT_ONLY 02
  11
  12 static void show_pack_info(struct packed_git *p, unsigned int flags)
  13 {
  14         uint32_t nr_objects, i;
  15         int cnt;
  16         int stat_only = flags & VERIFY_PACK_STAT_ONLY;
  17         unsigned long chain_histogram[MAX_CHAIN+1], baseobjects;
  18
  19         nr_objects = p->num_objects;
  20         memset(chain_histogram, 0, sizeof(chain_histogram));
  21         baseobjects = 0;
  22
  23         for (i = 0; i < nr_objects; i++) {
  24                 const unsigned char *sha1;
  25                 unsigned char base_sha1[20];
  26                 const char *type;
  27                 unsigned long size;
  28                 unsigned long store_size;
  29                 off_t offset;
  30                 unsigned int delta_chain_length;
  31
  32                 sha1 = nth_packed_object_sha1(p, i);
  33                 if (!sha1)
  34                         die("internal error pack-check nth-packed-object");
  35                 offset = nth_packed_object_offset(p, i);
  36                 type = packed_object_info_detail(p, offset, &size, &store_size,
  37                                                  &delta_chain_length,
  38                                                  base_sha1);
  39                 if (!stat_only)
  40                         printf("%s ", sha1_to_hex(sha1));
  41                 if (!delta_chain_length) {
  42                         if (!stat_only)
  43                                 printf("%-6s %lu %lu %"PRIuMAX"\n",
  44                                        type, size, store_size, (uintmax_t)offset);
  45                         baseobjects++;
  46                 }
  47                 else {
  48                         if (!stat_only)
  49                                 printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
  50                                        type, size, store_size, (uintmax_t)offset,
  51                                        delta_chain_length, sha1_to_hex(base_sha1));
  52                         if (delta_chain_length <= MAX_CHAIN)
  53                                 chain_histogram[delta_chain_length]++;
  54                         else
  55                                 chain_histogram[0]++;
  56                 }
  57         }
  58
  59         if (baseobjects)
  60                 printf("non delta: %lu object%s\n",
  61                        baseobjects, baseobjects > 1 ? "s" : "");
  62
  63         for (cnt = 1; cnt <= MAX_CHAIN; cnt++) {
  64                 if (!chain_histogram[cnt])
  65                         continue;
  66                 printf("chain length = %d: %lu object%s\n", cnt,
  67                        chain_histogram[cnt],
  68                        chain_histogram[cnt] > 1 ? "s" : "");
  69         }
  70         if (chain_histogram[0])
  71                 printf("chain length > %d: %lu object%s\n", MAX_CHAIN,
  72                        chain_histogram[0],
  73                        chain_histogram[0] > 1 ? "s" : "");
  74 }
  75
  76 static int verify_one_pack(const char *path, unsigned int flags)
  77 {
  78         char arg[PATH_MAX];
  79         int len;
  80         int verbose = flags & VERIFY_PACK_VERBOSE;
  81         int stat_only = flags & VERIFY_PACK_STAT_ONLY;
  82         struct packed_git *pack;
  83         int err;
  84
  85         len = strlcpy(arg, path, PATH_MAX);
  86         if (len >= PATH_MAX)
  87                 return error("name too long: %s", path);
  88
  89         /*
  90          * In addition to "foo.idx" we accept "foo.pack" and "foo";
  91          * normalize these forms to "foo.idx" for add_packed_git().
  92          */
  93         if (has_extension(arg, ".pack")) {
  94                 strcpy(arg + len - 5, ".idx");
  95                 len--;
  96         } else if (!has_extension(arg, ".idx")) {
  97                 if (len + 4 >= PATH_MAX)
  98                         return error("name too long: %s.idx", arg);
  99                 strcpy(arg + len, ".idx");
 100                 len += 4;
 101         }
 102
 103         /*
 104          * add_packed_git() uses our buffer (containing "foo.idx") to
 105          * build the pack filename ("foo.pack").  Make sure it fits.
 106          */
 107         if (len + 1 >= PATH_MAX) {
 108                 arg[len - 4] = '\0';
 109                 return error("name too long: %s.pack", arg);
 110         }
 111
 112         pack = add_packed_git(arg, len, 1);
 113         if (!pack)
 114                 return error("packfile %s not found.", arg);
 115
 116         install_packed_git(pack);
 117
 118         if (!stat_only)
 119                 err = verify_pack(pack);
 120         else
 121                 err = open_pack_index(pack);
 122
 123         if (verbose || stat_only) {
 124                 if (err)
 125                         printf("%s: bad\n", pack->pack_name);
 126                 else {
 127                         show_pack_info(pack, flags);
 128                         if (!stat_only)
 129                                 printf("%s: ok\n", pack->pack_name);
 130                 }
 131         }
 132
 133         return err;
 134 }
 135
 136 static const char * const verify_pack_usage[] = {
 137         "git verify-pack [-v|--verbose] [-s|--stat-only] <pack>...",
 138         NULL
 139 };
 140
 141 int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 142 {
 143         int err = 0;
 144         unsigned int flags = 0;
 145         int i;
 146         const struct option verify_pack_options[] = {
 147                 OPT_BIT('v', "verbose", &flags, "verbose",
 148                         VERIFY_PACK_VERBOSE),
 149                 OPT_BIT('s', "stat-only", &flags, "show statistics only",
 150                         VERIFY_PACK_STAT_ONLY),
 151                 OPT_END()
 152         };
 153
 154         git_config(git_default_config, NULL);
 155         argc = parse_options(argc, argv, prefix, verify_pack_options,
 156                              verify_pack_usage, 0);
 157         if (argc < 1)
 158                 usage_with_options(verify_pack_usage, verify_pack_options);
 159         for (i = 0; i < argc; i++) {
 160                 if (verify_one_pack(argv[i], flags))
 161                         err = 1;
 162                 discard_revindex();
 163         }
 164
 165         return err;
 166 }