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