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