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