Andrew's git - gitweb.git/blob - 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
   8static 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
  68static 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
 121static const char verify_pack_usage[] = "git verify-pack [-v] <pack>...";
 122
 123int 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}