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#include "parse-options.h"
   6
   7#define MAX_CHAIN 50
   8
   9static 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
  58static 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
 111static const char * const verify_pack_usage[] = {
 112        "git verify-pack [-v|--verbose] <pack>...",
 113        NULL
 114};
 115
 116int 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}