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;
  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
  69static 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
 122static const char * const verify_pack_usage[] = {
 123        "git verify-pack [-v|--verbose] <pack>...",
 124        NULL
 125};
 126
 127int 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}