/*

 * Builtin "git count-objects".

 *

 * Copyright (c) 2006 Junio C Hamano

 */

#include "builtin.h"

#include "config.h"

#include "dir.h"

#include "environment.h"

#include "gettext.h"

#include "path.h"

#include "repository.h"

#include "parse-options.h"

#include "quote.h"

#include "packfile.h"

#include "object-store-ll.h"

static unsigned long garbage;

static off_t size_garbage;

static int verbose;

static unsigned long loose, packed, packed_loose;

static off_t loose_size;

static const char *bits_to_msg(unsigned seen_bits)

{

  switch (seen_bits) {

  case 0:

    return "no corresponding .idx or .pack";

  case PACKDIR_FILE_GARBAGE:

    return "garbage found";

  case PACKDIR_FILE_PACK:

    return "no corresponding .idx";

  case PACKDIR_FILE_IDX:

    return "no corresponding .pack";

  case PACKDIR_FILE_PACK|PACKDIR_FILE_IDX:

  default:

    return NULL;

  }

}

static void real_report_garbage(unsigned seen_bits, const char *path)

{

  struct stat st;

  const char *desc = bits_to_msg(seen_bits);

  if (!desc)

    return;

  if (!stat(path, &st))

    size_garbage += st.st_size;

  warning("%s: %s", desc, path);

  garbage++;

}

static void loose_garbage(const char *path)

{

  if (verbose)

    report_garbage(PACKDIR_FILE_GARBAGE, path);

}

static int count_loose(const struct object_id *oid, const char *path,

           void *data UNUSED)

{

  struct stat st;

  if (lstat(path, &st) || !S_ISREG(st.st_mode))

    loose_garbage(path);

  else {

    loose_size += on_disk_bytes(st);

    loose++;

    if (verbose && has_object_pack(oid))

      packed_loose++;

  }

  return 0;

}

static int count_cruft(const char *basename UNUSED, const char *path,

           void *data UNUSED)

{

  loose_garbage(path);

  return 0;

}

static int print_alternate(struct object_directory *odb, void *data UNUSED)

{

  printf("alternate: ");

  quote_c_style(odb->path, NULL, stdout, 0);

  putchar('\n');

  return 0;

}

static char const * const count_objects_usage[] = {

  "git count-objects [-v] [-H | --human-readable]",

  NULL

};

int cmd_count_objects(int argc, const char **argv, const char *prefix)

{

  int human_readable = 0;

  struct option opts[] = {

    OPT__VERBOSE(&verbose, N_("be verbose")),

    OPT_BOOL('H', "human-readable", &human_readable,

       N_("print sizes in human readable format")),

    OPT_END(),

  };

  git_config(git_default_config, NULL);

  argc = parse_options(argc, argv, prefix, opts, count_objects_usage, 0);

  /* we do not take arguments other than flags for now */

  if (argc)

    usage_with_options(count_objects_usage, opts);

  if (verbose) {

    report_garbage = real_report_garbage;

    report_linked_checkout_garbage(the_repository);

  }

  for_each_loose_file_in_objdir(get_object_directory(),

              count_loose, count_cruft, NULL, NULL);

  if (verbose) {

    struct packed_git *p;

    unsigned long num_pack = 0;

    off_t size_pack = 0;

    struct strbuf loose_buf = STRBUF_INIT;

    struct strbuf pack_buf = STRBUF_INIT;

    struct strbuf garbage_buf = STRBUF_INIT;

    for (p = get_all_packs(the_repository); p; p = p->next) {

      if (!p->pack_local)

        continue;

      if (open_pack_index(p))

        continue;

      packed += p->num_objects;

      size_pack += p->pack_size + p->index_size;

      num_pack++;

    }

    if (human_readable) {

      strbuf_humanise_bytes(&loose_buf, loose_size);

      strbuf_humanise_bytes(&pack_buf, size_pack);

      strbuf_humanise_bytes(&garbage_buf, size_garbage);

    } else {

      strbuf_addf(&loose_buf, "%lu",

            (unsigned long)(loose_size / 1024));

      strbuf_addf(&pack_buf, "%lu",

            (unsigned long)(size_pack / 1024));

      strbuf_addf(&garbage_buf, "%lu",

            (unsigned long)(size_garbage / 1024));

    }

    printf("count: %lu\n", loose);

    printf("size: %s\n", loose_buf.buf);

    printf("in-pack: %lu\n", packed);

    printf("packs: %lu\n", num_pack);

    printf("size-pack: %s\n", pack_buf.buf);

    printf("prune-packable: %lu\n", packed_loose);

    printf("garbage: %lu\n", garbage);

    printf("size-garbage: %s\n", garbage_buf.buf);

    foreach_alt_odb(print_alternate, NULL);

    strbuf_release(&loose_buf);

    strbuf_release(&pack_buf);

    strbuf_release(&garbage_buf);

  } else {

    struct strbuf buf = STRBUF_INIT;

    if (human_readable)

      strbuf_humanise_bytes(&buf, loose_size);

    else

      strbuf_addf(&buf, "%lu kilobytes",

            (unsigned long)(loose_size / 1024));

    printf("%lu objects, %s\n", loose, buf.buf);

    strbuf_release(&buf);

  }

  return 0;

}