Andrew's git - gitweb.git/blob

   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7#include "tree.h"
   8#include "cache-tree.h"
   9
  10static int missing_ok = 0;
  11
  12static const char write_tree_usage[] = "git-write-tree [--missing-ok]";
  13
  14static struct cache_file cache_file;
  15
  16int main(int argc, char **argv)
  17{
  18        int entries, was_valid, newfd;
  19
  20        setup_git_directory();
  21
  22        newfd = hold_index_file_for_update(&cache_file, get_index_file());
  23        entries = read_cache();
  24        if (argc == 2) {
  25                if (!strcmp(argv[1], "--missing-ok"))
  26                        missing_ok = 1;
  27                else
  28                        die(write_tree_usage);
  29        }
  30        
  31        if (argc > 2)
  32                die("too many options");
  33
  34        if (entries < 0)
  35                die("git-write-tree: error reading cache");
  36
  37        if (!active_cache_tree)
  38                active_cache_tree = cache_tree();
  39
  40        was_valid = cache_tree_fully_valid(active_cache_tree);
  41        if (!was_valid) {
  42                if (cache_tree_update(active_cache_tree,
  43                                      active_cache, active_nr,
  44                                      missing_ok) < 0)
  45                        die("git-write-tree: error building trees");
  46                if (0 <= newfd) {
  47                        if (!write_cache(newfd, active_cache, active_nr))
  48                                commit_index_file(&cache_file);
  49                }
  50                /* Not being able to write is fine -- we are only interested
  51                 * in updating the cache-tree part, and if the next caller
  52                 * ends up using the old index with unupdated cache-tree part
  53                 * it misses the work we did here, but that is just a
  54                 * performance penalty and not a big deal.
  55                 */
  56        }
  57        printf("%s\n", sha1_to_hex(active_cache_tree->sha1));
  58        return 0;
  59}