Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "lockfile.h"
   3#include "commit.h"
   4#include "run-command.h"
   5#include "resolve-undo.h"
   6#include "tree-walk.h"
   7#include "unpack-trees.h"
   8#include "dir.h"
   9
  10static const char *merge_argument(struct commit *commit)
  11{
  12        if (commit)
  13                return sha1_to_hex(commit->object.sha1);
  14        else
  15                return EMPTY_TREE_SHA1_HEX;
  16}
  17
  18int try_merge_command(const char *strategy, size_t xopts_nr,
  19                      const char **xopts, struct commit_list *common,
  20                      const char *head_arg, struct commit_list *remotes)
  21{
  22        struct argv_array args = ARGV_ARRAY_INIT;
  23        int i, ret;
  24        struct commit_list *j;
  25
  26        argv_array_pushf(&args, "merge-%s", strategy);
  27        for (i = 0; i < xopts_nr; i++)
  28                argv_array_pushf(&args, "--%s", xopts[i]);
  29        for (j = common; j; j = j->next)
  30                argv_array_push(&args, merge_argument(j->item));
  31        argv_array_push(&args, "--");
  32        argv_array_push(&args, head_arg);
  33        for (j = remotes; j; j = j->next)
  34                argv_array_push(&args, merge_argument(j->item));
  35
  36        ret = run_command_v_opt(args.argv, RUN_GIT_CMD);
  37        argv_array_clear(&args);
  38
  39        discard_cache();
  40        if (read_cache() < 0)
  41                die(_("failed to read the cache"));
  42        resolve_undo_clear();
  43
  44        return ret;
  45}
  46
  47int checkout_fast_forward(const unsigned char *head,
  48                          const unsigned char *remote,
  49                          int overwrite_ignore)
  50{
  51        struct tree *trees[MAX_UNPACK_TREES];
  52        struct unpack_trees_options opts;
  53        struct tree_desc t[MAX_UNPACK_TREES];
  54        int i, nr_trees = 0;
  55        struct dir_struct dir;
  56        struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
  57
  58        refresh_cache(REFRESH_QUIET);
  59
  60        hold_locked_index(lock_file, 1);
  61
  62        memset(&trees, 0, sizeof(trees));
  63        memset(&opts, 0, sizeof(opts));
  64        memset(&t, 0, sizeof(t));
  65        if (overwrite_ignore) {
  66                memset(&dir, 0, sizeof(dir));
  67                dir.flags |= DIR_SHOW_IGNORED;
  68                setup_standard_excludes(&dir);
  69                opts.dir = &dir;
  70        }
  71
  72        opts.head_idx = 1;
  73        opts.src_index = &the_index;
  74        opts.dst_index = &the_index;
  75        opts.update = 1;
  76        opts.verbose_update = 1;
  77        opts.merge = 1;
  78        opts.fn = twoway_merge;
  79        setup_unpack_trees_porcelain(&opts, "merge");
  80
  81        trees[nr_trees] = parse_tree_indirect(head);
  82        if (!trees[nr_trees++])
  83                return -1;
  84        trees[nr_trees] = parse_tree_indirect(remote);
  85        if (!trees[nr_trees++])
  86                return -1;
  87        for (i = 0; i < nr_trees; i++) {
  88                parse_tree(trees[i]);
  89                init_tree_desc(t+i, trees[i]->buffer, trees[i]->size);
  90        }
  91        if (unpack_trees(nr_trees, t, &opts))
  92                return -1;
  93        if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
  94                die(_("unable to write new index file"));
  95        return 0;
  96}