Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "diff.h"
   3#include "diffcore.h"
   4#include "lockfile.h"
   5#include "commit.h"
   6#include "run-command.h"
   7#include "resolve-undo.h"
   8#include "tree-walk.h"
   9#include "unpack-trees.h"
  10#include "dir.h"
  11
  12static const char *merge_argument(struct commit *commit)
  13{
  14        if (commit)
  15                return oid_to_hex(&commit->object.oid);
  16        else
  17                return EMPTY_TREE_SHA1_HEX;
  18}
  19
  20int index_has_changes(struct strbuf *sb)
  21{
  22        struct object_id head;
  23        int i;
  24
  25        if (!get_oid_tree("HEAD", &head)) {
  26                struct diff_options opt;
  27
  28                diff_setup(&opt);
  29                opt.flags.exit_with_status = 1;
  30                if (!sb)
  31                        opt.flags.quick = 1;
  32                do_diff_cache(&head, &opt);
  33                diffcore_std(&opt);
  34                for (i = 0; sb && i < diff_queued_diff.nr; i++) {
  35                        if (i)
  36                                strbuf_addch(sb, ' ');
  37                        strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path);
  38                }
  39                diff_flush(&opt);
  40                return opt.flags.has_changes != 0;
  41        } else {
  42                for (i = 0; sb && i < active_nr; i++) {
  43                        if (i)
  44                                strbuf_addch(sb, ' ');
  45                        strbuf_addstr(sb, active_cache[i]->name);
  46                }
  47                return !!active_nr;
  48        }
  49}
  50
  51int try_merge_command(const char *strategy, size_t xopts_nr,
  52                      const char **xopts, struct commit_list *common,
  53                      const char *head_arg, struct commit_list *remotes)
  54{
  55        struct argv_array args = ARGV_ARRAY_INIT;
  56        int i, ret;
  57        struct commit_list *j;
  58
  59        argv_array_pushf(&args, "merge-%s", strategy);
  60        for (i = 0; i < xopts_nr; i++)
  61                argv_array_pushf(&args, "--%s", xopts[i]);
  62        for (j = common; j; j = j->next)
  63                argv_array_push(&args, merge_argument(j->item));
  64        argv_array_push(&args, "--");
  65        argv_array_push(&args, head_arg);
  66        for (j = remotes; j; j = j->next)
  67                argv_array_push(&args, merge_argument(j->item));
  68
  69        ret = run_command_v_opt(args.argv, RUN_GIT_CMD);
  70        argv_array_clear(&args);
  71
  72        discard_cache();
  73        if (read_cache() < 0)
  74                die(_("failed to read the cache"));
  75        resolve_undo_clear();
  76
  77        return ret;
  78}
  79
  80int checkout_fast_forward(const struct object_id *head,
  81                          const struct object_id *remote,
  82                          int overwrite_ignore)
  83{
  84        struct tree *trees[MAX_UNPACK_TREES];
  85        struct unpack_trees_options opts;
  86        struct tree_desc t[MAX_UNPACK_TREES];
  87        int i, nr_trees = 0;
  88        struct dir_struct dir;
  89        struct lock_file lock_file = LOCK_INIT;
  90
  91        refresh_cache(REFRESH_QUIET);
  92
  93        if (hold_locked_index(&lock_file, LOCK_REPORT_ON_ERROR) < 0)
  94                return -1;
  95
  96        memset(&trees, 0, sizeof(trees));
  97        memset(&opts, 0, sizeof(opts));
  98        memset(&t, 0, sizeof(t));
  99        if (overwrite_ignore) {
 100                memset(&dir, 0, sizeof(dir));
 101                dir.flags |= DIR_SHOW_IGNORED;
 102                setup_standard_excludes(&dir);
 103                opts.dir = &dir;
 104        }
 105
 106        opts.head_idx = 1;
 107        opts.src_index = &the_index;
 108        opts.dst_index = &the_index;
 109        opts.update = 1;
 110        opts.verbose_update = 1;
 111        opts.merge = 1;
 112        opts.fn = twoway_merge;
 113        setup_unpack_trees_porcelain(&opts, "merge");
 114
 115        trees[nr_trees] = parse_tree_indirect(head);
 116        if (!trees[nr_trees++]) {
 117                rollback_lock_file(&lock_file);
 118                return -1;
 119        }
 120        trees[nr_trees] = parse_tree_indirect(remote);
 121        if (!trees[nr_trees++]) {
 122                rollback_lock_file(&lock_file);
 123                return -1;
 124        }
 125        for (i = 0; i < nr_trees; i++) {
 126                parse_tree(trees[i]);
 127                init_tree_desc(t+i, trees[i]->buffer, trees[i]->size);
 128        }
 129        if (unpack_trees(nr_trees, t, &opts)) {
 130                rollback_lock_file(&lock_file);
 131                return -1;
 132        }
 133        if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 134                return error(_("unable to write new index file"));
 135        return 0;
 136}