builtin/merge-recursive.c

   1 #include "builtin.h"
   2 #include "commit.h"
   3 #include "tag.h"
   4 #include "merge-recursive.h"
   5 #include "xdiff-interface.h"
   6
   7 static const char builtin_merge_recursive_usage[] =
   8         "git %s <base>... -- <head> <remote> ...";
   9
  10 static char *better_branch_name(const char *branch)
  11 {
  12         static char githead_env[8 + GIT_MAX_HEXSZ + 1];
  13         char *name;
  14
  15         if (strlen(branch) != the_hash_algo->hexsz)
  16                 return xstrdup(branch);
  17         xsnprintf(githead_env, sizeof(githead_env), "GITHEAD_%s", branch);
  18         name = getenv(githead_env);
  19         return xstrdup(name ? name : branch);
  20 }
  21
  22 int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
  23 {
  24         const struct object_id *bases[21];
  25         unsigned bases_count = 0;
  26         int i, failed;
  27         struct object_id h1, h2;
  28         struct merge_options o;
  29         char *better1, *better2;
  30         struct commit *result;
  31
  32         init_merge_options(&o, the_repository);
  33         if (argv[0] && ends_with(argv[0], "-subtree"))
  34                 o.subtree_shift = "";
  35
  36         if (argc < 4)
  37                 usagef(builtin_merge_recursive_usage, argv[0]);
  38
  39         for (i = 1; i < argc; ++i) {
  40                 const char *arg = argv[i];
  41
  42                 if (starts_with(arg, "--")) {
  43                         if (!arg[2])
  44                                 break;
  45                         if (parse_merge_opt(&o, arg + 2))
  46                                 die(_("unknown option %s"), arg);
  47                         continue;
  48                 }
  49                 if (bases_count < ARRAY_SIZE(bases)-1) {
  50                         struct object_id *oid = xmalloc(sizeof(struct object_id));
  51                         if (get_oid(argv[i], oid))
  52                                 die(_("could not parse object '%s'"), argv[i]);
  53                         bases[bases_count++] = oid;
  54                 }
  55                 else
  56                         warning(Q_("cannot handle more than %d base. "
  57                                    "Ignoring %s.",
  58                                    "cannot handle more than %d bases. "
  59                                    "Ignoring %s.",
  60                                     (int)ARRAY_SIZE(bases)-1),
  61                                 (int)ARRAY_SIZE(bases)-1, argv[i]);
  62         }
  63         if (argc - i != 3) /* "--" "<head>" "<remote>" */
  64                 die(_("not handling anything other than two heads merge."));
  65
  66         o.branch1 = argv[++i];
  67         o.branch2 = argv[++i];
  68
  69         if (get_oid(o.branch1, &h1))
  70                 die(_("could not resolve ref '%s'"), o.branch1);
  71         if (get_oid(o.branch2, &h2))
  72                 die(_("could not resolve ref '%s'"), o.branch2);
  73
  74         o.branch1 = better1 = better_branch_name(o.branch1);
  75         o.branch2 = better2 = better_branch_name(o.branch2);
  76
  77         if (o.verbosity >= 3)
  78                 printf(_("Merging %s with %s\n"), o.branch1, o.branch2);
  79
  80         failed = merge_recursive_generic(&o, &h1, &h2, bases_count, bases, &result);
  81
  82         free(better1);
  83         free(better2);
  84
  85         if (failed < 0)
  86                 return 128; /* die() error code */
  87         return failed;
  88 }