Andrew's git - gitweb.git/blob - builtin-merge-recursive.c

   1#include "cache.h"
   2#include "commit.h"
   3#include "tag.h"
   4#include "merge-recursive.h"
   5
   6static const char *better_branch_name(const char *branch)
   7{
   8        static char githead_env[8 + 40 + 1];
   9        char *name;
  10
  11        if (strlen(branch) != 40)
  12                return branch;
  13        sprintf(githead_env, "GITHEAD_%s", branch);
  14        name = getenv(githead_env);
  15        return name ? name : branch;
  16}
  17
  18int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
  19{
  20        const unsigned char *bases[21];
  21        unsigned bases_count = 0;
  22        int i, failed;
  23        unsigned char h1[20], h2[20];
  24        struct merge_options o;
  25        struct commit *result;
  26
  27        init_merge_options(&o);
  28        if (argv[0]) {
  29                int namelen = strlen(argv[0]);
  30                if (8 < namelen &&
  31                    !strcmp(argv[0] + namelen - 8, "-subtree"))
  32                        o.subtree_merge = 1;
  33        }
  34
  35        if (argc < 4)
  36                die("Usage: %s <base>... -- <head> <remote> ...\n", argv[0]);
  37
  38        for (i = 1; i < argc; ++i) {
  39                if (!strcmp(argv[i], "--"))
  40                        break;
  41                if (bases_count < ARRAY_SIZE(bases)-1) {
  42                        unsigned char *sha = xmalloc(20);
  43                        if (get_sha1(argv[i], sha))
  44                                die("Could not parse object '%s'", argv[i]);
  45                        bases[bases_count++] = sha;
  46                }
  47                else
  48                        warning("Cannot handle more than %zu bases. "
  49                                "Ignoring %s.", ARRAY_SIZE(bases)-1, argv[i]);
  50        }
  51        if (argc - i != 3) /* "--" "<head>" "<remote>" */
  52                die("Not handling anything other than two heads merge.");
  53
  54        o.branch1 = argv[++i];
  55        o.branch2 = argv[++i];
  56
  57        if (get_sha1(o.branch1, h1))
  58                die("Could not resolve ref '%s'", o.branch1);
  59        if (get_sha1(o.branch2, h2))
  60                die("Could not resolve ref '%s'", o.branch2);
  61
  62        o.branch1 = better_branch_name(o.branch1);
  63        o.branch2 = better_branch_name(o.branch2);
  64
  65        if (o.verbosity >= 3)
  66                printf("Merging %s with %s\n", o.branch1, o.branch2);
  67
  68        failed = merge_recursive_generic(&o, h1, h2, bases_count, bases, &result);
  69        if (failed < 0)
  70                return 128; /* die() error code */
  71        return failed;
  72}