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[thirdparty/git.git] / builtin / merge-recursive.c
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c2e86add 1#include "builtin.h"
6d297f81 2#include "commit.h"
6d297f81 3#include "tag.h"
e1b3a2ca 4#include "merge-recursive.h"
58a1ece4 5#include "xdiff-interface.h"
6d297f81 6
e78d01bf
TF
7static const char builtin_merge_recursive_usage[] =
8 "git %s <base>... -- <head> <remote> ...";
9
7ba3c078
SP
10static const char *better_branch_name(const char *branch)
11{
4e8161a8 12 static char githead_env[8 + GIT_SHA1_HEXSZ + 1];
7ba3c078
SP
13 char *name;
14
4e8161a8 15 if (strlen(branch) != GIT_SHA1_HEXSZ)
7ba3c078 16 return branch;
5096d490 17 xsnprintf(githead_env, sizeof(githead_env), "GITHEAD_%s", branch);
7ba3c078
SP
18 name = getenv(githead_env);
19 return name ? name : branch;
20}
21
e1b3a2ca 22int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
6d297f81 23{
4e8161a8 24 const struct object_id *bases[21];
73118f89
SB
25 unsigned bases_count = 0;
26 int i, failed;
4e8161a8 27 struct object_id h1, h2;
8a2fce18
MV
28 struct merge_options o;
29 struct commit *result;
6d297f81 30
8a2fce18 31 init_merge_options(&o);
59556548 32 if (argv[0] && ends_with(argv[0], "-subtree"))
85e51b78 33 o.subtree_shift = "";
68faf689 34
6d297f81 35 if (argc < 4)
e78d01bf 36 usagef(builtin_merge_recursive_usage, argv[0]);
6d297f81 37
6d297f81 38 for (i = 1; i < argc; ++i) {
8cc5b290
AP
39 const char *arg = argv[i];
40
59556548 41 if (starts_with(arg, "--")) {
8cc5b290
AP
42 if (!arg[2])
43 break;
635a7bb1 44 if (parse_merge_opt(&o, arg + 2))
ccf78131 45 die(_("unknown option %s"), arg);
8cc5b290
AP
46 continue;
47 }
8a2fce18 48 if (bases_count < ARRAY_SIZE(bases)-1) {
4e8161a8 49 struct object_id *oid = xmalloc(sizeof(struct object_id));
50 if (get_oid(argv[i], oid))
ccf78131 51 die(_("could not parse object '%s'"), argv[i]);
4e8161a8 52 bases[bases_count++] = oid;
73118f89 53 }
73118f89 54 else
ccf78131
VA
55 warning(Q_("cannot handle more than %d base. "
56 "Ignoring %s.",
57 "cannot handle more than %d bases. "
58 "Ignoring %s.",
59 (int)ARRAY_SIZE(bases)-1),
b74d779b 60 (int)ARRAY_SIZE(bases)-1, argv[i]);
6d297f81
JS
61 }
62 if (argc - i != 3) /* "--" "<head>" "<remote>" */
ccf78131 63 die(_("not handling anything other than two heads merge."));
6d297f81 64
8a2fce18
MV
65 o.branch1 = argv[++i];
66 o.branch2 = argv[++i];
6d297f81 67
4e8161a8 68 if (get_oid(o.branch1, &h1))
ccf78131 69 die(_("could not resolve ref '%s'"), o.branch1);
4e8161a8 70 if (get_oid(o.branch2, &h2))
ccf78131 71 die(_("could not resolve ref '%s'"), o.branch2);
6d297f81 72
8a2fce18
MV
73 o.branch1 = better_branch_name(o.branch1);
74 o.branch2 = better_branch_name(o.branch2);
3f6ee2d1 75
8a2fce18 76 if (o.verbosity >= 3)
765773c8 77 printf(_("Merging %s with %s\n"), o.branch1, o.branch2);
e0ec1819 78
4e8161a8 79 failed = merge_recursive_generic(&o, &h1, &h2, bases_count, bases, &result);
73118f89
SB
80 if (failed < 0)
81 return 128; /* die() error code */
82 return failed;
6d297f81 83}