#include "builtin.h"
#include "cache.h"
+#include "config.h"
#include "commit.h"
+#include "refs.h"
+#include "diff.h"
+#include "revision.h"
#include "parse-options.h"
+#include "repository.h"
+#include "commit-reach.h"
static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
{
- struct commit_list *result;
+ struct commit_list *result, *r;
- result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0);
+ result = get_merge_bases_many_dirty(rev[0], rev_nr - 1, rev + 1);
if (!result)
return 1;
- while (result) {
- printf("%s\n", sha1_to_hex(result->item->object.sha1));
+ for (r = result; r; r = r->next) {
+ printf("%s\n", oid_to_hex(&r->item->object.oid));
if (!show_all)
- return 0;
- result = result->next;
+ break;
}
+ free_commit_list(result);
return 0;
}
static const char * const merge_base_usage[] = {
- N_("git merge-base [-a|--all] <commit> <commit>..."),
- N_("git merge-base [-a|--all] --octopus <commit>..."),
+ N_("git merge-base [-a | --all] <commit> <commit>..."),
+ N_("git merge-base [-a | --all] --octopus <commit>..."),
N_("git merge-base --independent <commit>..."),
N_("git merge-base --is-ancestor <commit> <commit>"),
+ N_("git merge-base --fork-point <ref> [<commit>]"),
NULL
};
static struct commit *get_commit_reference(const char *arg)
{
- unsigned char revkey[20];
+ struct object_id revkey;
struct commit *r;
- if (get_sha1(arg, revkey))
+ if (get_oid(arg, &revkey))
die("Not a valid object name %s", arg);
- r = lookup_commit_reference(revkey);
+ r = lookup_commit_reference(the_repository, &revkey);
if (!r)
die("Not a valid commit name %s", arg);
static int handle_independent(int count, const char **args)
{
- struct commit_list *revs = NULL;
- struct commit_list *result;
+ struct commit_list *revs = NULL, *rev;
int i;
for (i = count - 1; i >= 0; i--)
commit_list_insert(get_commit_reference(args[i]), &revs);
- result = reduce_heads(revs);
- if (!result)
+ reduce_heads_replace(&revs);
+
+ if (!revs)
return 1;
- while (result) {
- printf("%s\n", sha1_to_hex(result->item->object.sha1));
- result = result->next;
- }
+ for (rev = revs; rev; rev = rev->next)
+ printf("%s\n", oid_to_hex(&rev->item->object.oid));
+
+ free_commit_list(revs);
return 0;
}
static int handle_octopus(int count, const char **args, int show_all)
{
struct commit_list *revs = NULL;
- struct commit_list *result;
+ struct commit_list *result, *rev;
int i;
for (i = count - 1; i >= 0; i--)
commit_list_insert(get_commit_reference(args[i]), &revs);
- result = reduce_heads(get_octopus_merge_bases(revs));
+ result = get_octopus_merge_bases(revs);
+ free_commit_list(revs);
+ reduce_heads_replace(&result);
if (!result)
return 1;
- while (result) {
- printf("%s\n", sha1_to_hex(result->item->object.sha1));
+ for (rev = result; rev; rev = rev->next) {
+ printf("%s\n", oid_to_hex(&rev->item->object.oid));
if (!show_all)
- return 0;
- result = result->next;
+ break;
}
+ free_commit_list(result);
return 0;
}
return 1;
}
+static int handle_fork_point(int argc, const char **argv)
+{
+ struct object_id oid;
+ char *refname;
+ struct commit *derived, *fork_point;
+ const char *commitname;
+
+ switch (dwim_ref(argv[0], strlen(argv[0]), &oid, &refname)) {
+ case 0:
+ die("No such ref: '%s'", argv[0]);
+ case 1:
+ break; /* good */
+ default:
+ die("Ambiguous refname: '%s'", argv[0]);
+ }
+
+ commitname = (argc == 2) ? argv[1] : "HEAD";
+ if (get_oid(commitname, &oid))
+ die("Not a valid object name: '%s'", commitname);
+
+ derived = lookup_commit_reference(the_repository, &oid);
+
+ fork_point = get_fork_point(refname, derived);
+
+ if (!fork_point)
+ return 1;
+
+ printf("%s\n", oid_to_hex(&fork_point->object.oid));
+ return 0;
+}
+
int cmd_merge_base(int argc, const char **argv, const char *prefix)
{
struct commit **rev;
int rev_nr = 0;
int show_all = 0;
- int octopus = 0;
- int reduce = 0;
- int is_ancestor = 0;
+ int cmdmode = 0;
struct option options[] = {
OPT_BOOL('a', "all", &show_all, N_("output all common ancestors")),
- OPT_BOOL(0, "octopus", &octopus, N_("find ancestors for a single n-way merge")),
- OPT_BOOL(0, "independent", &reduce, N_("list revs not reachable from others")),
- OPT_BOOL(0, "is-ancestor", &is_ancestor,
- N_("is the first one ancestor of the other?")),
+ OPT_CMDMODE(0, "octopus", &cmdmode,
+ N_("find ancestors for a single n-way merge"), 'o'),
+ OPT_CMDMODE(0, "independent", &cmdmode,
+ N_("list revs not reachable from others"), 'r'),
+ OPT_CMDMODE(0, "is-ancestor", &cmdmode,
+ N_("is the first one ancestor of the other?"), 'a'),
+ OPT_CMDMODE(0, "fork-point", &cmdmode,
+ N_("find where <commit> forked from reflog of <ref>"), 'f'),
OPT_END()
};
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix, options, merge_base_usage, 0);
- if (!octopus && !reduce && argc < 2)
- usage_with_options(merge_base_usage, options);
- if (is_ancestor && (show_all || octopus || reduce))
- die("--is-ancestor cannot be used with other options");
- if (is_ancestor)
+
+ if (cmdmode == 'a') {
+ if (argc < 2)
+ usage_with_options(merge_base_usage, options);
+ if (show_all)
+ die("--is-ancestor cannot be used with --all");
return handle_is_ancestor(argc, argv);
- if (reduce && (show_all || octopus))
- die("--independent cannot be used with other options");
+ }
- if (octopus)
+ if (cmdmode == 'r' && show_all)
+ die("--independent cannot be used with --all");
+
+ if (cmdmode == 'o')
return handle_octopus(argc, argv, show_all);
- else if (reduce)
+
+ if (cmdmode == 'r')
return handle_independent(argc, argv);
- rev = xmalloc(argc * sizeof(*rev));
+ if (cmdmode == 'f') {
+ if (argc < 1 || 2 < argc)
+ usage_with_options(merge_base_usage, options);
+ return handle_fork_point(argc, argv);
+ }
+
+ if (argc < 2)
+ usage_with_options(merge_base_usage, options);
+
+ ALLOC_ARRAY(rev, argc);
while (argc-- > 0)
rev[rev_nr++] = get_commit_reference(*argv++);
return show_merge_base(rev, rev_nr, show_all);