git/builtin/merge-base.c
Elijah Newren eea0e59ffb treewide: remove unnecessary includes in source files
Each of these were checked with
   gcc -E -I. ${SOURCE_FILE} | grep ${HEADER_FILE}
to ensure that removing the direct inclusion of the header actually
resulted in that header no longer being included at all (i.e. that
no other header pulled it in transitively).

...except for a few cases where we verified that although the header
was brought in transitively, nothing from it was directly used in
that source file.  These cases were:
  * builtin/credential-cache.c
  * builtin/pull.c
  * builtin/send-pack.c

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-12-26 12:04:31 -08:00

194 lines
4.6 KiB
C

#include "builtin.h"
#include "config.h"
#include "commit.h"
#include "gettext.h"
#include "hex.h"
#include "object-name.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, *r;
result = repo_get_merge_bases_many_dirty(the_repository, rev[0],
rev_nr - 1, rev + 1);
if (!result)
return 1;
for (r = result; r; r = r->next) {
printf("%s\n", oid_to_hex(&r->item->object.oid));
if (!show_all)
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 --is-ancestor <commit> <commit>"),
N_("git merge-base --independent <commit>..."),
N_("git merge-base --fork-point <ref> [<commit>]"),
NULL
};
static struct commit *get_commit_reference(const char *arg)
{
struct object_id revkey;
struct commit *r;
if (repo_get_oid(the_repository, arg, &revkey))
die("Not a valid object name %s", arg);
r = lookup_commit_reference(the_repository, &revkey);
if (!r)
die("Not a valid commit name %s", arg);
return r;
}
static int handle_independent(int count, const char **args)
{
struct commit_list *revs = NULL, *rev;
int i;
for (i = count - 1; i >= 0; i--)
commit_list_insert(get_commit_reference(args[i]), &revs);
reduce_heads_replace(&revs);
if (!revs)
return 1;
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, *rev;
int i;
for (i = count - 1; i >= 0; i--)
commit_list_insert(get_commit_reference(args[i]), &revs);
result = get_octopus_merge_bases(revs);
free_commit_list(revs);
reduce_heads_replace(&result);
if (!result)
return 1;
for (rev = result; rev; rev = rev->next) {
printf("%s\n", oid_to_hex(&rev->item->object.oid));
if (!show_all)
break;
}
free_commit_list(result);
return 0;
}
static int handle_is_ancestor(int argc, const char **argv)
{
struct commit *one, *two;
if (argc != 2)
die("--is-ancestor takes exactly two commits");
one = get_commit_reference(argv[0]);
two = get_commit_reference(argv[1]);
if (repo_in_merge_bases(the_repository, one, two))
return 0;
else
return 1;
}
static int handle_fork_point(int argc, const char **argv)
{
struct object_id oid;
struct commit *derived, *fork_point;
const char *commitname;
commitname = (argc == 2) ? argv[1] : "HEAD";
if (repo_get_oid(the_repository, commitname, &oid))
die("Not a valid object name: '%s'", commitname);
derived = lookup_commit_reference(the_repository, &oid);
fork_point = get_fork_point(argv[0], 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 cmdmode = 0;
int ret;
struct option options[] = {
OPT_BOOL('a', "all", &show_all, N_("output all common ancestors")),
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 (cmdmode == 'a') {
if (argc < 2)
usage_with_options(merge_base_usage, options);
if (show_all)
die(_("options '%s' and '%s' cannot be used together"),
"--is-ancestor", "--all");
return handle_is_ancestor(argc, argv);
}
if (cmdmode == 'r' && show_all)
die(_("options '%s' and '%s' cannot be used together"),
"--independent", "--all");
if (cmdmode == 'o')
return handle_octopus(argc, argv, show_all);
if (cmdmode == 'r')
return handle_independent(argc, argv);
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++);
ret = show_merge_base(rev, rev_nr, show_all);
free(rev);
return ret;
}