The callers of get_merge_bases() can choose to leave object flags
used during the merge-base traversal by passing cleanup=0 as a
parameter, but in practice a very few callers can afford to do so
(namely, "git merge-base"), as they need to compute merge base in
preparation for other processing of their own and they need to see
the object without contaminate flags.
Change the function signature of get_merge_bases_many() and
get_merge_bases() to drop the cleanup parameter, so that the
majority of the callers do not have to say ", 1" at the end.
Give a new get_merge_bases_many_dirty() API to support only a few
callers that know they do not need to spend cycles cleaning up the
object flags.
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
* This comes on top of the previous "is it kosher for bisect to use
the 'cleanup=0' variant in the merge-base computation upfront? I
do not think so" patch.
bisect.c | 2 +-
builtin/merge-base.c | 4 ++--
builtin/merge.c | 4 ++--
builtin/rev-parse.c | 2 +-
commit.c | 29 +++++++++++++++++++++--------
commit.h | 7 +++++--
merge-recursive.c | 2 +-
notes-merge.c | 2 +-
revision.c | 4 ++--
sha1_name.c | 2 +-
submodule.c | 2 +-
11 files changed, 38 insertions(+), 22 deletions(-)
diff --git a/bisect.c b/bisect.c
index ccca3b5..8c6d843 100644
--- a/bisect.c
+++ b/bisect.c
@@ -777,7 +777,7 @@ static void check_merge_bases(int no_checkout)
int rev_nr;
struct commit **rev = get_bad_and_good_commits(&rev_nr);
- result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 1);
+ result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1);
for (; result; result = result->next) {
const unsigned char *mb = result->item->object.sha1;
diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index 0ecde8d..fdebef6 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -10,7 +10,7 @@ static int show_merge_base(struct commit **rev, int rev_nr,
int show_all)
{
struct commit_list *result;
- 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;
@@ -176,7 +176,7 @@ static int handle_fork_point(int argc, const char **argv)
for (i = 0; i < revs.nr; i++)
revs.commit[i]->object.flags &= ~TMP_MARK;
- bases = get_merge_bases_many(derived, revs.nr, revs.commit, 0);
+ bases = get_merge_bases_many_dirty(derived, revs.nr, revs.commit);
/*
* There should be one and only one merge base, when we found
diff --git a/builtin/merge.c b/builtin/merge.c
index bebbe5b..5249f4e 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1320,7 +1320,7 @@ int cmd_merge(int argc, const char **argv, const char
*prefix)
if (!remoteheads)
; /* already up-to-date */
else if (!remoteheads->next)
- common = get_merge_bases(head_commit, remoteheads->item, 1);
+ common = get_merge_bases(head_commit, remoteheads->item);
else {
struct commit_list *list = remoteheads;
commit_list_insert(head_commit, &list);
@@ -1417,7 +1417,7 @@ int cmd_merge(int argc, const char **argv, const char
*prefix)
* merge_bases again, otherwise "git merge HEAD^
* HEAD^^" would be missed.
*/
- common_one = get_merge_bases(head_commit, j->item, 1);
+ common_one = get_merge_bases(head_commit, j->item);
if (hashcmp(common_one->item->object.sha1,
j->item->object.sha1)) {
up_to_date = 0;
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index 35d3c43..95328b8 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -279,7 +279,7 @@ static int try_difference(const char *arg)
struct commit *a, *b;
a = lookup_commit_reference(sha1);
b = lookup_commit_reference(end);
- exclude = get_merge_bases(a, b, 1);
+ exclude = get_merge_bases(a, b);
while (exclude) {
struct commit_list *n = exclude->next;
show_rev(REVERSED,
diff --git a/commit.c b/commit.c
index 19cf8f9..d13250e 100644
--- a/commit.c
+++ b/commit.c
@@ -867,7 +867,7 @@ struct commit_list *get_octopus_merge_bases(struct
commit_list *in)
for (j = ret; j; j = j->next) {
struct commit_list *bases;
- bases = get_merge_bases(i->item, j->item, 1);
+ bases = get_merge_bases(i->item, j->item);
if (!new)
new = bases;
else
@@ -936,10 +936,10 @@ static int remove_redundant(struct commit **array, int
cnt)
return filled;
}
-struct commit_list *get_merge_bases_many(struct commit *one,
- int n,
- struct commit **twos,
- int cleanup)
+static struct commit_list *get_merge_bases_many_0(struct commit *one,
+ int n,
+ struct commit **twos,
+ int cleanup)
{
struct commit_list *list;
struct commit **rslt;
@@ -977,10 +977,23 @@ struct commit_list *get_merge_bases_many(struct commit
*one,
return result;
}
-struct commit_list *get_merge_bases(struct commit *one, struct commit *two,
- int cleanup)
+struct commit_list *get_merge_bases_many(struct commit *one,
+ int n,
+ struct commit **twos)
+{
+ return get_merge_bases_many_0(one, n, twos, 1);
+}
+
+struct commit_list *get_merge_bases_many_dirty(struct commit *one,
+ int n,
+ struct commit **twos)
+{
+ return get_merge_bases_many_0(one, n, twos, 0);
+}
+
+struct commit_list *get_merge_bases(struct commit *one, struct commit *two)
{
- return get_merge_bases_many(one, 1, &two, cleanup);
+ return get_merge_bases_many_0(one, 1, &two, 1);
}
/*
diff --git a/commit.h b/commit.h
index bc68ccb..28bc553 100644
--- a/commit.h
+++ b/commit.h
@@ -236,10 +236,13 @@ struct commit_graft *read_graft_line(char *buf, int len);
int register_commit_graft(struct commit_graft *, int);
struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
-extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit
*rev2, int cleanup);
-extern struct commit_list *get_merge_bases_many(struct commit *one, int n,
struct commit **twos, int cleanup);
+extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit
*rev2);
+extern struct commit_list *get_merge_bases_many(struct commit *one, int n,
struct commit **twos);
extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
+/* To be used only when object flags after this call no longer matter */
+extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int
n, struct commit **twos);
+
/* largest positive number a signed 32-bit integer can contain */
#define INFINITE_DEPTH 0x7fffffff
diff --git a/merge-recursive.c b/merge-recursive.c
index fdb7d0f..f758f7e 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1904,7 +1904,7 @@ int merge_recursive(struct merge_options *o,
}
if (!ca) {
- ca = get_merge_bases(h1, h2, 1);
+ ca = get_merge_bases(h1, h2);
ca = reverse_commit_list(ca);
}
diff --git a/notes-merge.c b/notes-merge.c
index 7eb9d7a..109ff4e 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -594,7 +594,7 @@ int notes_merge(struct notes_merge_options *o,
assert(local && remote);
/* Find merge bases */
- bases = get_merge_bases(local, remote, 1);
+ bases = get_merge_bases(local, remote);
if (!bases) {
base_sha1 = null_sha1;
base_tree_sha1 = EMPTY_TREE_SHA1_BIN;
diff --git a/revision.c b/revision.c
index 75dda92..14e0e03 100644
--- a/revision.c
+++ b/revision.c
@@ -1441,7 +1441,7 @@ static void prepare_show_merge(struct rev_info *revs)
other = lookup_commit_or_die(sha1, "MERGE_HEAD");
add_pending_object(revs, &head->object, "HEAD");
add_pending_object(revs, &other->object, "MERGE_HEAD");
- bases = get_merge_bases(head, other, 1);
+ bases = get_merge_bases(head, other);
add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING |
BOTTOM);
add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM);
free_commit_list(bases);
@@ -1546,7 +1546,7 @@ int handle_revision_arg(const char *arg_, struct rev_info
*revs, int flags, unsi
: lookup_commit_reference(b_obj->sha1));
if (!a || !b)
goto missing;
- exclude = get_merge_bases(a, b, 1);
+ exclude = get_merge_bases(a, b);
add_rev_cmdline_list(revs, exclude,
REV_CMD_MERGE_BASE,
flags_exclude);
diff --git a/sha1_name.c b/sha1_name.c
index 5b004f5..9737557 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -993,7 +993,7 @@ int get_sha1_mb(const char *name, unsigned char *sha1)
two = lookup_commit_reference_gently(sha1_tmp, 0);
if (!two)
return -1;
- mbs = get_merge_bases(one, two, 1);
+ mbs = get_merge_bases(one, two);
if (!mbs || mbs->next)
st = -1;
else {
diff --git a/submodule.c b/submodule.c
index 0690dc5..d37d400 100644
--- a/submodule.c
+++ b/submodule.c
@@ -301,7 +301,7 @@ static int prepare_submodule_summary(struct rev_info *rev,
const char *path,
left->object.flags |= SYMMETRIC_LEFT;
add_pending_object(rev, &left->object, path);
add_pending_object(rev, &right->object, path);
- merge_bases = get_merge_bases(left, right, 1);
+ merge_bases = get_merge_bases(left, right);
if (merge_bases) {
if (merge_bases->item == left)
*fast_forward = 1;
--
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