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merge-recursive: remove useless parameter in merge_trees() 

merge_trees() took a results parameter that would only be written when
opt->call_depth was positive, which is never the case now that
merge_trees_internal() has been split from merge_trees().  Remove the
misleading and unused parameter from merge_trees().

While at it, add some comments explaining how the output of
merge_trees() and merge_recursive() differ.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2019-08-17 11:41:30 -07:00 committed by Junio C Hamano
parent 98a1d3d888
commit b4db8a2b76
4 changed files with 22 additions and 12 deletions
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4
builtin/checkout.c
View File

@ -708,7 +708,6 @@ static int merge_working_tree(const struct checkout_opts *opts,
* give up or do a real merge, depending on * give up or do a real merge, depending on
* whether the merge flag was used. * whether the merge flag was used.
*/ */
struct tree *result;
struct tree *work; struct tree *work;
struct tree *old_tree; struct tree *old_tree;
struct merge_options o; struct merge_options o;
@ -780,8 +779,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
ret = merge_trees(&o, ret = merge_trees(&o,
new_tree, new_tree,
work, work,
old_tree, old_tree);
&result);
if (ret < 0) if (ret < 0)
exit(128); exit(128);
ret = reset_tree(new_tree, ret = reset_tree(new_tree,

6
merge-recursive.c
View File

@ -3623,16 +3623,16 @@ static void merge_finalize(struct merge_options *opt)
int merge_trees(struct merge_options *opt, int merge_trees(struct merge_options *opt,
struct tree *head, struct tree *head,
struct tree *merge, struct tree *merge,
struct tree *common, struct tree *common)
struct tree **result)
{ {
int clean; int clean;
struct tree *ignored;
assert(opt->ancestor != NULL); assert(opt->ancestor != NULL);
if (merge_start(opt, head)) if (merge_start(opt, head))
return -1; return -1;
clean = merge_trees_internal(opt, head, merge, common, result); clean = merge_trees_internal(opt, head, merge, common, &ignored);
merge_finalize(opt); merge_finalize(opt);
return clean; return clean;

20
merge-recursive.h
View File

@ -74,19 +74,31 @@ static inline int merge_detect_rename(struct merge_options *o)
o->diff_detect_rename >= 0 ? o->diff_detect_rename : 1; o->diff_detect_rename >= 0 ? o->diff_detect_rename : 1;
} }
/* merge_trees() but with recursive ancestor consolidation */ /*
* merge_recursive is like merge_trees() but with recursive ancestor
* consolidation, and when successful, it creates an actual commit
* and writes its address to *result.
*
* NOTE: empirically, about a decade ago it was determined that with more
* than two merge bases, optimal behavior was found when the
* ancestors were passed in the order of oldest merge base to newest
* one. Also, ancestors will be consumed (emptied) so make a copy if
* you need it.
*/
int merge_recursive(struct merge_options *o, int merge_recursive(struct merge_options *o,
struct commit *h1, struct commit *h1,
struct commit *h2, struct commit *h2,
struct commit_list *ancestors, struct commit_list *ancestors,
struct commit **result); struct commit **result);
/* rename-detecting three-way merge, no recursion */ /*
* rename-detecting three-way merge, no recursion; result of merge is written
* to opt->repo->index.
*/
int merge_trees(struct merge_options *o, int merge_trees(struct merge_options *o,
struct tree *head, struct tree *head,
struct tree *merge, struct tree *merge,
struct tree *common, struct tree *common);
struct tree **result);
/* /*
* "git-merge-recursive" can be fed trees; wrap them into * "git-merge-recursive" can be fed trees; wrap them into

4
sequencer.c
View File

@ -586,7 +586,7 @@ static int do_recursive_merge(struct repository *r,
struct replay_opts *opts) struct replay_opts *opts)
{ {
struct merge_options o; struct merge_options o;
struct tree *result, *next_tree, *base_tree, *head_tree; struct tree *next_tree, *base_tree, *head_tree;
int clean; int clean;
char **xopt; char **xopt;
struct lock_file index_lock = LOCK_INIT; struct lock_file index_lock = LOCK_INIT;
@ -613,7 +613,7 @@ static int do_recursive_merge(struct repository *r,
clean = merge_trees(&o, clean = merge_trees(&o,
head_tree, head_tree,
next_tree, base_tree, &result); next_tree, base_tree);
if (is_rebase_i(opts) && clean <= 0) if (is_rebase_i(opts) && clean <= 0)
fputs(o.obuf.buf, stdout); fputs(o.obuf.buf, stdout);
strbuf_release(&o.obuf); strbuf_release(&o.obuf);