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merge-recursive: provide pair of `unpack_trees_{start,finish}()` 

Rename `git_merge_trees()` to `unpack_trees_start()` and extract the
call to `discard_index()` into a new function `unpack_trees_finish()`.
As a result, these are called early resp. late in `merge_trees()`,
making the resource handling clearer. A later commit will expand on
that, teaching `..._finish()` to free more memory. (So rather than
moving the FIXME-comment, just drop it, since it will be addressed soon
enough.)

Also call `..._finish()` when `merge_trees()` returns early.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2018-05-20 12:17:35 +02:00 committed by Junio C Hamano
parent 89e653da5b
commit 3f1c1c3600
1 changed files with 15 additions and 14 deletions
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29
merge-recursive.c
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@ -337,10 +337,10 @@ static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
init_tree_desc(desc, tree->buffer, tree->size);
}
static int git_merge_trees(struct merge_options *o,
struct tree *common,
struct tree *head,
struct tree *merge)
static int unpack_trees_start(struct merge_options *o,
struct tree *common,
struct tree *head,
struct tree *merge)
{
int rc;
struct tree_desc t[3];
@ -379,6 +379,11 @@ static int git_merge_trees(struct merge_options *o,
return rc;
}
static void unpack_trees_finish(struct merge_options *o)
{
discard_index(&o->orig_index);
}
struct tree *write_tree_from_memory(struct merge_options *o)
{
struct tree *result = NULL;
@ -3088,13 +3093,14 @@ int merge_trees(struct merge_options *o,
return 1;
}
code = git_merge_trees(o, common, head, merge);
code = unpack_trees_start(o, common, head, merge);
if (code != 0) {
if (show(o, 4) || o->call_depth)
err(o, _("merging of trees %s and %s failed"),
oid_to_hex(&head->object.oid),
oid_to_hex(&merge->object.oid));
unpack_trees_finish(o);
return -1;
}
@ -3147,20 +3153,15 @@ int merge_trees(struct merge_options *o,
hashmap_free(&o->current_file_dir_set, 1);
if (clean < 0)
if (clean < 0) {
unpack_trees_finish(o);
return clean;
}
}
else
clean = 1;
/* Free the extra index left from git_merge_trees() */
/*
* FIXME: Need to also free data allocated by
* setup_unpack_trees_porcelain() tucked away in o->unpack_opts.msgs,
* but the problem is that only half of it refers to dynamically
* allocated data, while the other half points at static strings.
*/
discard_index(&o->orig_index);
unpack_trees_finish(o);
if (o->call_depth && !(*result = write_tree_from_memory(o)))
return -1;