Re: [PATCH v7 13/31] merge-recursive: introduce new functions to handle rename logic

2018-02-02 Thread Stefan Beller
On Tue, Jan 30, 2018 at 3:25 PM, Elijah Newren  wrote:
> The amount of logic in merge_trees() relative to renames was just a few
> lines, but split it out into new handle_renames() and cleanup_renames()
> functions to prepare for additional logic to be added to each.  No code or
> logic changes, just a new place to put stuff for when the rename detection
> gains additional checks.
>
> Note that process_renames() records pointers to various information (such
> as diff_filepairs) into rename_conflict_info structs.  Even though the
> rename string_lists are not directly used once handle_renames() completes,
> we should not immediately free the lists at the end of that function
> because they store the information referenced in the rename_conflict_info,
> which is used later in process_entry().  Thus the reason for a separate
> cleanup_renames().
>
> Signed-off-by: Elijah Newren 

Reviewed-by: Stefan Beller 


[PATCH v7 13/31] merge-recursive: introduce new functions to handle rename logic

2018-01-30 Thread Elijah Newren
The amount of logic in merge_trees() relative to renames was just a few
lines, but split it out into new handle_renames() and cleanup_renames()
functions to prepare for additional logic to be added to each.  No code or
logic changes, just a new place to put stuff for when the rename detection
gains additional checks.

Note that process_renames() records pointers to various information (such
as diff_filepairs) into rename_conflict_info structs.  Even though the
rename string_lists are not directly used once handle_renames() completes,
we should not immediately free the lists at the end of that function
because they store the information referenced in the rename_conflict_info,
which is used later in process_entry().  Thus the reason for a separate
cleanup_renames().

Signed-off-by: Elijah Newren 
---
 merge-recursive.c | 43 +--
 1 file changed, 33 insertions(+), 10 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index 2028dd113b..eac3041261 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1645,6 +1645,32 @@ static int process_renames(struct merge_options *o,
return clean_merge;
 }
 
+struct rename_info {
+   struct string_list *head_renames;
+   struct string_list *merge_renames;
+};
+
+static int handle_renames(struct merge_options *o,
+ struct tree *common,
+ struct tree *head,
+ struct tree *merge,
+ struct string_list *entries,
+ struct rename_info *ri)
+{
+   ri->head_renames  = get_renames(o, head, common, head, merge, entries);
+   ri->merge_renames = get_renames(o, merge, common, head, merge, entries);
+   return process_renames(o, ri->head_renames, ri->merge_renames);
+}
+
+static void cleanup_renames(struct rename_info *re_info)
+{
+   string_list_clear(re_info->head_renames, 0);
+   string_list_clear(re_info->merge_renames, 0);
+
+   free(re_info->head_renames);
+   free(re_info->merge_renames);
+}
+
 static struct object_id *stage_oid(const struct object_id *oid, unsigned mode)
 {
return (is_null_oid(oid) || mode == 0) ? NULL: (struct object_id *)oid;
@@ -2004,7 +2030,8 @@ int merge_trees(struct merge_options *o,
}
 
if (unmerged_cache()) {
-   struct string_list *entries, *re_head, *re_merge;
+   struct string_list *entries;
+   struct rename_info re_info;
int i;
/*
 * Only need the hashmap while processing entries, so
@@ -2018,9 +2045,8 @@ int merge_trees(struct merge_options *o,
get_files_dirs(o, merge);
 
entries = get_unmerged();
-   re_head  = get_renames(o, head, common, head, merge, entries);
-   re_merge = get_renames(o, merge, common, head, merge, entries);
-   clean = process_renames(o, re_head, re_merge);
+   clean = handle_renames(o, common, head, merge, entries,
+  &re_info);
record_df_conflict_files(o, entries);
if (clean < 0)
goto cleanup;
@@ -2045,16 +2071,13 @@ int merge_trees(struct merge_options *o,
}
 
 cleanup:
-   string_list_clear(re_merge, 0);
-   string_list_clear(re_head, 0);
+   cleanup_renames(&re_info);
+
string_list_clear(entries, 1);
+   free(entries);
 
hashmap_free(&o->current_file_dir_set, 1);
 
-   free(re_merge);
-   free(re_head);
-   free(entries);
-
if (clean < 0)
return clean;
}
-- 
2.16.1.106.gf69932adfe