Directory renames with the ability to merge directories opens up the
possibility of add/add/add/.../add conflicts, if each of the N
directories being merged into one target directory all had a file with
the same name. We need a way to check for and report on such
collisions; this hashmap will be used for this purpose.
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
merge-recursive.c | 23 +++++++++++++++++++++++
merge-recursive.h | 7 +++++++
2 files changed, 30 insertions(+)
diff --git a/merge-recursive.c b/merge-recursive.c
index 03897af883..472754c493 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -84,6 +84,29 @@ static void dir_rename_entry_init(struct dir_rename_entry *entry,
string_list_init(&entry->possible_new_dirs, 0);
}
+static struct collision_entry *collision_find_entry(struct hashmap *hashmap,
+ char *target_file)
+{
+ struct collision_entry key;
+
+ hashmap_entry_init(&key, strhash(target_file));
+ key.target_file = target_file;
+ return hashmap_get(hashmap, &key, NULL);
+}
+
+static int collision_cmp(void *unused_cmp_data,
+ const struct collision_entry *e1,
+ const struct collision_entry *e2,
+ const void *unused_keydata)
+{
+ return strcmp(e1->target_file, e2->target_file);
+}
+
+static void collision_init(struct hashmap *map)
+{
+ hashmap_init(map, (hashmap_cmp_fn) collision_cmp, NULL, 0);
+}
+
static void flush_output(struct merge_options *o)
{
if (o->buffer_output < 2 && o->obuf.len) {
diff --git a/merge-recursive.h b/merge-recursive.h
index a024949739..e02c1e1243 100644
--- a/merge-recursive.h
+++ b/merge-recursive.h
@@ -37,6 +37,13 @@ struct dir_rename_entry {
struct string_list possible_new_dirs;
};
+struct collision_entry {
+ struct hashmap_entry ent; /* must be the first member! */
+ char *target_file;
+ struct string_list source_files;
+ unsigned reported_already:1;
+};
+
/* merge_trees() but with recursive ancestor consolidation */
int merge_recursive(struct merge_options *o,
struct commit *h1,
--
2.15.0.309.g00c152f825
