This function is based on merge-recursive.c's get_directory_renames(),
except that the first half has been split out into a not-yet-implemented
compute_rename_counts(). The primary difference here is our lack of the
non_unique_new_dir boolean in our strmap. The lack of that field will
at first cause us to fail testcase 2b of t6423; however, future
optimizations will obviate the need for that ugly field so we have just
left it out.
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
merge-ort.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 59 insertions(+), 1 deletion(-)
diff --git a/merge-ort.c b/merge-ort.c
index 0bd0ab1e8b..6ccc7a1a45 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -1139,11 +1139,69 @@ static int handle_content_merge(struct merge_options *opt,
/*** Function Grouping: functions related to directory rename detection ***/
+static void compute_rename_counts(struct diff_queue_struct *pairs,
+ struct strmap *dir_rename_count,
+ struct strset *dirs_removed)
+{
+ die("Not yet implemented!");
+}
+
static void get_provisional_directory_renames(struct merge_options *opt,
unsigned side,
int *clean)
{
- die("Not yet implemented!");
+ struct hashmap_iter iter;
+ struct strmap_entry *entry;
+ struct rename_info *renames = &opt->priv->renames;
+
+ compute_rename_counts(&renames->pairs[side],
+ &renames->dir_rename_count[side],
+ &renames->dirs_removed[side]);
+ /*
+ * Collapse
+ * dir_rename_count: old_directory -> {new_directory -> count}
+ * down to
+ * dir_renames: old_directory -> best_new_directory
+ * where best_new_directory is the one with the unique highest count.
+ */
+ strmap_for_each_entry(&renames->dir_rename_count[side], &iter, entry) {
+ const char *source_dir = entry->key;
+ struct strintmap *counts = entry->value;
+ struct hashmap_iter count_iter;
+ struct strmap_entry *count_entry;
+ int max = 0;
+ int bad_max = 0;
+ const char *best = NULL;
+
+ strintmap_for_each_entry(counts, &count_iter, count_entry) {
+ const char *target_dir = count_entry->key;
+ intptr_t count = (intptr_t)count_entry->value;
+
+ if (count == max)
+ bad_max = max;
+ else if (count > max) {
+ max = count;
+ best = target_dir;
+ }
+ }
+
+ if (max == 0)
+ continue;
+
+ if (bad_max == max) {
+ path_msg(opt, source_dir, 0,
+ _("CONFLICT (directory rename split): "
+ "Unclear where to rename %s to; it was "
+ "renamed to multiple other directories, with "
+ "no destination getting a majority of the "
+ "files."),
+ source_dir);
+ *clean &= 0;
+ } else {
+ strmap_put(&renames->dir_renames[side],
+ source_dir, (void*)best);
+ }
+ }
}
static void handle_directory_level_conflicts(struct merge_options *opt)
--
2.29.1.106.g3ff750dc32.dirty
