This function is based on the first half of get_directory_renames() from
merge-recursive.c
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
merge-ort.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 51 insertions(+), 2 deletions(-)
diff --git a/merge-ort.c b/merge-ort.c
index 19c3f8d41d..05bac9c5bd 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -1139,7 +1139,6 @@ static int handle_content_merge(struct merge_options *opt,
/*** Function Grouping: functions related to directory rename detection ***/
-MAYBE_UNUSED
static void get_renamed_dir_portion(const char *old_path, const char *new_path,
char **old_dir, char **new_dir)
{
@@ -1243,11 +1242,61 @@ static void get_renamed_dir_portion(const char *old_path, const char *new_path,
*new_dir = xstrndup(new_path, end_of_new - new_path);
}
+static void increment_count(struct strmap *dir_rename_count,
+ char *old_dir,
+ char *new_dir)
+{
+ struct strintmap *counts;
+ struct strmap_entry *e;
+
+ /* Get the {new_dirs -> counts} mapping using old_dir */
+ e = strmap_get_entry(dir_rename_count, old_dir);
+ if (e) {
+ counts = e->value;
+ } else {
+ counts = xmalloc(sizeof(*counts));
+ strintmap_init_with_options(counts, 0, NULL, 1);
+ strmap_put(dir_rename_count, old_dir, counts);
+ }
+
+ /* Increment the count for new_dir */
+ strintmap_incr(counts, new_dir, 1);
+}
+
static void compute_rename_counts(struct diff_queue_struct *pairs,
struct strmap *dir_rename_count,
struct strset *dirs_removed)
{
- die("Not yet implemented!");
+ int i;
+
+ for (i = 0; i < pairs->nr; ++i) {
+ char *old_dir, *new_dir;
+ struct diff_filepair *pair = pairs->queue[i];
+
+ if (pair->status != 'R')
+ continue;
+
+ /* Get the old and new directory names */
+ get_renamed_dir_portion(pair->one->path, pair->two->path,
+ &old_dir, &new_dir);
+ if (!old_dir)
+ /* Directory didn't change at all; ignore this one. */
+ continue;
+
+ /*
+ * Make dir_rename_count contain a map of a map:
+ * old_directory -> {new_directory -> count}
+ * In other words, for every pair look at the directories for
+ * the old filename and the new filename and count how many
+ * times that pairing occurs.
+ */
+ if (strset_contains(dirs_removed, old_dir))
+ increment_count(dir_rename_count, old_dir, new_dir);
+
+ /* Free resources we don't need anymore */
+ free(old_dir);
+ free(new_dir);
+ }
}
static void get_provisional_directory_renames(struct merge_options *opt,
--
2.29.1.106.g3ff750dc32.dirty
