t9300: factor out portable "head -c" replacement

diff --git a/diffcore-break.c b/diffcore-break.c
index 1d9e530a84758e34d616690684c4842cd1af4cfc..5473493e10551633659d0727626ffc2273ef4f73 100644 (file)
--- a/diffcore-break.c
+++ b/diffcore-break.c
@@ -246,6 +246,13 @@ static void merge_broken(struct diff_filepair *p,
 
        dp = diff_queue(outq, d->one, c->two);
        dp->score = p->score;
+       /*
+        * We will be one extra user of the same src side of the
+        * broken pair, if it was used as the rename source for other
+        * paths elsewhere.  Increment to mark that the path stays
+        * in the resulting tree.
+        */
+       d->one->rename_used++;
        diff_free_filespec_data(d->two);
        diff_free_filespec_data(c->one);
        free(d);