commit: allow associating auxiliary info on-demand

diff --git a/merge-recursive.c b/merge-recursive.c
index 33ba5dc07c86a81f0989927b9a6167833815533f..ea9dbd307c60a16f290b44964c386e566b6bc7e3 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -2068,6 +2068,15 @@ int parse_merge_opt(struct merge_options *o, const char *s)
                o->xdl_opts = DIFF_WITH_ALG(o, PATIENCE_DIFF);
        else if (!strcmp(s, "histogram"))
                o->xdl_opts = DIFF_WITH_ALG(o, HISTOGRAM_DIFF);
+       else if (!strcmp(s, "diff-algorithm=")) {
+               long value = parse_algorithm_value(s+15);
+               if (value < 0)
+                       return -1;
+               /* clear out previous settings */
+               DIFF_XDL_CLR(o, NEED_MINIMAL);
+               o->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
+               o->xdl_opts |= value;
+       }
        else if (!strcmp(s, "ignore-space-change"))
                o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
        else if (!strcmp(s, "ignore-all-space"))