commit: allow associating auxiliary info on-demand

diff --git a/merge-recursive.c b/merge-recursive.c
index d8820604ca3535ce25796012412fe69f1cbdd37b..ea9dbd307c60a16f290b44964c386e566b6bc7e3 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -976,7 +976,7 @@ merge_file_special_markers(struct merge_options *o,
        return mfi;
 }
 
-static struct merge_file_info merge_file(struct merge_options *o,
+static struct merge_file_info merge_file_one(struct merge_options *o,
                                         const char *path,
                                         const unsigned char *o_sha, int o_mode,
                                         const unsigned char *a_sha, int a_mode,
@@ -1166,7 +1166,7 @@ static void conflict_rename_rename_1to2(struct merge_options *o,
                struct merge_file_info mfi;
                struct diff_filespec other;
                struct diff_filespec *add;
-               mfi = merge_file(o, one->path,
+               mfi = merge_file_one(o, one->path,
                                 one->sha1, one->mode,
                                 a->sha1, a->mode,
                                 b->sha1, b->mode,
@@ -1450,7 +1450,7 @@ static int process_renames(struct merge_options *o,
                                       ren1_dst, branch2);
                                if (o->call_depth) {
                                        struct merge_file_info mfi;
-                                       mfi = merge_file(o, ren1_dst, null_sha1, 0,
+                                       mfi = merge_file_one(o, ren1_dst, null_sha1, 0,
                                                         ren1->pair->two->sha1, ren1->pair->two->mode,
                                                         dst_other.sha1, dst_other.mode,
                                                         branch1, branch2);
@@ -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"))