diff-merges: implement new values for --diff-merges

We first implement new options as exact synonyms for their original
counterparts, to get all the infrastructure right, and keep functional
improvements for later commits.

The following values are implemented:

--diff-merges=	        old equivalent
first|first-parent    = --first-parent (only format implications)
sep|separate          = -m
comb|combined         = -c
dense| dense-combined = --cc

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff-merges.c b/diff-merges.c
index e3c0190ebd95fa034e9858d0f8d9841cae5f3a0a..4d22da1795777916746e4d792d37968c8caf37ec 100644 (file)
--- a/diff-merges.c
+++ b/diff-merges.c
@@ -17,6 +17,12 @@ static void set_separate(struct rev_info *revs)
        revs->separate_merges = 1;
 }
 
+static void set_first_parent(struct rev_info *revs)
+{
+       set_separate(revs);
+       revs->first_parent_merges = 1;
+}
+
 static void set_m(struct rev_info *revs)
 {
        /*
@@ -44,11 +50,18 @@ static void set_dense_combined(struct rev_info *revs)
 
 static void set_diff_merges(struct rev_info *revs, const char *optarg)
 {
-       if (!strcmp(optarg, "off")) {
+       if (!strcmp(optarg, "off") || !strcmp(optarg, "none"))
                suppress(revs);
-       } else {
+       else if (!strcmp(optarg, "first-parent"))
+               set_first_parent(revs);
+       else if (!strcmp(optarg, "separate"))
+               set_separate(revs);
+       else if (!strcmp(optarg, "combined"))
+               set_combined(revs);
+       else if (!strcmp(optarg, "dense-combined"))
+               set_dense_combined(revs);
+       else
                die(_("unknown value for --diff-merges: %s"), optarg);
-       }
 }
 
 /*