diff-parseopt: convert --histogram

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index 7899c7cc065d911f85700acaa8e9a6880da73d1c..7432702fd88721366ffa8801720252196bf61f24 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -5151,6 +5151,9 @@ static void prep_parse_options(struct diff_options *options)
                               N_("generate diff using the \"patience diff\" algorithm"),
                               PARSE_OPT_NONEG | PARSE_OPT_NOARG,
                               diff_opt_patience),
+               OPT_BITOP(0, "histogram", &options->xdl_opts,
+                         N_("generate diff using the \"histogram diff\" algorithm"),
+                         XDF_HISTOGRAM_DIFF, XDF_DIFF_ALGORITHM_MASK),
 
                OPT_GROUP(N_("Diff other options")),
                OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5189,9 +5192,7 @@ int diff_opt_parse(struct diff_options *options,
                return ac;
 
        /* xdiff options */
-       if (!strcmp(arg, "--histogram"))
-               options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
-       else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
+       if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
                long value = parse_algorithm_value(optarg);
                if (value < 0)
                        return error("option diff-algorithm accepts \"myers\", "