diff.c: convert -U|--unified

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

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index b94d332f71b0ff58fb12527f8ba13788b8aa6eeb..0711734b125f92d441debeea9849e0f3512790c2 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -36,7 +36,7 @@ endif::git-format-patch[]
 -U<n>::
 --unified=<n>::
        Generate diffs with <n> lines of context instead of
-       the usual three.
+       the usual three. Implies `--patch`.
 ifndef::git-format-patch[]
        Implies `-p`.
 endif::git-format-patch[]

diff --git a/diff.c b/diff.c
index a4a40e4aa8b38e9850fdf7cd3b3801c4bbb01f64..093158244eca22120989bc50facb37bc0e676824 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4867,6 +4867,22 @@ static int parse_objfind_opt(struct diff_options *opt, const char *arg)
        return 1;
 }
 
+static int diff_opt_unified(const struct option *opt,
+                           const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+       char *s;
+
+       BUG_ON_OPT_NEG(unset);
+
+       options->context = strtol(arg, &s, 10);
+       if (*s)
+               return error(_("%s expects a numerical value"), "--unified");
+       enable_patch_output(&options->output_format);
+
+       return 0;
+}
+
 static void prep_parse_options(struct diff_options *options)
 {
        struct option parseopts[] = {
@@ -4877,6 +4893,9 @@ static void prep_parse_options(struct diff_options *options)
                OPT_BITOP('u', NULL, &options->output_format,
                          N_("generate patch"),
                          DIFF_FORMAT_PATCH, DIFF_FORMAT_NO_OUTPUT),
+               OPT_CALLBACK_F('U', "unified", options, N_("<n>"),
+                              N_("generate diffs with <n> lines context"),
+                              PARSE_OPT_NONEG, diff_opt_unified),
                OPT_END()
        };
 
@@ -4905,9 +4924,7 @@ int diff_opt_parse(struct diff_options *options,
                return ac;
 
        /* Output format options */
-       if (opt_arg(arg, 'U', "unified", &options->context))
-               enable_patch_output(&options->output_format);
-       else if (!strcmp(arg, "--raw"))
+       if (!strcmp(arg, "--raw"))
                options->output_format |= DIFF_FORMAT_RAW;
        else if (!strcmp(arg, "--patch-with-raw")) {
                enable_patch_output(&options->output_format);

diff --git a/parse-options.h b/parse-options.h
index ce75278804fcf090d072ed43f952fa7a3c0d63c5..7d83e2971d9afa11b11d6187bd96afb88cbb6118 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -134,6 +134,8 @@ struct option {
 #define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \
                                          (h), PARSE_OPT_NOARG | (f), NULL, (i) }
 #define OPT_BOOL_F(s, l, v, h, f)   OPT_SET_INT_F(s, l, v, h, 1, f)
+#define OPT_CALLBACK_F(s, l, v, a, h, f, cb)                   \
+       { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), (cb) }
 
 #define OPT_END()                   { OPTION_END }
 #define OPT_ARGUMENT(l, h)          { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
@@ -164,8 +166,7 @@ struct option {
 #define OPT_EXPIRY_DATE(s, l, v, h) \
        { OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0,     \
          parse_opt_expiry_date_cb }
-#define OPT_CALLBACK(s, l, v, a, h, f) \
-       { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
+#define OPT_CALLBACK(s, l, v, a, h, f) OPT_CALLBACK_F(s, l, v, a, h, 0, f)
 #define OPT_NUMBER_CALLBACK(v, h, f) \
        { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \
          PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }