diff-parseopt: convert --output-*

This also validates that the user specifies a single character in
--output-indicator-*, not a string.

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 7b81b852cab8aa5601b669c1c54ca8fac920ae55..56b731eae54410cc000d2ed99573ed482ac4bfb6 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -41,6 +41,16 @@ ifndef::git-format-patch[]
        Implies `-p`.
 endif::git-format-patch[]
 
+--output=<file>::
+       Output to a specific file instead of stdout.
+
+--output-indicator-new=<char>::
+--output-indicator-old=<char>::
+--output-indicator-context=<char>::
+       Specify the character used to indicate new, old or context
+       lines in the generated patch. Normally they are '+', '-' and
+       ' ' respectively.
+
 ifndef::git-format-patch[]
 --raw::
 ifndef::git-log[]

diff --git a/diff.c b/diff.c
index b24f6825a1327595d144592ba375c386a53216c5..8df396cb9a36d82e7dfd311b30c9f555a724c8ea 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4841,6 +4841,19 @@ static int parse_objfind_opt(struct diff_options *opt, const char *arg)
        return 1;
 }
 
+static int diff_opt_char(const struct option *opt,
+                        const char *arg, int unset)
+{
+       char *value = opt->value;
+
+       BUG_ON_OPT_NEG(unset);
+       if (arg[1])
+               return error(_("%s expects a character, got '%s'"),
+                            opt->long_name, arg);
+       *value = arg[0];
+       return 0;
+}
+
 static int diff_opt_compact_summary(const struct option *opt,
                                    const char *arg, int unset)
 {
@@ -4872,6 +4885,23 @@ static int diff_opt_dirstat(const struct option *opt,
        return 0;
 }
 
+static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
+                                            const struct option *opt,
+                                            const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+       char *path;
+
+       BUG_ON_OPT_NEG(unset);
+       path = prefix_filename(ctx->prefix, arg);
+       options->file = xfopen(path, "w");
+       options->close_file = 1;
+       if (options->use_color != GIT_COLOR_ALWAYS)
+               options->use_color = GIT_COLOR_NEVER;
+       free(path);
+       return 0;
+}
+
 static int diff_opt_unified(const struct option *opt,
                            const char *arg, int unset)
 {
@@ -4965,6 +4995,27 @@ static void prep_parse_options(struct diff_options *options)
                OPT_CALLBACK_F(0, "compact-summary", options, NULL,
                               N_("generate compact summary in diffstat"),
                               PARSE_OPT_NOARG, diff_opt_compact_summary),
+               OPT_CALLBACK_F(0, "output-indicator-new",
+                              &options->output_indicators[OUTPUT_INDICATOR_NEW],
+                              N_("<char>"),
+                              N_("specify the character to indicate a new line instead of '+'"),
+                              PARSE_OPT_NONEG, diff_opt_char),
+               OPT_CALLBACK_F(0, "output-indicator-old",
+                              &options->output_indicators[OUTPUT_INDICATOR_OLD],
+                              N_("<char>"),
+                              N_("specify the character to indicate an old line instead of '-'"),
+                              PARSE_OPT_NONEG, diff_opt_char),
+               OPT_CALLBACK_F(0, "output-indicator-context",
+                              &options->output_indicators[OUTPUT_INDICATOR_CONTEXT],
+                              N_("<char>"),
+                              N_("specify the character to indicate a context instead of ' '"),
+                              PARSE_OPT_NONEG, diff_opt_char),
+
+               OPT_GROUP(N_("Diff other options")),
+               { OPTION_CALLBACK, 0, "output", options, N_("<file>"),
+                 N_("Output to a specific file"),
+                 PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
+
                OPT_END()
        };
 
@@ -4992,16 +5043,8 @@ int diff_opt_parse(struct diff_options *options,
        if (ac)
                return ac;
 
-       /* Output format options */
-       if (skip_prefix(arg, "--output-indicator-new=", &arg))
-               options->output_indicators[OUTPUT_INDICATOR_NEW] = arg[0];
-       else if (skip_prefix(arg, "--output-indicator-old=", &arg))
-               options->output_indicators[OUTPUT_INDICATOR_OLD] = arg[0];
-       else if (skip_prefix(arg, "--output-indicator-context=", &arg))
-               options->output_indicators[OUTPUT_INDICATOR_CONTEXT] = arg[0];
-
        /* renames options */
-       else if (starts_with(arg, "-B") ||
+       if (starts_with(arg, "-B") ||
                 skip_to_optional_arg(arg, "--break-rewrites", NULL)) {
                if ((options->break_opt = diff_scoreopt_parse(arg)) == -1)
                        return error("invalid argument to -B: %s", arg+2);
@@ -5242,15 +5285,7 @@ int diff_opt_parse(struct diff_options *options,
        else if (opt_arg(arg, '\0', "inter-hunk-context",
                         &options->interhunkcontext))
                ;
-       else if ((argcount = parse_long_opt("output", av, &optarg))) {
-               char *path = prefix_filename(prefix, optarg);
-               options->file = xfopen(path, "w");
-               options->close_file = 1;
-               if (options->use_color != GIT_COLOR_ALWAYS)
-                       options->use_color = GIT_COLOR_NEVER;
-               free(path);
-               return argcount;
-       } else
+       else
                return 0;
        return 1;
 }