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parse-opt: optionally show "--no-" option string

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It is usually better to have positive options, to avoid confusing double
negations.  However, sometimes it is desirable to show the negative option
in the help.

Introduce the flag PARSE_OPT_NEGHELP to do that.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2009-07-27 20:49:56 +02:00
committed by Junio C Hamano
parent e658002005
commit 86b5efb286
2 changed files with 8 additions and 2 deletions
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6
parse-options.c
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@ -511,7 +511,7 @@ static int usage_with_options_internal(const char * const *usagestr,
continue;
pos = fprintf(stderr, " ");
if (opts->short_name) {
if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
if (opts->flags & PARSE_OPT_NODASH)
pos += fprintf(stderr, "%c", opts->short_name);
else
@ -520,7 +520,9 @@ static int usage_with_options_internal(const char * const *usagestr,
if (opts->long_name && opts->short_name)
pos += fprintf(stderr, ", ");
if (opts->long_name)
pos += fprintf(stderr, "--%s", opts->long_name);
pos += fprintf(stderr, "--%s%s",
(opts->flags & PARSE_OPT_NEGHELP) ? "no-" : "",
opts->long_name);
if (opts->type == OPTION_NUMBER)
pos += fprintf(stderr, "-NUM");