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parse-options: only insert newline in help text if needed

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Currently, when parse_options() produces a help message it always emits
a blank line after the usage text to separate it from the options text.
If the option spec does not define any switches, or only defines hidden
switches that will not be displayed, then the help text will end up with
two trailing blank lines instead of one.  Let's defer emitting the blank
line between the usage text and the options text until it is clear that
the options section will not be empty.

Fixes t1502.5, t1502.6.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Casey 2017-09-24 21:08:05 -07:00 committed by Junio C Hamano
parent 1a9bf1e176
commit a6304fa4c2
2 changed files with 10 additions and 4 deletions
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10
parse-options.c
View File

@ -581,6 +581,7 @@ static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
const struct option *opts, int full, int err)
{
FILE *outfile = err ? stderr : stdout;
int need_newline;
if (!usagestr)
return PARSE_OPT_HELP;
@ -603,8 +604,7 @@ static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
usagestr++;
}
if (opts->type != OPTION_GROUP)
fputc('\n', outfile);
need_newline = 1;
for (; opts->type != OPTION_END; opts++) {
size_t pos;
@ -612,6 +612,7 @@ static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
if (opts->type == OPTION_GROUP) {
fputc('\n', outfile);
need_newline = 0;
if (*opts->help)
fprintf(outfile, "%s\n", _(opts->help));
continue;
@ -619,6 +620,11 @@ static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
continue;
if (need_newline) {
fputc('\n', outfile);
need_newline = 0;
}
pos = fprintf(outfile, " ");
if (opts->short_name) {
if (opts->flags & PARSE_OPT_NODASH)

4
t/t1502-rev-parse-parseopt.sh
View File

@ -98,7 +98,7 @@ END_EXPECT
test_i18ncmp expect output
'
test_expect_failure 'test --parseopt help output no switches' '
test_expect_success 'test --parseopt help output no switches' '
sed -e "s/^|//" >expect <<\END_EXPECT &&
|cat <<\EOF
|usage: some-command [options] <args>...
@ -111,7 +111,7 @@ END_EXPECT
test_i18ncmp expect output
'
test_expect_failure 'test --parseopt help output hidden switches' '
test_expect_success 'test --parseopt help output hidden switches' '
sed -e "s/^|//" >expect <<\END_EXPECT &&
|cat <<\EOF
|usage: some-command [options] <args>...