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pretty.c: capture invalid trailer argument

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As we would like to use this trailers logic in the ref-filter, it's
nice to get an invalid trailer argument. This will allow us to print
precise error message while using `format_set_trailers_options()` in
ref-filter.

For capturing the invalid argument, we changed the working of
`format_set_trailers_options()` a little bit.
Original logic does "break" and fell through in mainly 2 cases -
    1. unknown/invalid argument
    2. end of the arg string

But now instead of "break", we capture invalid argument and return
non-zero. And non-zero is handled by the caller.
(We prepared the caller to handle non-zero in the previous commit).

Capturing invalid arguments this way will also affects the working
of current logic. As at the end of the arg string it will return non-zero.
So in order to make things correct, introduced an additional conditional
statement i.e if encounter ")", do 'break'.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Heba Waly <heba.waly@gmail.com>
Signed-off-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Hariom Verma 2021-02-13 01:52:42 +00:00 committed by Junio C Hamano
parent 90563aedca
commit 636a0aeedf
2 changed files with 15 additions and 5 deletions
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17
pretty.c
View File

@ -1152,12 +1152,16 @@ int format_set_trailers_options(struct process_trailer_options *opts,
struct string_list *filter_list,
struct strbuf *sepbuf,
struct strbuf *kvsepbuf,
const char **arg)
const char **arg,
char **invalid_arg)
{
for (;;) {
const char *argval;
size_t arglen;
if (**arg == ')')
break;
if (match_placeholder_arg_value(*arg, "key", arg, &argval, &arglen)) {
uintptr_t len = arglen;
@ -1190,8 +1194,13 @@ int format_set_trailers_options(struct process_trailer_options *opts,
} else if (!match_placeholder_bool_arg(*arg, "only", arg, &opts->only_trailers) &&
!match_placeholder_bool_arg(*arg, "unfold", arg, &opts->unfold) &&
!match_placeholder_bool_arg(*arg, "keyonly", arg, &opts->key_only) &&
!match_placeholder_bool_arg(*arg, "valueonly", arg, &opts->value_only))
break;
!match_placeholder_bool_arg(*arg, "valueonly", arg, &opts->value_only)) {
if (invalid_arg) {
size_t len = strcspn(*arg, ",)");
*invalid_arg = xstrndup(*arg, len);
}
return -1;
}
}
return 0;
}
@ -1473,7 +1482,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
if (*arg == ':') {
arg++;
if (format_set_trailers_options(&opts, &filter_list, &sepbuf, &kvsepbuf, &arg))
if (format_set_trailers_options(&opts, &filter_list, &sepbuf, &kvsepbuf, &arg, NULL))
goto trailer_out;
}
if (*arg == ')') {

3
pretty.h
View File

@ -151,6 +151,7 @@ int format_set_trailers_options(struct process_trailer_options *opts,
struct string_list *filter_list,
struct strbuf *sepbuf,
struct strbuf *kvsepbuf,
const char **arg);
const char **arg,
char **invalid_arg);
#endif /* PRETTY_H */