Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> writes:
> There are a few issues with opterror()
>
> - it tries to assemble an English sentence from pieces. This is not
> great for translators because we give them pieces instead of a full
> sentence.
>
> - It's a wrapper around error() and needs some hack to let the
> compiler know it always returns -1.
>
> - Since it takes a string instead of printf format, one call site has
> to assemble the string manually before passing to it.
>
> Kill it and produce the option name with optname(). The user will use
> error() directly. This solves the second and third problems.
The proposed log message is not very friendly to reviewers, as there
is no hint what optname() does nor where it came from; it turns out
that this patch introduces it.
Introduce optname() that does the early half of original
opterror() to come up with the name of the option reported back
to the user, and use it to kill opterror(). The callers of
opterror() now directly call error() using the string returned
by opterror() instead.
or something like that perhaps.
Theoretically not very friendly to topics in flight, but I do not
expect there would be any right now that wants to add new callers of
opterror().
I do agree with the reasoning behind this change. Thanks for
working on it.
>
> It kind helps the first problem as well because "%s does foo" does
> give a translator a full sentence in a sense and let them reorder if
> needed. But it has limitations, if the subject part has to change
> based on the rest of the sentence, that language is screwed. This is
> also why I try to avoid calling optname() when 'flags' is known in
> advance.
>
> Mark of these strings for translation as well while at there.
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
> ---
> builtin/merge.c | 2 +-
> builtin/revert.c | 3 ++-
> parse-options-cb.c | 7 ++++---
> parse-options.c | 46 +++++++++++++++++++++++++--------------------
> parse-options.h | 5 +----
> ref-filter.c | 8 +++++---
> t/t4211-line-log.sh | 2 +-
> 7 files changed, 40 insertions(+), 33 deletions(-)
>
> diff --git a/builtin/merge.c b/builtin/merge.c
> index 92ba7e1c6d..82248d43c3 100644
> --- a/builtin/merge.c
> +++ b/builtin/merge.c
> @@ -128,7 +128,7 @@ static int option_read_message(struct parse_opt_ctx_t *ctx,
> ctx->argc--;
> arg = *++ctx->argv;
> } else
> - return opterror(opt, "requires a value", 0);
> + return error(_("option `%s' requires a value"), opt->long_name);
>
> if (buf->len)
> strbuf_addch(buf, '\n');
> diff --git a/builtin/revert.c b/builtin/revert.c
> index c93393c89b..11190d2ab4 100644
> --- a/builtin/revert.c
> +++ b/builtin/revert.c
> @@ -69,7 +69,8 @@ static int option_parse_m(const struct option *opt,
>
> replay->mainline = strtol(arg, &end, 10);
> if (*end || replay->mainline <= 0)
> - return opterror(opt, "expects a number greater than zero", 0);
> + return error(_("option `%s' expects a number greater than zero"),
> + opt->long_name);
>
> return 0;
> }
> diff --git a/parse-options-cb.c b/parse-options-cb.c
> index e8236534ac..813eb6301b 100644
> --- a/parse-options-cb.c
> +++ b/parse-options-cb.c
> @@ -18,7 +18,8 @@ int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
> } else {
> v = strtol(arg, (char **)&arg, 10);
> if (*arg)
> - return opterror(opt, "expects a numerical value", 0);
> + return error(_("option `%s' expects a numerical value"),
> + opt->long_name);
> if (v && v < MINIMUM_ABBREV)
> v = MINIMUM_ABBREV;
> else if (v > 40)
> @@ -54,8 +55,8 @@ int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
> arg = unset ? "never" : (const char *)opt->defval;
> value = git_config_colorbool(NULL, arg);
> if (value < 0)
> - return opterror(opt,
> - "expects \"always\", \"auto\", or \"never\"", 0);
> + return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
> + opt->long_name);
> *(int *)opt->value = value;
> return 0;
> }
> diff --git a/parse-options.c b/parse-options.c
> index 3b874a83a0..0bf817193d 100644
> --- a/parse-options.c
> +++ b/parse-options.c
> @@ -32,7 +32,7 @@ static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
> p->argc--;
> *arg = *++p->argv;
> } else
> - return opterror(opt, "requires a value", flags);
> + return error(_("%s requires a value"), optname(opt, flags));
> return 0;
> }
>
> @@ -49,7 +49,6 @@ static int opt_command_mode_error(const struct option *opt,
> int flags)
> {
> const struct option *that;
> - struct strbuf message = STRBUF_INIT;
> struct strbuf that_name = STRBUF_INIT;
>
> /*
> @@ -67,13 +66,13 @@ static int opt_command_mode_error(const struct option *opt,
> strbuf_addf(&that_name, "--%s", that->long_name);
> else
> strbuf_addf(&that_name, "-%c", that->short_name);
> - strbuf_addf(&message, ": incompatible with %s", that_name.buf);
> + error(_("%s is incompatible with %s"),
> + optname(opt, flags), that_name.buf);
> strbuf_release(&that_name);
> - opterror(opt, message.buf, flags);
> - strbuf_release(&message);
> return -1;
> }
> - return opterror(opt, ": incompatible with something else", flags);
> + return error(_("%s : incompatible with something else"),
> + optname(opt, flags));
> }
>
> static int get_value(struct parse_opt_ctx_t *p,
> @@ -86,11 +85,11 @@ static int get_value(struct parse_opt_ctx_t *p,
> int err;
>
> if (unset && p->opt)
> - return opterror(opt, "takes no value", flags);
> + return error(_("%s takes no value"), optname(opt, flags));
> if (unset && (opt->flags & PARSE_OPT_NONEG))
> - return opterror(opt, "isn't available", flags);
> + return error(_("%s isn't available"), optname(opt, flags));
> if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
> - return opterror(opt, "takes no value", flags);
> + return error(_("%s takes no value"), optname(opt, flags));
>
> switch (opt->type) {
> case OPTION_LOWLEVEL_CALLBACK:
> @@ -176,7 +175,8 @@ static int get_value(struct parse_opt_ctx_t *p,
> return -1;
> *(int *)opt->value = strtol(arg, (char **)&s, 10);
> if (*s)
> - return opterror(opt, "expects a numerical value", flags);
> + return error(_("%s expects a numerical value"),
> + optname(opt, flags));
> return 0;
>
> case OPTION_MAGNITUDE:
> @@ -191,9 +191,9 @@ static int get_value(struct parse_opt_ctx_t *p,
> if (get_arg(p, opt, flags, &arg))
> return -1;
> if (!git_parse_ulong(arg, opt->value))
> - return opterror(opt,
> - "expects a non-negative integer value with an optional k/m/g suffix",
> - flags);
> + return error(_("%s expects a non-negative integer value"
> + " with an optional k/m/g suffix"),
> + optname(opt, flags));
> return 0;
>
> default:
> @@ -257,7 +257,8 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
> if (!rest)
> continue;
> if (*rest == '=')
> - return opterror(options, "takes no value", flags);
> + return error(_("%s takes no value"),
> + optname(options, flags));
> if (*rest)
> continue;
> p->out[p->cpidx++] = arg - 2;
> @@ -773,12 +774,17 @@ void NORETURN usage_msg_opt(const char *msg,
> usage_with_options(usagestr, options);
> }
>
> -#undef opterror
> -int opterror(const struct option *opt, const char *reason, int flags)
> +const char *optname(const struct option *opt, int flags)
> {
> + static struct strbuf sb = STRBUF_INIT;
> +
> + strbuf_reset(&sb);
> if (flags & OPT_SHORT)
> - return error("switch `%c' %s", opt->short_name, reason);
> - if (flags & OPT_UNSET)
> - return error("option `no-%s' %s", opt->long_name, reason);
> - return error("option `%s' %s", opt->long_name, reason);
> + strbuf_addf(&sb, "switch `%c'", opt->short_name);
> + else if (flags & OPT_UNSET)
> + strbuf_addf(&sb, "option `no-%s'", opt->long_name);
> + else
> + strbuf_addf(&sb, "option `%s'", opt->long_name);
> +
> + return sb.buf;
> }
> diff --git a/parse-options.h b/parse-options.h
> index dd14911a29..2e146aa6fa 100644
> --- a/parse-options.h
> +++ b/parse-options.h
> @@ -189,10 +189,7 @@ extern NORETURN void usage_msg_opt(const char *msg,
> const struct option *options);
>
> extern int optbug(const struct option *opt, const char *reason);
> -extern int opterror(const struct option *opt, const char *reason, int flags);
> -#if defined(__GNUC__)
> -#define opterror(o,r,f) (opterror((o),(r),(f)), const_error())
> -#endif
> +const char *optname(const struct option *opt, int flags);
>
> /*----- incremental advanced APIs -----*/
>
> diff --git a/ref-filter.c b/ref-filter.c
> index 2a05619211..0681359100 100644
> --- a/ref-filter.c
> +++ b/ref-filter.c
> @@ -2302,9 +2302,11 @@ int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
>
> if (rf->merge) {
> if (no_merged) {
> - return opterror(opt, "is incompatible with --merged", 0);
> + return error(_("option `%s' is incompatible with --merged"),
> + opt->long_name);
> } else {
> - return opterror(opt, "is incompatible with --no-merged", 0);
> + return error(_("option `%s' is incompatible with --no-merged"),
> + opt->long_name);
> }
> }
>
> @@ -2318,7 +2320,7 @@ int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
> rf->merge_commit = lookup_commit_reference_gently(the_repository,
> &oid, 0);
> if (!rf->merge_commit)
> - return opterror(opt, "must point to a commit", 0);
> + return error(_("option `%s' must point to a commit"), opt->long_name);
>
> return 0;
> }
> diff --git a/t/t4211-line-log.sh b/t/t4211-line-log.sh
> index ef1322148e..bd5fe4d148 100755
> --- a/t/t4211-line-log.sh
> +++ b/t/t4211-line-log.sh
> @@ -25,7 +25,7 @@ canned_test_failure () {
> test_bad_opts () {
> test_expect_success "invalid args: $1" "
> test_must_fail git log $1 2>errors &&
> - grep '$2' errors
> + test_i18ngrep '$2' errors
> "
> }
