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parse-options: allow ll_callback with OPTION_CALLBACK 

OPTION_CALLBACK is much simpler/safer to use, but parse_opt_cb does
not allow access to parse_opt_ctx_t, which sometimes is useful
(e.g. to obtain the prefix).

Extending parse_opt_cb to take parse_opt_cb could result in a lot of
changes. Instead let's just allow ll_callback to be used with
OPTION_CALLBACK. The user will have to be careful, not to change
anything in ctx, or return wrong result code. But that's the price for
ll_callback.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2019-01-27 07:35:28 +07:00 коммит произвёл Junio C Hamano
Родитель f41179f16b
Коммит 3ebbe28989
5 изменённых файлов: 52 добавлений и 23 удалений
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2
builtin/merge.c
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@ -114,11 +114,13 @@ static int option_parse_message(const struct option *opt,
static enum parse_opt_result option_read_message(struct parse_opt_ctx_t *ctx,
const struct option *opt,
const char *arg_not_used,
int unset)
{
struct strbuf *buf = opt->value;
const char *arg;
BUG_ON_OPT_ARG(arg_not_used);
if (unset)
BUG("-F cannot be negated");

20
builtin/update-index.c
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@ -848,13 +848,15 @@ static int parse_new_style_cacheinfo(const char *arg,
}
static enum parse_opt_result cacheinfo_callback(
struct parse_opt_ctx_t *ctx, const struct option *opt, int unset)
struct parse_opt_ctx_t *ctx, const struct option *opt,
const char *arg, int unset)
{
struct object_id oid;
unsigned int mode;
const char *path;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
if (!parse_new_style_cacheinfo(ctx->argv[1], &mode, &oid, &path)) {
if (add_cacheinfo(mode, &oid, path, 0))
@ -874,11 +876,13 @@ static enum parse_opt_result cacheinfo_callback(
}
static enum parse_opt_result stdin_cacheinfo_callback(
struct parse_opt_ctx_t *ctx, const struct option *opt, int unset)
struct parse_opt_ctx_t *ctx, const struct option *opt,
const char *arg, int unset)
{
int *nul_term_line = opt->value;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
if (ctx->argc != 1)
return error("option '%s' must be the last argument", opt->long_name);
@ -888,11 +892,13 @@ static enum parse_opt_result stdin_cacheinfo_callback(
}
static enum parse_opt_result stdin_callback(
struct parse_opt_ctx_t *ctx, const struct option *opt, int unset)
struct parse_opt_ctx_t *ctx, const struct option *opt,
const char *arg, int unset)
{
int *read_from_stdin = opt->value;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
if (ctx->argc != 1)
return error("option '%s' must be the last argument", opt->long_name);
@ -901,12 +907,14 @@ static enum parse_opt_result stdin_callback(
}
static enum parse_opt_result unresolve_callback(
struct parse_opt_ctx_t *ctx, const struct option *opt, int unset)
struct parse_opt_ctx_t *ctx, const struct option *opt,
const char *arg, int unset)
{
int *has_errors = opt->value;
const char *prefix = startup_info->prefix;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
/* consume remaining arguments. */
*has_errors = do_unresolve(ctx->argc, ctx->argv,
@ -920,12 +928,14 @@ static enum parse_opt_result unresolve_callback(
}
static enum parse_opt_result reupdate_callback(
struct parse_opt_ctx_t *ctx, const struct option *opt, int unset)
struct parse_opt_ctx_t *ctx, const struct option *opt,
const char *arg, int unset)
{
int *has_errors = opt->value;
const char *prefix = startup_info->prefix;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
/* consume remaining arguments. */
setup_work_tree();

4
parse-options-cb.c
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@ -171,8 +171,10 @@ int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
* parse_options().
*/
enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
const struct option *opt, int unset)
const struct option *opt,
const char *arg, int unset)
{
BUG_ON_OPT_ARG(arg);
return PARSE_OPT_UNKNOWN;
}

44
parse-options.c
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@ -95,7 +95,7 @@ static enum parse_opt_result get_value(struct parse_opt_ctx_t *p,
switch (opt->type) {
case OPTION_LOWLEVEL_CALLBACK:
return opt->ll_callback(p, opt, unset);
return opt->ll_callback(p, opt, NULL, unset);
case OPTION_BIT:
if (unset)
@ -161,16 +161,27 @@ static enum parse_opt_result get_value(struct parse_opt_ctx_t *p,
return err;
case OPTION_CALLBACK:
if (unset)
return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
if (opt->flags & PARSE_OPT_NOARG)
return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
if (get_arg(p, opt, flags, &arg))
return -1;
return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
{
const char *p_arg = NULL;
int p_unset;
if (unset)
p_unset = 1;
else if (opt->flags & PARSE_OPT_NOARG)
p_unset = 0;
else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
p_unset = 0;
else if (get_arg(p, opt, flags, &arg))
return -1;
else {
p_unset = 0;
p_arg = arg;
}
if (opt->callback)
return (*opt->callback)(opt, p_arg, p_unset) ? (-1) : 0;
else
return (*opt->ll_callback)(p, opt, p_arg, p_unset);
}
case OPTION_INTEGER:
if (unset) {
*(int *)opt->value = 0;
@ -238,7 +249,10 @@ static enum parse_opt_result parse_short_opt(struct parse_opt_ctx_t *p,
len++;
arg = xmemdupz(p->opt, len);
p->opt = p->opt[len] ? p->opt + len : NULL;
rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
if (numopt->callback)
rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
else
rc = (*numopt->ll_callback)(p, numopt, arg, 0);
free(arg);
return rc;
}
@ -414,10 +428,10 @@ static void parse_options_check(const struct option *opts)
err |= optbug(opts, "should not accept an argument");
break;
case OPTION_CALLBACK:
if (!opts->callback)
BUG("OPTION_CALLBACK needs a callback");
if (opts->ll_callback)
BUG("OPTION_CALLBACK needs no ll_callback");
if (!opts->callback && !opts->ll_callback)
BUG("OPTION_CALLBACK needs one callback");
if (opts->callback && opts->ll_callback)
BUG("OPTION_CALLBACK can't have two callbacks");
break;
case OPTION_LOWLEVEL_CALLBACK:
if (!opts->ll_callback)

5
parse-options.h
Просмотреть файл

@ -50,7 +50,8 @@ typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
struct parse_opt_ctx_t;
typedef enum parse_opt_result parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
const struct option *opt, int unset);
const struct option *opt,
const char *arg, int unset);
/*
* `type`::
@ -267,7 +268,7 @@ int parse_opt_commits(const struct option *, const char *, int);
int parse_opt_tertiary(const struct option *, const char *, int);
int parse_opt_string_list(const struct option *, const char *, int);
int parse_opt_noop_cb(const struct option *, const char *, int);
int parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx, const struct option *, int);
int parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx, const struct option *, const char *, int);
int parse_opt_passthru(const struct option *, const char *, int);
int parse_opt_passthru_argv(const struct option *, const char *, int);