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parse-options.c
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#include "git-compat-util.h"
#include "parse-options.h"
#include "abspath.h"
#include "parse.h"
#include "gettext.h"
#include "strbuf.h"
#include "string-list.h"
#include "utf8.h"
static int disallow_abbreviated_options;
enum opt_parsed {
OPT_LONG = 0,
OPT_SHORT = 1<<0,
OPT_UNSET = 1<<1,
};
static void optbug(const struct option *opt, const char *reason)
{
if (opt->long_name && opt->short_name)
bug("switch '%c' (--%s) %s", opt->short_name,
opt->long_name, reason);
else if (opt->long_name)
bug("option '%s' %s", opt->long_name, reason);
else
bug("switch '%c' %s", opt->short_name, reason);
}
static const char *optname(const struct option *opt, enum opt_parsed flags)
{
static struct strbuf sb = STRBUF_INIT;
strbuf_reset(&sb);
if (flags & OPT_SHORT)
strbuf_addf(&sb, "switch `%c'", opt->short_name);
else if (flags & OPT_UNSET)
strbuf_addf(&sb, "option `no-%s'", opt->long_name);
else if (flags == OPT_LONG)
strbuf_addf(&sb, "option `%s'", opt->long_name);
else
BUG("optname() got unknown flags %d", flags);
return sb.buf;
}
static enum parse_opt_result get_arg(struct parse_opt_ctx_t *p,
const struct option *opt,
enum opt_parsed flags, const char **arg)
{
if (p->opt) {
*arg = p->opt;
p->opt = NULL;
} else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
*arg = (const char *)opt->defval;
} else if (p->argc > 1) {
p->argc--;
*arg = *++p->argv;
} else
return error(_("%s requires a value"), optname(opt, flags));
return 0;
}
static char *fix_filename(const char *prefix, const char *file)
{
if (!file || !*file)
return NULL;
else
return prefix_filename_except_for_dash(prefix, file);
}
static enum parse_opt_result do_get_value(struct parse_opt_ctx_t *p,
const struct option *opt,
enum opt_parsed flags,
const char **argp)
{
const char *s, *arg;
const int unset = flags & OPT_UNSET;
int err;
if (unset && p->opt)
return error(_("%s takes no value"), optname(opt, flags));
if (unset && (opt->flags & PARSE_OPT_NONEG))
return error(_("%s isn't available"), optname(opt, flags));
if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
return error(_("%s takes no value"), optname(opt, flags));
switch (opt->type) {
case OPTION_LOWLEVEL_CALLBACK:
return opt->ll_callback(p, opt, NULL, unset);
case OPTION_BIT:
if (unset)
*(int *)opt->value &= ~opt->defval;
else
*(int *)opt->value |= opt->defval;
return 0;
case OPTION_NEGBIT:
if (unset)
*(int *)opt->value |= opt->defval;
else
*(int *)opt->value &= ~opt->defval;
return 0;
case OPTION_BITOP:
if (unset)
BUG("BITOP can't have unset form");
*(int *)opt->value &= ~opt->extra;
*(int *)opt->value |= opt->defval;
return 0;
case OPTION_COUNTUP:
if (*(int *)opt->value < 0)
*(int *)opt->value = 0;
*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
return 0;
case OPTION_SET_INT:
*(int *)opt->value = unset ? 0 : opt->defval;
return 0;
case OPTION_STRING:
if (unset)
*(const char **)opt->value = NULL;
else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
*(const char **)opt->value = (const char *)opt->defval;
else
return get_arg(p, opt, flags, (const char **)opt->value);
return 0;
case OPTION_FILENAME:
{
const char *value;
FREE_AND_NULL(*(char **)opt->value);
err = 0;
if (unset)
value = NULL;
else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
value = (const char *) opt->defval;
else
err = get_arg(p, opt, flags, &value);
if (!err)
*(char **)opt->value = fix_filename(p->prefix, value);
return err;
}
case OPTION_CALLBACK:
{
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->flags & PARSE_OPT_CMDMODE)
*argp = p_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;
return 0;
}
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
*(int *)opt->value = opt->defval;
return 0;
}
if (get_arg(p, opt, flags, &arg))
return -1;
if (!*arg)
return error(_("%s expects a numerical value"),
optname(opt, flags));
*(int *)opt->value = strtol(arg, (char **)&s, 10);
if (*s)
return error(_("%s expects a numerical value"),
optname(opt, flags));
return 0;
case OPTION_MAGNITUDE:
if (unset) {
*(unsigned long *)opt->value = 0;
return 0;
}
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
*(unsigned long *)opt->value = opt->defval;
return 0;
}
if (get_arg(p, opt, flags, &arg))
return -1;
if (!git_parse_ulong(arg, opt->value))
return error(_("%s expects a non-negative integer value"
" with an optional k/m/g suffix"),
optname(opt, flags));
return 0;
default:
BUG("opt->type %d should not happen", opt->type);
}
}
struct parse_opt_cmdmode_list {
int value, *value_ptr;
const struct option *opt;
const char *arg;
enum opt_parsed flags;
struct parse_opt_cmdmode_list *next;
};
static void build_cmdmode_list(struct parse_opt_ctx_t *ctx,
const struct option *opts)
{
ctx->cmdmode_list = NULL;
for (; opts->type != OPTION_END; opts++) {
struct parse_opt_cmdmode_list *elem = ctx->cmdmode_list;
int *value_ptr = opts->value;
if (!(opts->flags & PARSE_OPT_CMDMODE) || !value_ptr)
continue;
while (elem && elem->value_ptr != value_ptr)
elem = elem->next;
if (elem)
continue;
CALLOC_ARRAY(elem, 1);
elem->value_ptr = value_ptr;
elem->value = *value_ptr;
elem->next = ctx->cmdmode_list;
ctx->cmdmode_list = elem;
}
}
static char *optnamearg(const struct option *opt, const char *arg,
enum opt_parsed flags)
{
if (flags & OPT_SHORT)
return xstrfmt("-%c%s", opt->short_name, arg ? arg : "");
return xstrfmt("--%s%s%s%s", flags & OPT_UNSET ? "no-" : "",
opt->long_name, arg ? "=" : "", arg ? arg : "");
}
static enum parse_opt_result get_value(struct parse_opt_ctx_t *p,
const struct option *opt,
enum opt_parsed flags)
{
const char *arg = NULL;
enum parse_opt_result result = do_get_value(p, opt, flags, &arg);
struct parse_opt_cmdmode_list *elem = p->cmdmode_list;
char *opt_name, *other_opt_name;
for (; elem; elem = elem->next) {
if (*elem->value_ptr == elem->value)
continue;
if (elem->opt &&
(elem->opt->flags | opt->flags) & PARSE_OPT_CMDMODE)
break;
elem->opt = opt;
elem->arg = arg;
elem->flags = flags;
elem->value = *elem->value_ptr;
}
if (result || !elem)
return result;
opt_name = optnamearg(opt, arg, flags);
other_opt_name = optnamearg(elem->opt, elem->arg, elem->flags);
error(_("options '%s' and '%s' cannot be used together"),
opt_name, other_opt_name);
free(opt_name);
free(other_opt_name);
return -1;
}
static enum parse_opt_result parse_short_opt(struct parse_opt_ctx_t *p,
const struct option *options)
{
const struct option *numopt = NULL;
for (; options->type != OPTION_END; options++) {
if (options->short_name == *p->opt) {
p->opt = p->opt[1] ? p->opt + 1 : NULL;
return get_value(p, options, OPT_SHORT);
}
/*
* Handle the numerical option later, explicit one-digit
* options take precedence over it.
*/
if (options->type == OPTION_NUMBER)
numopt = options;
}
if (numopt && isdigit(*p->opt)) {
size_t len = 1;
char *arg;
int rc;
while (isdigit(p->opt[len]))
len++;
arg = xmemdupz(p->opt, len);
p->opt = p->opt[len] ? p->opt + len : NULL;
if (numopt->callback)
rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
else
rc = (*numopt->ll_callback)(p, numopt, arg, 0);
free(arg);
return rc;
}
return PARSE_OPT_UNKNOWN;
}
static int has_string(const char *it, const char **array)
{
while (*array)
if (!strcmp(it, *(array++)))
return 1;
return 0;
}
static int is_alias(struct parse_opt_ctx_t *ctx,
const struct option *one_opt,
const struct option *another_opt)
{
const char **group;
if (!ctx->alias_groups)
return 0;
if (!one_opt->long_name || !another_opt->long_name)
return 0;
for (group = ctx->alias_groups; *group; group += 3) {
/* it and other are from the same family? */
if (has_string(one_opt->long_name, group) &&
has_string(another_opt->long_name, group))
return 1;
}
return 0;
}
struct parsed_option {
const struct option *option;
enum opt_parsed flags;
};
static void register_abbrev(struct parse_opt_ctx_t *p,
const struct option *option, enum opt_parsed flags,
struct parsed_option *abbrev,
struct parsed_option *ambiguous)
{
if (p->flags & PARSE_OPT_KEEP_UNKNOWN_OPT)
return;
if (abbrev->option &&
!(abbrev->flags == flags && is_alias(p, abbrev->option, option))) {
/*
* If this is abbreviated, it is
* ambiguous. So when there is no
* exact match later, we need to
* error out.
*/
ambiguous->option = abbrev->option;
ambiguous->flags = abbrev->flags;
}
abbrev->option = option;
abbrev->flags = flags;
}
static enum parse_opt_result parse_long_opt(
struct parse_opt_ctx_t *p, const char *arg,
const struct option *options)
{
const char *arg_end = strchrnul(arg, '=');
const char *arg_start = arg;
enum opt_parsed flags = OPT_LONG;
int arg_starts_with_no_no = 0;
struct parsed_option abbrev = { .option = NULL, .flags = OPT_LONG };
struct parsed_option ambiguous = { .option = NULL, .flags = OPT_LONG };
if (skip_prefix(arg_start, "no-", &arg_start)) {
if (skip_prefix(arg_start, "no-", &arg_start))
arg_starts_with_no_no = 1;
else
flags |= OPT_UNSET;
}
for (; options->type != OPTION_END; options++) {
const char *rest, *long_name = options->long_name;
enum opt_parsed opt_flags = OPT_LONG;
int allow_unset = !(options->flags & PARSE_OPT_NONEG);
if (options->type == OPTION_SUBCOMMAND)
continue;
if (!long_name)
continue;
if (skip_prefix(long_name, "no-", &long_name))
opt_flags |= OPT_UNSET;
else if (arg_starts_with_no_no)
continue;
if (((flags ^ opt_flags) & OPT_UNSET) && !allow_unset)
continue;
if (skip_prefix(arg_start, long_name, &rest)) {
if (*rest == '=')
p->opt = rest + 1;
else if (*rest)
continue;
return get_value(p, options, flags ^ opt_flags);
}
/* abbreviated? */
if (!strncmp(long_name, arg_start, arg_end - arg_start))
register_abbrev(p, options, flags ^ opt_flags,
&abbrev, &ambiguous);
/* negated and abbreviated very much? */
if (allow_unset && starts_with("no-", arg))
register_abbrev(p, options, OPT_UNSET ^ opt_flags,
&abbrev, &ambiguous);
}
if (disallow_abbreviated_options && (ambiguous.option || abbrev.option))
die("disallowed abbreviated or ambiguous option '%.*s'",
(int)(arg_end - arg), arg);
if (ambiguous.option) {
error(_("ambiguous option: %s "
"(could be --%s%s or --%s%s)"),
arg,
(ambiguous.flags & OPT_UNSET) ? "no-" : "",
ambiguous.option->long_name,
(abbrev.flags & OPT_UNSET) ? "no-" : "",
abbrev.option->long_name);
return PARSE_OPT_HELP;
}
if (abbrev.option) {
if (*arg_end)
p->opt = arg_end + 1;
return get_value(p, abbrev.option, abbrev.flags);
}
return PARSE_OPT_UNKNOWN;
}
static enum parse_opt_result parse_nodash_opt(struct parse_opt_ctx_t *p,
const char *arg,
const struct option *options)
{
for (; options->type != OPTION_END; options++) {
if (!(options->flags & PARSE_OPT_NODASH))
continue;
if (options->short_name == arg[0] && arg[1] == '\0')
return get_value(p, options, OPT_SHORT);
}
return PARSE_OPT_ERROR;
}
static enum parse_opt_result parse_subcommand(const char *arg,
const struct option *options)
{
for (; options->type != OPTION_END; options++)
if (options->type == OPTION_SUBCOMMAND &&
!strcmp(options->long_name, arg)) {
*(parse_opt_subcommand_fn **)options->value = options->subcommand_fn;
return PARSE_OPT_SUBCOMMAND;
}
return PARSE_OPT_UNKNOWN;
}
static void check_typos(const char *arg, const struct option *options)
{
if (strlen(arg) < 3)
return;
if (starts_with(arg, "no-")) {
error(_("did you mean `--%s` (with two dashes)?"), arg);
exit(129);
}
for (; options->type != OPTION_END; options++) {
if (!options->long_name)
continue;
if (starts_with(options->long_name, arg)) {
error(_("did you mean `--%s` (with two dashes)?"), arg);
exit(129);
}
}
}
static void parse_options_check(const struct option *opts)
{
char short_opts[128];
void *subcommand_value = NULL;
memset(short_opts, '\0', sizeof(short_opts));
for (; opts->type != OPTION_END; opts++) {
if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
(opts->flags & PARSE_OPT_OPTARG))
optbug(opts, "uses incompatible flags "
"LASTARG_DEFAULT and OPTARG");
if (opts->short_name) {
if (0x7F <= opts->short_name)
optbug(opts, "invalid short name");
else if (short_opts[opts->short_name]++)
optbug(opts, "short name already used");
}
if (opts->flags & PARSE_OPT_NODASH &&
((opts->flags & PARSE_OPT_OPTARG) ||
!(opts->flags & PARSE_OPT_NOARG) ||
!(opts->flags & PARSE_OPT_NONEG) ||
opts->long_name))
optbug(opts, "uses feature "
"not supported for dashless options");
if (opts->type == OPTION_SET_INT && !opts->defval &&
opts->long_name && !(opts->flags & PARSE_OPT_NONEG))
optbug(opts, "OPTION_SET_INT 0 should not be negatable");
switch (opts->type) {
case OPTION_COUNTUP:
case OPTION_BIT:
case OPTION_NEGBIT:
case OPTION_SET_INT:
case OPTION_NUMBER:
if ((opts->flags & PARSE_OPT_OPTARG) ||
!(opts->flags & PARSE_OPT_NOARG))
optbug(opts, "should not accept an argument");
break;
case OPTION_CALLBACK:
if (!opts->callback && !opts->ll_callback)
optbug(opts, "OPTION_CALLBACK needs one callback");
else if (opts->callback && opts->ll_callback)
optbug(opts, "OPTION_CALLBACK can't have two callbacks");
break;
case OPTION_LOWLEVEL_CALLBACK:
if (!opts->ll_callback)
optbug(opts, "OPTION_LOWLEVEL_CALLBACK needs a callback");
if (opts->callback)
optbug(opts, "OPTION_LOWLEVEL_CALLBACK needs no high level callback");
break;
case OPTION_ALIAS:
optbug(opts, "OPT_ALIAS() should not remain at this point. "
"Are you using parse_options_step() directly?\n"
"That case is not supported yet.");
break;
case OPTION_SUBCOMMAND:
if (!opts->value || !opts->subcommand_fn)
optbug(opts, "OPTION_SUBCOMMAND needs a value and a subcommand function");
if (!subcommand_value)
subcommand_value = opts->value;
else if (subcommand_value != opts->value)
optbug(opts, "all OPTION_SUBCOMMANDs need the same value");
break;
default:
; /* ok. (usually accepts an argument) */
}
if (opts->argh &&
strcspn(opts->argh, " _") != strlen(opts->argh))
optbug(opts, "multi-word argh should use dash to separate words");
}
BUG_if_bug("invalid 'struct option'");
}
static int has_subcommands(const struct option *options)
{
for (; options->type != OPTION_END; options++)
if (options->type == OPTION_SUBCOMMAND)
return 1;
return 0;
}
static void parse_options_start_1(struct parse_opt_ctx_t *ctx,
int argc, const char **argv, const char *prefix,
const struct option *options,
enum parse_opt_flags flags)
{
ctx->argc = argc;
ctx->argv = argv;
if (!(flags & PARSE_OPT_ONE_SHOT)) {
ctx->argc--;
ctx->argv++;
}
ctx->total = ctx->argc;
ctx->out = argv;
ctx->prefix = prefix;
ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
ctx->flags = flags;
ctx->has_subcommands = has_subcommands(options);
if (!ctx->has_subcommands && (flags & PARSE_OPT_SUBCOMMAND_OPTIONAL))
BUG("Using PARSE_OPT_SUBCOMMAND_OPTIONAL without subcommands");
if (ctx->has_subcommands) {
if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
BUG("subcommands are incompatible with PARSE_OPT_STOP_AT_NON_OPTION");
if (!(flags & PARSE_OPT_SUBCOMMAND_OPTIONAL)) {
if (flags & PARSE_OPT_KEEP_UNKNOWN_OPT)
BUG("subcommands are incompatible with PARSE_OPT_KEEP_UNKNOWN_OPT unless in combination with PARSE_OPT_SUBCOMMAND_OPTIONAL");
if (flags & PARSE_OPT_KEEP_DASHDASH)
BUG("subcommands are incompatible with PARSE_OPT_KEEP_DASHDASH unless in combination with PARSE_OPT_SUBCOMMAND_OPTIONAL");
}
}
if ((flags & PARSE_OPT_KEEP_UNKNOWN_OPT) &&
(flags & PARSE_OPT_STOP_AT_NON_OPTION) &&
!(flags & PARSE_OPT_ONE_SHOT))
BUG("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
if ((flags & PARSE_OPT_ONE_SHOT) &&
(flags & PARSE_OPT_KEEP_ARGV0))
BUG("Can't keep argv0 if you don't have it");
parse_options_check(options);
build_cmdmode_list(ctx, options);
}
void parse_options_start(struct parse_opt_ctx_t *ctx,
int argc, const char **argv, const char *prefix,
const struct option *options,
enum parse_opt_flags flags)
{
memset(ctx, 0, sizeof(*ctx));
parse_options_start_1(ctx, argc, argv, prefix, options, flags);
}
static void show_negated_gitcomp(const struct option *opts, int show_all,
int nr_noopts)
{
int printed_dashdash = 0;
for (; opts->type != OPTION_END; opts++) {
int has_unset_form = 0;
const char *name;
if (!opts->long_name)
continue;
if (!show_all &&
(opts->flags & (PARSE_OPT_HIDDEN | PARSE_OPT_NOCOMPLETE)))
continue;
if (opts->flags & PARSE_OPT_NONEG)
continue;
switch (opts->type) {
case OPTION_STRING:
case OPTION_FILENAME:
case OPTION_INTEGER:
case OPTION_MAGNITUDE:
case OPTION_CALLBACK:
case OPTION_BIT:
case OPTION_NEGBIT:
case OPTION_COUNTUP:
case OPTION_SET_INT:
has_unset_form = 1;
break;
default:
break;
}
if (!has_unset_form)
continue;
if (skip_prefix(opts->long_name, "no-", &name)) {
if (nr_noopts < 0)
printf(" --%s", name);
} else if (nr_noopts >= 0) {
if (nr_noopts && !printed_dashdash) {
printf(" --");
printed_dashdash = 1;
}
printf(" --no-%s", opts->long_name);
nr_noopts++;
}
}
}
static int show_gitcomp(const struct option *opts, int show_all)
{
const struct option *original_opts = opts;
int nr_noopts = 0;
for (; opts->type != OPTION_END; opts++) {
const char *prefix = "--";
const char *suffix = "";
if (!opts->long_name)
continue;
if (!show_all &&
(opts->flags & (PARSE_OPT_HIDDEN | PARSE_OPT_NOCOMPLETE | PARSE_OPT_FROM_ALIAS)))
continue;
switch (opts->type) {
case OPTION_SUBCOMMAND:
prefix = "";
break;
case OPTION_GROUP:
continue;
case OPTION_STRING:
case OPTION_FILENAME:
case OPTION_INTEGER:
case OPTION_MAGNITUDE:
case OPTION_CALLBACK:
if (opts->flags & PARSE_OPT_NOARG)
break;
if (opts->flags & PARSE_OPT_OPTARG)
break;
if (opts->flags & PARSE_OPT_LASTARG_DEFAULT)
break;
suffix = "=";
break;
default:
break;
}
if (opts->flags & PARSE_OPT_COMP_ARG)
suffix = "=";
if (starts_with(opts->long_name, "no-"))
nr_noopts++;
printf("%s%s%s%s", opts == original_opts ? "" : " ",
prefix, opts->long_name, suffix);
}
show_negated_gitcomp(original_opts, show_all, -1);
show_negated_gitcomp(original_opts, show_all, nr_noopts);
fputc('\n', stdout);
return PARSE_OPT_COMPLETE;
}
/*
* Scan and may produce a new option[] array, which should be used
* instead of the original 'options'.
*
* Right now this is only used to preprocess and substitute
* OPTION_ALIAS.
*
* The returned options should be freed using free_preprocessed_options.
*/
static struct option *preprocess_options(struct parse_opt_ctx_t *ctx,
const struct option *options)
{
struct option *newopt;
int i, nr, alias;
int nr_aliases = 0;
for (nr = 0; options[nr].type != OPTION_END; nr++) {
if (options[nr].type == OPTION_ALIAS)
nr_aliases++;
}
if (!nr_aliases)
return NULL;
DUP_ARRAY(newopt, options, nr + 1);
/* each alias has two string pointers and NULL */
CALLOC_ARRAY(ctx->alias_groups, 3 * (nr_aliases + 1));
for (alias = 0, i = 0; i < nr; i++) {
int short_name;
const char *long_name;
const char *source;
struct strbuf help = STRBUF_INIT;
int j;
if (newopt[i].type != OPTION_ALIAS)
continue;
short_name = newopt[i].short_name;
long_name = newopt[i].long_name;
source = newopt[i].value;
if (!long_name)
BUG("An alias must have long option name");
strbuf_addf(&help, _("alias of --%s"), source);
for (j = 0; j < nr; j++) {
const char *name = options[j].long_name;
if (!name || strcmp(name, source))
continue;
if (options[j].type == OPTION_ALIAS)
BUG("No please. Nested aliases are not supported.");
memcpy(newopt + i, options + j, sizeof(*newopt));
newopt[i].short_name = short_name;
newopt[i].long_name = long_name;
newopt[i].help = strbuf_detach(&help, NULL);
newopt[i].flags |= PARSE_OPT_FROM_ALIAS;
break;
}
if (j == nr)
BUG("could not find source option '%s' of alias '%s'",
source, newopt[i].long_name);
ctx->alias_groups[alias * 3 + 0] = newopt[i].long_name;
ctx->alias_groups[alias * 3 + 1] = options[j].long_name;
ctx->alias_groups[alias * 3 + 2] = NULL;
alias++;
}
return newopt;
}
static void free_preprocessed_options(struct option *options)
{
int i;
if (!options)
return;
for (i = 0; options[i].type != OPTION_END; i++) {
if (options[i].flags & PARSE_OPT_FROM_ALIAS)
free((void *)options[i].help);
}
free(options);
}
static enum parse_opt_result usage_with_options_internal(struct parse_opt_ctx_t *,
const char * const *,
const struct option *,
int, int);
enum parse_opt_result parse_options_step(struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
/* we must reset ->opt, unknown short option leave it dangling */
ctx->opt = NULL;
for (; ctx->argc; ctx->argc--, ctx->argv++) {
const char *arg = ctx->argv[0];
if (ctx->flags & PARSE_OPT_ONE_SHOT &&
ctx->argc != ctx->total)
break;
if (*arg != '-' || !arg[1]) {
if (parse_nodash_opt(ctx, arg, options) == 0)
continue;
if (!ctx->has_subcommands) {
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
return PARSE_OPT_NON_OPTION;
ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
switch (parse_subcommand(arg, options)) {
case PARSE_OPT_SUBCOMMAND:
return PARSE_OPT_SUBCOMMAND;
case PARSE_OPT_UNKNOWN:
if (ctx->flags & PARSE_OPT_SUBCOMMAND_OPTIONAL)
/*
* arg is neither a short or long
* option nor a subcommand. Since
* this command has a default
* operation mode, we have to treat
* this arg and all remaining args
* as args meant to that default
* operation mode.
* So we are done parsing.
*/
return PARSE_OPT_DONE;
error(_("unknown subcommand: `%s'"), arg);
usage_with_options(usagestr, options);
case PARSE_OPT_COMPLETE:
case PARSE_OPT_HELP:
case PARSE_OPT_ERROR:
case PARSE_OPT_DONE:
case PARSE_OPT_NON_OPTION:
/* Impossible. */
BUG("parse_subcommand() cannot return these");
}
}
/* lone -h asks for help */
if (internal_help && ctx->total == 1 && !strcmp(arg + 1, "h"))
goto show_usage;
/*
* lone --git-completion-helper and --git-completion-helper-all
* are asked by git-completion.bash
*/
if (ctx->total == 1 && !strcmp(arg, "--git-completion-helper"))
return show_gitcomp(options, 0);
if (ctx->total == 1 && !strcmp(arg, "--git-completion-helper-all"))
return show_gitcomp(options, 1);
if (arg[1] != '-') {
ctx->opt = arg + 1;
switch (parse_short_opt(ctx, options)) {
case PARSE_OPT_ERROR:
return PARSE_OPT_ERROR;
case PARSE_OPT_UNKNOWN:
if (ctx->opt)
check_typos(arg + 1, options);
if (internal_help && *ctx->opt == 'h')
goto show_usage;
goto unknown;
case PARSE_OPT_NON_OPTION:
case PARSE_OPT_SUBCOMMAND:
case PARSE_OPT_HELP:
case PARSE_OPT_COMPLETE:
BUG("parse_short_opt() cannot return these");
case PARSE_OPT_DONE:
break;
}
if (ctx->opt)
check_typos(arg + 1, options);
while (ctx->opt) {
switch (parse_short_opt(ctx, options)) {
case PARSE_OPT_ERROR:
return PARSE_OPT_ERROR;
case PARSE_OPT_UNKNOWN:
if (internal_help && *ctx->opt == 'h')
goto show_usage;
/* fake a short option thing to hide the fact that we may have
* started to parse aggregated stuff
*
* This is leaky, too bad.
*/
ctx->argv[0] = xstrdup(ctx->opt - 1);
*(char *)ctx->argv[0] = '-';
goto unknown;
case PARSE_OPT_NON_OPTION:
case PARSE_OPT_SUBCOMMAND:
case PARSE_OPT_COMPLETE:
case PARSE_OPT_HELP:
BUG("parse_short_opt() cannot return these");
case PARSE_OPT_DONE:
break;
}
}
continue;
}
if (!arg[2] /* "--" */) {
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
ctx->argc--;
ctx->argv++;
}
break;
} else if (!strcmp(arg + 2, "end-of-options")) {
if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN_OPT)) {
ctx->argc--;
ctx->argv++;
}
break;
}
if (internal_help && !strcmp(arg + 2, "help-all"))
return usage_with_options_internal(ctx, usagestr, options, 1, 0);
if (internal_help && !strcmp(arg + 2, "help"))
goto show_usage;
switch (parse_long_opt(ctx, arg + 2, options)) {
case PARSE_OPT_ERROR:
return PARSE_OPT_ERROR;
case PARSE_OPT_UNKNOWN:
goto unknown;
case PARSE_OPT_HELP:
goto show_usage;
case PARSE_OPT_NON_OPTION:
case PARSE_OPT_SUBCOMMAND:
case PARSE_OPT_COMPLETE:
BUG("parse_long_opt() cannot return these");
case PARSE_OPT_DONE:
break;
}
continue;
unknown:
if (ctx->flags & PARSE_OPT_ONE_SHOT)
break;
if (ctx->has_subcommands &&
(ctx->flags & PARSE_OPT_SUBCOMMAND_OPTIONAL) &&
(ctx->flags & PARSE_OPT_KEEP_UNKNOWN_OPT)) {
/*
* Found an unknown option given to a command with
* subcommands that has a default operation mode:
* we treat this option and all remaining args as
* arguments meant to that default operation mode.
* So we are done parsing.
*/
return PARSE_OPT_DONE;
}
if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN_OPT))
return PARSE_OPT_UNKNOWN;
ctx->out[ctx->cpidx++] = ctx->argv[0];
ctx->opt = NULL;
}
return PARSE_OPT_DONE;