mirror of
https://github.com/git/git.git
synced 2024-12-12 11:24:02 +08:00
179c94b24a
* maint-1.5.4: core-tutorial.txt: Fix showing the current behaviour. git-archive: ignore prefix when checking file attribute Fix documentation syntax of optional arguments in short options.
419 lines
10 KiB
C
419 lines
10 KiB
C
#include "git-compat-util.h"
|
|
#include "parse-options.h"
|
|
|
|
#define OPT_SHORT 1
|
|
#define OPT_UNSET 2
|
|
|
|
struct optparse_t {
|
|
const char **argv;
|
|
const char **out;
|
|
int argc, cpidx;
|
|
const char *opt;
|
|
};
|
|
|
|
static inline const char *get_arg(struct optparse_t *p)
|
|
{
|
|
if (p->opt) {
|
|
const char *res = p->opt;
|
|
p->opt = NULL;
|
|
return res;
|
|
}
|
|
p->argc--;
|
|
return *++p->argv;
|
|
}
|
|
|
|
static inline const char *skip_prefix(const char *str, const char *prefix)
|
|
{
|
|
size_t len = strlen(prefix);
|
|
return strncmp(str, prefix, len) ? NULL : str + len;
|
|
}
|
|
|
|
static int opterror(const struct option *opt, const char *reason, int flags)
|
|
{
|
|
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);
|
|
}
|
|
|
|
static int get_value(struct optparse_t *p,
|
|
const struct option *opt, int flags)
|
|
{
|
|
const char *s, *arg;
|
|
const int unset = flags & OPT_UNSET;
|
|
|
|
if (unset && p->opt)
|
|
return opterror(opt, "takes no value", flags);
|
|
if (unset && (opt->flags & PARSE_OPT_NONEG))
|
|
return opterror(opt, "isn't available", flags);
|
|
|
|
if (!(flags & OPT_SHORT) && p->opt) {
|
|
switch (opt->type) {
|
|
case OPTION_CALLBACK:
|
|
if (!(opt->flags & PARSE_OPT_NOARG))
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case OPTION_BOOLEAN:
|
|
case OPTION_BIT:
|
|
case OPTION_SET_INT:
|
|
case OPTION_SET_PTR:
|
|
return opterror(opt, "takes no value", flags);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
|
|
switch (opt->type) {
|
|
case OPTION_BIT:
|
|
if (unset)
|
|
*(int *)opt->value &= ~opt->defval;
|
|
else
|
|
*(int *)opt->value |= opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_BOOLEAN:
|
|
*(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_SET_PTR:
|
|
*(void **)opt->value = unset ? NULL : (void *)opt->defval;
|
|
return 0;
|
|
|
|
case OPTION_STRING:
|
|
if (unset) {
|
|
*(const char **)opt->value = NULL;
|
|
return 0;
|
|
}
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
|
|
*(const char **)opt->value = (const char *)opt->defval;
|
|
return 0;
|
|
}
|
|
if (!arg)
|
|
return opterror(opt, "requires a value", flags);
|
|
*(const char **)opt->value = get_arg(p);
|
|
return 0;
|
|
|
|
case OPTION_CALLBACK:
|
|
if (unset)
|
|
return (*opt->callback)(opt, NULL, 1);
|
|
if (opt->flags & PARSE_OPT_NOARG)
|
|
return (*opt->callback)(opt, NULL, 0);
|
|
if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
|
|
return (*opt->callback)(opt, NULL, 0);
|
|
if (!arg)
|
|
return opterror(opt, "requires a value", flags);
|
|
return (*opt->callback)(opt, get_arg(p), 0);
|
|
|
|
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 (!arg)
|
|
return opterror(opt, "requires a value", flags);
|
|
*(int *)opt->value = strtol(get_arg(p), (char **)&s, 10);
|
|
if (*s)
|
|
return opterror(opt, "expects a numerical value", flags);
|
|
return 0;
|
|
|
|
default:
|
|
die("should not happen, someone must be hit on the forehead");
|
|
}
|
|
}
|
|
|
|
static int parse_short_opt(struct optparse_t *p, const struct option *options)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
return error("unknown switch `%c'", *p->opt);
|
|
}
|
|
|
|
static int parse_long_opt(struct optparse_t *p, const char *arg,
|
|
const struct option *options)
|
|
{
|
|
const char *arg_end = strchr(arg, '=');
|
|
const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
|
|
int abbrev_flags = 0, ambiguous_flags = 0;
|
|
|
|
if (!arg_end)
|
|
arg_end = arg + strlen(arg);
|
|
|
|
for (; options->type != OPTION_END; options++) {
|
|
const char *rest;
|
|
int flags = 0;
|
|
|
|
if (!options->long_name)
|
|
continue;
|
|
|
|
rest = skip_prefix(arg, options->long_name);
|
|
if (options->type == OPTION_ARGUMENT) {
|
|
if (!rest)
|
|
continue;
|
|
if (*rest == '=')
|
|
return opterror(options, "takes no value", flags);
|
|
if (*rest)
|
|
continue;
|
|
p->out[p->cpidx++] = arg - 2;
|
|
return 0;
|
|
}
|
|
if (!rest) {
|
|
/* abbreviated? */
|
|
if (!strncmp(options->long_name, arg, arg_end - arg)) {
|
|
is_abbreviated:
|
|
if (abbrev_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;
|
|
}
|
|
if (!(flags & OPT_UNSET) && *arg_end)
|
|
p->opt = arg_end + 1;
|
|
abbrev_option = options;
|
|
abbrev_flags = flags;
|
|
continue;
|
|
}
|
|
/* negated and abbreviated very much? */
|
|
if (!prefixcmp("no-", arg)) {
|
|
flags |= OPT_UNSET;
|
|
goto is_abbreviated;
|
|
}
|
|
/* negated? */
|
|
if (strncmp(arg, "no-", 3))
|
|
continue;
|
|
flags |= OPT_UNSET;
|
|
rest = skip_prefix(arg + 3, options->long_name);
|
|
/* abbreviated and negated? */
|
|
if (!rest && !prefixcmp(options->long_name, arg + 3))
|
|
goto is_abbreviated;
|
|
if (!rest)
|
|
continue;
|
|
}
|
|
if (*rest) {
|
|
if (*rest != '=')
|
|
continue;
|
|
p->opt = rest + 1;
|
|
}
|
|
return get_value(p, options, flags);
|
|
}
|
|
|
|
if (ambiguous_option)
|
|
return 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);
|
|
if (abbrev_option)
|
|
return get_value(p, abbrev_option, abbrev_flags);
|
|
return error("unknown option `%s'", arg);
|
|
}
|
|
|
|
void check_typos(const char *arg, const struct option *options)
|
|
{
|
|
if (strlen(arg) < 3)
|
|
return;
|
|
|
|
if (!prefixcmp(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 (!prefixcmp(options->long_name, arg)) {
|
|
error ("did you mean `--%s` (with two dashes ?)", arg);
|
|
exit(129);
|
|
}
|
|
}
|
|
}
|
|
|
|
static NORETURN void usage_with_options_internal(const char * const *,
|
|
const struct option *, int);
|
|
|
|
int parse_options(int argc, const char **argv, const struct option *options,
|
|
const char * const usagestr[], int flags)
|
|
{
|
|
struct optparse_t args = { argv + 1, argv, argc - 1, 0, NULL };
|
|
|
|
for (; args.argc; args.argc--, args.argv++) {
|
|
const char *arg = args.argv[0];
|
|
|
|
if (*arg != '-' || !arg[1]) {
|
|
if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
|
|
break;
|
|
args.out[args.cpidx++] = args.argv[0];
|
|
continue;
|
|
}
|
|
|
|
if (arg[1] != '-') {
|
|
args.opt = arg + 1;
|
|
if (*args.opt == 'h')
|
|
usage_with_options(usagestr, options);
|
|
if (parse_short_opt(&args, options) < 0)
|
|
usage_with_options(usagestr, options);
|
|
if (args.opt)
|
|
check_typos(arg + 1, options);
|
|
while (args.opt) {
|
|
if (*args.opt == 'h')
|
|
usage_with_options(usagestr, options);
|
|
if (parse_short_opt(&args, options) < 0)
|
|
usage_with_options(usagestr, options);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!arg[2]) { /* "--" */
|
|
if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
|
|
args.argc--;
|
|
args.argv++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!strcmp(arg + 2, "help-all"))
|
|
usage_with_options_internal(usagestr, options, 1);
|
|
if (!strcmp(arg + 2, "help"))
|
|
usage_with_options(usagestr, options);
|
|
if (parse_long_opt(&args, arg + 2, options))
|
|
usage_with_options(usagestr, options);
|
|
}
|
|
|
|
memmove(args.out + args.cpidx, args.argv, args.argc * sizeof(*args.out));
|
|
args.out[args.cpidx + args.argc] = NULL;
|
|
return args.cpidx + args.argc;
|
|
}
|
|
|
|
#define USAGE_OPTS_WIDTH 24
|
|
#define USAGE_GAP 2
|
|
|
|
void usage_with_options_internal(const char * const *usagestr,
|
|
const struct option *opts, int full)
|
|
{
|
|
fprintf(stderr, "usage: %s\n", *usagestr++);
|
|
while (*usagestr && **usagestr)
|
|
fprintf(stderr, " or: %s\n", *usagestr++);
|
|
while (*usagestr)
|
|
fprintf(stderr, " %s\n", *usagestr++);
|
|
|
|
if (opts->type != OPTION_GROUP)
|
|
fputc('\n', stderr);
|
|
|
|
for (; opts->type != OPTION_END; opts++) {
|
|
size_t pos;
|
|
int pad;
|
|
|
|
if (opts->type == OPTION_GROUP) {
|
|
fputc('\n', stderr);
|
|
if (*opts->help)
|
|
fprintf(stderr, "%s\n", opts->help);
|
|
continue;
|
|
}
|
|
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
|
|
continue;
|
|
|
|
pos = fprintf(stderr, " ");
|
|
if (opts->short_name)
|
|
pos += fprintf(stderr, "-%c", opts->short_name);
|
|
if (opts->long_name && opts->short_name)
|
|
pos += fprintf(stderr, ", ");
|
|
if (opts->long_name)
|
|
pos += fprintf(stderr, "--%s", opts->long_name);
|
|
|
|
switch (opts->type) {
|
|
case OPTION_ARGUMENT:
|
|
break;
|
|
case OPTION_INTEGER:
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
pos += fprintf(stderr, "[<n>]");
|
|
else
|
|
pos += fprintf(stderr, " <n>");
|
|
break;
|
|
case OPTION_CALLBACK:
|
|
if (opts->flags & PARSE_OPT_NOARG)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case OPTION_STRING:
|
|
if (opts->argh) {
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
pos += fprintf(stderr, " [<%s>]", opts->argh);
|
|
else
|
|
pos += fprintf(stderr, " <%s>", opts->argh);
|
|
} else {
|
|
if (opts->flags & PARSE_OPT_OPTARG)
|
|
pos += fprintf(stderr, " [...]");
|
|
else
|
|
pos += fprintf(stderr, " ...");
|
|
}
|
|
break;
|
|
default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
|
|
break;
|
|
}
|
|
|
|
if (pos <= USAGE_OPTS_WIDTH)
|
|
pad = USAGE_OPTS_WIDTH - pos;
|
|
else {
|
|
fputc('\n', stderr);
|
|
pad = USAGE_OPTS_WIDTH;
|
|
}
|
|
fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
|
|
}
|
|
fputc('\n', stderr);
|
|
|
|
exit(129);
|
|
}
|
|
|
|
void usage_with_options(const char * const *usagestr,
|
|
const struct option *opts)
|
|
{
|
|
usage_with_options_internal(usagestr, opts, 0);
|
|
}
|
|
|
|
/*----- some often used options -----*/
|
|
#include "cache.h"
|
|
|
|
int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
|
|
{
|
|
int v;
|
|
|
|
if (!arg) {
|
|
v = unset ? 0 : DEFAULT_ABBREV;
|
|
} else {
|
|
v = strtol(arg, (char **)&arg, 10);
|
|
if (*arg)
|
|
return opterror(opt, "expects a numerical value", 0);
|
|
if (v && v < MINIMUM_ABBREV)
|
|
v = MINIMUM_ABBREV;
|
|
else if (v > 40)
|
|
v = 40;
|
|
}
|
|
*(int *)(opt->value) = v;
|
|
return 0;
|
|
}
|
|
|
|
int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
|
|
int unset)
|
|
{
|
|
*(unsigned long *)(opt->value) = approxidate(arg);
|
|
return 0;
|
|
}
|