mpv/options/parse_commandline.c

261 lines
8.0 KiB
C

/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <stdbool.h>
#include "osdep/io.h"
#include "common/global.h"
#include "common/msg.h"
#include "common/msg_control.h"
#include "m_option.h"
#include "m_config_frontend.h"
#include "options.h"
#include "common/playlist.h"
#include "parse_commandline.h"
#define GLOBAL 0
#define LOCAL 1
struct parse_state {
struct m_config *config;
char **argv;
struct mp_log *log; // silent if NULL
bool no_more_opts;
bool error;
bool is_opt;
struct bstr arg;
struct bstr param;
};
// Returns true if more args, false if all parsed or an error occurred.
static bool split_opt(struct parse_state *p)
{
assert(!p->error);
if (!p->argv || !p->argv[0])
return false;
p->is_opt = false;
p->arg = bstr0(p->argv[0]);
p->param = bstr0(NULL);
p->argv++;
if (p->no_more_opts || !bstr_startswith0(p->arg, "-") || p->arg.len == 1)
return true;
if (bstrcmp0(p->arg, "--") == 0) {
p->no_more_opts = true;
return split_opt(p);
}
p->is_opt = true;
bool new_opt = bstr_eatstart0(&p->arg, "--");
if (!new_opt)
bstr_eatstart0(&p->arg, "-");
bool ambiguous = !bstr_split_tok(p->arg, "=", &p->arg, &p->param);
bool need_param = m_config_option_requires_param(p->config, p->arg) > 0;
if (ambiguous && need_param) {
if (!p->argv[0] || new_opt) {
p->error = true;
MP_FATAL(p, "Error parsing commandline option %.*s: %s\n",
BSTR_P(p->arg), m_option_strerror(M_OPT_MISSING_PARAM));
MP_WARN(p, "Make sure you're using e.g. '--%.*s=value' instead "
"of '--%.*s value'.\n", BSTR_P(p->arg), BSTR_P(p->arg));
return false;
}
p->param = bstr0(p->argv[0]);
p->argv++;
}
return true;
}
#ifdef _WIN32
static void process_non_option(struct playlist *files, const char *arg)
{
glob_t gg;
// Glob filenames on Windows (cmd.exe doesn't do this automatically)
if (glob(arg, 0, NULL, &gg)) {
playlist_append_file(files, arg);
} else {
for (int i = 0; i < gg.gl_pathc; i++)
playlist_append_file(files, gg.gl_pathv[i]);
globfree(&gg);
}
}
#else
static void process_non_option(struct playlist *files, const char *arg)
{
playlist_append_file(files, arg);
}
#endif
// returns M_OPT_... error code
int m_config_parse_mp_command_line(m_config_t *config, struct playlist *files,
struct mpv_global *global, char **argv)
{
int ret = M_OPT_UNKNOWN;
int mode = 0;
struct playlist_entry *local_start = NULL;
int local_params_count = 0;
struct playlist_param *local_params = 0;
assert(config != NULL);
mode = GLOBAL;
struct parse_state p = {config, argv, config->log};
while (split_opt(&p)) {
if (p.is_opt) {
int flags = M_SETOPT_FROM_CMDLINE;
if (mode == LOCAL)
flags |= M_SETOPT_BACKUP | M_SETOPT_CHECK_ONLY;
int r = m_config_set_option_cli(config, p.arg, p.param, flags);
if (r == M_OPT_EXIT) {
ret = r;
goto err_out;
} else if (r < 0) {
MP_FATAL(config, "Setting commandline option --%.*s=%.*s failed.\n",
BSTR_P(p.arg), BSTR_P(p.param));
goto err_out;
}
// Handle some special arguments outside option parser.
if (!bstrcmp0(p.arg, "{")) {
if (mode != GLOBAL) {
MP_ERR(config, "'--{' can not be nested.\n");
goto err_out;
}
mode = LOCAL;
assert(!local_start);
local_start = playlist_get_last(files);
continue;
}
if (!bstrcmp0(p.arg, "}")) {
if (mode != LOCAL) {
MP_ERR(config, "Too many closing '--}'.\n");
goto err_out;
}
if (local_params_count) {
// The files added between '{' and '}' are the entries from
// the entry _after_ local_start, until the end of the list.
// If local_start is NULL, the list was empty on '{', and we
// want all files in the list.
struct playlist_entry *cur = local_start
? playlist_entry_get_rel(local_start, 1)
: playlist_get_first(files);
if (!cur)
MP_WARN(config, "Ignored options!\n");
while (cur) {
playlist_entry_add_params(cur, local_params,
local_params_count);
cur = playlist_entry_get_rel(cur, 1);
}
}
local_params_count = 0;
mode = GLOBAL;
m_config_restore_backups(config);
local_start = NULL;
continue;
}
if (bstrcmp0(p.arg, "playlist") == 0) {
// append the playlist to the local args
char *param0 = bstrdup0(NULL, p.param);
struct playlist *pl = playlist_parse_file(param0, NULL, global);
if (!pl) {
MP_FATAL(config, "Error reading playlist '%.*s'\n",
BSTR_P(p.param));
talloc_free(param0);
goto err_out;
}
playlist_transfer_entries(files, pl);
talloc_free(param0);
talloc_free(pl);
continue;
}
if (mode == LOCAL) {
MP_TARRAY_APPEND(NULL, local_params, local_params_count,
(struct playlist_param) {p.arg, p.param});
}
} else {
// filename
void *tmp = talloc_new(NULL);
char *file0 = bstrdup0(tmp, p.arg);
process_non_option(files, file0);
talloc_free(tmp);
}
}
if (p.error)
goto err_out;
if (mode != GLOBAL) {
MP_ERR(config, "Missing closing --} on command line.\n");
goto err_out;
}
ret = 0; // success
err_out:
talloc_free(local_params);
m_config_restore_backups(config);
return ret;
}
/* Parse some command line options early before main parsing.
* --no-config prevents reading configuration files (otherwise done before
* command line parsing), and --really-quiet suppresses messages printed
* during normal options parsing.
*/
void m_config_preparse_command_line(m_config_t *config, struct mpv_global *global,
int *verbose, char **argv)
{
struct parse_state p = {config, argv, mp_null_log};
while (split_opt(&p)) {
if (p.is_opt) {
// Ignore non-pre-parse options. They will be set later.
// Option parsing errors will be handled later as well.
int flags = M_SETOPT_FROM_CMDLINE | M_SETOPT_PRE_PARSE_ONLY;
m_config_set_option_cli(config, p.arg, p.param, flags);
if (bstrcmp0(p.arg, "v") == 0)
(*verbose)++;
}
}
for (int n = 0; n < config->num_opts; n++)
config->opts[n].warning_was_printed = false;
}