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/**
* @file cmd_help.c
* @author Adam Piecek <piecek@cesnet.cz>
* @brief 'help' command of the libyang's yanglint tool.
*
* Copyright (c) 2023-2023 CESNET, z.s.p.o.
*
* This source code is licensed under BSD 3-Clause License (the "License").
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*/
#define _GNU_SOURCE
#include "cmd.h"
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include "libyang.h"
#include "common.h"
#include "yl_opt.h"
void
cmd_help_help(void)
{
printf("Usage: help [cmd ...]\n");
}
int
cmd_help_opt(struct yl_opt *yo, const char *cmdline, char ***posv, int *posc)
{
int rc = 0, argc = 0;
int opt, opt_index;
struct option options[] = {
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
if ((rc = parse_cmdline(cmdline, &argc, &yo->argv))) {
return rc;
}
while ((opt = getopt_long(argc, yo->argv, commands[CMD_HELP].optstring, options, &opt_index)) != -1) {
if (opt == 'h') {
cmd_help_help();
return 1;
} else {
YLMSG_E("Unknown option.");
return 1;
}
}
*posv = &yo->argv[optind];
*posc = argc - optind;
return rc;
}
static void
print_generic_help(void)
{
printf("Available commands:\n");
for (uint16_t i = 0; commands[i].name; i++) {
if (commands[i].helpstring != NULL) {
printf(" %-15s %s\n", commands[i].name, commands[i].helpstring);
}
}
}
int
cmd_help_exec(struct ly_ctx **ctx, struct yl_opt *yo, const char *posv)
{
(void)ctx, (void)yo;
if (!posv) {
print_generic_help();
} else {
/* print specific help for the selected command(s) */
int8_t match = 0;
/* get the command of the specified name */
for (uint16_t i = 0; commands[i].name; i++) {
if (strcmp(posv, commands[i].name) == 0) {
match = 1;
if (commands[i].help_func != NULL) {
commands[i].help_func();
} else {
printf("%s: %s\n", posv, commands[i].helpstring);
}
break;
}
}
if (!match) {
/* if unknown command specified, print the list of commands */
printf("Unknown command \'%s\'\n", posv);
print_generic_help();
}
}
return 0;
}
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