mirror of
https://git.proxmox.com/git/libgit2
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87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include <stdio.h>
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#include <git2.h>
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#include "common.h"
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#include "cmd.h"
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#define COMMAND_NAME "help"
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static char *command;
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static int show_help;
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static const cli_opt_spec opts[] = {
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CLI_COMMON_OPT,
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{ CLI_OPT_TYPE_ARG, "command", 0, &command, 0,
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CLI_OPT_USAGE_DEFAULT, "command", "the command to show help for" },
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{ 0 },
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};
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static int print_help(void)
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{
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cli_opt_usage_fprint(stdout, PROGRAM_NAME, COMMAND_NAME, opts);
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printf("\n");
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printf("Display help information about %s. If a command is specified, help\n", PROGRAM_NAME);
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printf("about that command will be shown. Otherwise, general information about\n");
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printf("%s will be shown, including the commands available.\n", PROGRAM_NAME);
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return 0;
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}
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static int print_commands(void)
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{
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const cli_cmd_spec *cmd;
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cli_opt_usage_fprint(stdout, PROGRAM_NAME, NULL, cli_common_opts);
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printf("\n");
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printf("These are the %s commands available:\n\n", PROGRAM_NAME);
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for (cmd = cli_cmds; cmd->name; cmd++)
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printf(" %-11s %s\n", cmd->name, cmd->desc);
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printf("\nSee '%s help <command>' for more information on a specific command.\n", PROGRAM_NAME);
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return 0;
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}
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int cmd_help(int argc, char **argv)
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{
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char *fake_args[2];
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const cli_cmd_spec *cmd;
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cli_opt invalid_opt;
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if (cli_opt_parse(&invalid_opt, opts, argv + 1, argc - 1, CLI_OPT_PARSE_GNU))
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return cli_opt_usage_error(COMMAND_NAME, opts, &invalid_opt);
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/* Show the meta-help */
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if (show_help)
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return print_help();
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/* We were not asked to show help for a specific command. */
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if (!command)
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return print_commands();
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/*
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* If we were asked for help for a command (eg, `help <command>`),
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* delegate back to that command's `--help` option. This lets
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* commands own their help. Emulate the command-line arguments
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* that would invoke `<command> --help` and invoke that command.
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*/
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fake_args[0] = command;
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fake_args[1] = "--help";
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if ((cmd = cli_cmd_spec_byname(command)) == NULL)
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return cli_error("'%s' is not a %s command. See '%s help'.",
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command, PROGRAM_NAME, PROGRAM_NAME);
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return cmd->fn(2, fake_args);
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}
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