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[cmdline] Generate command option help text automatically

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Generate the command option help text automatically from the list of
defined options.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-11-07 17:00:51 +00:00
parent 6871a8113f
commit 43eba2f555
22 changed files with 93 additions and 75 deletions
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21
src/core/parseopt.c
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@@ -326,8 +326,25 @@ int parse_parameters ( char *text, struct parameters **params ) {
* @v argv Argument list
*/
void print_usage ( struct command_descriptor *cmd, char **argv ) {
printf ( "Usage:\n\n %s %s\n\nSee http://ipxe.org/cmd/%s for further "
"information\n", argv[0], cmd->usage, argv[0] );
struct option_descriptor *option;
unsigned int i;
int is_optional;
printf ( "Usage:\n\n %s", argv[0] );
for ( i = 0 ; i < cmd->num_options ; i++ ) {
option = &cmd->options[i];
printf ( " [-%c|--%s", option->shortopt, option->longopt );
if ( option->has_arg ) {
is_optional = ( option->has_arg == optional_argument );
printf ( " %s<%s>%s", ( is_optional ? "[" : "" ),
option->longopt, ( is_optional ? "]" : "" ) );
}
printf ( "]" );
}
if ( cmd->usage )
printf ( " %s", cmd->usage );
printf ( "\n\nSee http://ipxe.org/cmd/%s for further information\n",
argv[0] );
}
/**