void TNLCLIPrintUsage()

in TNLCLI/TNLCLIPrint.m [42:68]
25 lines of code
1 McCabe index (conditional complexity)

void TNLCLIPrintUsage(NSString * __nullable cliName)
{
    // NOTE: when updating the usage, update the README.md too.

    cliName = cliName ?: @"tnlcli";
    tnlcli_fprintf(stderr, "Usage: %s [options] url\n\n", cliName.UTF8String);
    tnlcli_fprintf(stderr, "\tExample: %s --request-method HEAD --response-header-mode file,print --response-header-file response_headers.json https://google.com\n\n", cliName.UTF8String);
    tnlcli_fprintf(stderr, "Argument Options:\n-----------------\n\n");
    tnlcli_fprintf(stderr, "\t--request-config-file <filepath>     TNLRequestConfiguration as a json file\n");
    tnlcli_fprintf(stderr, "\t--request-headers-file <filepath>    json file of key-value-pairs for using as headers\n");
    tnlcli_fprintf(stderr, "\t--request-body-file <filepath>       file for the HTTP body\n");
    tnlcli_fprintf(stderr, "\n");
    tnlcli_fprintf(stderr, "\t--request-header \"Field: Value\"      A header to provide with the request (will override the header if also in the request header file). Can provide multiple headers.\n");
    tnlcli_fprintf(stderr, "\t--request-config \"config: value\"     A config setting for the TNLRequestConfiguration of the request (will override the config if also in the request config file). Can provide multiple configs.\n");
    tnlcli_fprintf(stderr, "\t--request-method <method>            HTTP Method from Section 9 in HTTP/1.1 spec (RFC 2616), such as GET, POST, HEAD, etc\n");
    tnlcli_fprintf(stderr, "\n");
    tnlcli_fprintf(stderr, "\t--response-body-mode <mode>          \"file\" or \"print\" or a combo using commas\n");
    tnlcli_fprintf(stderr, "\t--response-body-file <filepath>      file for the response body to save to (requires \"file\" for --response-body-mode\n");
    tnlcli_fprintf(stderr, "\t--response-headers-mode <mode>       \"file\" or \"print\" or a combo using commas\n");
    tnlcli_fprintf(stderr, "\t--response-headers-file <filepath>   file for the response headers to save to (as json)\n");
    tnlcli_fprintf(stderr, "\n");
    tnlcli_fprintf(stderr, "\t--dump-cert-chain-directory <dir>    directory for the certification chain to be dumped to (as DER files)\n");
    tnlcli_fprintf(stderr, "\n");
    tnlcli_fprintf(stderr, "\t--verbose                            Will print verbose information and force the --response-body-mode and --responde-headers-mode to have \"print\".\n");
    tnlcli_fprintf(stderr, "\t--version                            Will print ther version information.\n");
    tnlcli_fprintf(stderr, "\n");
}