Function parseFlags

Extension/src/SSH/sshCommandToConfig.ts:174–201

* Parses flags from the given array of arguments, returning the index of the * next non-flag in the input (or the total length of the input if none are found).

(input: string[], entries: { [key: string]: string })

 * next non-flag in the input (or the total length of the input if none are found).
 */
function parseFlags(input: string[], entries: { [key: string]: string }): number {
    // prefix with `:` to tell the library not to log anything itself
    const parser: BasicParser = new BasicParser(`:${getOptDirective}`, input, 0);

    while (true) {
        const next: IParsedOption | undefined = parser.getopt();
        if (!next) {
            break;
        }

        if (next.option === ':') {
            throw new CommandParseError(`Expected flag -${next.optopt} to have an argument but it did not`);
        }

        if (next.option === '?') {
            throw new CommandParseError(`Unknown flag ${next.optopt}`);
        }

        const resolver: ((entries: { [key: string]: string }, value: string) => void) | null = flags[next.option];
        if (!resolver) {
            continue; // known but ignored flag
        }

        resolver(entries, next.optarg);
    }

    return parser.optind();
}

/**
 * Parses the SSH connection address. This behaves like OpenSSH and for the