can't create no flag commands.

[wh1tecat-nya]

I tried create simple command that uses only arguments (like a file path).
But if do not assignment flag property for makeCommand function 2nd arguments, get an Error: TypeError: t2 is not a function

I did investigation for this.

makeCommand option of flag is Partial type intype CommandSpec.

catacli/src/command.ts

Lines 5 to 26 in 14d54bd

	export type CommandSpec<
	N extends string,
	F extends (args: string[]) => any,
	P extends (args: string[]) => any
	> = {
	name: N;
	description?: string;
	version?: string;
	usage?: string;
	flag?: F;
	positionalArguments?: P;
	handler?: F extends (args: string[]) => infer V
	? P extends (args: string[]) => infer U
	? (
	args: U,
	flags: V,
	helpFn?: Function,
	metaInfo?: { spec?: CommandSpec<N, F, P>; rawArgs?: string[] }
	) => any
	: never
	: never;
	};

But inside of makeCommand function, spec.flag is calling as a function.

catacli/src/command.ts

Lines 45 to 54 in 14d54bd

	export function makeCommand<
	N extends string,
	T extends (args: string[]) => any,
	P extends (args: string[]) => any
	>(spec: CommandSpec<N, T, P>, showHelp = defaultHelp): Command {
	return (args: string[], parentSpec) => {
	const parser = showHelp
	? reduceFlag(defaultHelpFlag, spec.flag)
	: spec.flag;
	const flags = parser(args);

In short, if do not assignment flag property, spec.flag is undefined but called as as function.
then get an Error: TypeError: t2 is not a function.

that is correct?
and if correct this, may i try create a pull request?

[akito0107]

@wh1tecat-nya
Thank you for reporting.

that is correct?

I confirmed this issue and this is a bug. I didn't care about no flag scenario, sorry.

and if correct this, may i try create a pull request?

PRs are very welcome and thank you for contribution !