ArgBuilder
Immutable positional argument schema builder.
The type parameter C is a phantom that tracks the value type, presence, and variadic state through the fluent chain. Each modifier returns a new builder — the original is never mutated.
- Import:
@kjanat/dreamcli - Export kind: class
- Declared in:
src/core/schema/arg.ts - Source link:
src/core/schema/arg.ts:261
Signatures
ts
class ArgBuilder<C extends ArgConfig> {}Members
Constructors
constructor
ts
constructor();Properties
_config
Type brand — exists only in the type system (declare produces no runtime property). Used by InferArg / InferArgs.
ts
_config: ArgBuilder.C;schema
Runtime schema descriptor.
ts
schema: ArgSchema;Methods
default
ts
default<V extends unknown>(value: V): ArgBuilder<WithArgPresence<ArgBuilder.C, "defaulted">>;deprecated
ts
deprecated(message?: string): ArgBuilder<ArgBuilder.C>;describe
ts
describe(description: string): ArgBuilder<ArgBuilder.C>;env
ts
env(varName: string): ArgBuilder<ArgBuilder.C>;finite
ts
finite(this: ArgBuilder<ArgBuilder.C & { argKind: "number"; }>, allow: boolean): ArgBuilder<ArgBuilder.C>;int
ts
int(this: ArgBuilder<ArgBuilder.C & { argKind: "number"; }>, value: boolean): ArgBuilder<ArgBuilder.C>;max
ts
max(this: ArgBuilder<ArgBuilder.C & { argKind: "number"; }>, value: number): ArgBuilder<ArgBuilder.C>;min
ts
min(this: ArgBuilder<ArgBuilder.C & { argKind: "number"; }>, value: number): ArgBuilder<ArgBuilder.C>;optional
ts
optional(): ArgBuilder<WithArgPresence<ArgBuilder.C, "optional">>;required
ts
required(): ArgBuilder<WithArgPresence<ArgBuilder.C, "required">>;stdin
ts
stdin(): ArgBuilder<ArgBuilder.C>;variadic
ts
variadic(): ArgBuilder<WithVariadic<ArgBuilder.C>>;Examples
ts
// Full command with multiple args and modifiers
import { command, arg } from '@kjanat/dreamcli';
command('deploy')
.arg('target', arg.string()
.env('DEPLOY_TARGET')
.describe('Deploy target'))
.arg('port', arg.number()
.env('PORT')
.default(3000)
.describe('Port number'))
.arg('files', arg.string()
.variadic()
.optional()
.describe('Extra config files'))
.action(({ args }) => {
args.target; // string (required, from CLI or $DEPLOY_TARGET)
args.port; // number (defaulted, from CLI, $PORT, or 3000)
args.files; // string[] (optional variadic)
});ts
// Type inference
const target = arg.string();
type T = InferArg<typeof target>; // string
const opt = arg.string().optional();
type O = InferArg<typeof opt>; // string | undefined
const files = arg.string().variadic();
type F = InferArg<typeof files>; // string[]