11 lines
397 B
TypeScript
11 lines
397 B
TypeScript
export function undefList<T, U>(opt: T | undefined, fn: (opt: T) => U) {
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return opt === undefined ? [] : fn(opt)
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}
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export const optFlag = (flag: string, opt: string | undefined) => undefList(opt, opt => [flag, opt])
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/**
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* Generate a switch flag, like "--rebuild", "--nobuild"
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*/
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export const optSwitch = (flag: string, opt: boolean | undefined) => undefList(opt, opt => opt ? [flag] : [])
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