parser toOpts.js

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  module.exports = args => ({errs = [], argv: ARGV = []} = {}) => {
  const opts = []
 
  let at  = 0
  let ARG = ARGV[at]
 
  while (ARG) {
    const options = args[ARG]
 
    let at2 = at + 1
 
    if (options) {
      for (let j = 0; j < options.length; j++) {
        const option = options[j]
 
        let {types} = option
        let values  = []
        if (typeof types === 'undefined' || types === null) {
          let i = at + 1
          let arg = ARGV[i] || '--'
          while (arg !== '--') {
            if (types === null) types = []
            types.push('string')
            values.push(arg)
            i++
            arg = ARGV[i] || '--'
          }
        } else {
          values = ARGV.slice(at + 1, at + types.length + 1)
        }
 
        opts.push({...option, values})
 
        at2 = at + (types === null ? 0 : types.length) + 1
      }
    } else {
      const values = ARGV.slice(at, at + 1)
      if (values.length > 0) opts.push({values})
    }
 
    at  = at2
    ARG = ARGV[at]
  }
 
  return {errs, opts}
}