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// de-reference abbreviations and shorthands into canonical command name

const { aliases, cmdList, plumbing } = require('../utils/cmd-list.js')
const aliasNames = Object.keys(aliases)
const fullList = cmdList.concat(aliasNames).filter(c => !plumbing.includes(c))
const abbrev = require('abbrev')
const abbrevs = abbrev(fullList)

module.exports = c => {
  if (!c || typeof c !== 'string')
    return ''

  if (c.match(/[A-Z]/))
    c = c.replace(/([A-Z])/g, m => '-' + m.toLowerCase())

  if (plumbing.indexOf(c) !== -1)
    return c

  // first deref the abbrev, if there is one
  // then resolve any aliases
  // so `npm install-cl` will resolve to `install-clean` then to `ci`
  let a = abbrevs[c]
  while (aliases[a])
    a = aliases[a]

  return a || ''
}