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Viewing file:     deref-command.js (779 B)      -rw-r--r--

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

const { aliases, cmdList, plumbing } = require('./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 || ''
}