function headDoc()

in lib/nano.js [691:720]

• 28 lines of code
• 4 McCabe index (conditional complexity)

    function headDoc (docName, callback) {
      if (missing(docName)) {
        return callbackOrRejectError(callback)
      }
      if (callback) {
        relax({
          db: dbName,
          doc: docName,
          method: 'HEAD',
          qs: {}
        }, callback)
      } else {
        // this function doesn't pass on the Promise from relax because it needs
        // to return the headers when resolving the Promise
        return new Promise(function (resolve, reject) {
          relax({
            db: dbName,
            doc: docName,
            method: 'HEAD',
            qs: {}
          }, function (err, body, headers) {
            if (err) {
              reject(err)
            } else {
              resolve(headers)
            }
          })
        })
      }
    }