svrjs/node_modules/tar/lib/warn-mixin.js

'use strict'
module.exports = Base => class extends Base {
  warn (code, message, data = {}) {
    if (this.file) {
      data.file = this.file
    }
    if (this.cwd) {
      data.cwd = this.cwd
    }
    data.code = message instanceof Error && message.code || code
    data.tarCode = code
    if (!this.strict && data.recoverable !== false) {
      if (message instanceof Error) {
        data = Object.assign(message, data)
        message = message.message
      }
      this.emit('warn', data.tarCode, message, data)
    } else if (message instanceof Error) {
      this.emit('error', Object.assign(message, data))
    } else {
      this.emit('error', Object.assign(new Error(`${code}: ${message}`), data))
    }
  }
}