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Ported from https://github.com/mafintosh/end-of-stream with\n// permission from the author, Mathias Buus (@mafintosh).\n'use strict';\n\nvar ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;\n\nfunction once(callback) {\n  var called = false;\n  return function () {\n    if (called) return;\n    called = true;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    callback.apply(this, args);\n  };\n}\n\nfunction noop() {}\n\nfunction isRequest(stream) {\n  return stream.setHeader && typeof stream.abort === 'function';\n}\n\nfunction eos(stream, opts, callback) {\n  if (typeof opts === 'function') return eos(stream, null, opts);\n  if (!opts) opts = {};\n  callback = once(callback || noop);\n  var readable = opts.readable || opts.readable !== false && stream.readable;\n  var writable = opts.writable || opts.writable !== false && stream.writable;\n\n  var 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ERR_STREAM_PREMATURE_CLOSE();\n      return callback.call(stream, err);\n    }\n  };\n\n  var onrequest = function onrequest() {\n    stream.req.on('finish', onfinish);\n  };\n\n  if (isRequest(stream)) {\n    stream.on('complete', onfinish);\n    stream.on('abort', onclose);\n    if (stream.req) onrequest();else stream.on('request', onrequest);\n  } else if (writable && !stream._writableState) {\n    // legacy streams\n    stream.on('end', onlegacyfinish);\n    stream.on('close', onlegacyfinish);\n  }\n\n  stream.on('end', onend);\n  stream.on('finish', onfinish);\n  if (opts.error !== false) stream.on('error', onerror);\n  stream.on('close', onclose);\n  return function () {\n    stream.removeListener('complete', onfinish);\n    stream.removeListener('abort', onclose);\n    stream.removeListener('request', onrequest);\n    if (stream.req) stream.req.removeListener('finish', onfinish);\n    stream.removeListener('end', onlegacyfinish);\n    stream.removeListener('close', 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