@octopusdeploy/octojs/lib/utils/isReadableStream.js

A nodejs cli tool for packaging and pushing projects to an Octopus Deploy instance.

var stream = require('stream');

module.exports = function isReadableStream(obj) {
    return obj instanceof stream.Stream && typeof (obj._read) === 'function' && typeof (obj._readableState) === 'object';
}