WIP

node_modules/is-stream/index.js

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+'use strict';
+
+var isStream = module.exports = function (stream) {
+	return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
+};
+
+isStream.writable = function (stream) {
+	return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
+};
+
+isStream.readable = function (stream) {
+	return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
+};
+
+isStream.duplex = function (stream) {
+	return isStream.writable(stream) && isStream.readable(stream);
+};
+
+isStream.transform = function (stream) {
+	return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
+};

node_modules/is-stream/license

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+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

node_modules/is-stream/package.json

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+{
+  "_from": "is-stream@^1.1.0",
+  "_id": "is-stream@1.1.0",
+  "_inBundle": false,
+  "_integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
+  "_location": "/is-stream",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "is-stream@^1.1.0",
+    "name": "is-stream",
+    "escapedName": "is-stream",
+    "rawSpec": "^1.1.0",
+    "saveSpec": null,
+    "fetchSpec": "^1.1.0"
+  },
+  "_requiredBy": [
+    "/execa"
+  ],
+  "_resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
+  "_shasum": "12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44",
+  "_spec": "is-stream@^1.1.0",
+  "_where": "/Users/cbutler/Workspace/OSS/node/@butlerlogic/action-autotag/node_modules/execa",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "bugs": {
+    "url": "https://github.com/sindresorhus/is-stream/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "Check if something is a Node.js stream",
+  "devDependencies": {
+    "ava": "*",
+    "tempfile": "^1.1.0",
+    "xo": "*"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "files": [
+    "index.js"
+  ],
+  "homepage": "https://github.com/sindresorhus/is-stream#readme",
+  "keywords": [
+    "stream",
+    "type",
+    "streams",
+    "writable",
+    "readable",
+    "duplex",
+    "transform",
+    "check",
+    "detect",
+    "is"
+  ],
+  "license": "MIT",
+  "name": "is-stream",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/sindresorhus/is-stream.git"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "version": "1.1.0"
+}

node_modules/is-stream/readme.md

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+# is-stream [![Build Status](https://travis-ci.org/sindresorhus/is-stream.svg?branch=master)](https://travis-ci.org/sindresorhus/is-stream)
+
+> Check if something is a [Node.js stream](https://nodejs.org/api/stream.html)
+
+
+## Install
+
+```
+$ npm install --save is-stream
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const isStream = require('is-stream');
+
+isStream(fs.createReadStream('unicorn.png'));
+//=> true
+
+isStream({});
+//=> false
+```
+
+
+## API
+
+### isStream(stream)
+
+#### isStream.writable(stream)
+
+#### isStream.readable(stream)
+
+#### isStream.duplex(stream)
+
+#### isStream.transform(stream)
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)