Initial commit

.gitignore

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+node_modules
+yarn.lock

index.js

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+"use strict";
+
+const Promise = require("bluebird");
+const propagateAbort = require("@ppstreams/propagate-abort");
+const { isEndOfStream } = require("@ppstreams/end-of-stream-marker");
+
+module.exports = function greedySinkStream(description, callback) {
+	return {
+		description: `greedy sink stream (${description})`,
+		abort: propagateAbort,
+		read: function produceValue_greedySinkStream(source) {
+			let lastResult;
+
+			function attemptRead() {
+				return Promise.try(() => {
+					return source.read();
+				}).then((value) => {
+					return callback(value);
+				}).then((result) => {
+					lastResult = result;
+
+					return attemptRead();
+				}).catch(isEndOfStream, () => {
+					/* Don't attempt to do another read, we're done. We return whatever value we got last from the specified callback. */
+					return lastResult;
+				});
+			}
+
+			return attemptRead();
+		}
+	};
+};

package.json

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+{
+  "name": "@ppstreams/greedy-sink",
+  "version": "0.1.0",
+  "main": "index.js",
+  "repository": "http://git.cryto.net/ppstreams/greedy-sink.git",
+  "author": "Sven Slootweg <admin@cryto.net>",
+  "license": "WTFPL OR CC0-1.0",
+  "dependencies": {
+    "@ppstreams/propagate-abort": "^0.1.2",
+    "bluebird": "^3.5.4"
+  }
+}