Add type definitions for lazypipe

lazypipe/lazypipe-tests.ts

@@ -0,0 +1,18 @@
+/// <reference path="../gulp/gulp.d.ts" />
+/// <reference path="../gulp-minify-html/gulp-minify-html.d.ts" />
+/// <reference path="../gulp-size/gulp-size.d.ts" />
+/// <reference path="./lazypipe.d.ts" />
+
+import * as gulp from "gulp";
+import minifyHtml = require("gulp-minify-html");
+import size = require("gulp-size");
+import lazypipe = require("lazypipe");
+
+const pipeline = lazypipe()
+    .pipe(size)
+    .pipe(minifyHtml, {})
+    .pipe(size);
+
+gulp.src("*.html")
+    .pipe(pipeline())
+    .pipe(gulp.dest("build"));

lazypipe/lazypipe.d.ts

@@ -0,0 +1,31 @@
+// Type definitions for lazypipe
+// Project: https://github.com/OverZealous/lazypipe
+// Definitions by: Thomas Corbière <https://github.com/tomc974>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts"/>
+
+declare module "lazypipe"
+{
+    interface IPipelineBuilder
+    {
+        /**
+         * Returns a stream where all the internal steps are processed sequentially
+         * and the final result is passed on.
+         */
+        (): NodeJS.ReadWriteStream;
+
+        /**
+         * Creates a new lazy pipeline with all the previous steps, and the new step added to the end.
+         * @param fn A stream creation function to call when the pipeline is created later.
+         * @param args Any remaining arguments are saved and passed into fn when the pipeline is created.
+         */
+        pipe(fn: Function, ...args: any[]): IPipelineBuilder;
+    }
+
+    /**
+     * Initializes a lazypipe.
+     */
+    function lazypipe(): IPipelineBuilder;
+    export = lazypipe;
+}