Add gulp-image types. (#24889)

types/gulp-image/gulp-image-tests.ts

@@ -0,0 +1,28 @@
+import image = require('gulp-image');
+
+image(false);                   // $ExpectError
+
+image();                        // $ExpectType Transform
+image({});
+image({
+    pngquant: true,
+    optipng: false,
+    zopflipng: true,
+    jpegRecompress: false,
+    mozjpeg: true,
+    guetzli: false,
+    gifsicle: true,
+    svgo: true,
+    concurrent: 10,
+    quiet: true // defaults to false
+});
+image({
+    optipng: ['-i 1', '-strip all', '-fix', '-o7', '-force'],
+    pngquant: ['--speed=1', '--force', 256],
+    zopflipng: ['-y', '--lossy_8bit', '--lossy_transparent'],
+    jpegRecompress: ['--strip', '--quality', 'medium', '--min', 40, '--max', 80],
+    mozjpeg: ['-optimize', '-progressive'],
+    guetzli: ['--quality', 85],
+    gifsicle: ['--optimize'],
+    svgo: ['--enable', 'cleanupIDs', '--disable', 'convertColors']
+});

types/gulp-image/index.d.ts

@@ -0,0 +1,31 @@
+// Type definitions for gulp-image 4.3
+// Project: https://github.com/1000ch/gulp-image#readme
+// Definitions by: Aankhen <https://github.com/Aankhen>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+/// <reference types="node" />
+
+import stream = require("stream");
+
+export = GulpImage;
+
+declare function GulpImage(options?: GulpImage.Options): stream.Transform;
+
+declare namespace GulpImage {
+    type OptimizerSetting = boolean
+        | any[];
+
+    interface Options {
+        pngquant?: OptimizerSetting;
+        optipng?: OptimizerSetting;
+        zopflipng?: OptimizerSetting;
+        jpegRecompress?: OptimizerSetting;
+        mozjpeg?: OptimizerSetting;
+        guetzli?: OptimizerSetting;
+        gifsicle?: OptimizerSetting;
+        svgo?: OptimizerSetting;
+        concurrent?: number;
+        quiet?: boolean;
+    }
+}

types/gulp-image/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "gulp-image-tests.ts"
+    ]
+}

types/gulp-image/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }