From 703bb36070ecc7ea4922b2fdd093461027a00cb8 Mon Sep 17 00:00:00 2001
From: Josh Goldberg <josh@fullscreenmario.com>
Date: Sun, 14 Aug 2016 22:15:41 -0700
Subject: [PATCH] Added automatic .d.ts typings copying

Fixes #6.
---
 src/definitions.ts         |  7 ++++++-
 src/setup/.gitignore       |  2 ++
 src/tasks/setup.ts         | 13 +++++++-----
 src/tasks/setup/clean.ts   |  5 +++--
 src/tasks/setup/copy.ts    |  2 +-
 src/tasks/setup/typings.ts | 43 ++++++++++++++++++++++++++++++++++++++
 tsconfig.json              |  1 +
 7 files changed, 64 insertions(+), 9 deletions(-)
 create mode 100644 src/tasks/setup/typings.ts

diff --git a/src/definitions.ts b/src/definitions.ts
index 8ed8a86..c35cc52 100644
--- a/src/definitions.ts
+++ b/src/definitions.ts
@@ -146,7 +146,12 @@ export const Constants = {
         /**
          * Location of all test code.
          */
-        test: "test"
+        test: "test",
+
+        /**
+         * Location of TypeScript typings.
+         */
+        typings: "typings"
     },
 
     /**
diff --git a/src/setup/.gitignore b/src/setup/.gitignore
index c651a34..9ef562b 100644
--- a/src/setup/.gitignore
+++ b/src/setup/.gitignore
@@ -6,5 +6,7 @@ test/**/*.js
 test/index.html
 test/utils/**
 !test/utils/mocks.ts
+typings/**
+!typings/.gitignore
 node_modules/
 npm-debug.log
diff --git a/src/tasks/setup.ts b/src/tasks/setup.ts
index f91d515..454490e 100644
--- a/src/tasks/setup.ts
+++ b/src/tasks/setup.ts
@@ -6,11 +6,14 @@ import { IGulpSettings } from "../definitions";
 export default function (settings: IGulpSettings, callback: Function): void {
     "use strict";
 
-    const tasks: string[] = [
-        "setup:clean",
-        "setup:copy",
-        "setup:package"
+    const tasks: string[][] = [
+        ["setup:clean"],
+        [
+            "setup:copy",
+            "setup:package",
+            "setup:typings"
+        ]
     ];
 
-    require("run-sequence").use(settings.gulp)(tasks, callback);
+    require("run-sequence").use(settings.gulp)(...tasks, callback);
 }
diff --git a/src/tasks/setup/clean.ts b/src/tasks/setup/clean.ts
index 251cda0..e614d76 100644
--- a/src/tasks/setup/clean.ts
+++ b/src/tasks/setup/clean.ts
@@ -2,13 +2,14 @@ const del: any = require("del");
 import { Constants } from "../../definitions";
 
 /**
- * Deletes all built files.
+ * Deletes all generated files.
  */
 export default function (): any {
     "use strict";
 
     return del([
         `${Constants.folders.lib}/**/*`,
-        `${Constants.folders.src}/**/*.js`
+        `${Constants.folders.src}/**/*.js`,
+        `${Constants.folders.typings}/**/*`
     ]);
 }
diff --git a/src/tasks/setup/copy.ts b/src/tasks/setup/copy.ts
index 28abceb..787c19c 100644
--- a/src/tasks/setup/copy.ts
+++ b/src/tasks/setup/copy.ts
@@ -5,7 +5,7 @@ import { IGulpSettings } from "../../definitions";
 /**
  * Deletes all built files.
  */
-export default function taskClean(settings: IGulpSettings): any {
+export default function (settings: IGulpSettings): any {
     "use strict";
 
     return settings.gulp
diff --git a/src/tasks/setup/typings.ts b/src/tasks/setup/typings.ts
new file mode 100644
index 0000000..4c961b4
--- /dev/null
+++ b/src/tasks/setup/typings.ts
@@ -0,0 +1,43 @@
+const fs: any = require("fs");
+import { Constants, IExternal, IGulpSettings } from "../../definitions";
+
+/**
+ * Collects required typings files for a shenanigans project.
+ * 
+ * @param settings   Settings for a shenanigans project.
+ * @returns Required typings file names, keyed to their location.
+ */
+function collectTypingsFiles(settings: IGulpSettings): { [i: string]: string } {
+    "use strict";
+
+    const files: { [i: string]: string } = {};
+
+    for (const dependency of Object.keys(settings.dependencies)) {
+        files[dependency] = `node_modules/${dependency}/lib/${dependency}.d.ts`;
+    }
+
+    for (const i in settings.externals) {
+        if (!settings.externals.hasOwnProperty(i)) {
+            continue;
+        }
+
+        const external: IExternal = settings.externals[i];
+        files[external.typing] = `node_modules/@types/${external.typing}/index.d.ts`;
+    }
+
+    return files;
+}
+
+/**
+ * Copies typings files into the typings directory.
+ */
+export default function (settings: IGulpSettings): any {
+    "use strict";
+
+    const files: { [i: string]: string } = collectTypingsFiles(settings);
+
+    for (const file of Object.keys(files)) {
+        fs.createReadStream(files[file])
+            .pipe(fs.createWriteStream(`${Constants.folders.typings}/${file}.d.ts`));
+    }
+}
diff --git a/tsconfig.json b/tsconfig.json
index fb059d6..2842c58 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -20,6 +20,7 @@
         "src/tasks/setup/clean.ts",
         "src/tasks/setup/copy.ts",
         "src/tasks/setup/package.ts",
+        "src/tasks/setup/typings.ts",
         "src/tasks/src/tsc.ts",
         "src/tasks/src/tslint.ts",
         "src/tasks/test/run.ts",