feat(typescript): add workaround to make it work with more .plugin() chaining

Author: gr2m

src/index.ts

@@ -1,9 +1,45 @@
 import { Octokit as Core } from "@octokit/core";
 import { createActionAuth } from "@octokit/auth-action";
+import { paginateRest } from "@octokit/plugin-paginate-rest";
 
 import { VERSION } from "./version";
 
-export const Octokit = Core.defaults({
+const CoreWithPlugins = Core.plugin([paginateRest]);
+
+// Workaround for TypeScript bug, see https://github.com/octokit/core.js#a-note-on-typescript
+import {
+  OctokitOptions,
+  OctokitPlugin,
+  ReturnTypeOf,
+  Constructor
+} from "@octokit/core";
+
+class CoreWithPluginsWorkaround extends CoreWithPlugins {
+  static plugin<T extends OctokitPlugin | OctokitPlugin[]>(pluginOrPlugins: T) {
+    const currentPlugins = this.plugins;
+    const newPlugins = Array.isArray(pluginOrPlugins)
+      ? pluginOrPlugins
+      : [pluginOrPlugins];
+
+    const NewOctokit = class extends this {
+      static plugins = currentPlugins.concat(
+        newPlugins.filter(plugin => !currentPlugins.includes(plugin))
+      );
+    };
+
+    return NewOctokit as typeof NewOctokit & Constructor<ReturnTypeOf<T>>;
+  }
+
+  static defaults(defaults: OctokitOptions) {
+    return class OctokitWithDefaults extends this {
+      constructor(options: OctokitOptions = {}) {
+        super(Object.assign({}, defaults, options));
+      }
+    };
+  }
+}
+
+export const Octokit = CoreWithPluginsWorkaround.defaults({
   authStrategy: createActionAuth,
   userAgent: `octokit-action.js/${VERSION}`
 });