feat: GetResponseTypeFromEndpointMethod and GetResponseDataTypeFromEndpointMethod helpers (#32)

Author: gr2m

README.md

@@ -8,6 +8,24 @@
 
 ## Usage
 
+Get response types from endpoint methods
+
+```ts
+import {
+  GetResponseTypeFromEndpointMethod,
+  GetResponseDataTypeFromEndpointMethod,
+} from "@octokit/types";
+import { Octokit } from "@octokit/rest";
+
+const octokit = new Octokit();
+type CreateLabelResponseType = GetResponseType<
+  typeof octokit.issues.createLabel
+>;
+type CreateLabelResponseDataType = GetResponseDataType<
+  typeof octokit.issues.createLabel
+>;
+```
+
 See https://octokit.github.io/types.ts for all exported types
 
 ## Contributing

src/GetResponseTypeFromEndpointMethod.ts

@@ -0,0 +1,9 @@
+type Unwrap<T> = T extends Promise<infer U> ? U : T;
+type AnyFunction = (...args) => any;
+
+export type GetResponseTypeFromEndpointMethod<T extends AnyFunction> = Unwrap<
+  ReturnType<T>
+>;
+export type GetResponseDataTypeFromEndpointMethod<
+  T extends AnyFunction
+> = Unwrap<ReturnType<T>>["data"];

src/index.ts

@@ -16,3 +16,4 @@ export * from "./Signal";
 export * from "./StrategyInterface";
 export * from "./Url";
 export * from "./VERSION";
+export * from "./GetResponseTypeFromEndpointMethod";