feat: config files, readme

src/options.ts

@@ -1,3 +1,5 @@
+import { type } from "arktype";
+
 export interface Options {
 	/**
 	 * Pattern matching files to include in parsing
@@ -66,6 +68,22 @@ export interface Options {
 	emitRegions: boolean;
 }
 
+export const Options = type({
+	include: "string[]",
+	"exclude?": "string[]",
+	"outDir?": "string | null",
+	"fileExtension?": "string",
+	"testName?": "string | null",
+	"templateRoot?": "boolean",
+	"templateHeader?": "string[]",
+	"templateFooter?": "string[]",
+	"format?": '"jest" | "vitest" | "assert"',
+	"onlyGenerateTests?": "boolean",
+	"requireCodeBlock?": "boolean",
+	"includePath?": "boolean",
+	"emitRegions?": "boolean",
+});
+
 export const DEFAULT_OPTIONS: Required<Options> = {
 	include: [],
 	exclude: [],
@@ -81,3 +99,13 @@ export const DEFAULT_OPTIONS: Required<Options> = {
 	includePath: true,
 	emitRegions: true,
 };
+
+export function defineConfig(
+	opts: Partial<Omit<Options, "include">> &
+		Pick<Options, "include">,
+): Options {
+	return {
+		...DEFAULT_OPTIONS,
+		...opts,
+	};
+}