feat: added typings

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.1",
   "description": "Config parser module for gemini",
   "main": "lib/index.js",
+  "types": "./typings/index.d.ts",
   "author": "Sergey Tatarintsev <sevinf@yandex-team.ru> (https://github.com/SevInf)",
   "license": "MIT",
   "devDependencies": {

typings/index.d.ts

@@ -0,0 +1,41 @@
+declare module "gemini-configparser" {
+  type PartialConfig = never;
+  type Locator = never;
+  type UnsanitizedRootConfig = any;
+  type UnsanitizedConfigNode = any;
+
+  type Parser<T> = (locator: Locator, config: PartialConfig) => T;
+
+  type RootPrefixes = {
+      envPrefix: string;
+      cliPrefix: string;
+  };
+
+  type OptionParserConfig<T> = {
+      defaultValue: T | ((config: UnsanitizedRootConfig, currNode: UnsanitizedConfigNode) => T);
+      parseCli?(input: string): T;
+      parseEnv?(input: string): T;
+      validate?(value: T, config: UnsanitizedRootConfig, currNode: UnsanitizedConfigNode): void;
+  };
+
+  type MappedOptionParserConfig<S, T> = OptionParserConfig<S> & {
+      map(value: S, config: UnsanitizedRootConfig, currNode: UnsanitizedConfigNode): T;
+  };
+
+  type SectionProperties<T> = { [name in keyof T]: Parser<T[name]> };
+
+  export function option<T>(description: OptionParserConfig<T>): Parser<T>;
+  export function option<S, T>(description: MappedOptionParserConfig<S, T>): Parser<T>;
+  export function section<T>(properties: SectionProperties<T>): Parser<T>;
+
+  type RootParserArg = {
+      options: UnsanitizedRootConfig;
+      env: NodeJS.ProcessEnv;
+      argv: Array<string>;
+  };
+  type RootParser<T> = (arg: RootParserArg) => T;
+  export function root<T>(rootParser: Parser<T>, prefixes: RootPrefixes): RootParser<T>;
+
+  export class MissingOptionError extends Error {}
+  export class UnknownKeysError extends Error {}
+}