Add TypeScript definition (#9)

index.d.ts

@@ -0,0 +1,60 @@
+declare namespace globalDirectories {
+	interface GlobalDirectories {
+		/**
+		Directory with globally installed packages.
+
+		Equivalent to `npm root --global`.
+		*/
+		readonly packages: string;
+
+		/**
+		Directory with globally installed binaries.
+
+		Equivalent to `npm bin --global`.
+		*/
+		readonly binaries: string;
+
+		/**
+		Directory with directories for packages and binaries. You probably want either of the above.
+
+		Equivalent to `npm prefix --global`.
+		*/
+		readonly prefix: string;
+	}
+}
+
+declare const globalDirectories: {
+	/**
+	Get the directory of globally installed packages and binaries.
+
+	@example
+	```
+	import * as globalDirectories from 'global-dirs';
+
+	console.log(globalDirectories.npm.prefix);
+	//=> '/usr/local'
+
+	console.log(globalDirectories.npm.packages);
+	//=> '/usr/local/lib/node_modules'
+	```
+	*/
+	readonly npm: globalDirectories.GlobalDirectories;
+
+	/**
+	Get the directory of globally installed packages and binaries.
+
+	@example
+	```
+	import * as globalDirectories from 'global-dirs';
+
+	console.log(globalDirectories.npm.binaries);
+	//=> '/usr/local/bin'
+
+	console.log(globalDirectories.yarn.packages);
+	//=> '/Users/sindresorhus/.config/yarn/global/node_modules'
+	```
+	*/
+	readonly yarn: globalDirectories.GlobalDirectories;
+}
+
+export = globalDirectories;

index.test-d.ts

@@ -0,0 +1,9 @@
+import {expectType} from 'tsd';
+import globalDirectories = require('.');
+
+expectType<string>(globalDirectories.npm.prefix);
+expectType<string>(globalDirectories.npm.packages);
+expectType<string>(globalDirectories.npm.binaries);
+expectType<string>(globalDirectories.yarn.prefix);
+expectType<string>(globalDirectories.yarn.packages);
+expectType<string>(globalDirectories.yarn.binaries);

package.json

@@ -13,10 +13,11 @@
 		"node": ">=8"
 	},
 	"scripts": {
-		"test": "xo && ava"
+		"test": "xo && ava && tsd"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"global",
@@ -47,6 +48,7 @@
 	"devDependencies": {
 		"ava": "^1.4.1",
 		"execa": "^1.0.0",
+		"tsd": "^0.7.2",
 		"xo": "^0.24.0"
 	}
 }

readme.md

@@ -15,25 +15,25 @@ $ npm install global-dirs
 ## Usage
 
 ```js
-const globalDirs = require('global-dirs');
+const globalDirectories = require('global-dirs');
 
-console.log(globalDirs.npm.prefix);
+console.log(globalDirectories.npm.prefix);
 //=> '/usr/local'
 
-console.log(globalDirs.npm.packages);
+console.log(globalDirectories.npm.packages);
 //=> '/usr/local/lib/node_modules'
 
-console.log(globalDirs.npm.binaries);
+console.log(globalDirectories.npm.binaries);
 //=> '/usr/local/bin'
 
-console.log(globalDirs.yarn.packages);
+console.log(globalDirectories.yarn.packages);
 //=> '/Users/sindresorhus/.config/yarn/global/node_modules'
 ```
 
 
 ## API
 
-### globalDirs
+### globalDirectories
 
 #### npm
 #### yarn

test.js

@@ -1,27 +1,27 @@
 import test from 'ava';
 import execa from 'execa';
-import globalDirs from '.';
+import globalDirectories from '.';
 
-console.log(globalDirs);
+console.log(globalDirectories);
 
 const npm = arguments_ => execa.stdout('npm', arguments_);
 
 test('npm.prefix', async t => {
-	t.is(globalDirs.npm.prefix, await npm(['prefix', '--global']));
+	t.is(globalDirectories.npm.prefix, await npm(['prefix', '--global']));
 });
 
 test('npm.packages', async t => {
-	t.is(globalDirs.npm.packages, await npm(['root', '--global']));
+	t.is(globalDirectories.npm.packages, await npm(['root', '--global']));
 });
 
 test('npm.binaries', async t => {
-	t.is(globalDirs.npm.binaries, await npm(['bin', '--global']));
+	t.is(globalDirectories.npm.binaries, await npm(['bin', '--global']));
 });
 
 test('yarn', async t => {
 	await npm(['install', '--global', 'yarn']);
-	t.truthy(globalDirs.yarn);
-	t.truthy(globalDirs.yarn.prefix);
-	t.truthy(globalDirs.yarn.packages);
-	t.truthy(globalDirs.yarn.binaries);
+	t.truthy(globalDirectories.yarn);
+	t.truthy(globalDirectories.yarn.prefix);
+	t.truthy(globalDirectories.yarn.packages);
+	t.truthy(globalDirectories.yarn.binaries);
 });