Allow user to pass in package URL for package reading

estest/index.js

@@ -13,6 +13,7 @@ meow(
 		  🌈 unicorns 🌈
 	`,
 	{
+		importMeta: import.meta,
 		flags: {
 			rainbow: {
 				type: 'boolean',

index.d.ts

@@ -27,6 +27,11 @@ type AnyFlag = StringFlag | BooleanFlag | NumberFlag;
 type AnyFlags = Record<string, AnyFlag>;
 
 export interface Options<Flags extends AnyFlags> {
+	/**
+	Pass in [`import.meta`](https://nodejs.org/dist/latest/docs/api/esm.html#esm_import_meta). This is used to find the correct package.json file.
+	*/
+	readonly importMeta: ImportMeta;
+
 	/**
 	Define argument flags.
 
@@ -151,6 +156,7 @@ export interface Options<Flags extends AnyFlags> {
 			$ foo
 			🌈 unicorns✨🌈
 	`, {
+		importMeta: import.meta,
 		booleanDefault: undefined,
 		flags: {
 			rainbow: {
@@ -288,6 +294,7 @@ const cli = meow(`
 	  $ foo unicorns --rainbow
 	  🌈 unicorns 🌈
 `, {
+	importMeta: import.meta,
 	flags: {
 		rainbow: {
 			type: 'boolean',

index.js

@@ -1,3 +1,5 @@
+import {dirname} from 'node:path';
+import {fileURLToPath} from 'node:url';
 import buildParserOptions from 'minimist-options';
 import parseArguments from 'yargs-parser';
 import camelCaseKeys from 'camelcase-keys';
@@ -97,13 +99,18 @@ const validateFlags = (flags, options) => {
 	}
 };
 
-const meow = (helpText, options) => {
+const meow = (helpText, options = {}) => {
 	if (typeof helpText !== 'string') {
 		options = helpText;
 		helpText = '';
 	}
 
+	if (!(options.importMeta && options.importMeta.url)) {
+		throw new TypeError('The `importMeta` option is required. Its value must be `import.meta`.');
+	}
+
 	const foundPackage = readPackageUpSync({
+		cwd: dirname(fileURLToPath(options.importMeta.url)),
 		normalize: false
 	});
 

index.test-d.ts

@@ -2,43 +2,46 @@ import {expectAssignable, expectType} from 'tsd';
 import {PackageJson} from 'type-fest';
 import meow, {Result} from './index.js';
 
+const importMeta = import.meta;
+
 expectType<Result<never>>(meow('Help text'));
-expectType<Result<never>>(meow('Help text', {hardRejection: false}));
+expectType<Result<never>>(meow('Help text', {importMeta, hardRejection: false}));
 expectAssignable<{flags: {foo: number}}>(
-	meow({flags: {foo: {type: 'number', isRequired: true}}})
+	meow({importMeta: import.meta, flags: {foo: {type: 'number', isRequired: true}}})
 );
 expectAssignable<{flags: {foo: string}}>(
-	meow({flags: {foo: {type: 'string', isRequired: true}}})
+	meow({importMeta, flags: {foo: {type: 'string', isRequired: true}}})
 );
 expectAssignable<{flags: {foo: boolean}}>(
-	meow({flags: {foo: {type: 'boolean', isRequired: true}}})
+	meow({importMeta, flags: {foo: {type: 'boolean', isRequired: true}}})
 );
 expectAssignable<{flags: {foo: number | undefined}}>(
-	meow({flags: {foo: {type: 'number'}}})
+	meow({importMeta, flags: {foo: {type: 'number'}}})
 );
 expectAssignable<{flags: {foo: string | undefined}}>(
-	meow({flags: {foo: {type: 'string'}}})
+	meow({importMeta, flags: {foo: {type: 'string'}}})
 );
 expectAssignable<{flags: {foo: boolean | undefined}}>(
-	meow({flags: {foo: {type: 'boolean'}}})
+	meow({importMeta, flags: {foo: {type: 'boolean'}}})
 );
-expectType<Result<never>>(meow({description: 'foo'}));
-expectType<Result<never>>(meow({description: false}));
-expectType<Result<never>>(meow({help: 'foo'}));
-expectType<Result<never>>(meow({help: false}));
-expectType<Result<never>>(meow({version: 'foo'}));
-expectType<Result<never>>(meow({version: false}));
-expectType<Result<never>>(meow({autoHelp: false}));
-expectType<Result<never>>(meow({autoVersion: false}));
-expectType<Result<never>>(meow({pkg: {foo: 'bar'}}));
-expectType<Result<never>>(meow({argv: ['foo', 'bar']}));
-expectType<Result<never>>(meow({inferType: true}));
-expectType<Result<never>>(meow({booleanDefault: true}));
-expectType<Result<never>>(meow({booleanDefault: null}));
-expectType<Result<never>>(meow({booleanDefault: undefined}));
-expectType<Result<never>>(meow({hardRejection: false}));
+expectType<Result<never>>(meow({importMeta, description: 'foo'}));
+expectType<Result<never>>(meow({importMeta, description: false}));
+expectType<Result<never>>(meow({importMeta, help: 'foo'}));
+expectType<Result<never>>(meow({importMeta, help: false}));
+expectType<Result<never>>(meow({importMeta, version: 'foo'}));
+expectType<Result<never>>(meow({importMeta, version: false}));
+expectType<Result<never>>(meow({importMeta, autoHelp: false}));
+expectType<Result<never>>(meow({importMeta, autoVersion: false}));
+expectType<Result<never>>(meow({importMeta, pkg: {foo: 'bar'}}));
+expectType<Result<never>>(meow({importMeta, argv: ['foo', 'bar']}));
+expectType<Result<never>>(meow({importMeta, inferType: true}));
+expectType<Result<never>>(meow({importMeta, booleanDefault: true}));
+expectType<Result<never>>(meow({importMeta, booleanDefault: null}));
+expectType<Result<never>>(meow({importMeta, booleanDefault: undefined}));
+expectType<Result<never>>(meow({importMeta, hardRejection: false}));
 
 const result = meow('Help text', {
+	importMeta,
 	flags: {
 		foo: {type: 'boolean', alias: 'f'},
 		'foo-bar': {type: 'number'},
@@ -66,6 +69,7 @@ result.showHelp(1);
 result.showVersion();
 
 const options = {
+	importMeta,
 	flags: {
 		rainbow: {
 			type: 'boolean',

readme.md

@@ -26,52 +26,11 @@ $ npm install meow
 $ ./foo-app.js unicorns --rainbow
 ```
 
-**CommonJS**
-
 ```js
 #!/usr/bin/env node
-'use strict';
-const meow = require('meow');
-const foo = require('.');
-
-const cli = meow(`
-	Usage
-	  $ foo <input>
-
-	Options
-	  --rainbow, -r  Include a rainbow
-
-	Examples
-	  $ foo unicorns --rainbow
-	  🌈 unicorns 🌈
-`, {
-	flags: {
-		rainbow: {
-			type: 'boolean',
-			alias: 'r'
-		}
-	}
-});
-/*
-{
-	input: ['unicorns'],
-	flags: {rainbow: true},
-	...
-}
-*/
-
-foo(cli.input[0], cli.flags);
-```
-
-**ES Modules**
-
-```js
-#!/usr/bin/env node
-import {createRequire} from 'module';
+import meow from 'meow';
 import foo from './lib/index.js';
 
-const meow = createRequire(import.meta.url)('meow');
-
 const cli = meow(`
 	Usage
 	  $ foo <input>
@@ -83,6 +42,7 @@ const cli = meow(`
 	  $ foo unicorns --rainbow
 	  🌈 unicorns 🌈
 `, {
+	importMeta: import.meta,
 	flags: {
 		rainbow: {
 			type: 'boolean',
@@ -126,6 +86,12 @@ Shortcut for the `help` option.
 
 Type: `object`
 
+##### importMeta
+
+Type: `object`
+
+Pass in [`import.meta`](https://nodejs.org/dist/latest/docs/api/esm.html#esm_import_meta). This is used to find the correct package.json file.
+
 ##### flags
 
 Type: `object`
@@ -253,7 +219,7 @@ __Caution: Explicitly specifying `undefined` for `booleanDefault` has different
 Example:
 
 ```js
-const meow = require('meow');
+const meow from 'meow';
 
 const cli = meow(`
 	Usage
@@ -268,6 +234,7 @@ const cli = meow(`
 	  $ foo
 	  🌈 unicorns✨🌈
 `, {
+	importMeta: import.meta,
 	booleanDefault: undefined,
 	flags: {
 		rainbow: {

test/fixtures/fixture-allow-unknown-flags.js

@@ -2,6 +2,7 @@
 import meow from '../../index.js';
 
 const cli = meow({
+	importMeta: import.meta,
 	description: 'Custom description',
 	help: `
 		Usage

test/fixtures/fixture-required-function.js

@@ -2,6 +2,7 @@
 import meow from '../../index.js';
 
 const cli = meow({
+	importMeta: import.meta,
 	description: 'Custom description',
 	help: `
 		Usage

test/fixtures/fixture-required-multiple.js

@@ -2,6 +2,7 @@
 import meow from '../../index.js';
 
 const cli = meow({
+	importMeta: import.meta,
 	description: 'Custom description',
 	help: `
 		Usage

test/fixtures/fixture-required.js

@@ -3,6 +3,7 @@
 import meow from '../../index.js';
 
 const cli = meow({
+	importMeta: import.meta,
 	description: 'Custom description',
 	help: `
 		Usage

test/fixtures/fixture.js

@@ -2,6 +2,7 @@
 import meow from '../../index.js';
 
 const cli = meow({
+	importMeta: import.meta,
 	description: 'Custom description',
 	help: `
 		Usage