find-requires's Introduction

find-requires – Find all require() calls.

Made for modules-webmake. Fast esniff based implementation of require calls parser.

Example

foo.js:

var one = require("one");
var two = require("two");
var slp = require("some/long" + "/path");
var wrong = require(cannotTakeThat);

program.js:

var fs = require("fs");
var findRequires = require("find-requires");

var src = fs.readFileSync("foo.js", "utf-8");

console.log(findRequires(src)); // => ['one', 'two', 'some/long/path'];

// or we can get more detailed data with `raw` option:
console.log(findRequires(src, { raw: true })); /* => [
	{ value: 'one', raw: '\'one\'', point: 19, line: 1, column: 19 },
	{ value: 'two', raw: '\'two\'', point: 45, line: 2, column: 19 },
	{ value: 'some/long/path', raw: '\'some/long\' +\n\t\t\t\t\t\t\'/path\'',
		point: 71, line: 3, column: 19  },
	{ raw: 'cannotTakeThat', point: 121, line: 5, column: 21 }
] */

// We can also ensure some specific cases of dynamic requires code with some setup code injection
console.log(
	findRequires("require(__dirname + '/foo.js')", {
		setupCode: `const __dirname = ${ JSON.stringify(__dirname) }`
	})
);

CLI Example

> npm install -g find-requires

Find all requires in a file:

> find-requires file1.js
test1.js:3:LIB + '/test2'
test1.js:4:fs

Find all places the fs module is required: find-requires -m fs $(find . -name '*.js')

Tests

$ npm test

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find-requires's Issues

Module 'undefined' not found.

Simplest test case I could find:

var db = require(
	'../../db'
	);

Given that the db.js is in fact in this location.

find-requires fails to detect requires with new

var notifier = new require("node-notifier")(); Should be valid JavaScript but the require is not found. Works fine if the new is omitted or require is done with two lines like this

var Notifier = require('node-notifier');
notify = new Notifier();

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