is-require 
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Tests whether an JavaScript AST node is likely to be a valid require
call.
Mostly for convenience, seeing as I've had to copy/paste it a few times now.
Usage
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isRequire = require('is-require')([name])
Returns a function which tests AST nodes for require
calls. You can supply
your own function name to name
to use something other than require.
isRequire(node)
Tests an AST node to see if it is a require
call.
var isImports = require('is-require')('imports')
var isRequire = require('is-require')()
var esprima = require('esprima')
var astw = require('astw')
var fs = require('fs')
var src = fs.readFileSync('some-file.js', 'utf8')
var ast = esprima.parse(src)
var walk = astw(ast)
walk(function(node) {
if (!isRequire(node)) return
})
walk(function(node) {
if (!isImports(node)) return
})
License
MIT. See LICENSE.md for details.