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module.exports = fileCompletion
var mkdir = require('mkdirp')
var path = require('path')
var glob = require('glob')
function fileCompletion (root, req, depth, cb) {
if (typeof cb !== 'function') {
cb = depth
depth = Infinity
}
mkdir(root, function (er) {
if (er) return cb(er)
// can be either exactly the req, or a descendent
var pattern = root + '/{' + req + ',' + req + '/**/*}'
var opts = { mark: true, dot: true, maxDepth: depth }
glob(pattern, opts, function (er, files) {
if (er) return cb(er)
return cb(null, (files || []).map(function (f) {
var tail = f.substr(root.length + 1).replace(/^\//, '')
return path.join(req, tail)
}))
})
})
}