'use strict' const fs = require('graceful-fs') const log = require('npmlog') function list (gyp, args, callback) { var devDir = gyp.devDir log.verbose('list', 'using node-gyp dir:', devDir) fs.readdir(devDir, onreaddir) function onreaddir (err, versions) { if (err && err.code !== 'ENOENT') { return callback(err) } if (Array.isArray(versions)) { versions = versions.filter(function (v) { return v !== 'current' }) } else { versions = [] } callback(null, versions) } } module.exports = list module.exports.usage = 'Prints a listing of the currently installed node development files'