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- 'use strict';
- var hasOwn = require('hasown');
- function specifierIncluded(current, specifier) {
- var nodeParts = current.split('.');
- var parts = specifier.split(' ');
- var op = parts.length > 1 ? parts[0] : '=';
- var versionParts = (parts.length > 1 ? parts[1] : parts[0]).split('.');
- for (var i = 0; i < 3; ++i) {
- var cur = parseInt(nodeParts[i] || 0, 10);
- var ver = parseInt(versionParts[i] || 0, 10);
- if (cur === ver) {
- continue;
- }
- if (op === '<') {
- return cur < ver;
- }
- if (op === '>=') {
- return cur >= ver;
- }
- return false;
- }
- return op === '>=';
- }
- function matchesRange(current, range) {
- var specifiers = range.split(/ ?&& ?/);
- if (specifiers.length === 0) {
- return false;
- }
- for (var i = 0; i < specifiers.length; ++i) {
- if (!specifierIncluded(current, specifiers[i])) {
- return false;
- }
- }
- return true;
- }
- function versionIncluded(nodeVersion, specifierValue) {
- if (typeof specifierValue === 'boolean') {
- return specifierValue;
- }
- var current = typeof nodeVersion === 'undefined'
- ? process.versions && process.versions.node
- : nodeVersion;
- if (typeof current !== 'string') {
- throw new TypeError(typeof nodeVersion === 'undefined' ? 'Unable to determine current node version' : 'If provided, a valid node version is required');
- }
- if (specifierValue && typeof specifierValue === 'object') {
- for (var i = 0; i < specifierValue.length; ++i) {
- if (matchesRange(current, specifierValue[i])) {
- return true;
- }
- }
- return false;
- }
- return matchesRange(current, specifierValue);
- }
- var data = require('./core.json');
- module.exports = function isCore(x, nodeVersion) {
- return hasOwn(data, x) && versionIncluded(nodeVersion, data[x]);
- };
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