source: frontend/node_modules/is-core-module/index.js

'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; // eslint-disable-line no-restricted-syntax, no-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]);
};