'use strict';
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var has = require('has');
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function specifierIncluded(current, specifier) {
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var nodeParts = current.split('.');
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var parts = specifier.split(' ');
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var op = parts.length > 1 ? parts[0] : '=';
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var versionParts = (parts.length > 1 ? parts[1] : parts[0]).split('.');
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for (var i = 0; i < 3; ++i) {
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var cur = parseInt(nodeParts[i] || 0, 10);
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var ver = parseInt(versionParts[i] || 0, 10);
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if (cur === ver) {
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continue; // eslint-disable-line no-restricted-syntax, no-continue
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}
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if (op === '<') {
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return cur < ver;
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}
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if (op === '>=') {
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return cur >= ver;
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}
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return false;
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}
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return op === '>=';
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}
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function matchesRange(current, range) {
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var specifiers = range.split(/ ?&& ?/);
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if (specifiers.length === 0) {
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return false;
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}
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for (var i = 0; i < specifiers.length; ++i) {
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if (!specifierIncluded(current, specifiers[i])) {
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return false;
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}
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}
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return true;
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}
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function versionIncluded(nodeVersion, specifierValue) {
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if (typeof specifierValue === 'boolean') {
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return specifierValue;
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}
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var current = typeof nodeVersion === 'undefined'
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? process.versions && process.versions.node
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: nodeVersion;
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if (typeof current !== 'string') {
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throw new TypeError(typeof nodeVersion === 'undefined' ? 'Unable to determine current node version' : 'If provided, a valid node version is required');
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}
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if (specifierValue && typeof specifierValue === 'object') {
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for (var i = 0; i < specifierValue.length; ++i) {
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if (matchesRange(current, specifierValue[i])) {
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return true;
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}
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}
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return false;
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}
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return matchesRange(current, specifierValue);
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}
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var data = require('./core.json');
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module.exports = function isCore(x, nodeVersion) {
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return has(data, x) && versionIncluded(nodeVersion, data[x]);
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};
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