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'use strict';
var has = require('has');
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 has(data, x) && versionIncluded(nodeVersion, data[x]);
};
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