node-semvers/dist/esm/parseExpression/index.js

Utilities for managing versions of node including looking up codenames

// biome-ignore lint/suspicious/noShadowRestrictedNames: Legacy
import isNaN from '../lib/isNaN.js';
import isLatestFn from './isLatestFn.js';
import isLTSFn from './isLTSFn.js';
import schedulesLatest from './schedulesLatest.js';
export default function parseExpression(expression, now) {
    if (expression[0] === 'v' && !isNaN(+expression.substr(1, 1))) expression = expression.substr(1);
    if (expression.substr(0, 4) === 'lts/') expression = expression.substr(4) === '*' ? 'lts' : expression.substr(4);
    if (expression === 'stable') expression = 'lts';
    if (typeof expression === 'number') return {
        major: expression
    };
    if (~expression.indexOf('.')) {
        const parts = expression.split('.');
        if (parts.length === 1) return isNaN(+parts[0]) ? null : {
            major: +parts[0]
        };
        if (parts.length === 2) return isNaN(+parts[0]) && isNaN(+parts[1]) ? null : {
            major: +parts[0],
            minor: +parts[1]
        };
        return isNaN(+parts[0]) && isNaN(+parts[1]) && isNaN(+parts[2]) ? null : {
            major: +parts[0],
            minor: +parts[1],
            patch: +parts[2]
        };
    }
    if (!isNaN(+expression)) return {
        major: +expression
    };
    if (expression === 'lts') {
        const lts = schedulesLatest(this.schedules, isLTSFn(now));
        return lts ? {
            name: lts.name
        } : null;
    }
    if (expression === 'latest') {
        const latest = schedulesLatest(this.schedules, isLatestFn(now));
        return latest ? {
            name: latest.name
        } : null;
    }
    return {
        codename: expression.toLowerCase()
    };
}