metarize/dist/debug.js

A lightweight, ESM-compatible TypeScript metadata library for creating and inspecting decorators with zero dependencies

/**
 * Simplified debug utility that provides basic namespace and conditional output functionality
 */
/**
 * Get enabled namespaces from environment variables
 */
function getEnabledNamespaces() {
    if (typeof process !== 'undefined' && process.env && process.env.DEBUG) {
        return process.env.DEBUG.split(',').map(ns => ns.trim());
    }
    return [];
}
// We'll check the environment variables each time to support testing
function getNamespaces() {
    return getEnabledNamespaces();
}
/**
 * Check if a namespace is enabled
 * @param namespace Namespace
 */
function isNamespaceEnabled(namespace) {
    const namespaces = getNamespaces();
    if (namespaces.length === 0)
        return false;
    return namespaces.some((ns) => ns === '*' ||
        ns === namespace ||
        (ns.endsWith('*') && namespace.startsWith(ns.slice(0, -1))) ||
        namespace.startsWith(ns + ':'));
}
/**
 * Create a debugger instance
 * @param namespace Namespace
 */
export function createDebug(namespace) {
    const enabled = isNamespaceEnabled(namespace);
    const debugFn = function (formatter, ...args) {
        if (!debugFn.enabled)
            return;
        const time = new Date().toISOString();
        if (typeof formatter === 'string') {
            console.log(`${time} ${namespace} ${formatter}`, ...args);
        }
        else {
            console.log(`${time} ${namespace}`, formatter, ...args);
        }
    };
    debugFn.enabled = enabled;
    return debugFn;
}
/**
 * Default export for createDebug function
 */
export default createDebug;
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