sync-rules/dist/utils/paths.js

CLI tool to synchronize AI coding assistant rule files between projects.

import { homedir } from "node:os";
import { isAbsolute, relative, resolve } from "node:path";
/**
 * Normalize a path by expanding `~` and resolving to an absolute path.
 * No boundary or permission checks are performed here.
 * @param input - The path to normalize (supports ~ for home directory)
 */
export function normalizePath(input) {
    const expanded = input.startsWith("~")
        ? input.replace(/^~/u, homedir())
        : input;
    return resolve(expanded);
}
/**
 * Resolve a relative path inside a base directory, rejecting escapes.
 * - Rejects absolute input paths explicitly (e.g. "/etc/passwd").
 * - Uses path.resolve + path.relative to ensure the final path stays within baseDir.
 */
export function resolveInside(baseDir, relPath) {
    const full = resolve(baseDir, relPath);
    const rel = relative(baseDir, full);
    if (rel.startsWith("..") || isAbsolute(relPath)) {
        throw new Error(`Refusing to write outside ${baseDir}: ${relPath}`);
    }
    return full;
}