nEngine/apps/editor/src/shim/path.ts

// Renderer shim for `node:path` (dev-app-proven): pure string path math so the
// `@nengine/core` barrel resolves in the renderer build.
export function isAbsolute(p: string): boolean {
  return p.startsWith("/");
}

export function resolve(...segments: string[]): string {
  const parts: string[] = [];
  for (const segment of segments) {
    if (segment.length === 0) continue;
    if (segment.startsWith("/")) {
      parts.length = 0;
    }
    parts.push(...segment.split("/"));
  }
  const out: string[] = [];
  for (const part of parts) {
    if (part === "" || part === ".") continue;
    if (part === "..") {
      out.pop();
    } else {
      out.push(part);
    }
  }
  return "/" + out.join("/");
}

export function join(...segments: string[]): string {
  return resolve(...segments);
}

export function basename(p: string, suffix?: string): string {
  const name = p.split("/").filter((s) => s.length > 0).pop() ?? "";
  if (suffix && name.endsWith(suffix)) {
    return name.slice(0, -suffix.length);
  }
  return name;
}

export function extname(p: string): string {
  const name = basename(p);
  const idx = name.lastIndexOf(".");
  return idx > 0 ? name.slice(idx) : "";
}

export function dirname(p: string): string {
  const idx = p.lastIndexOf("/");
  return idx > 0 ? p.slice(0, idx) : "/";
}