fix cids

src/lib/file-id/FileIDComputerWorker.ts

@@ -1,10 +1,16 @@
 import {Piscina} from "piscina";
-import {CID_ALGORITHM_NAMES} from "../hash-compute/MultiHashData";
+import {CidAlgorithm} from "../hash-compute/MultiHashData";
 
 export class FileIDComputerWorker{
     private piscina: Piscina;
 
     constructor(workerPath?:string) {
+        // `WORKER_URL` is the escape hatch the tests have always set — it just
+        // wasn't read. Honour it before falling back to path derivation, which
+        // only works for a caller running from `dist/`.
+        if (!workerPath && process.env.WORKER_URL) {
+            workerPath = new URL(process.env.WORKER_URL, `file://${process.cwd()}/`).href;
+        }
         if(!workerPath) {
             // Construct the URL for the current module
             let distFolder = import.meta.dirname;
@@ -25,7 +31,7 @@ export class FileIDComputerWorker{
      * @param algorithms Array of algorithms ('sha256', 'sha1')
      * @returns Array of CIDs (in the order of the algorithms)
      */
-    public async computeCIDs(filePath: string, algorithms: CID_ALGORITHM_NAMES[]): Promise<string[]> {
+    public async computeCIDs(filePath: string, algorithms: CidAlgorithm[]): Promise<string[]> {
         return this.piscina.run({filePath, algorithms});
     }
 }