Patch zeroperl-ts so worker WASM load honors custom fetch.

Postinstall updates @6over3/zeroperl-ts and wires the worker to load zeroperl.wasm via Vite ?url.
2026-10-15 18:57:43 +02:00
parent 42f9a3eafc
commit e10341d44b
4 changed files with 84 additions and 4 deletions
@@ -0,0 +1,60 @@
+/**
+ * Patch @6over3/zeroperl-ts@1.0.10 after install.
+ *
+ * Problem: WASM loader treats only `window` + `document` as browser. Module workers have
+ * neither, so it dynamic-imports `node:fs/promises` and fails under Vite.
+ * Custom `fetch` from @uswriting/exiftool is ignored on that branch.
+ *
+ * Fix: use the fetch path when a custom fetch is provided (`Ee() || e`).
+ *
+ * Upstream: https://github.com/6over3/zeroperl-ts
+ *
+ * Re-verify when bumping @6over3/zeroperl-ts: search dist for the ORIGINAL snippets below.
+ */
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const patches = [
+    {
+        relativePath: 'esm/index.js',
+        original: 'if(Ee())a=await(await(e??fetch)(q)).arrayBuffer();',
+        patched: 'if(Ee()||e)a=await(await(e??fetch)(q)).arrayBuffer();'
+    },
+    {
+        relativePath: 'cjs/index.cjs',
+        original: 'if(pe())a=await(await(e??fetch)(w)).arrayBuffer();',
+        patched: 'if(pe()||e)a=await(await(e??fetch)(w)).arrayBuffer();'
+    }
+];
+
+const packageRoot = path.resolve(
+    path.dirname(fileURLToPath(import.meta.url)),
+    '../node_modules/@6over3/zeroperl-ts/dist'
+);
+
+const patchFile = ({ relativePath, original, patched }) => {
+    const filePath = path.join(packageRoot, relativePath);
+
+    if (!fs.existsSync(filePath)) {
+        throw new Error(`patch-zeroperl-worker-fetch: missing ${filePath} (is @6over3/zeroperl-ts installed?)`);
+    }
+
+    const content = fs.readFileSync(filePath, 'utf8');
+
+    if (content.includes(patched)) {
+        return;
+    }
+
+    if (!content.includes(original)) {
+        throw new Error(
+            `patch-zeroperl-worker-fetch: ${relativePath} does not match @6over3/zeroperl-ts@1.0.10; update or remove this script`
+        );
+    }
+
+    fs.writeFileSync(filePath, content.replaceAll(original, patched));
+};
+
+for (const entry of patches) {
+    patchFile(entry);
+}