Add startup testing for Wasm Pinecone build (#1910)

* Only include go-sqlite3 on the relevant binaries

* The driver name is always sqlite3 now

* Update to matrix-org/go-sqlite3-js@e537baa

* Add initial Wasm test harness

* Upgrade go-sqlite3-js

This fixes an error about semicolons in single statements.

* Add browser-like WebSocket API for testing

* Upgrade go-sqlite3-js

This upgrade includes printing panic messages next to stacks.

* Run for all PRs targeting any branch

* Use manual Node caching

* Temporarily run for all pushes

* Use npm ci instead of install

* Use HTTPS auth for repo packages

* Match path style from build.sh

* update utp

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

test/wasm/index.js

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const fs = require('fs');
+const path = require('path');
+const childProcess = require('child_process');
+
+(async function() {
+    // sql.js
+    const initSqlJs = require('sql.js');
+    await initSqlJs().then(SQL => {
+        global._go_sqlite = SQL;
+        console.log("Loaded sqlite")
+    });
+    // dendritejs expects to write to `/idb` so we create that here
+    // Since this is testing only, we use the default in-memory FS
+    global._go_sqlite.FS.mkdir("/idb");
+
+    // WebSocket
+    const WebSocket = require('isomorphic-ws');
+    global.WebSocket = WebSocket;
+
+    // Load the generic Go Wasm exec helper inline to trigger built-in run call
+    // This approach avoids copying `wasm_exec.js` into the repo, which is nice
+    // to aim for since it can differ between Go versions.
+    const goRoot = await new Promise((resolve, reject) => {
+        childProcess.execFile('go', ['env', 'GOROOT'], (err, out) => {
+            if (err) {
+                reject("Can't find go");
+            }
+            resolve(out.trim());
+        });
+    });
+    const execPath = path.join(goRoot, 'misc/wasm/wasm_exec.js');
+    const execCode = fs.readFileSync(execPath, 'utf8');
+    eval(execCode);
+})();