Fix #1997 - Bring pyscript stdlib to the PyEditor (#2010)

* Fix #1997 - Bring pyscript stdlib to the PyEditor

pyscript.core/src/core.js

@@ -26,6 +26,9 @@ import { ErrorCode } from "./exceptions.js";
 import { robustFetch as fetch, getText } from "./fetch.js";
 import { hooks, main, worker, codeFor, createFunction } from "./hooks.js";
 
+import stdlib from "./stdlib.js";
+export { stdlib };
+
 // generic helper to disambiguate between custom element and script
 const isScript = ({ tagName }) => tagName === "SCRIPT";
 

pyscript.core/src/plugins/py-editor.js

@@ -1,6 +1,6 @@
 // PyScript py-editor plugin
 import { Hook, XWorker, dedent } from "polyscript/exports";
-import { TYPES } from "../core.js";
+import { TYPES, stdlib } from "../core.js";
 
 const RUN_BUTTON = `<svg style="height:20px;width:20px;vertical-align:-.125em;transform-origin:center;overflow:visible;color:green" viewBox="0 0 384 512" aria-hidden="true" role="img" xmlns="http://www.w3.org/2000/svg"><g transform="translate(192 256)" transform-origin="96 0"><g transform="translate(0,0) scale(1,1)"><path d="M361 215C375.3 223.8 384 239.3 384 256C384 272.7 375.3 288.2 361 296.1L73.03 472.1C58.21 482 39.66 482.4 24.52 473.9C9.377 465.4 0 449.4 0 432V80C0 62.64 9.377 46.63 24.52 38.13C39.66 29.64 58.21 29.99 73.03 39.04L361 215z" fill="currentColor" transform="translate(-192 -256)"></path></g></g></svg>`;
 
@@ -8,9 +8,11 @@ let id = 0;
 const getID = (type) => `${type}-editor-${id++}`;
 
 const envs = new Map();
+const configs = new Map();
 
 const hooks = {
     worker: {
+        codeBeforeRun: () => stdlib,
         // works on both Pyodide and MicroPython
         onReady: ({ runAsync, io }, { sync }) => {
             io.stdout = (line) => sync.write(line);
@@ -32,9 +34,17 @@ async function execute({ currentTarget }) {
 
     if (!envs.has(env)) {
         const srcLink = URL.createObjectURL(new Blob([""]));
-        const xworker = XWorker.call(new Hook(null, hooks), srcLink, {
-            type: this.interpreter,
-        });
+        const details = { type: this.interpreter };
+        const { config } = this;
+        if (config) {
+            details.configURL = config;
+            const { parse } = config.endsWith(".toml")
+                ? await import(/* webpackIgnore: true */ "../3rd-party/toml.js")
+                : JSON;
+            details.config = parse(await fetch(config).then((r) => r.text()));
+        }
+
+        const xworker = XWorker.call(new Hook(null, hooks), srcLink, details);
 
         const { sync } = xworker;
         const { promise, resolve } = Promise.withResolvers();
@@ -138,13 +148,28 @@ const init = async (script, type, interpreter) => {
     ]);
 
     const isSetup = script.hasAttribute("setup");
+    const hasConfig = script.hasAttribute("config");
     const env = `${interpreter}-${script.getAttribute("env") || getID(type)}`;
+
+    if (hasConfig && configs.has(env)) {
+        throw new SyntaxError(
+            configs.get(env)
+                ? `duplicated config for env: ${env}`
+                : `unable to add a config to the env: ${env}`,
+        );
+    }
+
+    configs.set(env, hasConfig);
+
     const source = script.src
         ? await fetch(script.src).then((b) => b.text())
         : script.textContent;
     const context = {
         interpreter,
         env,
+        config:
+            hasConfig &&
+            new URL(script.getAttribute("config"), location.href).href,
         get pySrc() {
             return isSetup ? source : editor.state.doc.toString();
         },
@@ -225,7 +250,7 @@ const resetTimeout = () => {
 };
 
 // triggered both ASAP on the living DOM and via MutationObserver later
-const pyEditor = async () => {
+const pyEditor = () => {
     if (timeout) return;
     timeout = setTimeout(resetTimeout, 250);
     for (const [type, interpreter] of TYPES) {