fix: always ensure micropip and ipython are loaded by loadPyodide

Instead of complex fallback mechanisms, guarantee that micropip and ipython
are always included in the packages list passed to loadPyodide(), regardless
of what custom package list is provided. This prevents CI failures due to
missing packages while maintaining the optimized parallel loading approach.

Removes complex fallback error handling since the packages will always be
available from the initial load.

Author: rgbkrk

packages/pyodide-runtime-agent/src/pyodide-worker.ts

@@ -65,7 +65,16 @@ async function initializePyodide(
 
   // Get cache configuration and packages to load
   const { packageCacheDir } = getCacheConfig();
-  const packagesForInit = packagesToLoad || getEssentialPackages();
+  const basePackages = packagesToLoad || getEssentialPackages();
+
+  // Always ensure micropip and ipython are included for core functionality
+  const packagesForInit = Array.from(
+    new Set([
+      "micropip",
+      "ipython",
+      ...basePackages,
+    ]),
+  );
 
   self.postMessage({
     type: "log",
@@ -121,65 +130,18 @@ async function setupIPythonEnvironment(): Promise<void> {
     data: "Loading IPython environment from bootstrap file",
   });
 
-  try {
-    // Get the Python bootstrap code
-    const pythonBootstrap = await fetch(
-      new URL("./ipython-setup.py", import.meta.url),
-    ).then((response) => response.text());
-
-    // Execute the bootstrap code
-    await pyodide!.runPythonAsync(pythonBootstrap);
-
-    self.postMessage({
-      type: "log",
-      data: "IPython environment loaded successfully",
-    });
-  } catch (error) {
-    // If IPython setup fails, try to install it as a fallback
-    self.postMessage({
-      type: "log",
-      data: `IPython setup failed: ${error}, attempting fallback installation`,
-    });
-
-    try {
-      // First load micropip using pyodide.loadPackage
-      self.postMessage({
-        type: "log",
-        data: "Loading micropip for fallback installation",
-      });
-
-      await pyodide!.loadPackage(["micropip"]);
+  // Get the Python bootstrap code
+  const pythonBootstrap = await fetch(
+    new URL("./ipython-setup.py", import.meta.url),
+  ).then((response) => response.text());
 
-      // Then use micropip to install IPython
-      await pyodide!.runPythonAsync(`
-        import micropip
-        await micropip.install("ipython")
-      `);
+  // Execute the bootstrap code
+  await pyodide!.runPythonAsync(pythonBootstrap);
 
-      self.postMessage({
-        type: "log",
-        data: "IPython installed via micropip fallback",
-      });
-
-      // Retry the bootstrap setup
-      const pythonBootstrap = await fetch(
-        new URL("./ipython-setup.py", import.meta.url),
-      ).then((response) => response.text());
-
-      await pyodide!.runPythonAsync(pythonBootstrap);
-
-      self.postMessage({
-        type: "log",
-        data: "IPython environment loaded successfully after fallback",
-      });
-    } catch (fallbackError) {
-      self.postMessage({
-        type: "error",
-        data: `Failed to set up IPython environment: ${fallbackError}`,
-      });
-      throw fallbackError;
-    }
-  }
+  self.postMessage({
+    type: "log",
+    data: "IPython environment loaded successfully",
+  });
 }
 
 /**