Complete resolution of Issue #12: Unified filesystem mounting solution

.gitignore

@@ -11,3 +11,7 @@ wheels/
 
 # tmp files
 .tmp
+
+# Node.js dependencies (downloaded during build)
+node_modules/
+package-lock.json

build_hooks.py

@@ -0,0 +1,63 @@
+"""Simple build hook to run npm install for Pyodide bundling."""
+
+import subprocess
+import sys
+from pathlib import Path
+from typing import Any
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+
+class NpmInstallBuildHook(BuildHookInterface):
+    """Build hook that runs npm install to download Pyodide for bundling."""
+
+    PLUGIN_NAME = "custom"
+
+    def initialize(self, version: str, build_data: dict[str, Any]) -> None:
+        """Run npm install to download Pyodide files for bundling."""
+        build_dir = Path(self.root)
+        package_json = build_dir / "package.json"
+        node_modules = build_dir / "node_modules"
+
+        # Check if package.json exists
+        if not package_json.exists():
+            print("⚠ No package.json found - skipping npm install")
+            return
+
+        # Check if node_modules already exists and is populated
+        pyodide_dir = node_modules / "pyodide"
+        if pyodide_dir.exists() and (pyodide_dir / "pyodide.js").exists():
+            print("✓ Pyodide already installed in node_modules")
+            return
+
+        print("📦 Running npm install to download Pyodide for bundling...")
+
+        try:
+            # Run npm install
+            result = subprocess.run(
+                ["npm", "install"],
+                cwd=build_dir,
+                capture_output=True,
+                text=True,
+                timeout=300,  # 5 minute timeout
+            )
+
+            if result.returncode == 0:
+                print("✓ npm install completed successfully")
+                # Verify Pyodide was installed
+                if (pyodide_dir / "pyodide.js").exists():
+                    print("✓ Pyodide files ready for bundling")
+                else:
+                    print("⚠ npm install succeeded but Pyodide files not found")
+            else:
+                print(f"✗ npm install failed with exit code {result.returncode}")
+                if result.stderr:
+                    print(f"Error output: {result.stderr}")
+
+        except subprocess.TimeoutExpired:
+            print("✗ npm install timed out after 5 minutes")
+        except FileNotFoundError:
+            print("✗ npm not found - please ensure Node.js and npm are installed")
+            sys.exit(1)
+        except Exception as e:
+            print(f"✗ npm install failed: {e}")

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "mip-mcp-pyodide-deps",
+  "version": "1.0.0",
+  "description": "Node.js dependencies for MIP-MCP Pyodide execution",
+  "private": true,
+  "scripts": {
+    "postinstall": "echo '✓ Pyodide installed successfully for bundling'"
+  },
+  "dependencies": {
+    "pyodide": "^0.27.7"
+  },
+  "engines": {
+    "node": ">=18.0.0"
+  }
+}

pyproject.toml

@@ -98,6 +98,9 @@ indent-style = "space"
 [tool.hatch.build.targets.wheel]
 packages = ["src/mip_mcp"]
 
+[tool.hatch.build.targets.wheel.hooks.custom]
+path = "build_hooks.py"
+
 [tool.hatch.build.targets.wheel.shared-data]
 "node_modules/pyodide/pyodide.js" = "mip_mcp/pyodide/pyodide.js"
 "node_modules/pyodide/pyodide.asm.js" = "mip_mcp/pyodide/pyodide.asm.js"