feat(framework) Install Python package(s) on flwr install

src/py/flwr/cli/install.py

@@ -16,6 +16,7 @@
 
 
 import shutil
+import subprocess
 import tempfile
 import zipfile
 from io import BytesIO
@@ -192,6 +193,21 @@ def validate_and_install(
         else:
             shutil.copy2(item, install_dir / item.name)
 
+    try:
+        subprocess.run(
+            ["pip", "install", "-e", install_dir, "--no-deps"],
+            capture_output=True,
+            text=True,
+            check=True,
+        )
+    except subprocess.CalledProcessError as e:
+        typer.secho(
+            f"❌ Failed to `pip install` package(s) from {install_dir}:\n{e.stderr}",
+            fg=typer.colors.RED,
+            bold=True,
+        )
+        raise typer.Exit(code=1) from e
+
     typer.secho(
         f"🎊 Successfully installed {project_name} to {install_dir}.",
         fg=typer.colors.GREEN,

src/py/flwr/superexec/deployment.py

@@ -15,7 +15,6 @@
 """Deployment engine executor."""
 
 import subprocess
-import sys
 from logging import ERROR, INFO
 from pathlib import Path
 from typing import Dict, Optional
@@ -131,14 +130,7 @@ def start_run(
         try:
             # Install FAB to flwr dir
             fab_version, fab_id = get_fab_metadata(fab_file)
-            fab_path = install_from_fab(fab_file, None, True)
-
-            # Install FAB Python package
-            subprocess.check_call(
-                [sys.executable, "-m", "pip", "install", "--no-deps", str(fab_path)],
-                stdout=subprocess.DEVNULL,
-                stderr=subprocess.DEVNULL,
-            )
+            install_from_fab(fab_file, None, True)
 
             # Call SuperLink to create run
             run_id: int = self._create_run(fab_id, fab_version, override_config)