Add ImageGeneratorsHub as submodule and update installation scripts

- Add ImageGeneratorsHub as git submodule
- Update install.sh to initialize submodules instead of cloning separately
- Update install-oneliner.sh to clone with --recursive flag
- Update service manager to properly handle ImageGeneratorsHub submodule
- Fix ImageGeneratorsHub path to be within needle home directory

Author: merfanian

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "ImageGeneratorsHub"]
+	path = ImageGeneratorsHub
+	url = git@github.com:UIC-InDeXLab/ImageGeneratorsHub.git

ImageGeneratorsHub

@@ -111,10 +111,10 @@ print_success "Selected ${CONFIG_MODE} configuration"
 TEMP_DIR=$(mktemp -d)
 print_status "Using temporary directory: $TEMP_DIR"
 
-# Clone repository
-print_status "Cloning Needle repository..."
+# Clone repository with submodules
+print_status "Cloning Needle repository with submodules..."
 cd "$TEMP_DIR"
-git clone https://github.com/UIC-InDeXLab/Needle.git
+git clone --recursive https://github.com/UIC-InDeXLab/Needle.git
 cd Needle
 
 # Make install script executable and run it

install-oneliner.sh

@@ -165,19 +165,22 @@ else
     fi
 fi
 
-### Step 3: Clone ImageGeneratorsHub if needed
-print_status "Setting up ImageGeneratorsHub..."
-
-if [ -d "${IMAGE_GEN_HUB_DIR}" ]; then
-    print_warning "ImageGeneratorsHub directory already exists. Updating..."
-    cd "${IMAGE_GEN_HUB_DIR}"
-    git pull origin main
-    cd "${NEEDLE_DIR}"
+### Step 3: Initialize and update submodules
+print_status "Setting up ImageGeneratorsHub submodule..."
+
+# Initialize and update submodules
+print_status "Initializing git submodules..."
+git submodule init
+git submodule update --recursive
+
+# Check if ImageGeneratorsHub submodule is properly initialized
+if [ -d "ImageGeneratorsHub" ] && [ -f "ImageGeneratorsHub/.git" ]; then
+    print_success "ImageGeneratorsHub submodule initialized"
+    IMAGE_GEN_HUB_DIR="${NEEDLE_DIR}/ImageGeneratorsHub"
+    print_status "ImageGeneratorsHub directory: $IMAGE_GEN_HUB_DIR"
 else
-    print_status "Cloning ImageGeneratorsHub repository..."
-    cd "${NEEDLE_DIR}/.."
-    git clone git@github.com:UIC-InDeXLab/ImageGeneratorsHub.git
-    cd "${NEEDLE_DIR}"
+    print_error "Failed to initialize ImageGeneratorsHub submodule"
+    exit 1
 fi
 
 ### Step 4: Setup Backend Virtual Environment

install.sh

@@ -49,7 +49,7 @@ def _get_service_pid(self, pid_file: Path) -> Optional[int]:
         except (OSError, ValueError, FileNotFoundError):
             return None
 
-    def _start_virtual_env_service(self, service_name: str, command: list, pid_file: Path, log_file: Path, working_dir: Path = None):
+    def _start_virtual_env_service(self, service_name: str, command: list, pid_file: Path, log_file: Path, working_dir: Path = None, env_vars: dict = None):
         """Start a virtual environment service."""
         if self._is_service_running(pid_file):
             typer.echo(f"{service_name} is already running (PID: {self._get_service_pid(pid_file)})")
@@ -61,13 +61,19 @@ def _start_virtual_env_service(self, service_name: str, command: list, pid_file:
         # Use provided working directory or default to needle_home
         cwd = working_dir if working_dir else self.needle_home
 
+        # Prepare environment variables
+        env = os.environ.copy()
+        if env_vars:
+            env.update(env_vars)
+        
         # Start service in background
         with open(log_file, 'w') as log_f:
             process = subprocess.Popen(
                 command,
                 stdout=log_f,
                 stderr=subprocess.STDOUT,
-                cwd=cwd
+                cwd=cwd,
+                env=env
             )
 
         # Save PID
@@ -118,17 +124,17 @@ def start_services(self):
         time.sleep(15)
 
         # Start image generator hub
-        if (self.needle_home.parent / "ImageGeneratorsHub").exists():
+        image_gen_dir = self.needle_home / "ImageGeneratorsHub"
+        if image_gen_dir.exists() and (image_gen_dir / ".venv").exists():
             typer.echo("Starting image-generator-hub...")
-            image_gen_dir = self.needle_home.parent / "ImageGeneratorsHub"
+            python_path = image_gen_dir / ".venv" / "bin" / "python"
             command = [
-                "bash", "-c",
-                f"cd {image_gen_dir} && source .venv/bin/activate && uvicorn main:app --host 0.0.0.0 --port 8010"
+                str(python_path), "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8010"
             ]
             log_file = self.needle_home / "logs" / "image-generator-hub.log"
-            self._start_virtual_env_service("Image-generator-hub", command, self.image_gen_pid_file, log_file)
+            self._start_virtual_env_service("Image-generator-hub", command, self.image_gen_pid_file, log_file, image_gen_dir)
         else:
-            typer.echo("Warning: ImageGeneratorsHub not found. Image generation will not be available.")
+            typer.echo("Warning: ImageGeneratorsHub not found or virtual environment not set up. Image generation will not be available.")
 
         # Start backend
         typer.echo("Starting Needle backend...")
@@ -138,7 +144,11 @@ def start_services(self):
             str(python_path), "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"
         ]
         log_file = self.needle_home / "logs" / "backend.log"
-        self._start_virtual_env_service("Backend", command, self.backend_pid_file, log_file, backend_dir)
+        # Set the config directory path to the correct location
+        env_vars = {
+            "SERVICE__CONFIG_DIR_PATH": str(self.needle_home / "configs" / "fast")
+        }
+        self._start_virtual_env_service("Backend", command, self.backend_pid_file, log_file, backend_dir, env_vars)
 
         typer.echo("All services started!")
         typer.echo("🌐 Access Points:")