pass paths explicitly

jhub_apps/main.py

@@ -1,11 +1,51 @@
+import subprocess
+from pathlib import Path
+
 from jhub_apps.__about__ import __version__
 
 import argparse
 
+PROJECT_ROOT_PATH = Path(__file__).parent.parent
+DEFAULT_JUPYTERHUB_CONFIG = PROJECT_ROOT_PATH / "jupyterhub_config.py"
+DEFAULT_JUPYTERHUB_SQLLITE_PATH = PROJECT_ROOT_PATH / "jupyterhub.sqlite"
+
+
+def run_japps(jupyterhub_config):
+    db_url = f"--JupyterHub.db_url=sqlite:////{DEFAULT_JUPYTERHUB_SQLLITE_PATH}"
+    command = ["jupyterhub", "-f", str(jupyterhub_config), db_url]
+    print(f"Running command: {' '.join(command)}")
+    with subprocess.Popen(
+        command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True
+    ) as process:
+        try:
+            while True:
+                output = process.stdout.readline()
+                if output == "" and process.poll() is not None:
+                    break
+                if output:
+                    print(output.strip())
+        except Exception as e:
+            print(f"An error occurred: {e}")
+        finally:
+            # Get the remaining output if any
+            for output in process.stdout.readlines():
+                print(output.strip())
+
+    # Get the return code from the process and print it
+    return_code = process.poll()
+    print(f"Process returned with code {return_code}")
+
 
 def app():
     parser = argparse.ArgumentParser(
-        prog='JHub Apps',
-        description='JupyterHub App Launcher')
-    parser.add_argument('--version', action='version', version=__version__)
-    parser.parse_args()
+        prog="JHub Apps", description="JupyterHub App Launcher"
+    )
+    parser.add_argument("--version", action="version", version=__version__)
+    parser.add_argument(
+        "-f",
+        "--config-file",
+        default=DEFAULT_JUPYTERHUB_CONFIG,
+        help="Path to the JupyterHub config file",
+    )
+    args = parser.parse_args()
+    run_japps(jupyterhub_config=args.config_file)