init

spawnerdockerfile/start-notebook.py

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+#!/usr/bin/env python
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import os
+import shlex
+import sys
+
+# If we are in a JupyterHub, we pass on to `start-singleuser.py` instead so it does the right thing
+if "JUPYTERHUB_API_TOKEN" in os.environ:
+    print(
+        "WARNING: using start-singleuser.py instead of start-notebook.py to start a server associated with JupyterHub."
+    )
+    command = ["/usr/local/bin/start-singleuser.py"] + sys.argv[1:]
+    os.execvp(command[0], command)
+
+
+# Wrap everything in start.sh, no matter what
+command = ["/usr/local/bin/start.sh"]
+
+# If we want to survive restarts, tell that to start.sh
+if os.environ.get("RESTARTABLE") == "yes":
+    command.append("run-one-constantly")
+
+# We always launch a jupyter subcommand from this script
+command.append("jupyter")
+
+# Launch the configured subcommand. Note that this should be a single string, so we don't split it
+# We default to lab
+jupyter_command = os.environ.get("DOCKER_STACKS_JUPYTER_CMD", "lab")
+command.append(jupyter_command)
+
+# Append any optional NOTEBOOK_ARGS we were passed in. This is supposed to be multiple args passed
+# on to the notebook command, so we split it correctly with shlex
+if "NOTEBOOK_ARGS" in os.environ:
+    command += shlex.split(os.environ["NOTEBOOK_ARGS"])
+
+# Pass through any other args we were passed on the command line
+command += sys.argv[1:]
+
+# Execute the command!
+os.execvp(command[0], command)