first voila files

Dockerfile

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+FROM python:3.7
+RUN pip3 install \
+    jhsingle-native-proxy>=0.0.10 \
+    voila \
+    ipywidgets numpy matplotlib
+
+# create a user, since we don't want to run as root
+RUN useradd -m jovyan
+ENV HOME=/home/jovyan
+WORKDIR $HOME
+USER jovyan
+
+COPY --chown=jovyan:jovyan entrypoint.sh /home/jovyan
+COPY --chown=jovyan:jovyan Presentation.ipynb /home/jovyan
+
+EXPOSE 8888
+
+ENTRYPOINT ["/home/jovyan/entrypoint.sh"]
+
+CMD ["jhsingle-native-proxy", "--destport", "8505", "voila", "/home/jovyan/Presentation.ipynb", "{--}port={port}", "{--}no-browser", "{--}Voila.base_url={base_url}/", "{--}Voila.server_url=/"]
+

Presentation.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Sin and Cos Graph demo\n",
+    "\n",
+    "Move the slider to change the value of t."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%matplotlib inline\n",
+    "\n",
+    "from ipywidgets import interact\n",
+    "import matplotlib.pyplot as plt\n",
+    "plt.style.use('seaborn-whitegrid')\n",
+    "import numpy as np"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def pltsincos(t=0):\n",
+    "\n",
+    "    fig = plt.figure(figsize=(10,5))\n",
+    "    ax = plt.axes()\n",
+    "\n",
+    "    x = np.linspace(0, 10, 1000)\n",
+    "    ax.plot(x, np.sin(x*t))\n",
+    "    ax.plot(x, np.cos(x*t))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "243253f82f444084853e648d664bba76",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "interactive(children=(FloatSlider(value=1.0, description='t', max=10.0, min=1.0), Output()), _dom_classes=('wi…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "interact(pltsincos, t=(1,10,0.1));"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

README.md

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+# binderhub-voila-native
+
+A test Binder repo for [jhsingle-native-proxy](https://github.com/ideonate/jhsingle-native-proxy/) using Voila
+
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/danlester/binderhub-voila-native/master)
+
+Has an entrypoint that strips out port from the 'jupyter notebook' command and then runs Voila on the port provided.

entrypoint.sh

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+#!/bin/bash
+
+# For a command line such as:
+# "/home/jovyan/entrypoint.sh jupyter notebook --ip 0.0.0.0 --port 59537 --NotebookApp.custom_display_url=http://127.0.0.1:59537"
+# strip out most args, just pass on the port
+
+
+collect_port=0
+port="8888"
+delim='='
+
+for var in "$@"
+do
+    echo "$var"
+
+    if [ "$collect_port" == "1" ]; then
+       echo "Collecting external port $var"
+       port=$var
+       collect_port=0
+    fi
+
+    splitarg=${var%%$delim*}
+
+    if [ "$splitarg" == "--port" ]; then
+       if [ ${#splitarg} == ${#var} ]; then
+         collect_port=1
+       else
+         port=${var#*$delim}
+         echo "Setting external port $port"
+       fi
+    fi
+done
+
+destport=$((port + 1))
+
+echo "Using internal port $destport"
+
+jhsingle-native-proxy --destport $destport --authtype none voila /home/jovyan/Presentation.ipynb {--}port={port} {--}no-browser {--}Voila.base_url={base_url}/ {--}Voila.server_url=/ --port $port
+