{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Installating Octave"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import os\n",
    "import sys\n",
    "import io\n",
    "import re"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import urllib.request as request  # Python 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# get latest stable release download link \n",
    "base_url = \"https://ftpmirror.gnu.org/octave/windows//"\n",
    "g = request.urlopen(base_url)\n",
    "s = g.read().decode()\n",
    "g.close;\n",
    "\n",
    "r = r'(octave-\\d\\.\\d\\.\\d-w64.zip)'\n",
    "octave_version = re.findall(r,s)[-1][0:-8]\n",
    "ziplink64bit = base_url+octave_version+\"-w64.zip\"\n",
    "octave_zip_fullpath = os.path.join(os.environ[\"WINPYDIRBASE\"], \"t\", octave_version+\"-w64.zip\")\n",
    "siglink64bit = ziplink64bit+\".sig\" # check of pgp signature not implemented\n",
    "print(\"Octave Version: \"+octave_version)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# start download\n",
    "g = request.urlopen(ziplink64bit) \n",
    "with io.open(octave_zip_fullpath, 'wb') as f:\n",
    "    f.write(g.read())\n",
    "g.close\n",
    "g = None"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "#checking it's there\n",
    "assert os.path.isfile(octave_zip_fullpath)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "#extract the zip archive\n",
    "import zipfile\n",
    "try:\n",
    "    with zipfile.ZipFile(octave_zip_fullpath) as z:\n",
    "        z.extractall(os.path.join(os.environ[\"WINPYDIRBASE\"], \"t\"))\n",
    "        print(\"Extracted all files\")\n",
    "except:\n",
    "    print(\"Invalid file\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# delete zip file\n",
    "os.remove(octave_zip_fullpath)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Prepare environment variables\n",
    "os.environ[\"OCTAVE_EXECUTABLE\"] = os.path.join(os.environ[\"WINPYDIRBASE\"], \"t\", octave_version+\"-w64\", \"mingw64\", \"bin\", \"octave-cli.exe\")\n",
    "os.environ[\"OCTAVE_KERNEL_JSON\"] = os.path.join(os.environ[\"WINPYDIR\"], \"share\", \"jupyter\", \"kernels\", \"octave\", \"kernel.json\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Installing iOctave via pip\n",
    "!start cmd /C pip install octave_kernel"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# add octave environment variables to the Jupyter Environment\n",
    "inp_str = r\"\"\"\n",
    "rem ******************\n",
    "rem handle {0} if included\n",
    "rem ******************\n",
    "if not exist \"%WINPYDIRBASE%\\t\\{0}-w64\" goto {0}_bad\n",
    "set OCTAVE_EXECUTABLE=%WINPYDIRBASE%\\t\\{0}-w64\\mingw64\\bin\\octave-cli.exe\n",
    "set OCTAVE_KERNEL_JSON=%WINPYDIR%\\share\\jupyter\\kernels\\octave\\kernel.json\n",
    ":{0}_bad\n",
    "\"\"\".format(octave_version)\n",
    "\n",
    "# append to env.bat\n",
    "with open(os.path.join(os.environ[\"WINPYDIRBASE\"],\"scripts\",\"env.bat\"), 'a') as file :\n",
    "    file.write(inp_str)"
   ]
  }
 ],
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   "display_name": "Python 3",
   "language": "python",
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  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.9.2"
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 "nbformat": 4,
 "nbformat_minor": 4
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