Python 3.6.x installer for ubuntu

py36installer.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Just python 3.6.X deploy and install for UBUNTU 16.04 or greater

Can be run in python 2 and 3
Research, linux_py36 Started by Aaron Giovannini (agiovannini)

This file was created at 12/junio/2017
"""

import os
import sys
import requests
import importlib
from pathlib import Path
from subprocess import call
from distutils.dir_util import copy_tree
from distutils.file_util import copy_file


CURR_DIR = os.getcwd()


def check_import(module_name, lib_name=None):
    """
    Simple function to use in setup enviroments, to check if some special library is not installed and install with pip
    :param module_name: module name to install with pip
    :param lib_name: package import line, if not defined same as module_name
    :return:
    """
    if not lib_name:
        lib_name = module_name
    try:
        i = importlib.import_module(lib_name)
    except Exception as err:
        os.system(
            "{sys.executable} -m pip install {module_name}".format(sys=sys, module_name=module_name))
        os.system("{sys.executable} {args}".format(
            sys=sys, args=' '.join(sys.argv)))
        exit(0)


check_import("requests")
check_import("logging")
import logging
import requests
logging.getLogger().setLevel(logging.DEBUG)

if os.geteuid() != 0:  # Check for root privileges
    raise RuntimeError("This tool need to be executed as root user")

release_data = None
try:
    with open('/etc/os-release', 'r') as reader:
        release_data = reader.readlines()
except Exception as err:
    raise RuntimeError(
        "can't open release data, maybe not running in ubuntu-linux")

# Check if running under linux-ubuntu
if release_data and "ubuntu" not in release_data[0].lower():
    raise RuntimeError(
        "Unsupported operating system, {0}".format(release_data))
elif not release_data:
    raise RuntimeError("Release data not found, are using ubuntu-linux?")


os.system("""
add-apt-repository ppa:jonathonf/python-3.6 -y
apt-get update
apt-get install python3.6-tk python3.6 python3.6-dev libffi-dev git make \\
build-essential libssl-dev curl zlib1g-dev libbz2-dev libreadline-dev \\
libsqlite3-dev tk-dev tcl-dev python-pip python-virtualenv \\
software-properties-common python-setuptools python3-pip python python3 -y
# rm -f /usr/bin/python
curl https://bootstrap.pypa.io/get-pip.py | python2
""")

data = """#!/usr/bin/python3.6
# -*- coding: utf-8 -*-

import re
import sys

from pip import main

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
    sys.exit(main())

"""

with open("/usr/local/bin/pip3.6", "w") as st:
    st.write(data)


os.system("python3.6 -m pip install pip --upgrade")

Path("/usr/bin/python3").unlink()
os.system(
    "sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 1")
os.system(
    "sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.5 2")


# Ubuntu 16.04 now uses by default python3 with python 3.5
# In order to serve an easy way for python 3.6 will activate in python instead python3
Path("/usr/bin/python").unlink()
os.system(
    "sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.5 1")
os.system(
    "sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 2")
os.system(
    "sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.6 3")


lib_python3 = Path("/usr/lib/python3/")


def walk(path):
    for inner in Path(path).iterdir():
        if inner.is_dir():
            for sub in inner.iterdir():
                yield sub
        else:
            yield inner


for f in walk(lib_python3):
    if "-35m-" in f.name:
        if "_cffi_" in f.name:
            continue  # Need to compile for 3.6
        copy_file(f.as_posix(), f.as_posix().replace("-35m-", "-36m-"))

# Well need to copy 3.5 libraries, and merge into python3 shared,
# and... need to rename from -35m- to -36m- making python3.6 supported

pt = Path("/usr/lib/python3.6/lib-dynload/")
if not pt.exists():
    pt.mkdir(parents=True)

try:
    copy_file('/usr/lib/python3.5/lib-dynload/_gdbm.cpython-35m-x86_64-linux-gnu.so',
            '/usr/lib/python3.6/lib-dynload/_gdbm.cpython-36m-x86_64-linux-gnu.so')
except Exception as err:
    pass

with open("/usr/local/bin/pip", "w") as st:
    # For some reason pip for python2.7 was overwrited to python3.6
    st.write(data.replace("python3.6", "python"))
with open("/usr/local/bin/pip3", "w") as st:
    st.write(data.replace("python3.6", "python3"))

cffi_link = "https://bitbucket.org/cffi/cffi/get/tip.tar.gz"
cffi_tar = "/tmp/cffi.tar.gz"
with open(cffi_tar, "wb") as down:
    down.write(requests.get(cffi_link).content)

# That link is for compile and download cffi for python3.6
os.system("""
        cd /tmp
        mkdir cffi
        tar -zxvf {cffi_tar} -C ./cffi --strip-components=1
        cd cffi
        /usr/bin/pyton3.6 setup.py build_ext -f -i
        /usr/bin/python3.6 setup.py install
        rm -r /tmp/cffi*
        """.format(cffi_tar=cffi_tar))
os.chdir(CURR_DIR)

• If try to use cffi.FFI() raises Exception (cffi module was compiled for python 3.5) [Status] Pending to fix, researching how to solve
• When python 2.7 is installed on ubuntu, if activates 3.6 for python, we had some exceptions that i'm researching to fix. currently need to change with update-alternatives until found fix.