Install Python 2.7.11 on Ubuntu 14.04

README.md

Install latest Python 2.7.11 on Ubuntu 14.04

This script will install the latest version of the 2.7.x branch of Python alongside the system Python in the users local directory and it will symlink all the binaries in ~/bin

Any app or daemon that you require to run with the latest Python just run it as either the separate user or make sure it is running from the Python linked into `/bin

Arguments

install-python.sh <version> <path>

version defaults to 2.7.11

path defaults to /opt/$USER

Install as a separate user

$ sudo useradd python-latest -m -s /bin/bash
$ sudo adduser python-latest sudo
$ sudo passwd python-latest
$ su -l python-latest

Download Script

$ wget "https://gist.githubusercontent.com/nikcub/49885e62cf8b0bff8cf9780aeb2bf7e3/raw/99713739596dc71584abc02cc4c56a7020a649d7/install-python.sh" -O install-python.sh

Install Script

$ sh install-python.sh
(python will install)
$ python -V
Python 2.7.11
$ which python
/home/user/bin/python

install-python.sh

#!/bin/bash

# Install Python in users local directory linked from ~/bin
# Specify version on command line or defaults to 2.7.11

VERSION=${1:-2.7.11}
ENV_BASE=${2:-"/opt/$USER"}

BUILD_ESSENTIALS="dpkg-dev g++ gcc libc-dev make"
PYTHON_REQUIREMENTS="libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev"
PYTHON_BINS="python python2.7 2to3 idle pydoc python2 python2-config python2.7-config python-config"
PYTHON_BINS_EXTRAS="easy_install pip pip2 pip2.7 easy_install-2.7"

echo "Installing Python $VERSION"

function _func_checkroot {
    if [ $EUID -eq 0 ]; then
        echo "Don't run as root";
        exit 1;
    fi
}

function _func_cansudo {
    _CAN_SUDO=`sudo -n uptime 2>&1|grep "load"|wc -l`
    if [ ${_CAN_SUDO} -gt 0 ]
    then
        return 0
    else
        return 1
    fi
}

function _func_package_exists {
    return dpkg -l $1 2>/dev/null | grep 'ii' | wc -l
}

function _func_ifinstall {
    if ! _func_package_exists $@ ; then
        echo "Found $@"
    else
        echo "Installing $@"
        sudo apt-get install -y $@
    fi
}

function _func_ifclean {
    if _func_package_exists $@ ; then
        echo "Removing $@"
        sudo apt-get purge -y $@
    fi
}

function _sys_installreq {
    for pkg in $BUILD_ESSENTIALS $PYTHON_REQUIREMENTS; do
        if dpkg --get-selections | grep -q "^$pkg[[:space:]]*install$" >/dev/null; then
            echo -e "$pkg is already installed"
        else
            # if ! _func_cansudo; then
            #     echo "Could not sudo please run as user who can"
            #     exit 1
            # fi
            if sudo apt-get -qq install $pkg; then
                echo "Successfully installed $pkg"
            else
                echo "Error installing $pkg"
            fi
        fi
    done
}

function _sys_update {
    echo "Running system update commands"
    sudo apt-get -y update
}

function _sys_clean {
    _func_ifclean $BUILD_ESSENTIALS $PYTHON_REQUIREMENTS
}

function _sys_prep {
    echo " * Preparing environment in $ENV_BASE"
    sudo mkdir -p $ENV_BASE/{packages,builds}/python
    sudo chown -R $USER:$USER $ENV_BASE
}

function _sys_link {
    if [ ! -d "$HOME/bin" ] ; then
        mkdir "$HOME/bin"
    fi
    for bin in $@; do
        if [ -h "$HOME/bin/$bin" ] ; then
            rm "$HOME/bin/$bin"
        fi
        if [ -f $ENV_BASE/builds/python/current/bin/$bin ] ; then
            ln -s $ENV_BASE/builds/python/current/bin/$bin "$HOME/bin/$bin"
        else
            echo "Could not link $bin not found: $ENV_BASE/builds/python/current/bin/$bin"
        fi
    done
    source ~/.profile
}

function _py_download {
    echo " * Downloading and unpacking Python $VERSION"
    wget -nv https://python.org/ftp/python/$VERSION/Python-$VERSION.tgz -O $ENV_BASE/packages/python/Python-$VERSION.tgz
    if [ ! -f $ENV_BASE/packages/python/Python-$VERSION.tgz ] ; then
        echo "Could not download - file not at $ENV_BASE/packages/python/Python-$VERSION.tgz"
        exit 0
    fi
    tar -xf $ENV_BASE/packages/python/Python-$VERSION.tgz -C $ENV_BASE/packages/python/
    if [ -h "$ENV_BASE/packages/python/current" ] ; then
        rm $ENV_BASE/packages/python/current
    fi
    ln -s $ENV_BASE/packages/python/Python-$VERSION $ENV_BASE/packages/python/current
}

function _py_build {
    echo " * Building Python in $ENV_BASE/builds/python/$VERSION"
    # compile python source to new directory
    cd $ENV_BASE/packages/python/current
    ./configure --prefix="$ENV_BASE/builds/python/$VERSION" 1>/dev/null
    make install 1>/dev/null
    if [ -h "$ENV_BASE/builds/python/current" ] ; then
        rm $ENV_BASE/builds/python/current
    fi
    if [ ! -d "$ENV_BASE/builds/python/$VERSION/bin" ] ; then
        echo "Didn't install properly something went wrong"
        exit 1
    fi
    ln -s $ENV_BASE/builds/python/$VERSION $ENV_BASE/builds/python/current
}

function _py_install_setuptools {
    wget -nv https://bootstrap.pypa.io/ez_setup.py -O - |  $ENV_BASE/builds/python/current/bin/python
}

function _py_install_pip {
    # use setuptools to install pip
    $ENV_BASE/builds/python/current/bin/easy_install -s $ENV_BASE/builds/python/current/bin/ -d $ENV_BASE/builds/python/current/lib/python2.7/site-packages/ pip
    $ENV_BASE/builds/python/current/bin/pip -V
}

function _py_install_virtualenv {
    # install virtualenv
    $ENV_BASE/builds/python/current/bin/pip install virtualenv
    $ENV_BASE/builds/python/current/bin/pip install virtualenvwrapper
    export WORKON_HOME=~/.environments
    mkdir -p $WORKON_HOME
    echo "export WORKON_HOME=~/.environments" >> ~/.profile
    . ~/.profile
}

function _py_unlink {
    for bin in $PYTHON_BINS; do
        if [ -h "$HOME/bin/$bin" ] ; then
            echo "Unlinked $HOME/bin/$bin"
            rm "$HOME/bin/$bin"
        fi
    done
}

function _py_test {
    PYVER=$(python -c 'import sys; print(".".join(map(str, sys.version_info[:3])))')
    echo "Running Python from `which python` version "$PYVER
}

function _main {
    _func_checkroot
    _sys_installreq
    _sys_prep
    _py_download
    _py_build
    _py_unlink
    _sys_link $PYTHON_BINS
    _py_test
    read -p "Install setuptools and pip? " -n 1 -r
    echo    # (optional) move to a new line
    if [[ ! $REPLY =~ ^[Yy]$ ]]
    then
        _py_install_setuptools
        _py_install_pip
        _sys_link $PYTHON_BINS_EXTRAS
        read -p "Install virtualenv and virtualenvwrapper? " -n 1 -r
        echo    # (optional) move to a new line
        if [[ ! $REPLY =~ ^[Yy]$ ]]
        then
            _py_install_virtualenv
        fi
    fi
}

_main