build-python.sh

#!/bin/bash

VERSION=3.11.8
VERSION_SHORT=3.11

mkdir -p /usr/local/src
cd /usr/local/src

if [ ! -f Python-${VERSION}.tgz ]; then
wget -O Python-${VERSION}.tgz https://www.python.org/ftp/python/${VERSION}/Python-${VERSION}.tgz
fi

tar xzf Python-${VERSION}.tgz
cd Python-${VERSION}

if [ ! -f python ]; then
./configure --enable-optimizations --with-ensurepip=install --prefix=/usr/local --enable-shared --with-lto --enable-ipv6 --with-system-expat --with-system-ffi --with-threads --with-computed-gotos --enable-loadable-sqlite-extensions
fi

echo "### make altinstall"
sudo make altinstall
sudo update-alternatives --install /usr/bin/python python /usr/local/bin/python${VERSION_SHORT} 1

echo "### install pip"
/usr/local/bin/python${VERSION_SHORT} -m pip install --upgrade pip
sudo update-alternatives --install /usr/bin/pip pip /usr/local/bin/pip${VERSION_SHORT} 1

cd ..