First commit, full project

.gitignore

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+src/*
+build/*

builder

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+#!/bin/bash
+set -euo pipefail
+
+PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
+
+prog='$(basename "$0")'
+
+source environment
+
+version=$1
+package=python3
+package_name=package
+
+echo "$(date) setting global vars..."
+libc6_version=$( dpkg -s libc6 | grep Version | cut -d':' -f2 | cut -d' ' -f2 | cut -d'-' -f1)
+dpkg_arch=$(dpkg --print-architecture)
+deb_package=${package}_${version}_${dpkg_arch}
+src_dir=$PWD/src
+build_dir=$PWD/build
+prefix=usr
+my_dir=$PWD
+
+echo "$(date) installing dependencies..."
+sudo DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt -y -qq install build-essential dpkg-dev $dpkg_depends
+sudo ldconfig
+
+echo "$(date) seting download url"
+download=$dl_prefix/$version/$dl_name-$version.$dl_suffix
+echo "download_url=$download"
+
+echo "$(date) creating build directories..."
+mkdir -p $src_dir
+mkdir -p $build_dir
+mkdir -p $build_dir/$deb_package/DEBIAN
+
+echo "$(date) downloading and extracting source code..."
+cd $src_dir
+wget $download
+tar -xvf $dl_name-$version.$dl_suffix
+rm $dl_name-$version.$dl_suffix
+cd $dl_name-$version
+
+echo "$(date) configuring project..."
+./$configure_sript --prefix=/$prefix $configure_extra_params
+
+echo "$(date) compiling project..."
+make -j$(nproc)
+
+echo "$(date) testing build if activated..."
+if [ $make_test -gt 0 ]; then
+    make test
+fi
+
+echo "$(date) installing build to target directory..."
+make DESTDIR=$build_dir/$deb_package $install_param
+
+cd $my_dir
+
+$build_dir/$deb_package/$prefix/bin/python3 -m pip install --prefix /$prefix --root $build_dir/$deb_package --upgrade pip
+$build_dir/$deb_package/$prefix/bin/python3 -m pip install --prefix /$prefix --root $build_dir/$deb_package six toml
+
+cd $build_dir
+
+echo "$(date) creating DEBIBAN/control..."
+cat << EOF > $deb_package/DEBIAN/control
+Package: $package_name
+Version: $version
+Architecture: $dpkg_arch
+Essential: no
+Priority: optional
+Depends: libc6 (>= $libc6_version)
+Maintainer: bashclub
+Description: The deb package for $package_name $version maintained from bashclub.org.
+EOF
+
+echo "$(date) building deb package..."
+dpkg-deb --build $deb_package
+rm -r $src_dir/$dl_name-$version
+rm -r $build_dir/$deb_package
+
+echo "Build succeeded! You can find the .deb package at: $build_dir/$deb_package.deb"
+exit 0

environment

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+package_name=Python3
+configure_sript=configure
+dl_prefix=https://www.python.org/ftp/python
+dl_name=Python
+dl_suffix=tgz
+dpkg_depends="zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget"
+configure_extra_params="--enable-optimizations"
+make_test=1
+install_param="install"

run

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+#!/bin/bash
+set -euo pipefail
+
+PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
+
+source environment
+source version
+for ver in ${versions[@]}; do
+    VERSION=$(wget -q -O - $dl_prefix/ | grep -o "$ver.[0-9]" | tail -1)
+    ./builder $VERSION
+done

version

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+versions=(3.8 3.9 3.10)