build-python.sh

#!/usr/bin/env bash
# Copyright 2016 Djebran Lezzoum All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# build and install python to a local user folder
# build-python.sh ver target_folder

SCRIPT=$(readlink -f "${0}")
THIS_PATH=$(dirname "${SCRIPT}")

INSTALL_REQUIREMENTS=false
PY_FILE_BASE_URL="https://www.python.org/ftp/python"

cd ${THIS_PATH}

PY_MIN="${1}"

if [ ! ${PY_MIN} ]
then
  # latest stable
  PY_MIN="3.5"
fi

declare -A builds=(["2.7"]="12" ["3.4"]="5" ["3.5"]="2" ["3.6"]="0rc1")

PY_BUILD="${builds[$PY_MIN]}"
if [ ! ${PY_BUILD} ]
then
  echo "no build defined for ${PY_MIN}"
  exit 1
else
  echo "> proceed to build python: ${PY_MIN}.${PY_BUILD}"
fi

PY_VER="${PY_MIN}.${PY_BUILD}"
PY_BIN="python${PY_MIN}"

TARGET_HOME="${2}"

if [ ! ${TARGET_HOME} ]
then
  TARGET_HOME="${HOME}/bin"
else
  if [ ! -d  ${TARGET_HOME} ]
  then
    echo "target  does not exits: ${TARGET_HOME}"
    exit 1
  fi
fi

LOCAL_PYTHON_HOME="${TARGET_HOME}/python/${PY_MIN}"

echo "> compile python to target folder: ${LOCAL_PYTHON_HOME}"

PY="${LOCAL_PYTHON_HOME}/bin/${PY_BIN}"
PY_FILE="Python-${PY_VER}.tar.xz"

if [[ ${PY_BUILD} == *"b"* || ${PY_BUILD} == *"a"* || ${PY_BUILD} == *"rc"* ]]
then
  echo "> proceding with pre release build"
  PY_FILE_URL="${PY_FILE_BASE_URL}/${PY_MIN}.0/${PY_FILE}"
else
  PY_FILE_URL="${PY_FILE_BASE_URL}/${PY_VER}/${PY_FILE}"
fi

if [ ${INSTALL_REQUIREMENTS} == true ]
then
  # install requirements
  sudo apt-get update
  sudo apt-get install build-essential
  sudo apt-get install libncursesw5-dev libgdbm-dev libc6-dev libreadline-dev libncurses-dev
  sudo apt-get install libssl-dev openssl
  sudo apt-get install zlib1g-dev libbz2-dev libzip-dev libsqlite3-dev
  # / install requirements
fi

if [ ! -d  ${LOCAL_PYTHON_HOME} ]
then
  echo "creating target folder: ${LOCAL_PYTHON_HOME}"
  mkdir -p ${LOCAL_PYTHON_HOME}
fi

echo "dowloading file: ${PY_FILE_URL}"
wget "${PY_FILE_URL}"

echo "extract content from: ${PY_FILE} ..."
if [ ! -f ${PY_FILE} ]
then
  echo "file does not exits: ${PY_FILE}"
  exit 1
fi

tar -xf $PY_FILE

echo "remove ${PY_FILE}"
rm ${PY_FILE}

PY_SOURCE_FOLDER_NAME="Python-${PY_VER}"

cd ./${PY_SOURCE_FOLDER_NAME}

echo "configure with prefix: ${LOCAL_PYTHON_HOME}"

./configure --prefix=${LOCAL_PYTHON_HOME} --without-tk --with-ensurepip=install

# --enable-shared

make
make install

cd ${THIS_PATH}

# remove the extracted source folder
rm -r -f ${THIS_PATH}/${PY_SOURCE_FOLDER_NAME}
# export LD_LIBRARY_PATH="${LOCAL_PYTHON_HOME}/lib"
$PY -m pip install pip --upgrade
$PY -m pip install virtualenv --upgrade

exit 0