py-install-version

#!/bin/bash
# Install a version of Python (in `$HOME/opt`).
# Usage: py-install-version PY_VERSION [--force]
# Opalstack doc: https://community.opalstack.com/d/204-howto-install-a-newer-or-older-version-of-python


. `dirname ${BASH_SOURCE[0]}`/_py-utils


# Validate script arguments.
if [ $# -lt 1 ]; then
  echo -e "\e[1;37mUsage:\e[0m \e[33m`basename ${BASH_SOURCE[0]}` PY_VERSION [--force]\e[0m"
  exit 1
fi


# Initialization.
PY_VERSION=$1
[[ "$*" =~ "--force" ]] && FORCE=true || FORCE=false

# Check if already available.
if pyVersionExists $PY_VERSION && [ $FORCE = false ]; then
  py_exec=`pyWhichExec $PY_VERSION`
  py_real_version=`pyRealVersion $py_exec`
  echo "Python $py_real_version is already available ($py_exec)."
  [ "$py_real_version" = "$PY_VERSION" ] || echo "Use '--force' to install it anyway."
  exit 1
fi

mkdir -p $HOME/tmp $LOCAL_PYTHON_DIR/bin
export TMPDIR=$HOME/tmp


# Install version.
cd $TMPDIR
echo -e "\e[1;37mDownloading sources…\e[0m"
wget -nv https://www.python.org/ftp/python/$PY_VERSION/Python-$PY_VERSION.tgz
[ $? = 0 ] || { echo -e "\e[31mERROR: Downloading sources failed.\e[0m"; exit 1; }

tar zxf Python-$PY_VERSION.tgz

cd Python-$PY_VERSION
echo -e "\n\e[1;37mInstalling Python $PY_VERSION…\e[0m"
./configure --prefix=$LOCAL_PYTHON_DIR
make
make install
cd ..

echo -e "\n\e[1;37mDeleting sources…\e[0m"
rm -rf Python-${PY_VERSION}*


# Execution report.
py_exec=`pyWhichExec $PY_VERSION`
[ -z "$py_exec" ] && { echo -e "\e[31mERROR: Python $PY_VERSION executable not found.\e[0m"; exit 1; }
echo -e "\n\e[32mSuccessfully installed Python `pyRealVersion $py_exec` ($py_exec).\e[0m"
echo