Build multiple Python versions.

pythonb

#!/bin/bash
#
# Build multiple Python versions.
#
# Author: Akeda Bagus <[email protected]>
# Licensed under MIT license.

BASE_URL=http://python.org/ftp/python/
CURRENT_DIR=$(pwd)
# This is where all python version will be built
TARGET_DIR="/home/lang/python/"

PYTHON_VERSION=$1
DOWNLOAD_FILENAME="Python-${PYTHON_VERSION}.tar.bz2"
DOWNLOAD_URL="${BASE_URL}${PYTHON_VERSION}/${DOWNLOAD_FILENAME}"
CHECK_DOWNLOAD="curl -o /dev/null --silent --head --write-out '%{http_code}' ${DOWNLOAD_URL}"
DOWNLOAD_CMD="curl -C - -O ${DOWNLOAD_URL}"
EXTRACT_CMD="tar -xjf ${DOWNLOAD_FILENAME}" 

# Adjust to your needs
BUILD_OPTIONS=

usage() {
  echo -e "Build multiple Python version."
	echo -e "Usage: $0 [arguments] [PYTHON_VERSION]\n"
	echo -e "Examples:"
	echo -e "Build Python 2.7.3"
	echo -e "\t $0 2.7.3\n"
	echo -e "List of available PYTHON_VERSION"
	echo -e "\t $0 list\n"
	echo -e "[arguments]"
	echo -e " help\t Display this help"
	echo -e " list\t List of available PYTHON_VERSION"
}

python_version_list() {
	echo -e "See http://python.org/ftp/python/"
}

python_switch_to() {
	echo -e "Not Implemented yet"
	exit 1
}

mismatch_version() {
	echo -e "Unrecognized version $PYTHON_VERSION."
	python_version_list
	exit 1
}

python_build() {
	# Set the prefix or target build dir
	TARGET_VERSION_DIR=${TARGET_DIR}${PYTHON_VERSION}
	if [ -d "$TARGET_VERSION_DIR" ]
	then
		# TODO: Rebuild or switch to
		echo -e "$PYTHON_VERSION already exists"
		exit 1
	fi

	# Download the source
	HTTP_CODE=$($CHECK_DOWNLOAD)
	if [[ $HTTP_CODE != "'200'" ]]
	then
		mismatch_version	
	fi
	$DOWNLOAD_CMD
	$EXTRACT_CMD
	rm $DOWNLOAD_FILENAME
	mv Python-${PYTHON_VERSION} $TARGET_VERSION_DIR
	cd ${TARGET_VERSION_DIR}

	# Build
	make clean
	./configure --prefix=${TARGET_VERSION_DIR} ${BUILD_OPTIONS}
	make
	make install

	cd $CURRENT_DIR
	exit 0	
}

# If no args supplied
if [ $# -lt 1 ]
then
	usage
	exit 1
fi

if [[ $1 == "help" ]]
then
	usage
	exit 0
fi

if [[ $1 == "list" ]]
then
	python_version_list
	exit 0
fi

# Otherwise arg is Python version to install or switch into
python_build
exit 0