python-2.7.16-0.build.sh

#! /bin/bash

# to build system python:
#   umask 022
#   sudo mkdir -p /usr/local/system/python-2.7.16-0
#   sudo chown build:build /usr/local/system/python-2.7.16-0
#   sudo -u build ./python-2.7.16-0.build.sh 2>&1 | tee python-2.7.16-0.build.log
#   sudo chown -R bin:bin /usr/local/system/python-2.7.16-0

PKG=python
VERSION=2.7.16
BUILD=0
URL=https://www.python.org/ftp/python/$VERSION/Python-$VERSION.tgz

PREFIX=/usr/local/system/$PKG-$VERSION-$BUILD

set -xe
umask 022

BUILD_TMPDIR=/dev/shm/$PKG-$VERSION-$BUILD.build.tmp
test -d $BUILD_TMPDIR && rm -rf $BUILD_TMPDIR
mkdir -p $BUILD_TMPDIR/home
export TMPDIR=$BUILD_TMPDIR
export HOME=$BUILD_TMPDIR/home

exec </dev/null

mkdir -p $PREFIX
cat >$PREFIX/profile <<-EOF
	PATH=$PREFIX/bin:\$PATH
EOF
. $PREFIX/profile

export MAKEFLAGS="-j $(nproc)"

BUILDDIR=$PREFIX/build

mkdir -p $BUILDDIR
cd $BUILDDIR

test -e Python-$VERSION.tgz || wget $URL
test -d Python-$VERSION || tar xf Python-$VERSION.tgz
cd Python-$VERSION

./configure --prefix=$PREFIX --enable-shared LDFLAGS=-Wl,-rpath,$PREFIX/lib
make
make install

python -m ensurepip
pip install --upgrade pip

exit