Python - How to apply patch to Python and Install Python via Pyenv

March 03, 2021

Introduction

In this post, we will see how we can apply a patch to Python and install it through pyenv.

Python Patch for FIPS (as example)

We will take example of FIPS patch to python 3.9.2, as in post

Install via Pyenv

We are doing it for Centos-7.

First, we will set some environment variable.

PYENV_VERSION=3.9.2
PYENV_INSTALLER_URL=https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer
PYTHON_CONFIGURE_OPTS="--enable-shared"

Lets download pyenv installer.

umask 022
curl -s -S -L "$PYENV_INSTALLER_URL" -o /usr/bin/pyenv-installer
chmod 0755 /usr/bin/pyenv-installer

Installing Pyenv

/usr/bin/pyenv-installer
export PATH="/root/.pyenv/bin:$PATH"
eval "$(pyenv init -)"

Apply patch (assuming we have patch from post) and Install Python 3.9.2

pyenv install --patch $PYENV_VERSION < python_patch_3.9.2.patch
pyenv global $PYENV_VERSION

Its clean and easier way to install Python through pyenv.

Dockerfile

Lets do it via Dockerfile

FROM centos:7

RUN yum makecache fast && yum -y update

RUN yum -y install git \
    libffi-devel libffi libssh2-devel autoconf automake libtool \
    libxml2-devel libxslt-devel libjpeg-devel zlib-devel \
    make cmake gcc python-devel python-setuptools wget \
    && yum clean all \
    && rm -rf /var/cache/yum

ADD python_patch_3.9.2.patch /python_installation/
ARG PYENV_VERSION=3.9.2
ENV PYENV_INSTALLER_URL=https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer
ENV PYTHON_CONFIGURE_OPTS="--enable-shared"
RUN umask 022 \
 && curl -s -S -L "$PYENV_INSTALLER_URL" -o /usr/bin/pyenv-installer \
 && chmod 0755 /usr/bin/pyenv-installer \
 && /usr/bin/pyenv-installer \
 && eval "$(pyenv init -)" \
 && pyenv install --patch $PYENV_VERSION < /python_installation/python_patch_3.9.2.patch \
 && pyenv global $PYENV_VERSION

python pyenv