A Bash script for initialising a clean Ubuntu installation and user account with a pyenv-based workflow.

ubuntu-ec2-init.sh

#!/usr/bin/env bash

# Author: Ned Letcher
#
# This bash script is designed to configure a clean Ubuntu installation (eg new
# EC2 instance) with a somewhat opionated set of packages and tools for working
# on Python projects. In addition to installing a range of packages for dev
# work, it installs pyenv for the current user, overwriting the current .profile
# and modifying the existing .bashrc to make sure pyenv is configured correctly.
#
# Usage:
#         bash ubuntu-ec2-init.sh


# make sure system is updated
sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get -yq \
     -o Dpkg::Options::="--force-confdef" \
     -o Dpkg::Options::="--force-confnew" \
     dist-upgrade

# install pyenv/python deps
sudo DEBIAN_FRONTEND=noninteractive apt-get install \
      -y -q --no-install-recommends \
     make build-essential libssl-dev zlib1g-dev libbz2-dev \
     libreadline-dev libsqlite3-dev wget curl llvm libreadline-dev \
     libsqlite3-dev wget curl llvm xz-utils tk-dev libxml2-dev \
     libxmlsec1-dev libffi-dev liblzma-dev

# install dev tools
sudo DEBIAN_FRONTEND=noninteractive apt-get install \
      -y -q --no-install-recommends \
      git docker.io npm htop byobu emacs vim direnv awscli jq

# install data deps
sudo DEBIAN_FRONTEND=noninteractive apt-get install \
      -y -q --no-install-recommends \
      libsnappy-dev libsqlite3-dev

# get scripts for user's $HOME/bin
mkdir -p $HOME/bin
curl -L https://github.com/git/git/raw/master/contrib/completion/git-prompt.sh > $HOME/bin/git-prompt.sh


# install pyenv
if [ ! -d "$HOME/.pyenv" ] ; then
    curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
fi

# create a new .profile that initialises pyenv *before* sourcing .bashrc
cat > $HOME/.profile <<'EOF'
if [ -d ${HOME}/.pyenv/bin ]; then
    export PYENV_ROOT="$HOME/.pyenv"
    export PATH="$PYENV_ROOT/bin:$PATH"
    eval "$(pyenv init --path)"
fi

if [ -n "$BASH_VERSION" ]; then
    if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
    fi
fi

if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi
EOF


# Append needed pyenv initialisation to current .bashrc
cat >> $HOME/.bashrc <<'EOF'

if  [ -x "$(command -v pyenv)" ]; then
    eval "$(pyenv init -)"
    eval "$(pyenv virtualenv-init -)"
fi
EOF