Installing pyenv-virtualenwrapper from scratch!

python-virtual-heaven.sh

#!/bin/sh

#Assuming you have Homebrew http://brew.sh/
# This is adapted from: https://github.com/18F/laptop/blob/master/mac
terminal_program="CHOOSE "zsh" or "bash""

zsh_or_bash() {
  if ["$shell_program" = "zsh"] ; then
    filename=".zshrc"
  else
    filename=".bashrc"
  fi
}

zsh_or_bash terminal_program

append_to_file() {
  local file="$1"
  local text="$2"

  if [ "$file" = "$HOME/$filename" ]; then
    if [ -w "$HOME/$filename" ]; then
      file="$HOME/$filename.local"
    else
      file="$HOME/$filename"
    fi
  fi

  if ! grep -qs "^$text$" "$file"; then
    printf "\n%s\n" "$text" >> "$file"
  fi
}

if [ ! -d "$HOME/.bin/" ]; then
  mkdir "$HOME/.bin"
fi

if [ ! -f "$HOME/$filename" ]; then
  touch "$HOME/$filename"
fi

append_to_file "$HOME/$filename" 'export PATH="$HOME/.bin:$PATH"'

brew install pyenv

append_to_file "$HOME/$filename" 'if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi'
# shellcheck disable=SC2016
append_to_file "$HOME/$filename" 'if which pyenv-virtualenv-init > /dev/null; then eval "$(pyenv virtualenv-init -)"; fi'

latest_python_3="$(brew info python3 | sed -n -e 's/^.*python3: stable //p' | egrep -o "3\.\d+\.\d+")"

  if ! pyenv versions | ag "$latest_python_3" > /dev/null; then
    pyenv install "$latest_python_3"
    pyenv global "$latest_python_3"
    pyenv rehash
  fi

brew install pyenv-virtualenv
brew install pyenv-virtualenvwrapper

append_to_file "$HOME/$filename" 'export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3'
append_to_file "$HOME/$filename" 'export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv'
append_to_file "$HOME/$filename" 'export WORKON_HOME=$HOME/.virtualenvs'
append_to_file "$HOME/$filename" 'source /usr/local/bin/virtualenvwrapper.sh'