install-pipenv-w-pyenv-at-python-3.6.x.sh

#!/bin/bash

_='run the below scripts line by line not run the whole as a batch file';
_='gist github ref. bit.ly/nnpipenv';

_='create $bashrc soft-linked to ~/.bash_profile, as in macos, if $bashrc file not exists while ~/.bash_profile does exist';
if [[ ! -f ~/.bashrc ]] && [[ -f ~/.bash_profile ]]; then ln -s ~/.bash_profile ~/.bashrc ; fi ;
bashrc="$HOME/.bashrc" ; `# must use $HOME instead of ~ here to get '>> $bashrc' working below`

_='#region install pyenv for ubuntu 16';
sudo apt update ;
sudo apt install -y make build-essential libssl-dev zlib1g-dev libbz2-dev \
  libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev \
  xz-utils tk-dev libffi-dev ;
sudo apt autoremove -y ;

git clone https://github.com/pyenv/pyenv.git ~/.pyenv ;

echo -e '\n# pyenv setup'                     >> $HOME/.bashrc ;
echo    'export PYENV_ROOT="$HOME/.pyenv"'    >> $HOME/.bashrc ;
echo    'export PATH="$PYENV_ROOT/bin:$PATH"' >> $HOME/.bashrc ;
echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n  eval "$(pyenv init -)"\nfi' >> $HOME/.bashrc ;

_='restart shell & aftermath check' ;
source $HOME/.bashrc ;
pyenv --version ;

_='resolve common build error ref. from pyenv error message -> https://github.com/pyenv/pyenv/wiki/Common-build-problems'
sudo apt-get install -y build-essential libssl-dev zlib1g-dev libbz2-dev ;
sudo apt-get install -y libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev ;
sudo apt-get install -y xz-utils tk-dev libffi-dev liblzma-dev python-openssl git ;

_='latest python version' ;
py_release_version='3.6' ;
py_release_version='3.8' ;
py_latest=`curl -s https://www.python.org/doc/versions/ | grep "release/$py_release_version" | head -n1 | cut -d'>' -f3 | cut -d'<' -f1 | cut -d' ' -f2` ;
echo $py_latest ;

_='install python :py36x_latest';
pyenv install $py_latest ;

`# set it global`
pyenv global  $py_latest ;
  source $HOME/.bashrc ; `# must reload to get effect `
  python --version ; `# should be :py36x_latest`

_='#endregion install pyenv for ubuntu 16';


`#region pipenv installation`

`# install pipenv`
old='curl https://raw.githubusercontent.com/kennethreitz/pipenv/master/get-pipenv.py | python';
python -m pip install --upgrade pip ; python -m pip install pipenv ; 

echo -e '\n# pipenv setup'                                   >> $HOME/.bashrc ; 
echo    'export PATH="~/.local:$PATH"'                       >> $HOME/.bashrc ;
echo    'export PIPENV_VENV_IN_PROJECT=1'                    >> $HOME/.bashrc ; _="project's venv location will be in the project folder as .venv ref. https://pipenv.readthedocs.io/en/latest/advanced/#pipenv.environments.PIPENV_VENV_IN_PROJECT";
echo    "export PIPENV_DEFAULT_PYTHON_VERSION=$py36x_latest" >> $HOME/.bashrc ; _='python version used by pipenv';
echo    'eval "$(pipenv --completion)"'                      >> $HOME/.bashrc ; _='shell auto-completion ref. https://pipenv.readthedocs.io/en/latest/advanced/#shell-completion'

`# restart shell & aftermath check`
source $HOME/.bashrc ;
pipenv --version ; _='eg. pipenv, version 2018.11.26' ;

`#endregion pipenv installation`