install-dbt-dev.sh

#!/bin/bash

INSANE_PYTHON='/usr/bin/python' # not sane?
VENV_PATH="$HOME/.dbt/dbt-dev-env"
DBT_REPO_REMOTE="https://github.com/fishtown-analytics/dbt.git"
DBT_LOCAL_PATH="${TMPDIR}dbt-development"
DBT_ALIAS="use-dbt-dev"

function install_python() {
    echo 'Installing python'
    brew install python3
    brew link python3
}

function create_venv() {
    echo "Creating virtualenv at ${VENV_PATH}"
    mkdir -p "$VENV_PATH"
    python3 -m venv "${VENV_PATH}"
}


# Install sane python if needed
installed_python="$(which python)"
if [ $installed_python = $INSANE_PYTHON  ] ; then
    install_python
else
    echo "Python ${installed_python} is sane"
fi


# Create a new virtualenv if needed
if [ ! -d $VENV_PATH ] ; then
    create_venv
fi


# Always pull latest dbt
echo "Getting latest dbt development"
if [ -d $DBT_LOCAL_PATH ] ; then 
    echo "Already downloaded -- pulling development"
    pushd .
    cd $DBT_LOCAL_PATH
    git pull origin master
    popd
else
    echo "Cloning dbt"
    git clone "$DBT_REPO_REMOTE" "$DBT_LOCAL_PATH"
fi


# Install dbt into venv
source "${VENV_PATH}/bin/activate"

pip install --upgrade pip
pip install --upgrade setuptools

echo "Installing latest dbt development"
pip install $DBT_LOCAL_PATH

alias $DBT_ALIAS 2>/dev/null >/dev/null
is_installed=$?

echo
echo
echo "============================================================================"

if [ 1 -eq $is_installed ] ; then
    echo "Run the following lines of code to complete installation:"
    echo
    echo "echo 'alias $DBT_ALIAS=\"source ${VENV_PATH}/bin/activate\"' >> ~/.profile"
    echo "source ~/.profile"
    echo
    echo "----------------------------------------------------------------------------"
    echo

fi

echo "To use a development version of dbt, run:"
echo
echo "  $DBT_ALIAS"
echo
echo "To later revert to a production build, run:"
echo
echo "  deactivate"
echo
echo "============================================================================"