#!/usr/bin/env bash

set -e # fail on first error

if conda --version > /dev/null 2>&1; then

echo "conda appears to already be installed"

exit 0

fi

PYTHON_VERSION=${PYTHON_VERSION:-3.6} # if no python specified, use 3.6

if [ ${PYTHON_VERSION} == "2.7" ]; then

INSTALL_FOLDER="$HOME/miniconda2"

else

INSTALL_FOLDER="$HOME/miniconda3"

fi

if [ ! -d $INSTALL_FOLDER ] || [ ! -e $INSTALL_FOLDER/bin/conda ]; then

if [ "$(uname)" == "Darwin" ]; then

URL_OS="MacOSX"

elif [ "$(expr substr "$(uname -s)" 1 5)" == "Linux" ]; then

URL_OS="Linux"

elif [ "$(expr substr "$(uname -s)" 1 10)" == "MINGW32_NT" ]; then

URL_OS="Windows"

fi

echo "Downloading miniconda for $URL_OS"

DOWNLOAD_PATH="miniconda.sh"

if [ ${PYTHON_VERSION} == "2.7" ]; then

wget http://repo.continuum.io/miniconda/Miniconda-latest-$URL_OS-x86_64.sh -O ${DOWNLOAD_PATH};

else

wget http://repo.continuum.io/miniconda/Miniconda3-latest-$URL_OS-x86_64.sh -O ${DOWNLOAD_PATH};

fi

echo "Installing miniconda for python-$PYTHON_VERSION to $INSTALL_FOLDER"

# install miniconda to home folder

bash ${DOWNLOAD_PATH} -b -f -p $INSTALL_FOLDER

# tidy up

rm ${DOWNLOAD_PATH}

else

echo "Miniconda already installed at ${INSTALL_FOLDER}. Updating, adding to path and exiting"

fi

export PATH="$INSTALL_FOLDER/bin:$PATH"

echo "Adding $INSTALL_FOLDER to PATH. Consider adding it in your .rc file as well."

conda update -q -y conda