#!/bin/bash

#author:  tmade
#version: 1.2

INTERFACE="eth0"
CALICOURLVERSION="v3.11"
FILE="calico.yaml"
URL="https://docs.projectcalico.org/${CALICOURLVERSION}/manifests/$FILE"
USER="kubernetes"
HOME="/home/${USER}/calico"

if  [ -d ${HOME} ]
then
        cd ${HOME}
        echo ""
        echo "Changed path to \"${HOME}\""
        echo ""
else
        echo ""
        echo "Directory \"${HOME}\" doesn´t exist, please create it via su - kubernetes -c \"mkdir ${HOME}\" and rerun the script!\""
        echo ""
        exit 1
fi

echo ""
echo "Download $URL and set interface"
echo ""

curl $URL | sed 's/value: "autodetect"/value: "autodetect"\n            - name: IP_AUTODETECTION_METHOD\n              value: "interface='${INTERFACE}'"/g' > ${HOME}/${FILE}

echo ""
echo "calico downloaded"
echo ""
CALICOVERSION=$(grep "calico/node:v" $HOME/$FILE | rev |cut -d ":" -f 1 |rev)
echo "renaming..."
echo ""
mv ${HOME}/${FILE} ${HOME}/calico-${CALICOVERSION}.yaml
chown ${USER}:${USER} *
echo "done"