script to upgrade the Cosmos gaia testnet

gaia_upgrade.sh

#!/bin/bash
# Upgrade Cosmos SDK and restart gaiad

POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"

case $key in
    -t|--tag)
    TAG="$2"
    shift # past argument
    shift # past value
    ;;
    --default)
    DEFAULT=YES
    shift # past argument
    ;;
    *)    # unknown option
    POSITIONAL+=("$1") # save it in an array for later
    shift # past argument
    ;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters

if [ -z "$TAG" ]; then
    echo "Usage: gaia_upgrade.sh -t v0.19.0"
    exit 1
fi

export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$PATH

# upgarde system packages
sudo apt upgrade -y

# install  dep and statik
sudo apt install go-dep golang-statik -y

# get latest Cosmos SDK
go get github.com/cosmos/cosmos-sdk
cd $GOPATH/src/github.com/cosmos/cosmos-sdk
git fetch --all
git checkout -f $TAG
make clean && make install

echo ""
echo "Cosmos SDK " $TAG "installed."
echo ""
# Log installed versions
echo "gaiad version :" $(gaiad version)
echo "gaiacli version :" $(gaiacli version)
cd
echo "Stopping gaiad"
sudo service gaiad stop
sudo cp go/bin/gaia* /opt/go/bin/
echo "Starting gaiad"
sudo service gaiad start
echo "gaiad restarted."

Line 28 is only an example of the usage of this script. build-essential only need to install if gcc is not available. It should not be in the upgrade script.