Update Golang

functions.sh

update_go() {
    local LATEST 
    local GOBIN
    local PATHRC
    LATEST="$(curl -sL "https://golang.org/dl/?mode=json" | jq -r .[0].version)"
    GOBIN='${HOME}/go/bin'
    PATHRC="${HOME}/.bashrc.d/pathrc"
    curl -sLo go.tar.gz "https://dl.google.com/go/$LATEST.linux-amd64.tar.gz"
    rm -rf "${HOME}/go"
    tar -C "${HOME}" -xzf go.tar.gz
    rm -f go.tar.gz
    if grep -q GOBIN "$PATHRC"; then
        sed -i "s|^export GOBIN=.*$|export GOBIN=$GOBIN|" $PATHRC
    else
        sed -i "s|^export PATH=\(.*$\)|export GOBIN=$GOBIN\nexport PATH=\${GOBIN}:\1|" $PATHRC
    fi
    . "${HOME}/.bashrc"
    go version
}