Download Go and Install - Linux

go.sh

#!/bin/bash
#Download GO and install it

curl=$(which curl)
outfile="output.txt"
base_url="https://go.dev"
download="dl"

url="$base_url/$download/"

function dump_webpage() {
    $curl -o $outfile $url -s
    check_errors
}

function strip_html() {
        grep "download downloadBox" $outfile | grep "/dl.*\"" -o | sed 's/"//g' > temp.txt
        echo "GETTING URL OK"
        curl -L "$base_url$(cat temp.txt|sed -n 3p)" -o go.tar.gz -s > /dev/null
        echo "DOWNLOAD OK"
        rm temp.txt
        rm $outfile
        check_errors
        sudo tar -xvf go.tar.gz > /dev/null 
        echo "ARCHIVE EXTRACT OK"
        sudo mv go /usr/local > /dev/null
        echo "MOVE TO /usr/local OK"
        echo "export GOROOT=/usr/local/go" >> ~/.$(echo $SHELL|sed "s/\/bin\///g")rc
        echo "export GOPATH=$HOME/go" >> ~/.$(echo $SHELL|sed "s/\/bin\///g")rc
        echo 'export PATH=/usr/local/go/bin/:$HOME/go/bin/:$PATH' >> ~/.$(echo $SHELL|sed "s/\/bin\///g")rc
        echo "ALIAS SET OK"
        sleep 1
        cd ~/
        pwd
        source .$(echo $SHELL|sed "s/\/bin\///g")rc
        echo .$(echo $SHELL|sed "s/\/bin\///g")rc
        echo "source OK"
        echo "VERIFYING..."
        go version
        echo "READY!"
}

function check_errors() {
    [ $? -ne 0 ] && echo "Error Downloading Page..." && exit -1
}

dump_webpage
strip_html

# I don't know why, but adding to path doesn't work. Please add to path manually and $source .bashrc | .zshrc THANKS