A small command to update atom. Please comment if you see anything wrong, I am just beginning to explore bash as a control language.

atom_update

#!/bin/bash

###########################
#FUNCTIONS and DEFINITIONS#
###########################
#The following function was taken from https://gist.github.com/crazy-max/5695540.
function wgetFilter() {
  local flag=2 c count cr=$'\r' nl=$'\n'
  while IFS='' read -d '' -rn 1 c
  do
    if [ $flag == 1 ]
    then
      printf '%c' "$c"
      if [[ "$c" =~ (s$) ]]
      then
        flag=0
        echo ""
      fi
    elif [ $flag != 0 ]
    then
      if [[ $c != $cr && $c != $nl ]]
      then
        count=0
      else
        ((count++))
        if ((count > 1))
        then
          flag=1
        fi
      fi
    fi
  done
}
GIST_URL="https://gist.github.com/awesomebing1/c92a272eaa0310ca1deb"
# End of functions
###########################
#           CODE          #
###########################
# Gaining sudo access.
printf "[!] The following code requires super user access. Please enter your password in the prompt below.\n"
sudo printf "[-] Thank you, unless you've changed your sudo config you won't have to enter your password again.\n"
# A double check to check if we've already downloaded something.
if [ ! -f /tmp/atom.deb ]; then
  # If we have downloaded something, remove it, please.
  echo "[-] Removing previously downloaded files... "
  rm -rf /tmp/atom.deb
  printf "done.\n"
fi
printf "[+] Now downloading the Atom package: \n"
# We've either done nothing or removed stuff. Let's download the file.
wget --progress=bar:force "https://atom.io/download/deb" -O /tmp/atom.deb 2>&1 | wgetFilter
echo "[-] Checking if download was a success... "
if [ -f /tmp/atom.deb ]; then
  printf "it was. \n"
  echo "[!] Now installing package."
  sudo dpkg --install /tmp/atom.deb
  if [ $? -eq 0 ]; then
    echo "[-] Now upgrading all Atom packages."
    apm upgrade --confirm false
    if [ $? -eq 0 ]; then
      echo "[-] We're done! Enjoy your new version of Atom!"
      exit 0
    else
      echo "[!] For some reason, your Atom packages did not upgrade."
      echo "[!] If this was reached, please comment on the following gist: $(GIST_URL)"
      echo "[!] Exiting."
      exit 213
  fi
  else
    echo "[!] For some reason, dpkg failed to install atom."
    echo "[!] If this was reached, please comment on the following gist: $(GIST_URL)"
    exit 212
  fi
else
  printf "it was not. \n"
  echo "If this was an error, please comment on the following gist: $(GIST_URL)"
  exit 211
fi