A shell script to download and update Atom (atom.io) for Debian based operating systems.

update-atom.sh

#!/usr/bin/env bash
#
# Checks to see if atom.io has a newer stable release than what is currently
# installed, and updates it when necessary.
#
# Dependencies:
#
#   * awk
#   * curl
#   * dpkg
#   * sudo
#   * wget

# Get the URL for downloading the latest version.
DOWNLOAD_URL=`
  # Redirects to the latest stable release - fetching the document's HEAD.
  curl https://atom.io/download/deb -Is | \

  # Extract the URL of the location from the HTTP header.
  awk 'BEGIN {FS=": "}/^Location/{print $2}'
`
# Get the version of Atom that is currently installed.
INSTALLED_VERSION=`
  # Show the status of the installed version of Atom.
  dpkg -s atom | \

  # Find the status line that has the version number and get the version.
  awk 'BEGIN {FS=": "}/^Version/{print $2}'
`

# Get the latest version of Atom.
LATEST_VERSION=`
  # Pipe the download URL to awk.
  echo $DOWNLOAD_URL | \

  # Extract the version from the URL.
  awk -F'/v' '{print $2}' | awk -F'/' '{print $1}'
`
# Check if the latest version is already installed.
if [ "$INSTALLED_VERSION" == "$LATEST_VERSION" ]; then
  echo "Latest stable release, $INSTALLED_VERSION, is already installed."
else
  echo "Downloading Atom from atom.io ..."
  wget https://atom.io/download/deb -O /tmp/atom.deb -q --show-progress

  echo "Updating Atom from $INSTALLED_VERSION to $LATEST_VERSION"
  sudo dpkg -i /tmp/atom.deb

  # Delete the downloaded package from the tmp folder.
  rm /tmp/atom.deb
fi