Checks for available package updates in CentOS

package_updates_centos.py

# Run in Docker
# docker run -v /home/martin/temp/:/var/scripts -i -t centos:latest python /var/scripts/packagecentos.py

import subprocess
import re



installed_packages_dict = {}
installed_packages = subprocess.Popen(["yum",'--color=never','list', 'installed'], stdout=subprocess.PIPE, close_fds=True,
						).communicate()[0]


for index, line in enumerate(installed_packages.splitlines()):
	regex = re.compile('^(.*?)\s+(.*?)\s+@(.*)$')
	match = regex.match(line)
	if match:
		name, version, repo = match.groups()
		installed_packages_dict[name] = version



packages_for_upgrade_list = []
packages_for_upgrade = subprocess.Popen(["yum",'check-update'], stdout=subprocess.PIPE, close_fds=True,
						).communicate()[0]


for index, line in enumerate(packages_for_upgrade.splitlines()):
	regex = re.compile('^(\S+\.\S+)\s+(\S+)\s+\S+$')
	match = regex.match(line)
	if match:
		name, new_version = match.groups()

		# Check if this version is new 
		currently_installed_version = installed_packages_dict.get(name)
		if currently_installed_version != None:

			if currently_installed_version != new_version:
				
				package_dict = {'name': name, 
					'current_version': currently_installed_version,
					'new_version': new_version
				}
				
				packages_for_upgrade_list.append(package_dict)
		

print packages_for_upgrade_list