def candidate_version
return @candidate_version if @candidate_version
status = popen4("pacman -Ss #{@new_resource.package_name}") do |pid, stdin, stdout, stderr|
stdout.each do |line|
case line
when /^(extra|core|community)\/#{Regexp.escape(@new_resource.package_name)} (.+)$/
@candidate_version = $2.split(" ").first
end
end
end
unless status.exitstatus == 0 || status.exitstatus == 1
raise Chef::Exceptions::Package, "pacman failed - #{status.inspect}!"
end
unless @candidate_version
raise Chef::Exceptions::Package, "pacman does not have a version of package #{@new_resource.package_name}"
end
@candidate_version
end