systemd.rb
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systemd.rb
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	# Fact: systemd
	#
	# Purpose:
	# Determine whether systemd is the init system on the node
	#
	# Resolution:
	# Check if the service_provider fact is systemd
	#
	# Caveats:
	# If you override the service provider then it will return false, even if the
	# underlying system still is systemd.
	#

	# Fact: systemd_version
	#
	# Purpose:
	# Determine the version of systemd installed
	#
	# Resolution:
	# Check the output of systemctl --version
	#
	# Caveats:
	#

	# Fact: systemd_internal_services
	#
	# Purpose:
	# List all systemd internal real services + their state
	#
	# Resolution:
	# Check the output of systemctl --list-unit-files systemd-* and parse it into
	# a hash with the status
	#
	# Caveats:
	#
	Facter.add(:systemd) do
	confine kernel: :linux
	setcode do
	Facter.value(:service_provider) == 'systemd'
	end
	end

	Facter.add(:systemd_version) do
	confine systemd: true
	setcode do
	Facter::Util::Resolution.exec("systemctl --version \| awk '/systemd/{ print $2 }'")
	end
	end

	Facter.add(:systemd_internal_services) do
	confine systemd: true
	setcode do
	command_output = Facter::Util::Resolution.exec(
	'systemctl list-unit-files --no-legend --no-pager "systemd-*" -t service --state=enabled,disabled,enabled-runtime,indirect'
	)
	lines = command_output.lines.lazy.map { \|line\| line.split(%r{\s+}) }
	lines.each_with_object({}) do \|(service, status, *), result\|
	result[service] = status
	end
	end
	end