get_docker_run_flags.rb
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	# frozen_string_literal: true

	require 'shellwords'

	def get_docker_run_flags(args)
	flags = []

	if args['username']
	flags << "-u '#{args['username'].shellescape}'"
	end

	if args['hostname']
	flags << "-h '#{args['hostname'].shellescape}'"
	end

	if args['restart']
	flags << "--restart '#{args['restart']}'"
	end

	if args['net'].is_a? String
	flags << "--net #{args['net']}"
	end

	if args['memory_limit']
	flags << "-m #{args['memory_limit']}"
	end

	cpusets = [args['cpuset']].flatten.compact

	unless cpusets.empty?
	value = cpusets.join(',')
	flags << "--cpuset-cpus=#{value}"
	end

	if args['disable_network']
	flags << '-n false'
	end

	if args['privileged']
	flags << '--privileged'
	end

	if args['health_check_cmd'] && args['health_check_cmd'].to_s != 'undef'
	flags << "--health-cmd='#{args['health_check_cmd']}'"
	end

	if args['health_check_interval'] && args['health_check_interval'].to_s != 'undef'
	flags << "--health-interval=#{args['health_check_interval']}s"
	end

	if args['tty']
	flags << '-t'
	end

	if args['read_only']
	flags << '--read-only=true'
	end

	params_join_char = if args['osfamily'] && args['osfamily'].to_s != 'undef'
	args['osfamily'].casecmp('windows').zero? ? " `\n" : " \\\n"
	else
	" \\\n"
	end

	multi_flags = ->(values, fmt) {
	filtered = [values].flatten.compact
	filtered.map { \|val\| (fmt + params_join_char) % val }
	}

	[
	['--dns %s', 'dns'],
	['--dns-search %s', 'dns_search'],
	['--expose=%s', 'expose'],
	['--link %s', 'links'],
	['--lxc-conf="%s"', 'lxc_conf'],
	['--volumes-from %s', 'volumes_from'],
	['-e "%s"', 'env'],
	['--env-file %s', 'env_file'],
	['-p %s', 'ports'],
	['-l %s', 'labels'],
	['--add-host %s', 'hostentries'],
	['-v %s', 'volumes'],
	].each do \|format, key\|
	values = args[key]
	new_flags = multi_flags.call(values, format)
	flags << new_flags
	end

	args['extra_params'].each do \|param\|
	flags << param if args['param'].to_s != 'undef'
	end

	# Some software (inc systemd) will truncate very long lines using glibc's
	# max line length. Wrap options across multiple lines with '\' to avoid
	flags.flatten.reject { \|val\| val.to_s == 'undef' }.join(params_join_char)
	end

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