execline-state

in spite of skarnet's "execline maintains no state"

a simple shift register built on piperw(1)

usage

init-state <name>
load-state <name> <target>
save-state <name> <value>

#!/bin/execlineb

init-state flip
save-state flip "up"
forstdin -E line
	load-state flip current
	println "! state: $current"
	ifelse { s6-test "$line" = "flip" } {
		println "! flipping state"
		ifelse { s6-test "$current" = "up" } {
			save-state flip "down"
		}
		save-state flip "up"
	}
	save-state flip "$current"