#!/bin/rc

# This script will remove any deleted scripts/dirs previously copied into $1
# If a directory is present, has previously been copied into $1,
# but no longer contains any executable scripts, this will also be removed.

bin = $1

touch .installed .dirsmade
installed = `$nl{cat .installed}
dirsmade  = `$nl{cat .dirsmade}

fn sigexit {
	if (~ $clean_installed ()) {
		rm .installed
	} else {
		{for (s in $clean_installed) { echo $s }} > .installed
	}

	if (~ $clean_dirsmade ()) {
		rm .dirsmade
	} else {
		{for (d in $clean_dirsmade) { echo $d }} > .dirsmade
	}
}

for (s in $installed) {
	p = $bin/$s
	if (test -f $s && test -x $s) {
		clean_installed = ($clean_installed $s)
	} else {
		echo RM $p
		rm $p
		removed = ($removed $p)
	}
}

fn check_dir_used {
	d = $1 {
		for (s in $clean_installed) {
			ds = `$nl{dirname $s}
			if (!~ $ds '.') {
				p = '.'
				for (e in `$nl'/'{echo $ds}) {
					p = $p/$e
					if (~ `$nl{echo $p | sed 's/^\.\///'} $d){
						return 0
					}
				}
			}
		}
	}
	return 1
}

for (d in $dirsmade) {
	p = $bin/$d
	if (test -d $d && check_dir_used $d) {
		clean_dirsmade = ($clean_dirsmade $d)
	} else {
		echo RMDIR $p
		rmdir $p
		removed = ($removed $p)
	}
}

if (~ $removed ()) {
	echo nothing to clean
}