#set /augeas/load/Interfaces/incl /interfaces*
#load
defvar base /files//interfaces

# Locate back interface
defvar back $base/iface[gateway = '1.1.1.1' or count(up[. =~ regexp('ip route add 10.0.0.0/8 via 1.1.1.1.*') and count(self[. =~ regexp('ip route add 10.0.0.0/8.* table.*')]) = 0]) = 1]

match $back

# If it exists, remove gateway
rm $back/gateway

print $back

# If it does not exist, add 10/8 route
defvar need10 $back[count(up[. =~ regexp('ip route add 10.0.0.0/8 via 1.1.1.1.*')]) - count(up[. =~ regexp('ip route add 10.0.0.0/8 via 1.1.1.1.* table.*')]) = 0]

match $need10

set $need10/up[last()+1] 'ip route add 10.0.0.0/8 via 1.1.1.1'

print $back

# If it does not exist, add 192.168/16 route
defvar need192 $back[count(up[. =~ regexp('ip route add 192.168.0.0/16 via 1.1.1.1.*')]) - count(up[. =~ regexp('ip route add 192.168.0.0/16 via 1.1.1.1.* table')]) = 0]

match $need192

set $need192/up[last()+1] 'ip route add 192.168.0.0/16 via 1.1.1.1'

# Remove 192.168/20
rm $back/up[. =~ regexp('ip route add 192.168.0.0/20 via 1.1.1.1.*') and              count(self[. =~ regexp('ip route add 192.168.0.0/20.* table.*')]) = 0]

# No 'down ip route del'
rm $base/iface[*]/down[. =~ regexp('ip route del.*')]

save