indent exim conf if else endif

indent-exim4-conf.pl

#!/usr/bin/perl -n
# argument: /path/to/exim.conf

if (/^\s*\.else/) {
  $spaces=" "x($level-1);
  print $spaces.$_; next;
}
if (/^\s*\.if/) {
  $spaces=" "x$level;
  print $spaces.$_;
  $level++; next;
}
if (/^\s*\.endif/) {
  $level--;
  $spaces=" "x$level;
  print $spaces.$_;
  next;
}
$spaces=" "x$level;
print $spaces.$_;