process SCS_PAGES_DIR etc. env vars equivalently to --pages_dir config option

diff --git a/lib/SCSite.pm b/lib/SCSite.pm
index e1fa5cb..a6b1abf 100755 (executable)
--- a/lib/SCSite.pm
+++ b/lib/SCSite.pm
@@ -158,7 +158,7 @@ sub run_if_script {
   my $class = shift;
   my @config_keys = keys %{{$class->default_config}};
   require Getopt::Long;
-  my %config;
+  my %config = map +($_ => $ENV{"SCS_${\uc $_}"}), @config_keys;
   Getopt::Long::GetOptions(
     map +("$_=s" => \$config{$_}), @config_keys
   );