Add Ruby language file for compiler_vm (#36)

Add Ruby language file for compiler_vm

modules/compiler_vm/languages/ruby.pm

@@ -0,0 +1,69 @@
+#!/usr/bin/perl
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+use warnings;
+use strict;
+
+package ruby;
+use parent '_default';
+
+use Text::ParseWords qw(shellwords);
+
+sub initialize {
+  my ($self, %conf) = @_;
+
+  $self->{sourcefile}      = 'prog.rb';
+  $self->{execfile}        = 'prog.rb';
+  $self->{default_options} = '-w';
+  $self->{cmdline}         = 'ruby $options $sourcefile';
+
+  if (length $self->{arguments}) {
+    $self->{cmdline} .= " $self->{arguments}";
+  }
+}
+
+sub preprocess_code {
+  my $self = shift;
+  $self->SUPER::preprocess_code;
+
+  if (defined $self->{arguments}) {
+    my @args = shellwords($self->{arguments});
+    my $prelude .= "\nmy \$arglen = " . (scalar @args) . ";\n";
+
+    if (@args) {
+      $prelude .= "my \@args = (";
+
+      my $comma = "";
+      foreach my $arg (@args) {
+        $arg = quotemeta $arg;
+        $prelude .= "$comma\"$arg\"";
+        $comma = ", ";
+      }
+
+      $prelude .= ");\n";
+    } else {
+      $prelude .= "my \@args;\n";
+    }
+
+    $self->{code} = "$prelude\n$self->{code}";
+  }
+}
+
+sub postprocess_output {
+  my $self = shift;
+  $self->SUPER::postprocess_output;
+
+  $self->{output} =~ s/\s+at $self->{sourcefile} line \d+, near ".*?"//;
+  $self->{output} =~ s/\s*Execution of $self->{sourcefile} aborted due to compilation errors.//;
+
+  $self->{cmdline_opening_comment} = "=cut =============== CMDLINE ===============\n";
+  $self->{cmdline_closing_comment} = "=cut\n";
+
+  $self->{output_opening_comment} = "=cut =============== OUTPUT ===============\n";
+  $self->{output_closing_comment} = "=cut\n";
+}
+
+1;