Add a script to check that all binaries exist on the system, for all …

…languages we handle.

check_for_all_binaries.rb

@@ -0,0 +1,32 @@
+#!/usr/bin/env ruby
+# Goes through all languages and makes sure that all needed binaries exist to
+# evaluate code in it.
+
+$LOAD_PATH.unshift File.dirname(__FILE__)
+require 'eval/eval'
+require 'eval/config'
+require 'eval/languages'
+
+missing_binaries = []
+
+Language.languages.each do |language, values|
+  if values[:special]
+    missing_binaries << "[special] #{language}"
+    next
+  end
+
+  sandbox = Sandbox.new(Language.by_name(language))
+  if sandbox.binaries_all_exist?
+    print '.'
+    sleep 0.005
+  else
+    print '!'
+    sleep 0.05
+    missing_binaries << language
+  end
+end
+
+puts
+
+puts "Languages missing binaries:"
+puts missing_binaries.join("\n")

eval/eval.rb

@@ -180,6 +180,19 @@ def pastebin(credentials = {})
     "Output truncated: #{paste['url']} (#{@result.lines.count} lines of total output)"
   end
 
+  # Public: Checks to make sure all needed binaries to perform an evaluation
+  #         (@binaries_must_exist) exist and are located in a directory that
+  #         is in $PATH.
+  #
+  # Returns false if a needed binary doesn't exist, and true if they all do.
+  def binaries_all_exist?
+    @binaries_must_exist.each do |binary|
+      next if File.exists? binary
+      return false unless ENV['PATH'].split(':').any? { |path| File.exists? File.join(path, '/', binary) }
+    end
+    true
+  end
+
   private
 
   # Internal: Copies evaluated code to someplace safe, for audit purposes.
@@ -193,19 +206,6 @@ def copy_audit_script
     FileUtils.cp("#{@home}/#{@script_filename}", "#{@path}/evaluated/#{@time.year}-#{@time.month}-#{@time.day}_#{@time.hour}-#{@time.min}-#{@time.sec}-#{@owner}-#{@time.to_f}.#{@extension}")
   end
 
-  # Internal: Checks to make sure all needed binaries to perform an evaluation
-  #           (@binaries_must_exist) exist and are located in a directory that
-  #           is in $PATH.
-  #
-  # Returns false if a needed binary doesn't exist, and true if they all do.
-  def binaries_all_exist?
-    @binaries_must_exist.each do |binary|
-      next if File.exists? binary
-      return false unless ENV['PATH'].split(':').any? { |path| File.exists? File.join(path, '/', binary) }
-    end
-    true
-  end
-
   # Internal: Takes the code that we are about to evaluate, and actually puts it
   #           in the file, so that we can...evaluate it.
   #