Add --with-wrapper option to template wrapper biogems

lib/bio-gem/mod/jeweler.rb

@@ -31,6 +31,7 @@ def initialize(options = {})
         development_dependencies << ["activesupport", ">= 3.0.7"]
         development_dependencies << ["sqlite3", ">= 1.3.3"]
       end
+      development_dependencies << ['systemu', '>=2.5.2'] if options[:wrapper]
     end
 
     alias original_project_name project_name  

lib/bio-gem/mod/jeweler/options.rb

@@ -62,6 +62,10 @@ def initialize(args)
             self[:biogem_db] = true
           end
 
+          o.on('--with-wrapper', 'setup the biogem to be a wrapper around a command line application') do
+            self[:wrapper] = true
+          end
+
           o.separator ""
 
           o.separator "These options are for Jeweler"

lib/bio-gem/templates/lib/plugin.rb

@@ -1,3 +1,19 @@
-module <%= constant_name %>
+<% if options[:wrapper] %>require 'systemu'
+<% end %>
 
+module <%= constant_name %>
+<% if options[:wrapper] %>
+  class Wrapper
+    def run
+      command = "some_application arguments"
+      status, stdout, stderr = systemu command, 0 => 'dummy stdin'
+      if status.exitstatus != 0
+         $stderr.puts "Failed to run wrapping command correctly, as non-zero exit status "+
+           "#{status.exitstatus} detected. Command run was `#{command}'"
+      else
+        # All good. Now to something useful with the stdout..
+      end
+    end
+  end
+<% end %>
 end

test/test_bio-gem.rb

@@ -5,6 +5,12 @@
 
 class TestBiorubyGem < Test::Unit::TestCase
   TEST_DIR = 'test/bioruby-biogem-test'
+  def basic_generated_files(project_name)
+    %W(Gemfile lib lib/bio-#{project_name}.rb LICENSE.txt Rakefile README.rdoc test test/helper.rb test/test_bio-#{project_name}.rb).map do |file_name_to_test|
+      File.join("bioruby-#{project_name}",file_name_to_test)
+    end
+  end
+
   def setup
     # check and create test directory
      FileUtils.rm_rf(TEST_DIR) if Dir.exist?(TEST_DIR)
@@ -21,11 +27,23 @@ def test_create_basic_project
     project_name = "biogem-test"
     Dir.chdir(TEST_DIR) do
       application_exit = Bio::Gem::Generator::Application.run!("--no-create-repo", "--user-name=\"fake_name\"", "--user-email=\"fake_email\"", "--github-username=\"fake_github_user\"","#{project_name}")
-      files_tested = %W(Gemfile lib lib/bio-#{project_name}.rb LICENSE.txt Rakefile README.rdoc test test/helper.rb test/test_bio-#{project_name}.rb).map do |file_name_to_test|
-        File.exist?(File.join("bioruby-#{project_name}",file_name_to_test))
+      basic_generated_files(project_name).each do |path| 
+        assert File.exist?(path), path
       end
-      assert_equal [true, true, true, true, true, true, true, true, true], files_tested
     end
 
   end
+
+  def test_create_wrapper_project
+    project_name = "biogem-test2"
+    Dir.chdir(TEST_DIR) do
+      application_exit = Bio::Gem::Generator::Application.run!('--with-wrapper',"--no-create-repo", "--user-name=\"fake_name\"", "--user-email=\"fake_email\"", "--github-username=\"fake_github_user\"","#{project_name}")
+      basic_generated_files(project_name).each do |path| 
+        assert File.exist?(path), path
+      end
+      assert File.read(File.join("bioruby-#{project_name}",'lib',"bio-#{project_name}","#{project_name}.rb")).match(/require 'systemu'/)
+      assert File.read(File.join("bioruby-#{project_name}",'lib',"bio-#{project_name}","#{project_name}.rb")).match(/systemu command/)
+      assert File.read(File.join("bioruby-#{project_name}",'Gemfile')).match(/gem "systemu"/)
+    end    
+  end
 end