Add language scala

lib/ohai/plugins/scala.rb

@@ -0,0 +1,47 @@
+# Author:: Christopher M Luciano (<cmlucian@us.ibm.com>)
+# © Copyright IBM Corporation 2015.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+Ohai.plugin(:Scala) do
+  provides "languages/scala", "languages/scala/sbt"
+
+  depends "languages"
+
+  collect_data(:default) do
+    # Check for scala
+    begin
+      output = nil
+
+      scala = Mash.new
+      so = shell_out("scala -version")
+      if so.exitstatus == 0
+        output =  so.stdout.split
+        scala[:version] = output[4]
+        languages[:scala] = scala if scala[:version]
+      end
+    end
+
+    # Check for sbt
+    begin
+      output = nil
+
+      so = shell_out("sbt --version")
+      if so.exitstatus == 0
+        output =  so.stdout.split
+        scala[:sbt] = output[3] if scala[:version]
+      end
+    end
+  end
+end

spec/unit/plugins/scala_spec.rb

@@ -0,0 +1,98 @@
+# Author:: Christopher M Luciano (<cmlucian@us.ibm.com>)
+# © Copyright IBM Corporation 2015.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require File.expand_path(File.join(File.dirname(__FILE__), '..', '..', '/spec_helper.rb'))
+
+describe Ohai::System, "plugin scala" do
+
+  let (:plugin) do
+    plugin = get_plugin("scala").tap do |plugin|
+      plugin[:languages] = Mash.new
+    end
+  end
+
+  let(:scala_out) {"Scala code runner version 2.11.6 -- Copyright 2002-2013, LAMP/EPFL"}
+  let(:sbt_out) { "sbt launcher version 0.13.8" }
+
+  def setup_plugin
+    allow(plugin).to receive(:shell_out)
+      .with("scala -version")
+      .and_return(mock_shell_out(0, scala_out, ""))
+    allow(plugin).to receive(:shell_out)
+      .with("sbt --version")
+      .and_return(mock_shell_out(0, sbt_out, ""))
+  end
+
+
+  context " if scala is installed" do
+    before(:each) do
+      setup_plugin
+      plugin.run
+    end
+
+    it "should get the scala version" do
+      expect(plugin).to receive(:shell_out).with("scala -version").and_return(mock_shell_out(0, scala_out, ""))
+      plugin.run
+    end
+
+    it "should set languages[:scala][:version]" do
+      expect(plugin.languages[:scala][:version]).to eql("2.11.6")
+    end
+  end
+
+  context "if sbt is installed" do
+
+    before(:each) do
+      setup_plugin
+      plugin.run
+    end
+
+
+    it "should get the sbt version" do
+      expect(plugin).to receive(:shell_out).with("sbt --version").and_return(mock_shell_out(0, sbt_out, ""))
+      plugin.run
+    end
+
+    it "should set languages[:sbt][:version]" do
+      expect(plugin.languages[:scala][:sbt]).to eql("0.13.8")
+    end
+  end
+
+  context "if scala is not installed" do
+
+    before(:each) do
+      allow(plugin).to receive(:shell_out)
+        .with("scala -version")
+        .and_return(mock_shell_out(1, scala_out, ""))
+      allow(plugin).to receive(:shell_out)
+        .with("sbt --version")
+        .and_return(mock_shell_out(1, sbt_out, ""))
+    end
+
+    it "should not set the languages[:scala] if scala command fails" do
+      allow(plugin).to receive(:shell_out).with("scala -version").and_return(mock_shell_out(1, scala_out, ""))
+      plugin.run
+      expect(plugin.languages).not_to have_key(:scala)
+    end
+
+    it "should not set the languages[:scala] if scala command fails" do
+      allow(plugin).to receive(:shell_out).with("sbt --version").and_return(mock_shell_out(1, scala_out, ""))
+      plugin.run
+      expect(plugin.languages).not_to have_key(:scala)
+    end
+  end
+end