CHEF-1914: load all environments with one command

Adds support for:
knife environment from file foo.json bar.json
knife environment from file -a

chef/lib/chef/knife/environment_from_file.rb

@@ -25,26 +25,59 @@ class Chef
         require 'chef/knife/core/object_loader'
       end
 
-      banner "knife environment from file FILE (options)"
+      banner "knife environment from file FILE [FILE..] (options)"
+
+      option :all,
+      :short => "-a",
+      :long  => "--all",
+      :description => "Upload all environments"
 
       def loader
         @loader ||= Knife::Core::ObjectLoader.new(Chef::Environment, ui)
       end
 
+      def environments_path
+        @environments_path ||= "environments"
+      end
 
-      def run
-        if @name_args[0].nil?
-          show_usage
-          ui.fatal("You must specify a file to load")
-          exit 1
-        end
+      def find_all_environments
+        loader.find_all_objects("./#{environments_path}/")
+      end
 
+      def load_all_environments
+        environments = find_all_environments
+        if environments.empty?
+          ui.fatal("Unable to find any environment files in '#{environments_path}'")
+          exit(1)
+        end
+        environments.each do |env|
+          load_environment(env)
+        end
+      end
 
-        updated = loader.load_from("environments", @name_args[0])
+      def load_environment(env)
+        updated = loader.load_from("environments", env)
         updated.save
         output(format_for_display(updated)) if config[:print_after]
         ui.info("Updated Environment #{updated.name}")
       end
+
+        
+      def run
+        if config[:all] == true
+          load_all_environments
+        else
+          if @name_args[0].nil?
+            show_usage
+            ui.fatal("You must specify a file to load")
+            exit 1
+          end
+  
+          @name_args.each do |arg|
+            load_environment(arg)
+          end
+        end
+      end
     end
   end
 end

chef/spec/unit/knife/environment_from_file_spec.rb

@@ -43,6 +43,29 @@ describe Chef::Knife::EnvironmentFromFile do
       @knife.run
     end
 
+    context "when handling multiple environments" do
+      before(:each) do
+        @env_apple = @environment.dup
+        @env_apple.name("apple")
+        @knife.loader.stub!(:load_from).with("apple.rb").and_return @env_apple
+      end
+  
+      it "loads multiple environments if given" do
+        @knife.name_args = [ "spec.rb", "apple.rb" ]
+        @environment.should_receive(:save).twice
+        @knife.run
+      end
+  
+      it "loads all environments with -a" do
+        File.stub!(:expand_path).with("./environments/*.{json,rb}").and_return("/tmp/environments")
+        Dir.stub!(:glob).with("/tmp/environments").and_return(["spec.rb", "apple.rb"])
+        @knife.name_args = []
+        @knife.stub!(:config).and_return({:all => true})
+        @environment.should_receive(:save).twice
+        @knife.run
+      end
+    end
+
     it "should not print the environment" do
       @knife.should_not_receive(:output)
       @knife.run