1 files changed, 56 insertions, 0 deletions
diff --git a/lib/chef/checksum/storage/filesystem.rb b/lib/chef/checksum/storage/filesystem.rb
new file mode 100644
index 0000000000..7500a5ad85
--- /dev/null
+++ b/lib/chef/checksum/storage/filesystem.rb
@@ -0,0 +1,56 @@
+#
+# Author:: Tim Hinderliter (<tim@opscode.com>)
+# Copyright:: Copyright (c) 2011 Opscode, Inc.
+# 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.
+
+class Chef
+  class Checksum
+    class Storage
+      class Filesystem
+        def initialize(base_dir, checksum)
+          @base_dir = base_dir
+          @checksum = checksum
+        end
+
+        def file_location
+          File.join(checksum_repo_directory, @checksum)
+        end
+        alias :to_s :file_location
+
+        def checksum_repo_directory
+          File.join(Chef::Config.checksum_path, @checksum[0..1])
+        end
+
+        def commit(sandbox_file)
+          FileUtils.mkdir_p(checksum_repo_directory)
+          File.rename(sandbox_file, file_location)
+        end
+
+        def revert(original_committed_file_location)
+          File.rename(file_location, original_committed_file_location)
+        end
+
+        # Deletes the file backing this checksum from the on-disk repo.
+        # Purging the checksums is how users can get back to a valid state if
+        # they've deleted files, so we silently swallow Errno::ENOENT here.
+        def purge
+          FileUtils.rm(file_location)
+        rescue Errno::ENOENT
+          true
+        end
+      end
+    end
+  end
+end