[OC-3564] move core Chef to the repo root \o/ \m/

The opscode/chef repository now only contains the core Chef library code
used by chef-client, knife and chef-solo!

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/chef/cookbook/remote_file_vendor.rb b/lib/chef/cookbook/remote_file_vendor.rb
new file mode 100644
index 0000000000..49de62cf65
--- /dev/null
+++ b/lib/chef/cookbook/remote_file_vendor.rb
@@ -0,0 +1,84 @@
+#
+# Author:: Tim Hinderliter (<tim@opscode.com>)
+# Copyright:: Copyright (c) 2010 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.
+#
+
+require 'chef/cookbook/file_vendor'
+
+class Chef
+  class Cookbook
+    # == Chef::Cookbook::RemoteFileVendor
+    # This FileVendor loads files by either fetching them from the local cache, or
+    # if not available, loading them from the remote server.
+    class RemoteFileVendor < FileVendor
+
+      def initialize(manifest, rest)
+        @manifest = manifest
+        @cookbook_name = @manifest[:cookbook_name]
+        @rest = rest
+      end
+
+      # Implements abstract base's requirement. It looks in the
+      # Chef::Config.cookbook_path file hierarchy for the requested
+      # file.
+      def get_filename(filename)
+        if filename =~ /([^\/]+)\/(.+)$/
+          segment = $1
+        else
+          raise "get_filename: Cannot determine segment/filename for incoming filename #{filename}"
+        end
+
+        raise "No such segment #{segment} in cookbook #{@cookbook_name}" unless @manifest[segment]
+        found_manifest_record = @manifest[segment].find {|manifest_record| manifest_record[:path] == filename }
+        raise "No such file #{filename} in #{@cookbook_name}" unless found_manifest_record
+
+        cache_filename = File.join("cookbooks", @cookbook_name, found_manifest_record['path'])
+
+        # update valid_cache_entries so the upstream cache cleaner knows what
+        # we've used.
+        validate_cached_copy(cache_filename)
+
+        current_checksum = nil
+        if Chef::FileCache.has_key?(cache_filename)
+          current_checksum = Chef::CookbookVersion.checksum_cookbook_file(Chef::FileCache.load(cache_filename, false))
+        end
+
+        # If the checksums are different between on-disk (current) and on-server
+        # (remote, per manifest), do the update. This will also execute if there
+        # is no current checksum.
+        if current_checksum != found_manifest_record['checksum']
+          raw_file = @rest.get_rest(found_manifest_record[:url], true)
+
+          Chef::Log.debug("Storing updated #{cache_filename} in the cache.")
+          Chef::FileCache.move_to(raw_file.path, cache_filename)
+        else
+          Chef::Log.debug("Not fetching #{cache_filename}, as the cache is up to date.")
+          Chef::Log.debug("current checksum: #{current_checksum}; manifest checksum: #{found_manifest_record['checksum']})")
+        end
+
+        full_path_cache_filename = Chef::FileCache.load(cache_filename, false)
+
+        # return the filename, not the contents (second argument= false)
+        full_path_cache_filename
+      end
+
+      def validate_cached_copy(cache_filename)
+        CookbookCacheCleaner.instance.mark_file_as_valid(cache_filename)
+      end
+
+    end
+  end
+end