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#
# Author:: Tim Hinderliter (<tim@chef.io>)
# Copyright:: Copyright 2010-2016, Chef Software 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
attr_reader :rest
attr_reader :cookbook_name
def initialize(manifest, rest)
@manifest = manifest
@cookbook_name = @manifest.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.files_for(segment)
found_manifest_record = @manifest.files_for(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 found_manifest_record[:lazy] || current_checksum != found_manifest_record["checksum"]
raw_file = @rest.streaming_request(found_manifest_record[:url])
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
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