This FileVendor loads files by either fetching them from the local cache, or if not available, loading them from the remote server.
Implements abstract base’s requirement. It looks in the Chef::Config.cookbook_path file hierarchy for the requested file.
# File lib/chef/cookbook/remote_file_vendor.rb, line 37 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
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