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# frozen_string_literal: true
require 'graphql/version'
require 'digest/sha2'
module GraphQL
module Language
class Cache
def initialize(path)
@path = path
end
DIGEST = Digest::SHA256.new << GraphQL::VERSION
def fetch(filename)
hash = DIGEST.dup << filename
begin
hash << File.mtime(filename).to_i.to_s
rescue SystemCallError
return yield
end
cache_path = @path.join(hash.to_s)
if cache_path.exist?
Marshal.load(cache_path.read)
else
payload = yield
tmp_path = "#{cache_path}.#{rand}"
@path.mkpath
File.binwrite(tmp_path, Marshal.dump(payload))
File.rename(tmp_path, cache_path.to_s)
payload
end
end
end
end
end
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