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Versions: 14
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# Copyright (c) 2020 Contrast Security, Inc. See https://www.contrastsecurity.com/enduser-terms-0317a for more details.
# frozen_string_literal: true
cs__scoped_require 'singleton'
cs__scoped_require 'contrast/utils/object_share'
module Contrast
module Utils
# Utility methods for building and caching hashes from strings
class Sha256Builder
include Singleton
def initialize
@sha256_cache = {}
@gem_hash_cache = {}
end
# Return a list of "source" files. Ignore metadata files as well as files
# in the spec, test or exe directories. Could potentially miss important
# files but good enough for the time being.
PATHS = '{lib,bin,ext}/**/*.{rb,c,h,c++,cpp,java,rs}'
def files path
if Dir.exist?(path)
Dir.glob(File.join(path, PATHS))
else
[]
end
end
# Generate a SHA256 hash of the combined source code of this Gem
def sha256 path
return nil unless path
return nil unless File.exist?(path) && !File.directory?(path)
@sha256_cache[path] ||= Digest::SHA256.file(path).to_s
end
def build_from_spec spec
name = spec.file_name.to_s
cached = @gem_hash_cache[name]
return cached if cached
gem_path = File.join(cache_dir(spec), name)
hash = sha256(gem_path)
@gem_hash_cache[name] = hash
hash
end
def cache_dir spec
gems_dir = spec.gems_dir
parent_dir = File.dirname(gems_dir)
File.join(parent_dir, Contrast::Utils::ObjectShare::CACHE)
end
def self.files path
instance.files(path)
end
def self.sha256 path
instance.sha256(path)
end
def self.build_from_spec spec
instance.build_from_spec(spec)
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems