Gem::Installer
# File bundler/rubygems_gem_installer.rb, line 21 def build_extensions extension_cache_path = options[:bundler_extension_cache_path] return super unless extension_cache_path && extension_dir = Bundler.rubygems.spec_extension_dir(spec) extension_dir = Pathname.new(extension_dir) build_complete = SharedHelpers.filesystem_access(extension_cache_path.join("gem.build_complete"), :read, &:file?) if build_complete && !options[:force] SharedHelpers.filesystem_access(extension_dir.parent, &:mkpath) SharedHelpers.filesystem_access(extension_cache_path) do FileUtils.cp_r extension_cache_path, spec.extension_dir end else super if extension_dir.directory? # not made for gems without extensions SharedHelpers.filesystem_access(extension_cache_path.parent, &:mkpath) SharedHelpers.filesystem_access(extension_cache_path) do FileUtils.cp_r extension_dir, extension_cache_path end end end end