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# frozen_string_literal: true
module Gitlab
module Ci
module Build
module Artifacts
module Adapters
class GzipStream
attr_reader :stream
InvalidStreamError = Class.new(StandardError)
def initialize(stream)
raise InvalidStreamError, _("Stream is required") unless stream
@stream = stream
end
def each_blob
stream.seek(0)
until stream.eof?
gzip(stream) do |gz|
yield gz.read, gz.orig_name
unused = gz.unused&.length.to_i
# pos has already reached to EOF at the moment
# We rewind the pos to the top of unused files
# to read next gzip stream, to support multistream archives
# https://golang.org/src/compress/gzip/gunzip.go#L117
stream.seek(-unused, IO::SEEK_CUR)
end
end
end
private
def gzip(stream, &block)
gz = Zlib::GzipReader.new(stream)
yield(gz)
rescue Zlib::Error => e
raise InvalidStreamError, e.message
ensure
gz&.finish
end
end
end
end
end
end
end
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