86 lines
2.1 KiB
Ruby
86 lines
2.1 KiB
Ruby
# frozen_string_literal: true
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module Packages
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module Debian
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class ExtractMetadataService
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include Gitlab::Utils::StrongMemoize
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ExtractionError = Class.new(StandardError)
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def initialize(package_file)
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@package_file = package_file
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end
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def execute
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raise ExtractionError, 'invalid package file' unless valid_package_file?
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extract_metadata
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end
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private
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attr_reader :package_file
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def valid_package_file?
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package_file &&
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package_file.package&.debian? &&
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package_file.file.size > 0 # rubocop:disable Style/ZeroLengthPredicate
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end
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def file_type_basic
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%i[dsc deb udeb buildinfo changes].each do |format|
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return format if package_file.file_name.end_with?(".#{format}")
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end
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nil
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end
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def file_type_source
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# https://manpages.debian.org/buster/dpkg-dev/dpkg-source.1.en.html
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%i[gzip bzip2 lzma xz].each do |format|
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return :source if package_file.file_name.end_with?(".tar.#{format}")
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end
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nil
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end
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def file_type
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strong_memoize(:file_type) do
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file_type_basic || file_type_source || :unknown
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end
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end
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def file_type_debian?
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file_type == :deb || file_type == :udeb
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end
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def file_type_meta?
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file_type == :dsc || file_type == :buildinfo || file_type == :changes
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end
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def fields
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strong_memoize(:fields) do
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if file_type_debian?
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package_file.file.use_open_file(unlink_early: false) do |file|
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::Packages::Debian::ExtractDebMetadataService.new(file.file_path).execute
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end
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elsif file_type_meta?
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package_file.file.use_open_file do |file|
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::Packages::Debian::ParseDebian822Service.new(file.read).execute.each_value.first
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end
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end
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end
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end
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def extract_metadata
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architecture = fields['Architecture'] if file_type_debian?
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{
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file_type: file_type,
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architecture: architecture,
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fields: fields
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}
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end
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end
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end
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end
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