54 lines
1.3 KiB
Ruby
54 lines
1.3 KiB
Ruby
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# frozen_string_literal: true
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require 'rubygems/package'
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module Packages
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module Helm
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class ExtractFileMetadataService
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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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metadata
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end
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private
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def valid_package_file?
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@package_file &&
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@package_file.package&.helm? &&
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@package_file.file.size > 0 # rubocop:disable Style/ZeroLengthPredicate
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end
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def metadata
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YAML.safe_load(chart_yaml_content)
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rescue Psych::Exception => e
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raise ExtractionError, "Error while parsing Chart.yaml: #{e.message}"
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end
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def chart_yaml_content
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@package_file.file.use_open_file do |file|
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tar_reader = Gem::Package::TarReader.new(Zlib::GzipReader.new(file))
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chart_yaml = tar_reader.find do |entry|
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next unless entry.file?
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entry.full_name.end_with?('/Chart.yaml')
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end
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raise ExtractionError, 'Chart.yaml not found within a directory' unless chart_yaml
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chart_yaml.read
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ensure
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tar_reader.close
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end
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end
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end
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end
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end
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