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# frozen_string_literal: true
module Packages
module Nuget
class ExtractMetadataFileService
ExtractionError = Class.new(StandardError)
MAX_FILE_SIZE = 4.megabytes.freeze
def initialize(package_zip_file)
@package_zip_file = package_zip_file
end
def execute
ServiceResponse.success(payload: nuspec_file_content)
end
private
attr_reader :package_zip_file
def nuspec_file_content
entry = extract_nuspec_file
raise ExtractionError, 'nuspec file not found' unless entry
raise ExtractionError, 'nuspec file too big' if MAX_FILE_SIZE < entry.size
Tempfile.create('nuget_extraction_package_file') do |file|
entry.extract(file.path) { true } # allow #extract to overwrite the file
file.read
end
rescue Zip::EntrySizeError => e
raise ExtractionError, "nuspec file has the wrong entry size: #{e.message}"
end
def extract_nuspec_file
if package_zip_file.is_a?(Zip::InputStream)
while (entry = package_zip_file.get_next_entry) # rubocop:disable Lint/AssignmentInCondition -- Following https://github.com/rubyzip/rubyzip#notes-on-zipinputstream and that's why the disable rubocop rule
break entry if entry.name.end_with?('.nuspec')
end
else
package_zip_file.glob('*.nuspec').first
end
end
end
end
end
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