Class: Packages::Debian::ParseDebian822Service

Inherits:
Object
  • Object
show all
Defined in:
app/services/packages/debian/parse_debian822_service.rb

Overview

Parse String as Debian RFC822 control data format manpages.debian.org/unstable/dpkg-dev/deb822.5

Constant Summary collapse

InvalidDebian822Error = 
Class.new(StandardError)

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ ParseDebian822Service

Returns a new instance of ParseDebian822Service.



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# File 'app/services/packages/debian/parse_debian822_service.rb', line 10

def initialize(input)
  @input = input
end

Instance Method Details

#execute ⇒ Object 



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# File 'app/services/packages/debian/parse_debian822_service.rb', line 14

def execute
  output = {}
  @input.each_line('', chomp: true) do |block|
    section = {}
    section_name, field = nil
    block.each_line(chomp: true) do |line|
      next if comment_line?(line)

      if continuation_line?(line)
        raise InvalidDebian822Error, "Parse error. Unexpected continuation line" if field.nil?

        section[field] += "\n"
        section[field] += line[1..] unless paragraph_separator?(line)
      elsif match = match_section_line(line)
        section_name = match[:name] if section_name.nil?
        field = match[:field]

        raise InvalidDebian822Error, "Duplicate field '#{field}' in section '#{section_name}'" if section.include?(field)

        section[field] = match[:value]
      else
        raise InvalidDebian822Error, "Parse error on line #{line}"
      end
    end

    raise InvalidDebian822Error, "Duplicate section '#{section_name}'" if output[section_name]

    output[section_name] = section
  end

  output
end