Class: FiltriCmd

Inherits:
Object
  • Object
show all
Defined in:
lib/filtri/command.rb

Class Method Summary collapse

Class Method Details

.parse_opts ⇒ Object 



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# File 'lib/filtri/command.rb', line 6

def self.parse_opts
  options = {}

  OptionParser.new do |o|
    o.banner = "Usage: filtri [options] [input]"
    o.separator ""
    o.separator "Options:"

    o.on("-r", "--rule STRING", "Single rule") do |rule|
      if options.include?(:rules)
        options[:rules] << rule
      else
        options[:rules] = [rule]
      end
    end

    o.on("-f", "--file RULE_FILE", "File containing rules") do |rule_files|
      if options.include?(:rule_files)
        options[:rule_files] << rule_files
      else
        options[:rule_files] = [rule_files]
      end
    end

    o.on( '-v', '--version', 'Version information' ) do
      puts "version #{Filtri::VERSION}"
      exit
    end

    o.on( '-h', '--help', 'Help' ) do
      puts o
      exit
    end



  end.parse!

  options[:input] = ARGV unless ARGV.length <= 0
  options

end

.run(rules, input) ⇒ String

Apply rules to the provided input

Parameters:

  • rules (Hash{Symbol => Array<String>}) —

    Where :rules contain single rule strings and :rule_files contain filename(s) of the rule file(s)

  • input (Array<String>) —

    Where :input contain the input file(s)

Returns:

  • (String) —

    The rules applied to the input

Raises:

  • (FiltriInitError, IOError) —

    if an error occurs when initialising the rules from the provided strings or files



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# File 'lib/filtri/command.rb', line 78

def self.run(rules, input)
  rule_strs  = rules[:rules] || []
  rule_files = rules[:rule_files] || []
  result = []


  # Allow for shorthand format of rules

  upd_rule_strs = rule_strs.reduce([]) do |r,v|
    if v =~ /^(#{Filtri.valid_rules.join("|")})/
      r << v
    else
      r << "rule #{v}"
    end
  end
  f = Filtri.new
  if upd_rule_strs.length > 0
    f.add_rule_str(upd_rule_strs.join("\n"))
  end

  rule_files.each do |rf|
    f.load rf
  end

  ARGV.replace(input || [])
  result << f.apply(ARGF.read)

  result.join("")
end

.validate_opts(opts) ⇒ Object 



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# File 'lib/filtri/command.rb', line 49

def self.validate_opts(opts)


  unless opts.include?(:rules) || opts.include?(:rule_files)
    $stderr.puts "Error: provide a rule or a rule file."
    return false
  end

  [:rule_files, :input].each do |f|
    if opts.include?(f)
      opts[f].each do |i|
        unless File.exist?(i)
          $stderr.puts "Error: file #{i} does not exist."
          return false
        end
      end
    end
  end

  true

end