extract and dedup suppressions in valgrind suppressions files

dedup.rb

#!/usr/bin/env ruby
# frozen_string_literal: true

def parse_suppressions(data)
  state = :idle
  current = nil
  result = []

  data.lines.each do |line|
    case state
    when :idle
      if line == "{\n"
        current = []
        state = :suppression
      end

    when :suppression
      if line == "}\n"
        result << current
        current = nil
        state = :idle
      else
        current << line
      end
    end
  end

  result
end

all = []
ARGV.each do |a|
  all.concat parse_suppressions(File.read(a))
end

all.sort!
all.uniq!
all.each do |s|
  puts '{'
  puts s
  puts '}'
end