ruby/tool/leaked-globals

#!/usr/bin/ruby
require_relative 'lib/colorize'

until ARGV.empty?
  case ARGV[0]
  when /\ASYMBOL_PREFIX=(.*)/
    SYMBOL_PREFIX = $1
  when /\ANM=(.*)/              # may be multiple words
    NM = $1
  else
    break
  end
  ARGV.shift
end

config = ARGV.shift
count = 0
col = Colorize.new
REPLACE = File.read(config).scan(/\bAC_(?:REPLACE|CHECK)_FUNCS?\(\K\w+/)
print "Checking leaked global symbols..."
STDOUT.flush
IO.foreach("|#{NM} -Pgp #{ARGV.join(' ')}") do |line|
  n, t, = line.split
  next unless /[BDT]/ =~ t
  next unless n.sub!(/^#{SYMBOL_PREFIX}/o, "")
  next if n.include?(".")
  next if /\A(?:Init_|InitVM_|ruby_|rb_|[Oo]nig|st_|dln_|mjit_|coroutine_|nu(?:comp|rat)_)/ =~ n
  next if REPLACE.include?(n)
  puts col.fail("leaked") if count.zero?
  count += 1
  puts "  #{n}"
end
case count
when 0
  puts col.pass("none")
when 1
  abort col.fail("1 un-prefixed symbol leaked")
else
  abort col.fail("#{count} un-prefixed symbols leaked")
end