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#! /usr/bin/ruby -p
BEGIN {
require 'optparse'
vpath = ["."]
header = nil
opt = OptionParser.new do |o|
o.on('-v', '--vpath=DIR') {|dirs| vpath.concat dirs.split(File::PATH_SEPARATOR)}
header = o.order!(ARGV).shift
end or abort opt.opt_s
TOKENS = {}
vpath.find do |dir|
begin
h = File.read(File.join(dir, header))
rescue Errno::ENOENT
nil
else
h.scan(/^#define\s+RUBY_TOKEN_(\w+)\s+(\d+)/) do |token, id|
TOKENS[token] = id
end
true
end
end or abort "#{header} not found in #{vpath.inspect}"
TOKENS_RE = /\bRUBY_TOKEN\((#{TOKENS.keys.join('|')})\)\s*(?=\s)/
}
$_.gsub!(TOKENS_RE) {TOKENS[$1]} if /^%token/ =~ $_
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