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#!/usr/bin/ruby
require 'find'
require 'optparse'
options = {}
OptionParser.new do |opts|
opts.banner = "Usage: clean-header-guards [options]"
opts.on("--prefix [PREFIX]", "Append a header prefix to all guards") do |prefix|
options[:prefix] = prefix
end
end.parse!
IgnoredFilenamePatterns = [
# ignore headers which are known not to have guard
/WebCorePrefix/,
/ForwardingHeaders/,
%r|bindings/objc|,
/vcproj/, # anything inside a vcproj is in the windows wasteland
# we don't own any of these headers
%r|icu/unicode|,
%r|platform/graphics/cairo|,
%r|platform/image-decoders|,
/config.h/ # changing this one sounds scary
].freeze
IgnoreFileNamesPattern = Regexp.union(*IgnoredFilenamePatterns).freeze
Find::find(".") do |filename|
next unless filename =~ /\.h$/
next if filename.match(IgnoreFileNamesPattern)
File.open(filename, "r+") do |file|
contents = file.read
match_results = contents.match(/#ifndef (\S+)\n#define \1/s)
if match_results
current_guard = match_results[1]
new_guard = File.basename(filename).sub('.', '_')
new_guard = options[:prefix] + '_' + new_guard if options[:prefix]
contents.gsub!(/#{current_guard}\b/, new_guard)
else
puts "Ignoring #{filename}, failed to find existing header guards."
end
tmp_filename = filename + ".tmp"
File.open(tmp_filename, "w+") do |new_file|
new_file.write(contents)
end
File.rename tmp_filename, filename
end
end
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