add_to_namespace.rb

#!/usr/bin/ruby
#
# Copyright (c) 2012 Chris Devereux
# All rights reserved.

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met: 

# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer. 
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution. 

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#####################
# add_to_namespace.rb
#####################

if ARGV.count == 0 then
	$stderr.puts "Usage: add_to_namespace [target-header] <[filtered-prefixes, ...]>" 
	exit 1
end


$: << File.dirname(__FILE__)
require 'nstool'

project_dir     = ENV["PROJECT_DIR"]
binary          = File.join(ENV["BUILT_PRODUCTS_DIR"], ENV["FULL_PRODUCT_NAME"])
namespace_def   = File.join(project_dir, "namespace")
target_header   = File.join(project_dir, ARGV[0])
filter_prefixes = ARGV[2..-1] ||= []



if !File.exists?(namespace_def) then
	msg = "// Placeholder for namespace macros. Add a namespace file to the project root to enable.\n"
	exit if File.exists?(target_header) && File.read(target_header) == msg
	File.open(target_header, 'w'){|f| f.write msg }
	exit
end

namespace = File.read(namespace_def).strip
defines = namespace_defines(binary, namespace, filter_prefixes)
existing_defines = File.exists?(target_header) ? File.read(target_header) : ""

if existing_defines != defines then
	File.open(target_header, 'w'){|f| f.write(defines) }
	$stderr.puts("Namespaced files changed. Rebuild is required.")
	exit(2)
end