Recompile static vendor project if a header file is modified

Author: I Could Read Have A Book

lib/motion/project/vendor.rb

@@ -114,6 +114,14 @@ def build_static(platform)
  when '.cpp', '.cxx', '.mm'
  cplusplus = true
  @config.locate_compiler(platform, 'clang++', 'g++')
+ when '.h'
+ # If header modified, recompile the associated source file
+ files = source_files.keep_if do |file|
+ File.basename(srcfile, '.*') == File.basename(file, '.*')
+ end
+ files.each { |f| FileUtils.touch(f) }
+ source_files.concat(files)
+ next
  else
  # Not a valid source file, skip.
  next