Invalid multibyte char (UTF-8) with image file or font file

[plevavas]

I try to use a custom template. It works. But, for example, when i use this font https://www.google.com/fonts/specimen/PT+Sans. I have no issue with the regular style. But if i add the bold or italic style in the resources directory, i have this issue :

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/erb.rb:849:in `eval': (erb):34: invalid multibyte char (UTF-8) (SyntaxError)
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/erb.rb:849:in `result'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/string_renderer.rb:8:in `render'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:74:in `render_template'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:66:in `move_template'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:48:in `block in copy_template_directory'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/find.rb:43:in `block in find'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/find.rb:42:in `catch'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/find.rb:42:in `find'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:46:in `copy_template_directory'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:15:in `generate'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:58:in `move_template'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:32:in `add_file'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:24:in `create_tree'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:44:in `block (2 levels) in create_groups_for_tree'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:43:in `each'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:43:in `block in create_groups_for_tree'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:37:in `each_pair'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:37:in `create_groups_for_tree'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:26:in `create_tree'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:12:in `block (2 levels) in create_project'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:11:in `each'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:11:in `block in create_project'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:10:in `each'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/project_builder.rb:10:in `create_project'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/launchpad.rb:63:in `generate_project'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/launchpad.rb:15:in `block in liftoff'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:5:in `chdir'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/file_manager.rb:5:in `create_project_dir'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/launchpad.rb:14:in `liftoff'
    from /usr/local/Cellar/liftoff/1.5.0/rubylib/liftoff/cli.rb:10:in `run'
    from /usr/local/bin/liftoff:14:in `<main>'

Here, my liftoffrc :

... 
app_target_templates:
  objc:
    - <%= project_name %>:
      - Resources

[gfontenot]

Makes sense. I think we're basically assuming text-based templates, not binaries. I'd be willing to bet that this is because we're trying to pass the font through ERB, but I'd need to investigate.

[plevavas]

I did some test. If i modify string_renderer.rb to catch SyntaxError exception, it works :

def render(string)
  begin
    ERB.new(string).result(@config.get_binding)
    rescue SyntaxError
      puts "We can't apply template on this file."
    end
  end
end

I don't know if it's the best solution for this issue, or if it's better to check before if the file is a binary. I know that copy font files isn't common. But i have the same issue with some images that was in Images.xcassets.

Edit :

In fact, files are corrupt after that. So, it doesn't work.