[TxMt] force unknown file type to open

[Allan Odgaard]

On 4 Apr 2008, at 18:47, Rob McBroom wrote:

> [...] the Leopard upgrade "broke" TextMate's attempt to take them over
>
> [...] it looks like Apple has taken the ability to do inappropriate  
> things with file types out of the hands of developers, so you might  
> be out of luck.

TextMate declares that it can handle public.data, there is nothing  
inappropriate about that, nor is it an attempt to take over all your  
file types, it’s to tell the system that TextMate _can_ handle all  
your file types (this information is not only used for double-clicks  
in Finder, it is also used e.g. when dragging a file on top of an  
application icon to decide whether or not a drop should be allowed).

The problem is that the file type system in OS X is extension based,  
and while this system is fully configurable (by the user) for files  
with extension, finding the application to open for files _without_ an  
extension is based on a heuristic which got changed in Leopard.