On 16 May 2016, at 11:18, Jacob Carlborg wrote:

Cap’n Proto is now available in MacPorts (capnproto). It would be nice if TextMate automatically could identify Cap’n Proto when it's installed in MacPorts.

Have a look at how libressl_prefix is done in the configure script.

There is already a capnp_prefix variable, but no check to try and find cap’n’proto from neither MacPorts nor Homebrew (though it doesn’t appear the latter has cap’n’proto).