Re: [Chicken-hackers] Unit files for chicken < 3.4.0

[Ivan Raikov]

  Good idea. Considering that now Chicken 3.3.0 is part of Debian (and
eventually probably a part of Ubuntu), many users would probably run
into this problem. The release/3 repository will go into maintenance
mode once Chicken 4 is ready, so hacks are okay with me.

   -Ivan

Mario Domenech Goulart <address@hidden> writes:

> This problem is very annoying.  To make the transition to the `files'
> unit era transparent to users, I thought about creating a `files' egg
> which only installs something[1] when (chicken-version) < 3.4.0,
> otherwise nothing is installed and the builtin `files' unit is used.
>
> [1] something like (use posix)
>
> So, when we are using chicken < 3.4.0 a files.so file is installed by
> chicken-setup.  The code of this file consists of requiring the
> `posix' unit.  When we have `(use files)' in the code, this extension
> is used.
>
> When we are using chicken >= 3.4.0, no file is installed.  When we
> have `(use files)' in the code, the `files' unit is used.
>
> All the eggs that use procedures from the `files' unit should require
> the `files' egg in their .meta file.
>
> Yes, that's an awful hack...  Any thoughts or better alternatives?