Re: Package definition - argument, fix for wrong file format before unpack

[raingloom]

On Sat, 21 May 2022 20:16:06 +0200
白い熊 <help-guix_gnu.org@sumou.com> wrote:

> Hello everyone:
> 
> I'm trying to build some old apps - one of them is an emacs package
> only available now via the archive.org Wayback machine.
> 
> The problem is though that the download is an xxxx.tar.gz file in
> name - in fact it is really only a tar archive. So guix build fails
> with wrong file format error. Concretely - it is this file: 
> https://web.archive.org/web/20110104020844/http://taiyaki.org/elisp/mell/src/mell-1.0.0.tar.gz
> 
> I think I should add some "(arguments" lines in the package recipe - 
> replacing the unpack phase? However not sure exactly how - am
> searching but haven't found any examples fixing for such a problem.
> 
> Could someone advise me - how to specify the file should be unpacked
> as really just a tar archive so that the build can then proceed?
> 
> Many thanks.
> 

If I remember correctly, the source should get passed as part of the
inputs alist? Try this:
`(replace 'unpack (lambda args (display args)))`
And look at what arguments it gets passed. The store path of the
tarball should be right there.