Re: Packaging ‘clang-tools-extra’ (‘clang-tidy’, etc.)

[Ludovic Courtès]

Hi,

Ludovic Courtès <ludovic.courtes@inria.fr> skribis:

> The patch below produces a ‘clang’ package that contains
> ‘clang-tools-extra’ commands¹.
>
> The problem is the size.  Before:
>
> $ guix size /gnu/store/qxdpxbvfdxfy5dnz4haql4xlxpmb5r6b-clang-10.0.0 |tail -1
> total: 995.2 MiB
> $ guix size /gnu/store/qxdpxbvfdxfy5dnz4haql4xlxpmb5r6b-clang-10.0.0 |head -2
> store item                                                       total    self
> /gnu/store/qxdpxbvfdxfy5dnz4haql4xlxpmb5r6b-clang-10.0.0           995.2   
> 456.5  45.9%
>
>
> After:
>
> $ guix size /gnu/store/5h3xgpg33wip2b8ccri690jp6ikbq16s-clang-10.0.0 |tail -1
> total: 1525.4 MiB
> $ guix size /gnu/store/5h3xgpg33wip2b8ccri690jp6ikbq16s-clang-10.0.0 |head -2
> store item                                                       total    self
> /gnu/store/5h3xgpg33wip2b8ccri690jp6ikbq16s-clang-10.0.0          1525.4   
> 986.8  64.7%
>
> (How they manage to fill that much disk space, I wonder.)
>
> Any idea how to best package it?
>
> We could of course have a ‘clang-full’ package, but it seems wasteful.
> We could also have a separate output for the extra commands, but it’s
> inconvenient.  It would be ideal to have a ‘clang-tools-extra’ package
> that depends on ‘clang’, but building them separately appears to be
> impossible.

After spending an unreasonable amount of time trying to build
‘clang-tools-extra’ as a separate package, I gave up and went for the
multiple output solution in commit
77a87ad4aceed9d89d615540e0fd147e3a8b2f64.  One can now get ‘clang-tidy’
and its friends with:

  guix install clang:extra

Ludo’.