Re: [gentoo-dev] huse: new helper for low level eclass writers

[Michał Górny]

On Wed, 19 Oct 2011 11:53:07 -0700
Brian Harring <ferringb@×××××.com> wrote:

> On Wed, Oct 19, 2011 at 02:05:50PM -0400, Mike Frysinger wrote:
> > i wrote a new func for toolchain.eclass: huse.  this is because the
> > toolchain.eclass supports multiple versions in parallel, and the
> > IUSE value can vary greatly between them.  so doing `use foo`
> > without checking IUSE first doesn't work.  since i got a request to
> > use this in other eclasses (for the same reason), i figured i'd
> > move it to eutils.eclass so more people can benefit.
> >
> > now that we have "in_iuse" in eutils.eclass (with all the caveats),
> > i'll be adding huse:
> > 	huse() {
> > 		in_iuse $1 || return 1
> > 		use $1
> > 	}
> >
> > any comments before i publish ?
>
> Call it safe_use.

Maybe something off 'default' instead? It could be made a little like
USE defaults, falling back to the default value when USE isn't declared.

-- 
Best regards,
Michał Górny