Re: [gentoo-user] Applying patches without needing overlays and modifying ebuilds

[Peter Alfredsen <loki_val@gentoo.org>]

On Sun, 17 May 2009 09:42:20 +0100
Neil Bothwick <neil@digimed.co.uk> wrote:

> I think you can redefine ebuild functions
> in /etc/portage/env/cat/pkg, so you could out a custom src_unpack()
> in there. It should work if the ebuild has no src_unoack, so you
> could do something like
> 
> src_unpack() {
> 	unpack ${A}
> 	epatch mypatch
> }
> 
> I don't know how this would work with an existing src_unpack in the
> ebuild, if you copied the existing function and added your patch.

I use /etc/portage/bashrc for the same purpose. For instance, this is a
patch I'm tacking onto portage ATM:

if [[ ${CATEGORY}/${PN} == sys-apps/portage ]]
then
        post_src_unpack() {
                cd "${S}"/bin
                epatch "/etc/portage/patches/misc-functions.patch"
        }
fi

As you can see, there are post_ and pre_ phases for all phase functions
which can be used to do fancy stuff like this.

I prefer /etc/portage/bashrc for this, since these hacks are usually
only needed for a short time, so having them all in one place for an
easy overview helps to keep the cruft down.

/loki_val