Re: [gentoo-user] Modifying ebuilds, and dependency thoughts between hugin and luminance-hdr.

[Stroller <stroller@stellar.eclipse.co.uk>]

On 24 December 2011, at 20:23, Michael Mol wrote:

> So, media-gfx/luminance-hdr uses hugin's align_image_stack by default.
> Except the ebuild doesn't list a dependency on hugin. I tried
> modifying its ebuild file to add the dependency, but Portage
> complained about a failed digest verification. So I don't know how to
> work around that.

# grep -i overlay /etc/make.conf 
PORTDIR_OVERLAY=/usr/local/portage
# mkdir -p /usr/local/portage/media-gfx/luminance-hdr/
# cp /usr/portage/media-gfx/luminance-hdr/luminance-hdr-2.1.0.ebuild /usr/local/portage/media-gfx/luminance-hdr/
# vi /usr/local/portage/media-gfx/luminance-hdr/luminance-hdr-2.1.0.ebuild
# ebuild /usr/local/portage/media-gfx/luminance-hdr/luminance-hdr-2.1.0.ebuild manifest


> 2) The tool that luminance-hdr needs is a CLI tool. It doesn't need
> the GUI side of hugin. So it should be possible to build that hugin
> tool without the rest of its GUI. Sounds like another USE flag, or
> perhaps splitting align_image_stack into a separate ebuild and having
> both luminance-hdr and hugin pull that in.

Sounds reasonable. Create a new ebuild for Hugin also, and add a USE=-X option.

> 3) Luminance-hdr doesn't *need* hugin; it has a builtin tool that
> fills the same role, but behaves a bit differently. It should be
> perfectly possible to remove hugin's tool from the list of options,
> based on a USE flag.

I'd have current behaviour depend on USE=hugin in that case. USE=-hugin by default.

Stroller.