Changes to flatpak-builder on master

[Christian Hergert]

On 02/16/2017 07:12 AM, Alexander Larsson wrote:
> I just pushed a rework of the cache for flatpak-builder to master. It
> now always builds with the install directory containing files that are
> hardlinked into the cache. This means checking out, as well as checking
> in is much faster. The first since its a hardlink instead of a copy,
> and the second because we don't have to calculate sha256 checksum on
> commit for the files that are already in the cache.
>
> However, since the files are in the cache it is absolutely forbidden to
> do in-place modifications of them, as it would break the cache ostree
> repo. So, we use the rofiles-fuse filesystem to expose a copy of the
> checkout where all hardlinked files are read-only. This required some
> fixes in flatpak-builder where we did in-place editing, and it *may*
> cause problems for third party json apps if the build of a module does
> in-place modifications of files from another module. This is unlikely,
> but *might* happen, so please test your json files.

It looks like maybe Python violates the use of proper rename() support? 
easy-install.pth failures are causing Builder nightly builds to fail 
(thanks Tristan for tracking this down since we aren't getting IRC 
notifications!)

http://sdkbuilder.gnome.org/logs/build-2017-02-20-231004/build-gnome-apps-nightly-master-org.gnome.Builder-x86_64.txt

-- Christian