[bug#29181] [PATCH core-updates 0/1] Shrink Mesa

[Ludovic Courtès]

Hello Guix!

This patch divides the nar size of ‘mesa’ (as reported by ‘guix size’)
almost by a factor of four.  It does so by replacing hard links created
upon “make install” with symlinks.

The new post-install phase prints things like:

--8<---------------cut here---------------start------------->8---
starting phase `symlinks-instead-of-hard-links'
creating 7 symlinks to 
'/gnu/store/l1iwgjgp88snlzp9nafdpd0vvsqv7lsi-mesa-17.2.1/lib/dri/i915_dri.so'
creating 3 symlinks to 
'/gnu/store/l1iwgjgp88snlzp9nafdpd0vvsqv7lsi-mesa-17.2.1/lib/dri/i965_dri.so'
creating 1 symlinks to 
'/gnu/store/l1iwgjgp88snlzp9nafdpd0vvsqv7lsi-mesa-17.2.1/lib/dri/nouveau_drv_video.so'
creating 1 symlinks to 
'/gnu/store/l1iwgjgp88snlzp9nafdpd0vvsqv7lsi-mesa-17.2.1/lib/libXvMCnouveau.so.1.0.0'
creating 2 symlinks to 
'/gnu/store/l1iwgjgp88snlzp9nafdpd0vvsqv7lsi-mesa-17.2.1/lib/vdpau/libvdpau_nouveau.so.1.0.0'
phase `symlinks-instead-of-hard-links' succeeded after 0.0 seconds
--8<---------------cut here---------------end--------------->8---

The nar size does not reflect disk usage since deduplication would
recreate the hard links anyway, but it reflects how much we have to
transfer over the wire since the nar format does not represent hard
links.  A similar problem arose with Git a while back, see
<https://bugs.gnu.org/21949>.

I’d like to push to ‘core-updates’.

Thoughts?

Ludo’.

Ludovic Courtès (1):
  gnu: mesa: Use symlinks instead of hard links.

 gnu/packages/gl.scm | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

-- 
2.14.2