Bug 692836 – =sys-cluster/singularity-2.6.1 - One or more empty directories installed to /var: /var/lib /var/lib/singularity /var/lib/singularity/mnt /var/lib/singularity/mnt/container /var/lib/singularity/mnt/final /var/lib/singularity/mnt/overlay [...]

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Oliver Freyermuth 2019-08-24 18:41:16 UTC]

From the build log:

 * One or more empty directories installed to /var:
 * 
 *   /var/lib
 *   /var/lib/singularity
 *   /var/lib/singularity/mnt
 *   /var/lib/singularity/mnt/container
 *   /var/lib/singularity/mnt/final
 *   /var/lib/singularity/mnt/overlay
 *   /var/lib/singularity/mnt/session
 * 
 * If those directories need to be preserved, please make sure to create
 * or mark them for keeping using 'keepdir'. Future versions of Portage
 * will strip empty directories from installation image.

Current versions of portage already strip these (I tested with 2.3.73), leading to breakage of the package at runtime:

$ sudo singularity build -s ubuntu ubuntu.def
Using container recipe deffile: ubuntu.def
ERROR  : Failed to resolve path to /var/lib/singularity/mnt/container: No such file or directory
ABORT  : Retval = 255
Cleaning up...

[Comment 1 Jeroen Roovers (RETIRED) 2019-08-25 07:26:40 UTC]

One or more empty directories installed to /var: /var/lib /var/lib/singularity /var/lib/singularity/mnt /var/lib/singularity/mnt/container /var/lib/singularity/mnt/final /var/lib/singularity/mnt/overlay /var/lib/singularity/mnt/session

[Comment 2 Marek Szuba 2020-07-22 12:05:01 UTC]

Solved in version-3 ebuilds + removed version-2 ones.