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d12c4452a4
Fixes guix/guix#2410. Until now, ‘guix shell’ and ‘guix time-machine’ would store GC roots under ~/.cache/guix. However, this directory is unreadable to guix-daemon when it’s running without root privileges. This commit changes ‘guix shell’ and ‘guix time-machine’ so they store GC roots under /var/guix/profiles/per-user/$USER, in a world-readable directory. An added benefit is that, in cluster setups, user homes no longer need to be mounted on the head node for GC to work (assuming ‘guix build -r’ and similar are not used). * guix/inferior.scm (%inferior-cache-directory): Change default value to be under ‘%profile-directory’. (%legacy-inferior-cache-directory): New variable. (cached-channel-instance): Add ‘maybe-remove-expired-cache-entries’ call. * guix/scripts/environment.scm (launch-environment/container)[nesting-mappings]: Add /inferiors and /profiles sub-directories of ‘%profile-directory’. Call ‘mkdir-p’ for these two directories. * guix/scripts/shell.scm (%profile-cache-directory): Change default value to be under ‘%profile-directory’. (%legacy-cache-directory): New variable. (guix-shell): Add call to ‘maybe-remove-expired-cache-entries’. Change-Id: Ie7d6c16a55b35c7beb18078c967d6fc902bf68d0 Signed-off-by: Ludovic Courtès <ludo@gnu.org>