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summary: Experimental features are exported by snapd
details: |
Some of the experimental features are exported as flag files that can be
easily read by snap-confine and snap-update-ns that otherwise don't have
access to the system state.
execute: |
# When a feature that is exported is enabled, a file is created.
snap set core experimental.per-user-mount-namespace=true
test -f /var/lib/snapd/features/per-user-mount-namespace
# When a feature that is exported is disabled, a file is removed.
snap set core experimental.per-user-mount-namespace=false
test ! -f /var/lib/snapd/features/per-user-mount-namespace
# When a feature that is not exported is enabled, a file is not created.
snap set core experimental.layouts=true
test ! -f /var/lib/snapd/features/layouts
# Features are exported when snapd starts up
snap set core experimental.parallel-instances=true
test -f /var/lib/snapd/features/parallel-instances
systemctl stop snapd
rm /var/lib/snapd/features/parallel-instances
systemctl start snapd
test -f /var/lib/snapd/features/parallel-instances
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