SNAP_COMMON and experimental.parallel-instances

3

Thank you for trying out the feature. We have tried to make the parallel instances setup transparent for the applications. We expect the developers to use $SNAP_DATA and $SNAP_COMMON, but in the event that some snap is using a hardcoded the path to /var/snap/<snapname>/{common,<rev>}, the mount namespace of a parallel installed snap is setup such that things should work seamlessly.

As described in Parallel Installs when you snap is named foo_bar, then the following apply:

  • $SNAP_COMMON is set to /var/snap/foo/common and shows the content of /var/snap/foo_bar/common
  • $SNAP_DATA is /var/snap/foo/<rev> and shows the content of /var/snap/foo_bar/<rev>

If you need to know the instance key, there are $SNAP_INSTANCE_NAME and $SNAP_INSTANCE_KEY environment variables. HTH

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