nix-super/tests/user-envs-migration.sh

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# Test that the migration of user environments
# (https://github.com/NixOS/nix/pull/5226) does preserve everything
source common.sh
if isDaemonNewer "2.4pre20211005"; then
skipTest "Daemon is too new"
fi
killDaemon
unset NIX_REMOTE
clearStore
clearProfiles
rm -rf ~/.nix-profile
# Fill the environment using the older Nix
PATH_WITH_NEW_NIX="$PATH"
export PATH="$NIX_DAEMON_PACKAGE/bin:$PATH"
nix-env -f user-envs.nix -i foo-1.0
nix-env -f user-envs.nix -i bar-0.1
# Migrate to the new profile dir, and ensure that everythings there
export PATH="$PATH_WITH_NEW_NIX"
nix-env -q # Trigger the migration
( [[ -L ~/.nix-profile ]] && \
[[ $(readlink ~/.nix-profile) == ~/.local/share/nix/profiles/profile ]] ) || \
fail "The nix profile should point to the new location"
(nix-env -q | grep foo && nix-env -q | grep bar && \
[[ -e ~/.nix-profile/bin/foo ]] && \
[[ $(nix-env --list-generations | wc -l) == 2 ]]) ||
fail "The nix profile should have the same content as before the migration"