source common.sh clearStore happy () { # We can do a read-only query just fine with a read-only store nix --store local?read-only=true path-info $dummyPath # We can "write" an already-present store-path a read-only store, because no IO is actually required nix-store --store local?read-only=true --add dummy } ## Testing read-only mode without forcing the underlying store to actually be read-only # Make sure the command fails when the store doesn't already have a database expectStderr 1 nix-store --store local?read-only=true --add dummy | grepQuiet "database does not exist, and cannot be created in read-only mode" # Make sure the store actually has a current-database, with at least one store object dummyPath=$(nix-store --add dummy) # Try again and make sure we fail when adding a item not already in the store expectStderr 1 nix-store --store local?read-only=true --add eval.nix | grepQuiet "attempt to write a readonly database" # Test a few operations that should work with the read-only store in its current state happy ## Testing read-only mode with an underlying store that is actually read-only # Ensure store is actually read-only chmod -R -w $TEST_ROOT/store chmod -R -w $TEST_ROOT/var # Make sure we fail on add operations on the read-only store # This is only for adding files that are not *already* in the store expectStderr 1 nix-store --add eval.nix | grepQuiet "error: opening lock file '$(readlink -e $TEST_ROOT)/var/nix/db/big-lock'" expectStderr 1 nix-store --store local?read-only=true --add eval.nix | grepQuiet "Permission denied" # Test the same operations from before should again succeed happy