source common.sh export NIX_TESTS_CA_BY_DEFAULT=1 drvPath=$(nix-instantiate ../simple.nix) nix derivation show $drvPath | jq .[] > $TEST_HOME/simple.json drvPath2=$(nix derivation add < $TEST_HOME/simple.json) [[ "$drvPath" = "$drvPath2" ]] # Content-addressed derivations can be renamed. jq '.name = "foo"' < $TEST_HOME/simple.json > $TEST_HOME/foo.json drvPath3=$(nix derivation add --dry-run < $TEST_HOME/foo.json) # With --dry-run nothing is actually written [[ ! -e "$drvPath3" ]] # Without --dry-run it is actually written drvPath4=$(nix derivation add < $TEST_HOME/foo.json) [[ "$drvPath4" = "$drvPath3" ]] [[ -e "$drvPath3" ]] # The modified derivation read back as JSON matches nix derivation show $drvPath3 | jq .[] > $TEST_HOME/foo-read.json diff $TEST_HOME/foo.json $TEST_HOME/foo-read.json