source common.sh requireDaemonNewerThan "2.8pre20220311" enableFeatures "ca-derivations impure-derivations" restartDaemon clearStore # Basic test of impure derivations: building one a second time should not use the previous result. printf 0 > $TEST_ROOT/counter # `nix derivation add` with impure derivations work drvPath=$(nix-instantiate ./impure-derivations.nix -A impure) nix derivation show $drvPath | jq .[] > $TEST_HOME/impure-drv.json drvPath2=$(nix derivation add < $TEST_HOME/impure-drv.json) [[ "$drvPath" = "$drvPath2" ]] # But only with the experimental feature! expectStderr 1 nix derivation add < $TEST_HOME/impure-drv.json --experimental-features nix-command | grepQuiet "experimental Nix feature 'impure-derivations' is disabled" nix build --dry-run --json --file ./impure-derivations.nix impure.all json=$(nix build -L --no-link --json --file ./impure-derivations.nix impure.all) path1=$(echo $json | jq -r .[].outputs.out) path1_stuff=$(echo $json | jq -r .[].outputs.stuff) [[ $(< $path1/n) = 0 ]] [[ $(< $path1_stuff/bla) = 0 ]] [[ $(nix path-info --json $path1 | jq .[].ca) =~ fixed:r:sha256: ]] path2=$(nix build -L --no-link --json --file ./impure-derivations.nix impure | jq -r .[].outputs.out) [[ $(< $path2/n) = 1 ]] # Test impure derivations that depend on impure derivations. path3=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out) [[ $(< $path3/n) = X2 ]] path4=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out) [[ $(< $path4/n) = X3 ]] # Test that (self-)references work. [[ $(< $path4/symlink/bla) = 3 ]] [[ $(< $path4/self/n) = X3 ]] # Input-addressed derivations cannot depend on impure derivations directly. (! nix build -L --no-link --json --file ./impure-derivations.nix inputAddressed 2>&1) | grep 'depends on impure derivation' drvPath=$(nix eval --json --file ./impure-derivations.nix impure.drvPath | jq -r .) [[ $(nix derivation show $drvPath | jq ".[\"$drvPath\"].outputs.out.impure") = true ]] [[ $(nix derivation show $drvPath | jq ".[\"$drvPath\"].outputs.stuff.impure") = true ]] # Fixed-output derivations *can* depend on impure derivations. path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out) [[ $(< $path5) = X ]] [[ $(< $TEST_ROOT/counter) = 5 ]] # And they should not be rebuilt. path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out) [[ $(< $path5) = X ]] [[ $(< $TEST_ROOT/counter) = 5 ]] # Input-addressed derivations can depend on fixed-output derivations that depend on impure derivations. path6=$(nix build -L --no-link --json --file ./impure-derivations.nix inputAddressedAfterCA | jq -r .[].outputs.out) [[ $(< $path6) = X ]] [[ $(< $TEST_ROOT/counter) = 5 ]] # Test nix/fetchurl.nix. path7=$(nix build -L --no-link --print-out-paths --expr "import { impure = true; url = file://$PWD/impure-derivations.sh; }") cmp $path7 $PWD/impure-derivations.sh