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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 < $TEST_HOME/impure-drv.json --experimental-features nix-command | grepQuiet "experimental Lix feature 'impure-derivations' is disabled"
nix build --dry-run --json --file ./impure-derivations.nix impure.all
json=$(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 ]]
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