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Complain when using --pure-eval with --file

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This never worked and cannot work because in pure eval mode, the
evaluator doesn't have access to the file.
This commit is contained in:
Eelco Dolstra 2025-04-30 22:29:27 +02:00
parent 9099b7dd87
commit d46f741cdf
2 changed files with 8 additions and 1 deletions
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6
src/libcmd/installables.cc
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@ -491,7 +491,11 @@ Installables SourceExprCommand::parseInstallables(
throw UsageError("'--file' and '--expr' are exclusive");
// FIXME: backward compatibility hack
if (file) evalSettings.pureEval = false;
if (file) {
if (evalSettings.pureEval && evalSettings.pureEval.overridden)
throw UsageError("'--file' is not compatible with '--pure-eval'");
evalSettings.pureEval = false;
}
auto state = getEvalState();
auto vFile = state->allocValue();

3
tests/functional/eval.sh
View file

@ -39,6 +39,9 @@ nix-instantiate --eval -E 'assert 1 + 2 == 3; true'
ln -sfn cycle.nix "$TEST_ROOT/cycle.nix"
(! nix eval --file "$TEST_ROOT/cycle.nix")
# --file and --pure-eval don't mix.
expectStderr 1 nix eval --pure-eval --file "$TEST_ROOT/cycle.nix" | grepQuiet "not compatible"
# Check that relative symlinks are resolved correctly.
mkdir -p "$TEST_ROOT/xyzzy" "$TEST_ROOT/foo"
ln -sfn ../xyzzy "$TEST_ROOT/foo/bar"