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In checkOverlay, accept underscored names for final/prev args.

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Resolves #4416.
This commit is contained in:
Christopher League 2021-11-03 09:25:27 -04:00
parent 133905b309
commit 3f070cc417
1 changed files with 6 additions and 2 deletions
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8
src/nix/flake.cc
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@ -346,10 +346,14 @@ struct CmdFlakeCheck : FlakeCommand
auto checkOverlay = [&](const std::string & attrPath, Value & v, const Pos & pos) {
try {
state->forceValue(v, pos);
if (!v.isLambda() || v.lambda.fun->hasFormals() || std::string(v.lambda.fun->arg) != "final")
if (!v.isLambda() || v.lambda.fun->hasFormals() ||
(std::string(v.lambda.fun->arg) != "final" &&
std::string(v.lambda.fun->arg) != "_final"))
throw Error("overlay does not take an argument named 'final'");
auto body = dynamic_cast<ExprLambda *>(v.lambda.fun->body);
if (!body || body->hasFormals() || std::string(body->arg) != "prev")
if (!body || body->hasFormals() ||
(std::string(body->arg) != "prev" &&
std::string(body->arg) != "_prev"))
throw Error("overlay does not take an argument named 'prev'");
// FIXME: if we have a 'nixpkgs' input, use it to
// evaluate the overlay.