Maximilian Bosch 559fd7ffe7 nix flake check: improve error message if overlay is not a lambda (#8582) ... * nix flake check: improve error message if overlay is not a lambda Suppose you have an overlay like this { inputs = { /* ... */ }; outputs = { flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system: { overlays.default = final: prev: { }; }); } then `nix flake check` (correctly) fails because `overlays` are supposed to have the structure `overlays.<name> = final: prev: exp`. However, the error-message is a little bit counter-intuitive: error: overlay does not take an argument named 'final' While one might guess where the error actually comes from because the trace above says `… while checking the overlay 'overlays.x86_64-linux'` this is still pretty confusing because it complains about an argument not being named `final` even though that's evidently the case. With this change, the error-message actually makes it clear what's wrong: [ma27@carsten:~/Projects/nix/tmp]$ nix flake check --extra-experimental-features 'nix-command flakes' path:$(pwd) error: … while checking flake output 'overlays' at /nix/store/clgblnxx003hyrq8qkz5ab6kgqkck6qc-source/flake.nix:4:5: 3| outputs = { ... }: { 4| overlays.x86_64-linux.snens = final: prev: { | ^ 5| kek = throw "snens"; … while checking the overlay 'overlays.x86_64-linux' at /nix/store/clgblnxx003hyrq8qkz5ab6kgqkck6qc-source/flake.nix:4:5: 3| outputs = { ... }: { 4| overlays.x86_64-linux.snens = final: prev: { | ^ 5| kek = throw "snens"; error: overlay is not a lambda, but a set instead		2023-06-27 14:58:29 +02:00
..
absolute-paths.sh
build-paths.sh	Make more string values work as installables	2023-05-15 09:03:38 -04:00
bundle.sh
check.sh	nix flake check: improve error message if overlay is not a lambda (#8582)	2023-06-27 14:58:29 +02:00
circular.sh
common.sh	Cleanup test skipping	2023-03-16 18:43:03 -04:00
config.sh
flake-in-submodule.sh	tests/flake-in-submodule: Remove unnecessary rm -rf	2023-03-18 14:39:38 +01:00
flakes.sh	Add dirtyRev and dirtyShortRev to fetchGit	2023-06-24 14:17:25 +10:00
follow-paths.sh	Harden tests' bash	2023-03-08 10:26:30 -05:00
init.sh
inputs.sh	flakes: Differentiate self.outPath and self.sourceInfo.outPath	2023-02-22 03:31:24 +01:00
mercurial.sh	Cleanup test skipping	2023-03-16 18:43:03 -04:00
run.sh
search-root.sh
show.sh	tests/flakes/show.sh: Broaden requirement comment	2023-03-27 05:11:23 +02:00
unlocked-override.sh