lix/tests/functional/repl_characterization/data/repl_overlays.test

Check basic `repl-overlays` functionality.
@args --repl-overlays
@args ${PWD}/extra_data/repl-overlay-packages-is-pkgs.nix
  nix-repl> pkgs
  { default = "my package"; }
Add `repl-overlays` Adds a `repl-overlays` option, which specifies files that can overlay and modify the top-level bindings in `nix repl`. For example, with the following contents in `~/.config/nix/repl.nix`: info: final: prev: let optionalAttrs = predicate: attrs: if predicate then attrs else {}; in optionalAttrs (prev ? legacyPackages && prev.legacyPackages ? ${info.currentSystem}) { pkgs = prev.legacyPackages.${info.currentSystem}; } We can run `nix repl` and use `pkgs` to refer to `legacyPackages.${currentSystem}`: $ nix repl --repl-overlays ~/.config/nix/repl.nix nixpkgs Lix 2.90.0 Type :? for help. Loading installable 'flake:nixpkgs#'... Added 5 variables. Loading 'repl-overlays'... Added 6 variables. nix-repl> pkgs.bash «derivation /nix/store/g08b5vkwwh0j8ic9rkmd8mpj878rk62z-bash-5.2p26.drv» Change-Id: Ic12e0f2f210b2f46e920c33088dfe1083f42391a 2024-04-04 23:26:25 +00:00			Check basic `repl-overlays` functionality.
			`@args --repl-overlays`
			`@args ${PWD}/extra_data/repl-overlay-packages-is-pkgs.nix`
			`nix-repl> pkgs`
			`{ default = "my package"; }`