initial

cli/shell.nix

@@ -0,0 +1,38 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+
+let
+  name = "shell";
+  cfg = config.nixowos.cli.${name};
+
+  # use a more verbose output style for nix than default
+  # only lix supports log-format = multiline-with-logs
+  logFormat = if config.nixowos.system.lix.enable then "multiline-with-logs" else "bar-with-logs";
+in
+{
+  options.nixowos.cli.${name} = {
+    enable = lib.mkEnableOption name;
+  };
+
+  config = lib.mkIf cfg.enable {
+    # use Fish, the nicest shell :)
+    programs.fish.enable = true;
+    users.defaultUserShell = pkgs.fish;
+    # avoid generating caches (enabled by fish) due to slowdowns during nixos-rebuild
+    # this may degrade autocompletion
+    documentation.man.generateCaches = false;
+
+    environment.shellAliases = {
+      # make nix-shell preserve the user's $SHELL
+      nix-shell = /* sh */ ''nix-shell --command "export SHELL=$SHELL; $SHELL"'';
+
+      nixos-rebuild = /* sh */ "nixos-rebuild --ask-sudo-password --log-format ${logFormat}";
+
+      nix = /* sh */ "nix --log-format ${logFormat}";
+    };
+  };
+}