skim: fix fish shell keybindings

This fixes a typo that prevented the fish keybindings from being loaded.
Also, the keybindings are now only loaded if programs.skim.keybindings
is true, which matches the behavior for bash and zsh.

nixos/modules/programs/skim.nix

@@ -6,7 +6,7 @@ in
 {
   options = {
     programs.skim = {
-      fuzzyCompletion = mkEnableOption (mdDoc "fuzzy Completion with skim");
+      fuzzyCompletion = mkEnableOption (mdDoc "fuzzy completion with skim");
       keybindings = mkEnableOption (mdDoc "skim keybindings");
       package = mkPackageOption pkgs "skim" {};
     };
@@ -26,5 +26,9 @@ in
     '' + optionalString cfg.keybindings ''
       source ${cfg.package}/share/skim/key-bindings.zsh
     '';
+
+    programs.fish.interactiveShellInit = optionalString cfg.keybindings ''
+      source ${cfg.package}/share/skim/key-bindings.fish && skim_key_bindings
+    '';
   };
 }

pkgs/tools/misc/skim/default.nix

@@ -30,9 +30,7 @@ rustPlatform.buildRustPackage rec {
     install -D -m 444 plugin/skim.vim -t $vim/plugin
 
     install -D -m 444 shell/* -t $out/share/skim
-    install -D shell/key-bindings.fish $out/share/fish/vendor_functions.d/sk_key_bindings.fish
-    mkdir -p $out/share/fish/vendor_conf.d
-    echo sk_key_bindings > $out/share/fish/vendor_conf.d/load-sk-key-bindings.fish
+
     installManPage man/man1/*
 
     cat <<SCRIPT > $out/bin/sk-share