refactor(nix/darwin): Swap ESC<->CapsLock with Kanata

include/kanata.kbd

@@ -0,0 +1,22 @@
+(defcfg
+  process-unmapped-keys yes
+)
+
+(defsrc
+  esc   f1   f2   f3   f4   f5   f6   f7   f8   f9   f10  f11  f12
+  grv   1    2    3    4    5    6    7    8    9    0    -    =    bspc
+  tab   q    w    e    r    t    y    u    i    o    p    [    ]
+  caps  a    s    d    f    g    h    j    k    l    ;    '    \    ret
+  lsft  102d z    x    c    v    b    n    m    ,    .    /    rsft
+        lctl lmet lalt           spc            ralt f13  rctl
+)
+
+;; Swap CapsLock with ESC
+(deflayer base
+  caps  f1   f2   f3   f4   f5   f6   f7   f8   f9   f10  f11  f12
+  grv   1    2    3    4    5    6    7    8    9    0    -    =    bspc
+  tab   q    w    e    r    t    y    u    i    o    p    [    ]
+  esc   a    s    d    f    g    h    j    k    l    ;    '    \    ret
+  lsft  102d z    x    c    v    b    n    m    ,    .    /    rsft
+        lctl lmet lalt           spc            ralt f13  rctl
+)

nix/modules/darwin/kanata.nix

@@ -0,0 +1,25 @@
+{ user }:
+
+{ pkgs, ... }:
+
+{
+  launchd.user.agents.kanata = {
+    command = "/usr/bin/sudo ${pkgs.kanata}/bin/kanata -c ${../../../include/kanata.kbd} -n";
+    serviceConfig = {
+      UserName = user;
+      RunAtLoad = true;
+      KeepAlive = {
+        SuccessfulExit = false;
+        Crashed = true;
+      };
+      StandardErrorPath = "/Users/${user}/.logs/kanata.err.log";
+      StandardOutPath = "/Users/${user}/.logs/kanata.out.log";
+      ProcessType = "Interactive";
+      Nice = -30;
+    };
+  };
+
+  security.sudo.extraConfig = ''
+    ${user} ALL=(ALL) NOPASSWD: ${pkgs.kanata}/bin/kanata
+  '';
+}

nix/overlays/darwin/kanata.nix

@@ -0,0 +1,29 @@
+# Because building from source is broken due to `sw_vers` usage
+#
+# REF: https://github.com/NixOS/nixpkgs/pull/306546#issuecomment-2284484876
+# REF: https://github.com/jtroo/kanata/issues/1209
+final: prev:
+
+{
+  kanata = final.stdenv.mkDerivation rec {
+    name = "kanata";
+    version = "v1.7.0";
+
+    src = final.fetchurl {
+      url = "https://github.com/jtroo/kanata/releases/download/${version}/kanata_macos_" +
+        (if final.stdenv.hostPlatform.isAarch64 then "arm64" else "x86_64");
+      sha256 =
+        if final.stdenv.hostPlatform.isAarch64 then
+          "83ad80fbaf8c7b0ec0e17052a02ca0b3057cbbeaf8a023a61541f1514a936b43"
+        else
+          "e3f0d99e512a84c5cae1f63e71c07ecdbff66dc89b053aba0abb4f9dee0cadc0";
+    };
+
+    phases = ["installPhase" "patchPhase"];
+    installPhase = ''
+      mkdir -p $out/bin
+      cp $src $out/bin/kanata
+      chmod +x $out/bin/kanata
+    '';
+  };
+}

nix/systems/darwin/configuration.nix

@@ -58,6 +58,8 @@ in {
 
       pkgs.lf
       pkgs.yazi  # lf replacement, need further testing
+
+      pkgs.kanata
     ];
   environment.extraSetup = ''
     ln -sv ${pkgs.path} $out/nixpkgs

nix/systems/darwin/default.nix

@@ -4,6 +4,10 @@ let
   mkCommon = import ../../lib/mkCommon.nix;
   mkSystem = import ../../lib/mkSystem.nix;
   mkBrew = import ../../overlays/darwin/brew.nix;
+
+  kanataModules = [
+    (import ../../modules/darwin/kanata.nix { user = "ziro"; })
+  ];
 in
 {
   # Host list
@@ -24,6 +28,7 @@ in
             inputs.firefox-darwin.overlay
             (mkBrew { inherit system brew-api; nixpkgs = nixpkgs-stable; })
             (import ../../overlays/darwin/heliport.nix)
+            (import ../../overlays/darwin/kanata.nix)
           ];
           nur = nur;
         }
@@ -37,7 +42,7 @@ in
       modules = [
         inputs.spicetify-nix.nixosModules.default  # Also works on nix-darwin thanks to it being nixosConfiguration replacement for macOS
         ./configuration.nix
-      ];
+      ] ++ kanataModules;
     };
 
   # Imaginary M1, just for reference
@@ -52,6 +57,7 @@ in
           extraOverlays = [
             inputs.firefox-darwin.overlay
             (mkBrew { inherit system brew-api; nixpkgs = nixpkgs-stable; })
+            (import ../../overlays/darwin/kanata.nix)
           ];
           nur = nur;
         }
@@ -65,6 +71,6 @@ in
       modules = [
         inputs.spicetify-nix.nixosModules.default
         ./configuration.nix
-      ];
+      ] ++ kanataModules;
     };
 }

nix/users/default.nix

@@ -28,6 +28,7 @@ in
           extraOverlays = [
             inputs.firefox-darwin.overlay
             (mkBrew { inherit system; inherit (inputs) brew-api; nixpkgs = nixpkgs-stable; })
+            (import ../overlays/darwin/kanata.nix)
           ];
           nur = nur;
         }

nix/users/ziro/darwin.nix

@@ -15,18 +15,18 @@
   home.file."Library/Application Support/Floorp/native-messaging-hosts/passff.json".source = "${pkgs.passff-host}/share/passff-host/passff.json";
 
   # Swap CapsLock with Esc for better vi-mode experience.
-  launchd.agents.CapsEscSwap = {
+  # launchd.agents.CapsEscSwap = {
-    enable = true;
+  #   enable = true;
-    config = {
+  #   config = {
-      ProgramArguments = [
+  #     ProgramArguments = [
-        "/usr/bin/hidutil"
+  #       "/usr/bin/hidutil"
-        "property"
+  #       "property"
-        "--set"
+  #       "--set"
-        ''{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x700000039,"HIDKeyboardModifierMappingDst":0x700000029},{"HIDKeyboardModifierMappingSrc":0x700000029,"HIDKeyboardModifierMappingDst":0x700000039}]}''
+  #       ''{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x700000039,"HIDKeyboardModifierMappingDst":0x700000029},{"HIDKeyboardModifierMappingSrc":0x700000029,"HIDKeyboardModifierMappingDst":0x700000039}]}''
-      ];
+  #     ];
-      RunAtLoad = true;
+  #     RunAtLoad = true;
-    };
+  #   };
-  };
+  # };
 
   home.sessionVariables.MOZ_LEGACY_PROFILES = 1;