karabiner-elements+hammerspoon

README

Recently, I have had difficulty using karabiner-elements to bind
caps_lock to cmd+ctrl+alt, i.e., without shift.

I got it working recently, but docs seem to take me there in a
haphazard way. I contend that the karabiner-elements
documentation is not completely clear on what to do.

If one gets stuck, you might look at
https://github.com/tekezo/Karabiner-Elements/issues/1225, or
request there to clarify further, or open similar issue.

caps_lock->command+option+control.json

// ~/.config/karabiner/assets/complex_modifications/caps_lock->command+option+control.json
{
  "title": "Change caps_lock key to control+option+command.",
  "rules": [
    {
      "description": "Change caps_lock key to control+option+command.",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "caps_lock",
            "modifiers": {
              "optional": [
                "any"
              ]
            }
          },
          "to": [
            {
              "key_code": "left_command",
              "modifiers": [
                "left_control",
                "left_option"
              ]
            }
          ]
        }
      ]
    }
  ]
}

init.lua

-- ~/.hammerspoon/init.lua

hs.loadSpoon("WinWin")

mash = {"cmd", "ctrl", "alt"}
mash_shift = {"cmd", "ctrl", "alt", "shift"}

for k, v in pairs({
      c = "Google Chrome",
      e = "/Applications/Emacs.app",
      r = "Riot",
      t = "Terminal",
                 })
do
   hs.hotkey
      .bind(mash, k,
            function()
               hs.application.launchOrFocus(v)
            end
   )
end

for k, v in pairs({
      h = "left",
      j = "down",
      k = "up",
      l = "right",
}) do
   local f0 = function() spoon.WinWin:stepMove(v) end
   local f1 = function() spoon.WinWin:stepResize(v) end
   hs.hotkey.bind(mash, k, f0, nil, f0)
   hs.hotkey.bind(mash_shift, k, f1, nil, f1)
end

hs.hotkey.bind(mash, "f", function()
                  local win = hs.window.focusedWindow()
                  win:setFullScreen(not win:isFullScreen())
end)

hs.alert.show("Config loaded")