Hammerspoon config file for getting Hyper Key (Caps) to work on Sierra

## init.lua
-- My own config file to get the Hyper Key working again with my current setup.
-- All credit goes to @prenagha and @ttscoff for their awesome original code that I tweaked for my own devices.
-- Credit 1: https://gist.github.com/ttscoff/cce98a711b5476166792d5e6f1ac5907
-- Credit 2: https://gist.github.com/prenagha/1c28f71cb4d52b3133a4bff1b3849c3e

-- A global variable for the sub-key Hyper Mode

k = hs.hotkey.modal.new({}, 'F17')

-- Hyper-key for all the below are setup somewhere... Usually Keyboard Maestro or similar. Alfred doesn't handle them very well, so will set up separate bindings for individual apps below.

hyperBindings = {'c','m','a','b','d','e','f','g','h','i','j','k','l','m','n','p','q','r','t','1','2','3','4','5','6','7','8','9','0','d','g','s','f','TAB','v','b','O','-','s'}

for i,key in ipairs(hyperBindings) do
  k:bind({}, key, nil, function() hs.eventtap.keyStroke({'cmd','alt','shift','ctrl'}, key)
    k.triggered = true
  end)
end

-- Code to launch single apps that Alfred used to handle.
-- Hat-Tip: https://gist.github.com/ttscoff/cce98a711b5476166792d5e6f1ac5907

launch = function(appname)
  hs.application.launchOrFocus(appname)
  k.triggered = true
end

-- Keybinding for specific single apps.

singleapps = {
  {'o', '1Password 6'},
}

for i, app in ipairs(singleapps) do
  k:bind({}, app[1], function() launch(app[2]); k:exit(); end)
end

-- Enter Hyper Mode when F18 is pressed

pressedF18 = function()
  k.triggered = false
  k:enter()
end

-- Leave Hyper Mode when F18 is pressed,
--   send ESCAPE if no other keys are pressed.

releasedF18 = function()
  k:exit()
  if not k.triggered then
    hs.eventtap.keyStroke({}, 'ESCAPE')
  end
end

-- Bind the Hyper key

f19 = hs.hotkey.bind({}, 'F18', pressedF18, releasedF18)

-- Reload config when any lua file in config directory changes, to save having to manually reload.

function reloadConfig(files)
    doReload = false
    for _,file in pairs(files) do
        if file:sub(-4) == '.lua' then
            doReload = true
        end
    end
    if doReload then
        hs.reload()
    end
end
local myWatcher = hs.pathwatcher.new(os.getenv('HOME') .. '/.hammerspoon/', reloadConfig):start()
hs.alert.show('Config loaded')