Hammerspoon config

init.lua

-- Config for https://github.com/Hammerspoon/hammerspoon

local function keyStroke(mod, key)
  return function() hs.eventtap.keyStroke(mod, key) end
end

local function remap(appName, mod1, key1, mod2, key2)
  if (not appName) then
    return hs.hotkey.bind(mod1, key1, keyStroke(mod2, key2))
  end

  local hotkey = hs.hotkey.new(mod1, key1, keyStroke(mod2, key2))
  return hs.window.filter.new(appName)
    :subscribe(hs.window.filter.windowFocused,   function() hotkey:enable()  end)
    :subscribe(hs.window.filter.windowUnfocused, function() hotkey:disable() end)
end

-- global remap
remap(nil, {'ctrl'}, '[', {}, 'escape')

-- remap for Slack.app
-- see also: http://blog.glidenote.com/blog/2014/08/06/custom-keybind-for-slack/
remap('Slack', {'ctrl'}, 'p', {'alt'},          'up')
remap('Slack', {'ctrl'}, 'n', {'alt'},          'down')
remap('Slack', {'alt'},  'a', {'alt', 'shift'}, 'down')