feat(nix): nix and back again

I tried Nix, but it had too many downsides so I removed it.

1. Didn't like that all files are immutable and simple config changes
need a complete rebuild.
2. Setting up a new Mac didn't work as smoothly as promised. Not worth
the effort.
3. It sucked a lot to always have to type in the password twice on each
darwin-rebuild
4. It solves problems I never had.

.hammerspoon/functions.lua

@@ -0,0 +1,184 @@
+----------------------
+-- Helper Functions --
+----------------------
+
+-- Get list of screens and refresh that list whenever screens are plugged or unplugged:
+local screens = hs.screen.allScreens()
+local screenwatcher = hs.screen.watcher.new(function()
+	screens = hs.screen.allScreens()
+end)
+screenwatcher:start()
+
+-- Move a window a number of pixels in x and y
+function Nudge(xpos, ypos)
+	local win = hs.window.focusedWindow()
+	local f = win:frame()
+	f.x = f.x + xpos
+	f.y = f.y + ypos
+	win:setFrame(f)
+end
+
+-- Resize a window by moving the bottom
+function Yank(xpixels, ypixels)
+	local win = hs.window.focusedWindow()
+	local f = win:frame()
+
+	f.w = f.w + xpixels
+	f.h = f.h + ypixels
+	win:setFrame(f)
+end
+
+-- Resize window for chunk of screen.
+-- For x and y: use 0 to expand fully in that dimension, 0.5 to expand halfway
+-- For w and h: use 1 for full, 0.5 for half
+function Push(x, y, w, h)
+	local win = hs.window.focusedWindow()
+	local f = win:frame()
+	local screen = win:screen()
+	local max = screen:frame()
+
+	f.x = max.x + (max.w * x)
+	f.y = max.y + (max.h * y)
+	f.w = max.w * w
+	f.h = max.h * h
+	win:setFrame(f)
+end
+
+-- Move to monitor x. Checks to make sure monitor exists, if not moves to last monitor that exists
+function MoveToMonitor(x)
+	local win = hs.window.focusedWindow()
+	local newScreen = nil
+	while not newScreen do
+		newScreen = screens[x]
+		x = x - 1
+	end
+
+	win:moveToScreen(newScreen)
+end
+
+-- Move to next screen
+local function moveToNextScreen(win)
+	win = win or window.focusedWindow()
+	win:moveToScreen(win:screen():next())
+end
+
+-- Move to previous screen
+local function moveToPreviousScreen(win)
+	win = win or window.focusedWindow()
+	win:moveToScreen(win:screen():previous())
+end
+
+-- This places a red circle around the mouse pointer
+local mouseCircle = nil
+local mouseCircleTimer = nil
+
+function MouseHighlight()
+	-- Delete an existing highlight if it exists
+	if mouseCircle then
+		mouseCircle:delete()
+		if mouseCircleTimer then
+			mouseCircleTimer:stop()
+		end
+	end
+	-- Get the current co-ordinates of the mouse pointer
+	Mousepoint = hs.mouse.get()
+	-- Prepare a big red circle around the mouse pointer
+	mouseCircle = hs.drawing.circle(hs.geometry.rect(Mousepoint.x - 40, Mousepoint.y - 40, 80, 80))
+	mouseCircle:setStrokeColor({ ["red"] = 1, ["blue"] = 0, ["green"] = 0, ["alpha"] = 1 })
+	mouseCircle:setFill(false)
+	mouseCircle:setStrokeWidth(5)
+	mouseCircle:show()
+
+	-- Set a timer to delete the circle after 3 seconds
+	mouseCircleTimer = hs.timer.doAfter(2, function()
+		mouseCircle:delete()
+	end)
+end
+
+-- Get all valid windows
+function GetAllValidWindows()
+	local allWindows = hs.window.allWindows()
+	local windows = {}
+	local index = 1
+	for i = 1, #allWindows do
+		local w = allWindows[i]
+		if w:screen() then
+			windows[index] = w
+			index = index + 1
+		end
+	end
+	return windows
+end
+
+-- Launch application or toggle it
+function launchToggleApplication(applicationName)
+	local app = hs.application.find(applicationName)
+
+	if app then
+		local appWindows = app:visibleWindows()
+
+		if #appWindows > 0 then
+			local focusedWindow = app:focusedWindow()
+
+			if focusedWindow then
+				if app:isHidden() then
+					app:unhide()
+				else
+					HideApplicationWithAppleScript(app)
+				end
+			else
+				ShowApplicationWithAppleScript(app)
+			end
+		else
+			app:activate()
+		end
+	else
+		hs.application.launchOrFocus(applicationName)
+	end
+end
+
+-- Hide application with AppleScript
+function HideApplicationWithAppleScript(app)
+	local appName = app:name()
+	local hideScript = [[
+        tell application "Finder"
+            set visible of process "%s" to false
+        end tell
+    ]]
+	local formattedScript = string.format(hideScript, appName)
+	hs.osascript.applescript(formattedScript)
+end
+
+-- Show application with AppleScript
+function ShowApplicationWithAppleScript(app)
+	local appName = app:name()
+	local showScript = [[
+        tell application "Finder"
+            set visible of process "%s" to true
+        end tell
+    ]]
+	local formattedScript = string.format(showScript, appName)
+	hs.osascript.applescript(formattedScript)
+end
+
+function Yabai(commands)
+	for _, cmd in ipairs(commands) do
+		os.execute("/opt/homebrew/bin/yabai -m " .. cmd)
+	end
+end
+
+-- Auto Reload Config
+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
+
+hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", ReloadConfig):start()
+hs.alert.show("Hammerspoon")