Added proper mounting to boot.lua; added nogame state

Removed temporary "." mounting from main.c

src/embed/boot.lua

@@ -12,6 +12,23 @@ function love.boot()
       end
     end
   end)
+
+  -- Try to mount .exe file, then the first argument
+  for i, v in ipairs { love.argv[1], love.argv[2] } do
+    local mounted = love.filesystem.mount(v)
+    if mounted then
+      break
+    end
+  end
+
+  -- Load main.lua or init `nogame` state
+  if love.filesystem.isFile("main.lua") then
+    require("main")
+  else
+    love.nogame()
+  end
+
+  love.run()
 end
 
 
@@ -87,5 +104,3 @@ end
 
 
 xpcall(love.boot, love.errhand)
-xpcall(function() require("main") end, love.errhand)
-xpcall(love.run, love.errhand)

src/embed/nogame.lua

@@ -0,0 +1,40 @@
+
+
+function love.nogame()
+
+  function love.load()
+    love.graphics.setBackgroundColor(228, 65, 68)
+  end
+
+  function love.keypressed(key)
+    if key == "escape" then
+      os.exit()
+    end
+  end
+
+  local function drawText(str, y)
+    local screenw = love.graphics.getWidth()
+    local font = love.graphics.getFont()
+    love.graphics.print(str, (screenw - font:getWidth(str)) / 2, y)
+  end
+
+  local function drawLines(ycenter, width, height)
+    local screenw = love.graphics.getWidth()
+    local n = 26
+    for i = 0, n - 1 do
+      local h = height * math.cos(i * 0.3 + love.timer.getTime() * 3) / 2
+      local x = (screenw - width) / 2 + (i / (n - 1)) * width
+      love.graphics.line(x, ycenter, x, ycenter + h)
+    end
+  end
+
+  function love.draw()
+    love.graphics.setColor(255, 255, 255)
+    drawText("LoveDOS " .. love.getVersion(), 62)
+    drawLines(100, 120, 30)
+    drawText("No game", 128)
+    love.graphics.setColor(243, 150, 152)
+    drawText("Press [ESCAPE] to quit", 184)
+  end
+
+end