mvp

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1740126099,
-        "narHash": "sha256-ozoOtE2hGsqh4XkTJFsrTkNxkRgShxpQxDynaPZUGxk=",
+        "lastModified": 1740367490,
+        "narHash": "sha256-WGaHVAjcrv+Cun7zPlI41SerRtfknGQap281+AakSAw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "32fb99ba93fea2798be0e997ea331dd78167f814",
+        "rev": "0196c0175e9191c474c26ab5548db27ef5d34b05",
         "type": "github"
       },
       "original": {

flake.nix

@@ -12,14 +12,14 @@
   outputs = { self, nixpkgs, playdate-sdk }:
     let system = "x86_64-linux";
         pkgs = nixpkgs.legacyPackages.${system};
-        stdenv = pkgs.stdenv;
         playdate-sdk-pkg = playdate-sdk.packages.${system}.default;
     in {
-      devShell.${system} = with stdenv; with pkgs;
+      devShell.${system} = with pkgs;
         mkShell {
           nativeBuildInputs = [
             just
             lua-language-server
+            nushell
             playdate-sdk-pkg
           ];
         };

justfile

@@ -1,9 +1,14 @@
 bin := "Rush.pdx"
+playdate_sdk_version := "2.6.2"
+export PLAYDATE_SDK_PATH := x"~/.local/bin/PlaydateSDK-" + playdate_sdk_version
 
 alias b := build
 build:
-    pdc src {{ bin }}
+    $PLAYDATE_SDK_PATH/bin/pdc src {{ bin }}
 
 alias s := simu
 simu: build
     PlaydateSimulator {{ bin }}
+
+setup:
+    tools/download-sdk.nu {{ playdate_sdk_version }}

src/main.lua

@@ -24,34 +24,32 @@ local playerSprite = nil
 -- A function to set up our game environment.
 
 function myGameSetUp()
+  -- Set up the player sprite.
 
-    -- Set up the player sprite.
+  local playerImage = gfx.image.new("img/player.png")
+  assert(playerImage) -- make sure the image was where we thought
 
-    local playerImage = gfx.image.new("Images/playerImage")
-    assert( playerImage ) -- make sure the image was where we thought
+  playerSprite = gfx.sprite.new(playerImage)
+  playerSprite:moveTo(200, 120) -- this is where the center of the sprite is placed; (200,120) is the center of the Playdate screen
+  playerSprite:add()            -- This is critical!
 
-    playerSprite = gfx.sprite.new( playerImage )
-    playerSprite:moveTo( 200, 120 ) -- this is where the center of the sprite is placed; (200,120) is the center of the Playdate screen
-    playerSprite:add() -- This is critical!
+  -- We want an environment displayed behind our sprite.
+  -- There are generally two ways to do this:
+  -- 1) Use setBackgroundDrawingCallback() to draw a background image. (This is what we're doing below.)
+  -- 2) Use a tilemap, assign it to a sprite with sprite:setTilemap(tilemap),
+  --       and call :setZIndex() with some low number so the background stays behind
+  --       your other sprites.
 
-    -- We want an environment displayed behind our sprite.
-    -- There are generally two ways to do this:
-    -- 1) Use setBackgroundDrawingCallback() to draw a background image. (This is what we're doing below.)
-    -- 2) Use a tilemap, assign it to a sprite with sprite:setTilemap(tilemap),
-    --       and call :setZIndex() with some low number so the background stays behind
-    --       your other sprites.
-
-    local backgroundImage = gfx.image.new( "Images/background" )
-    assert( backgroundImage )
-
-    gfx.sprite.setBackgroundDrawingCallback(
-        function( x, y, width, height )
-            -- x,y,width,height is the updated area in sprite-local coordinates
-            -- The clip rect is already set to this area, so we don't need to set it ourselves
-            backgroundImage:draw( 0, 0 )
-        end
-    )
+  -- local backgroundImage = gfx.image.new("Images/background")
+  -- assert(backgroundImage)
 
+  -- gfx.sprite.setBackgroundDrawingCallback(
+  --   function(x, y, width, height)
+  --     -- x,y,width,height is the updated area in sprite-local coordinates
+  --     -- The clip rect is already set to this area, so we don't need to set it ourselves
+  --     backgroundImage:draw(0, 0)
+  --   end
+  -- )
 end
 
 -- Now we'll call the function above to configure our game.
@@ -65,31 +63,28 @@ myGameSetUp()
 -- Use this function to poll input, run game logic, and move sprites.
 
 function playdate.update()
+  -- Poll the d-pad and move our player accordingly.
+  -- (There are multiple ways to read the d-pad; this is the simplest.)
+  -- Note that it is possible for more than one of these directions
+  -- to be pressed at once, if the user is pressing diagonally.
 
-    -- Poll the d-pad and move our player accordingly.
-    -- (There are multiple ways to read the d-pad; this is the simplest.)
-    -- Note that it is possible for more than one of these directions
-    -- to be pressed at once, if the user is pressing diagonally.
+  if playdate.buttonIsPressed(playdate.kButtonUp) then
+    playerSprite:moveBy(0, -2)
+  end
+  if playdate.buttonIsPressed(playdate.kButtonRight) then
+    playerSprite:moveBy(2, 0)
+  end
+  if playdate.buttonIsPressed(playdate.kButtonDown) then
+    playerSprite:moveBy(0, 2)
+  end
+  if playdate.buttonIsPressed(playdate.kButtonLeft) then
+    playerSprite:moveBy(-2, 0)
+  end
 
-    if playdate.buttonIsPressed( playdate.kButtonUp ) then
-        playerSprite:moveBy( 0, -2 )
-    end
-    if playdate.buttonIsPressed( playdate.kButtonRight ) then
-        playerSprite:moveBy( 2, 0 )
-    end
-    if playdate.buttonIsPressed( playdate.kButtonDown ) then
-        playerSprite:moveBy( 0, 2 )
-    end
-    if playdate.buttonIsPressed( playdate.kButtonLeft ) then
-        playerSprite:moveBy( -2, 0 )
-    end
-
-    -- Call the functions below in playdate.update() to draw sprites and keep
-    -- timers updated. (We aren't using timers in this example, but in most
-    -- average-complexity games, you will.)
-
-    gfx.sprite.update()
-    playdate.timer.updateTimers()
+  -- Call the functions below in playdate.update() to draw sprites and keep
+  -- timers updated. (We aren't using timers in this example, but in most
+  -- average-complexity games, you will.)
 
+  gfx.sprite.update()
+  playdate.timer.updateTimers()
 end
-

tools/download-sdk.nu

@@ -0,0 +1,24 @@
+#!/usr/bin/env nu
+
+def main [version: string] {
+  let sdk_path = $"~/.local/bin/PlaydateSDK-($version)" | path expand
+  if ($sdk_path | path exists) {
+    print $"SDK already installed at ($sdk_path)"
+    return
+  }
+
+  let sdk_url = $"https://download.panic.com/playdate_sdk/Linux/PlaydateSDK-($version).tar.gz"
+  let out_path = mktemp --tmpdir $"PlaydateSDK-($version)-XXX.tar.gz"
+  
+  http get $sdk_url | save --raw --progress --force $out_path
+
+  let parent_dir = $sdk_path | path dirname
+  mkdir $parent_dir
+  let uncompress = tar xf $out_path --directory $parent_dir | complete
+  if $uncompress.exit_code != 0 {
+    print --stderr $uncompress.stderr
+    exit 1
+  }
+
+  run-external sudo $"($sdk_path)/setup.sh"
+}