working on build

Author: konsumer

.github/workflows/publish.yml

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+name: Publish
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install WASI SDK
+        uses: konsumer/install-wasi-sdk@v1
+        with:
+          version: "25"
+      - name: Configure CMake
+        run: cmake -B build -DCMAKE_TOOLCHAIN_FILE=$WASI_SDK_PATH/share/cmake/wasi-sdk.cmake -DCMAKE_BUILD_TYPE=Release
+      - name: Build CMake
+        run: cmake --build build
+      - name: Copy Cart
+        run: cp *.null0 webroot/
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./webroot
+
+  deploy:
+    needs: build
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

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+.DS_Store
+.vscode
+build
+*.null0

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+project(mygame)
+
+# this pulls the current cart-header from remote
+file(DOWNLOAD
+	"https://raw.githubusercontent.com/notnullgames/null0/refs/heads/main/carts/c/null0.h"
+	"${CMAKE_CURRENT_SOURCE_DIR}/src/null0.h"
+)
+
+# this creates a main.wasm and zips it into a cart in project-root
+function (BUILD_CART_C name cart_dir)
+  set(CART_TEMP "${CMAKE_CURRENT_BINARY_DIR}/${name}_c_temp/")
+  add_executable(${name}_c_wasm "${cart_dir}/main.c")
+  target_include_directories(${name}_c_wasm PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/c")
+  add_custom_target(${name} ALL
+		COMMAND ${CMAKE_COMMAND} -E make_directory "${CART_TEMP}"
+		COMMAND ${CMAKE_COMMAND} -E copy "$<TARGET_FILE:${name}_c_wasm>" "${CART_TEMP}/main.wasm"
+		COMMAND ${CMAKE_COMMAND} -E copy_directory "${cart_dir}" "${CART_TEMP}"
+		COMMAND ${CMAKE_COMMAND} -E rm -f "${CART_TEMP}/*.c"
+		COMMAND ${CMAKE_COMMAND} -E rm -f "${CART_TEMP}/*.h"
+		COMMAND ${CMAKE_COMMAND} -E chdir "${CART_TEMP}" ${CMAKE_COMMAND} -E tar "cf" "${CMAKE_CURRENT_BINARY_DIR}/${name}.null0" --format=zip .
+		COMMAND ${CMAKE_COMMAND} -E rm -rf "${CART_TEMP}"
+		COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_BINARY_DIR}/${name}.null0" "${CMAKE_CURRENT_SOURCE_DIR}"
+		DEPENDS ${name}_c_wasm
+		COMMENT "Creating cart ${name}.null0"
+  )
+endfunction()
+
+# build your cart
+BUILD_CART_C("${PROJECT_NAME}" "${CMAKE_CURRENT_SOURCE_DIR}/src")

README.md

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+This is a basic example cart in C for the [null0](https://notnull.games/null0) game-engine.
+
+## usage
+
+Carts run natively, and on the web. This repo will auto-publish to github-pages on push, so users can check out your cart.
+
+They can also install [the native runtime](https://github.com/notnullgames/null0/releases) and use it to run your cart.
+
+## developing
+
+Make sure you have [wasi-sdk](https://github.com/WebAssembly/wasi-sdk/releases) installed and `WASI_SDK_PATH` set to it's location (eg `/opt/wasi-sdk`.)
+
+Then you can do this:
+
+```sh
+$WASI_SDK_PATH/bin/clang src/main.c -o src/main.wasm
+cd src
+zip -r ../cart.null0 -x '*.h' '*.c' .
+```
+
+You can also use cmake (recommended) to build a complete cart:
+
+```sh
+cmake -B build -DCMAKE_TOOLCHAIN_FILE=$WASI_SDK_PATH/share/cmake/wasi-sdk.cmake -DCMAKE_BUILD_TYPE=Release
+cmake --build build
+```

src/main.c

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+#include "null0.h"
+
+int main() {
+  // no update needed, since this does not change
+  u32 bg = image_gradient(SCREEN_WIDTH, SCREEN_HEIGHT, BLUE, GREEN, RED, YELLOW);
+  draw_image(bg, 0, 0);
+  draw_text(FONT_DEFAULT, "Welcome to null0!!!", 230, 230, BLACK);
+  draw_text(FONT_DEFAULT, "Welcome to null0!!!", 231, 231, RAYWHITE);
+}