Create CI build script

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: Build
+run-name: Build
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+on:
+  - push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Install deps
+        uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: libx11-dev libgl-dev libxcursor-dev libxi-dev
+          version: "@latest"
+      - name: Download cosmopolitan
+        uses: bjia56/setup-cosmocc@main
+        with:
+          version: "3.9.6"
+      - name: Build
+        run: ./build
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ github.head_ref || github.ref_name }}
+          path: bin/*

build

@@ -45,7 +45,14 @@ compile shims/linux/x11.c ${LINUX_FLAGS}
 
 compile main.c ${FLAGS}
 
-cat .build/commands | parallel --bar --max-procs $(nproc)
+if [ -t 1 ]
+then
+	PARALLEL_FLAGS="--bar"
+else
+	PARALLEL_FLAGS="--progress"
+fi
+
+cat .build/commands | parallel $PARALLEL_FLAGS --max-procs $(nproc)
 
 objects=$(find .build -name '*.o' -not -path '*.aarch64/*')
 cosmoc++ ${FLAGS} -o bin/cosmo-sokol $objects