ci: zig fmt check

This adds a CI test to ensure that all Zig files are properly formatted.
This avoids unrelated diff noise in future PRs.

.github/workflows/test.yml

@@ -8,7 +8,7 @@ name: Test
 jobs:
   required:
     name: "Required Checks: Test"
-    runs-on: namespace-profile-ghostty-sm
+    runs-on: namespace-profile-ghostty-xsm
     needs:
       - build-bench
       - build-dist
@@ -31,6 +31,7 @@ jobs:
       - translations
       - test-pkg-linux
       - test-debian-12
+      - zig-fmt
     steps:
       - id: status
         name: Determine status
@@ -612,9 +613,36 @@ jobs:
       - name: test
         run: nix develop -c zig build test --system ${{ steps.deps.outputs.deps }}
 
+  zig-fmt:
+    if: github.repository == 'ghostty-org/ghostty'
+    runs-on: namespace-profile-ghostty-xsm
+    timeout-minutes: 60
+    env:
+      ZIG_LOCAL_CACHE_DIR: /zig/local-cache
+      ZIG_GLOBAL_CACHE_DIR: /zig/global-cache
+    steps:
+      - uses: actions/checkout@v4 # Check out repo so we can lint it
+      - name: Setup Cache
+        uses: namespacelabs/nscloud-cache-action@v1.2.0
+        with:
+          path: |
+            /nix
+            /zig
+      - uses: cachix/install-nix-action@v30
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v15
+        with:
+          name: ghostty
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+          skipPush: true
+          useDaemon: false # sometimes fails on short jobs
+      - name: zig fmt
+        run: nix develop -c zig fmt --check .
+
   prettier:
     if: github.repository == 'ghostty-org/ghostty'
-    runs-on: namespace-profile-ghostty-sm
+    runs-on: namespace-profile-ghostty-xsm
     timeout-minutes: 60
     env:
       ZIG_LOCAL_CACHE_DIR: /zig/local-cache
@@ -641,7 +669,7 @@ jobs:
 
   alejandra:
     if: github.repository == 'ghostty-org/ghostty'
-    runs-on: namespace-profile-ghostty-sm
+    runs-on: namespace-profile-ghostty-xsm
     timeout-minutes: 60
     env:
       ZIG_LOCAL_CACHE_DIR: /zig/local-cache
@@ -668,7 +696,7 @@ jobs:
 
   typos:
     if: github.repository == 'ghostty-org/ghostty'
-    runs-on: namespace-profile-ghostty-sm
+    runs-on: namespace-profile-ghostty-xsm
     timeout-minutes: 60
     env:
       ZIG_LOCAL_CACHE_DIR: /zig/local-cache

pkg/opengl/Texture.zig

@@ -173,15 +173,6 @@ pub const Binding = struct {
         width: c.GLsizei,
         height: c.GLsizei,
     ) !void {
-        glad.context.CopyTexSubImage2D.?(
-            @intFromEnum(b.target),
-            level,
-            xoffset,
-            yoffset,
-            x,
-            y,
-            width,
-            height
-        );
+        glad.context.CopyTexSubImage2D.?(@intFromEnum(b.target), level, xoffset, yoffset, x, y, width, height);
     }
 };