Add Flutter channel shader bundle smoke shards

.github/workflows/flutter.yml

@@ -38,3 +38,33 @@ jobs:
         run: flutter pub get
       - name: Run tests
         run: flutter test
+
+  shader-bundle-smoke-master:
+    name: Shader bundle smoke (master)
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: master
+      - run: flutter --version
+      - name: Verify Flutter master shader bundle hook behavior
+        run: tool/verify_shader_bundle_hook.sh
+        env:
+          VERIFY_BUILD_HOOK_CACHE: true
+          VERIFY_DIRECT_SHADER: true
+          VERIFY_TRANSITIVE_INCLUDE: true
+
+  shader-bundle-smoke-stable:
+    name: Shader bundle smoke (stable)
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+      - run: flutter --version
+      - name: Verify Flutter stable shader bundle build compatibility
+        run: tool/verify_shader_bundle_hook.sh

test_fixtures/shader_bundle_app/hook/build.dart

@@ -0,0 +1,13 @@
+import 'package:flutter_gpu_shaders/build.dart';
+import 'package:hooks/hooks.dart';
+
+void main(List<String> args) async {
+  await build(args, (input, output) async {
+    await buildShaderBundleJson(
+      buildInput: input,
+      buildOutput: output,
+      manifestFileName: 'test_bundle.shaderbundle.json',
+      includeDirectories: [input.packageRoot.resolve('shaders/')],
+    );
+  });
+}

test_fixtures/shader_bundle_app/lib/main.dart

@@ -0,0 +1,5 @@
+import 'package:flutter/widgets.dart';
+
+void main() {
+  runApp(const SizedBox.shrink());
+}

test_fixtures/shader_bundle_app/pubspec.yaml

@@ -0,0 +1,16 @@
+name: shader_bundle_app
+description: Fixture app for exercising flutter_gpu_shaders build hooks.
+publish_to: none
+
+environment:
+  sdk: ^3.10.0
+
+dependencies:
+  flutter:
+    sdk: flutter
+  flutter_gpu_shaders:
+    path: ../..
+  hooks: ^2.0.0
+
+flutter:
+  uses-material-design: true

test_fixtures/shader_bundle_app/shaders/shared_color.glsl

@@ -0,0 +1,3 @@
+vec4 sharedColor() {
+  return vec4(0.1, 0.2, 0.3, 1.0);
+}

test_fixtures/shader_bundle_app/shaders/smoke.frag

@@ -0,0 +1,9 @@
+#version 460 core
+
+#include <shared_color.glsl>
+
+out vec4 frag_color;
+
+void main() {
+  frag_color = sharedColor();
+}

test_fixtures/shader_bundle_app/shaders/smoke.vert

@@ -0,0 +1,7 @@
+#version 460 core
+
+in vec2 position;
+
+void main() {
+  gl_Position = vec4(position, 0.0, 1.0);
+}

test_fixtures/shader_bundle_app/test_bundle.shaderbundle.json

@@ -0,0 +1,10 @@
+{
+  "SmokeVertex": {
+    "type": "vertex",
+    "file": "shaders/smoke.vert"
+  },
+  "SmokeFragment": {
+    "type": "fragment",
+    "file": "shaders/smoke.frag"
+  }
+}

tool/verify_shader_bundle_hook.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+fixture_source="$repo_root/test_fixtures/shader_bundle_app"
+verify_build_hook_cache="${VERIFY_BUILD_HOOK_CACHE:-false}"
+verify_direct_shader="${VERIFY_DIRECT_SHADER:-false}"
+verify_transitive_include="${VERIFY_TRANSITIVE_INCLUDE:-false}"
+workdir="$(mktemp -d)"
+trap 'rm -rf "$workdir"' EXIT
+
+fixture="$workdir/shader_bundle_app"
+cp -R "$fixture_source" "$fixture"
+
+cat > "$fixture/pubspec_overrides.yaml" <<YAML
+dependency_overrides:
+  flutter_gpu_shaders:
+    path: "$repo_root"
+YAML
+
+cd "$fixture"
+
+flutter --version
+flutter pub get
+
+flutter build bundle
+bundle="build/shaderbundles/test_bundle.shaderbundle"
+if [[ ! -s "$bundle" ]]; then
+  echo "Expected shader bundle at $bundle" >&2
+  exit 1
+fi
+
+if [[ "$verify_build_hook_cache" != "true" ]]; then
+  exit 0
+fi
+
+second_build_log="$workdir/second_build.log"
+flutter build bundle -v > "$second_build_log" 2>&1
+if ! grep -q "Skipping target: build_hooks" "$second_build_log"; then
+  echo "Expected unchanged build to skip build_hooks." >&2
+  cat "$second_build_log" >&2
+  exit 1
+fi
+
+if [[ "$verify_direct_shader" != "true" ]]; then
+  exit 0
+fi
+
+cat > shaders/smoke.frag <<'GLSL'
+#version 460 core
+
+#include <shared_color.glsl>
+
+out vec4 frag_color;
+
+void main() {
+  frag_color = vec4(0.4, 0.5, 0.6, 1.0);
+}
+GLSL
+
+third_build_log="$workdir/third_build.log"
+flutter build bundle -v > "$third_build_log" 2>&1
+if ! grep -q "build_hooks: Starting due to" "$third_build_log"; then
+  echo "Expected editing a directly declared shader to rerun build_hooks." >&2
+  cat "$third_build_log" >&2
+  exit 1
+fi
+
+if [[ ! -s "$bundle" ]]; then
+  echo "Expected shader bundle at $bundle after direct shader rebuild" >&2
+  exit 1
+fi
+
+if [[ "$verify_transitive_include" != "true" ]]; then
+  exit 0
+fi
+
+cat > shaders/shared_color.glsl <<'GLSL'
+vec4 sharedColor() {
+  return vec4(0.9, 0.8, 0.7, 1.0);
+}
+GLSL
+
+fourth_build_log="$workdir/fourth_build.log"
+flutter build bundle -v > "$fourth_build_log" 2>&1
+if ! grep -q "build_hooks: Starting due to" "$fourth_build_log"; then
+  echo "Expected editing a transitive #include to rerun build_hooks." >&2
+  cat "$fourth_build_log" >&2
+  exit 1
+fi
+
+if [[ ! -s "$bundle" ]]; then
+  echo "Expected shader bundle at $bundle after transitive include rebuild" >&2
+  exit 1
+fi