Add actual shader compile to smoke tests

Author: tombh

.gitignore

@@ -17,3 +17,6 @@ test_output
 cmy_triangle_renderer.svg
 .aider*
 flamegraph.svg
+
+# Compiled shader assets from running tests
+crates/shader-crate-template/shaders

crates/cargo-gpu/src/main.rs

@@ -207,11 +207,17 @@ mod test {
             &format!("{}", output_dir.display()),
         ];
         if let Cli {
-            command: Command::Build(build),
+            command: Command::Build(mut build),
         } = Cli::parse_from(args)
         {
             assert_eq!(shader_crate, build.shader_crate);
             assert_eq!(output_dir, build.output_dir);
+
+            // TODO:
+            // What's the best way to reset caches for this? For example we could add a
+            // `--force-spirv-cli-rebuild`, but that would slow down each test. But without
+            // something like that we might not be getting actual idempotent tests.
+            build.run();
         } else {
             panic!("was not a build command");
         }

crates/shader-crate-template/src/lib.rs

@@ -1,7 +1,6 @@
 //! Shader entry points.
 //!
-//! Contains an example vertex shader, fragment shader and one example compute
-//! shader.
+//! Contains an example vertex shader, fragment shader.
 #![no_std]
 use glam::{Vec2, Vec4};
 use spirv_std::spirv;