shader paths in generated manifest.json are relative to the shader crate

Author: schell

Cargo.lock

@@ -15,6 +15,7 @@ directories = "5.0.1"
 env_home = "0.1.0"
 env_logger = "0.10"
 log = "0.4"
+relative-path = "1.9.3"
 serde = { version = "1.0.214", features = ["derive"] }
 serde_json = "1.0.132"
 toml = "0.8.19"

Cargo.toml

@@ -15,6 +15,7 @@ clap.workspace = true
 directories.workspace = true
 env_logger.workspace = true
 log.workspace = true
+relative-path.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 toml.workspace = true

crates/cargo-gpu/Cargo.toml

@@ -472,9 +472,12 @@ impl Build {
                      entry,
                      path: filepath,
                  }| {
+                    use relative_path::PathExt;
                     let path = self.output_dir.join(filepath.file_name().unwrap());
-                    std::fs::copy(filepath, &path).unwrap();
-                    Linkage::new(entry, path)
+                    std::fs::copy(&filepath, &path).unwrap();
+                    let path_relative_to_shader_crate =
+                        path.relative_to(&self.shader_crate).unwrap().to_path("");
+                    Linkage::new(entry, path_relative_to_shader_crate)
                 },
             )
             .collect();