Put commands in their own files and some stricter lints

.github/workflows/push.yaml

@@ -1,8 +1,8 @@
 name: push
 
-on: 
+on:
   push:
-    branches: 
+    branches:
       - main
   pull_request:
 
@@ -13,18 +13,18 @@ env:
 jobs:
   install-and-build-shaders:
     strategy:
-      matrix: 
+      matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     defaults:
-      run: 
+      run:
         shell: bash
-    env: 
+    env:
       RUST_LOG: debug
     steps:
       - uses: actions/checkout@v2
       - uses: moonrepo/setup-rust@v1
-      - run: rustup default stable 
+      - run: rustup default stable
       - run: rustup update
       - run: cargo test
       - run: cargo install --path crates/cargo-gpu

Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 members = [
-    "crates/cargo-gpu", 
+    "crates/cargo-gpu",
     "crates/shader-crate-template"
 ]
 
@@ -21,3 +21,32 @@ relative-path = "1.9.3"
 serde = { version = "1.0.214", features = ["derive"] }
 serde_json = "1.0.132"
 toml = "0.8.19"
+
+[workspace.lints.rust]
+missing_docs = "warn"
+
+[workspace.lints.clippy]
+all = { level = "warn", priority = 0 }
+pedantic = { level = "warn", priority = 0 }
+nursery = { level = "warn", priority = 0 }
+cargo = { level = "warn", priority = 0 }
+restriction = { level = "warn", priority = 0 }
+blanket_clippy_restriction_lints = { level = "allow", priority = 1 }
+
+arithmetic_side_effects = { level = "allow", priority = 1 }
+absolute_paths = { level = "allow", priority = 1 }
+cargo_common_metadata = { level = "allow", priority = 1 }
+implicit_return = { level = "allow", priority = 1 }
+single_call_fn = { level = "allow", priority = 1 }
+question_mark_used = { level = "allow", priority = 1 }
+multiple_crate_versions = { level = "allow", priority = 1 }
+pub_with_shorthand = { level = "allow", priority = 1 }
+partial_pub_fields = { level = "allow", priority = 1 }
+pattern_type_mismatch = { level = "allow", priority = 1 }
+print_stdout = { level = "allow", priority = 1 }
+std_instead_of_alloc = { level = "allow", priority = 1 }
+
+# TODO: Try to not depend on these lints
+unwrap_used = { level = "allow", priority = 1 }
+panic = { level = "allow", priority = 1 }
+

crates/cargo-gpu/Cargo.toml

@@ -3,8 +3,9 @@ name = "cargo-gpu"
 version = "0.1.0"
 edition = "2021"
 description = "Generates shader .spv files from rust-gpu shader crates"
+repository = "https://github.com/Rust-GPU/cargo-gpu"
 readme = "../../README.md"
-
+keywords = ["gpu", "compiler"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
@@ -33,3 +34,6 @@ codegen-units = 256
 opt-level = 3
 incremental = true
 codegen-units = 256
+
+[lints]
+workspace = true

crates/cargo-gpu/src/builder.rs

@@ -0,0 +1,142 @@
+//! `cargo gpu build`, analogous to `cargo build`
+
+use std::io::Write as _;
+
+use clap::Parser;
+use spirv_builder_cli::{Linkage, ShaderModule};
+
+use crate::{install::Install, target_spec_dir};
+
+/// `cargo build` subcommands
+#[derive(Parser, Debug)]
+pub struct Build {
+    /// Install the `rust-gpu` compiler and components
+    #[clap(flatten)]
+    install: Install,
+
+    /// Directory containing the shader crate to compile.
+    #[clap(long, default_value = "./")]
+    pub shader_crate: std::path::PathBuf,
+
+    /// Shader target.
+    #[clap(long, default_value = "spirv-unknown-vulkan1.2")]
+    shader_target: String,
+
+    /// Set cargo default-features.
+    #[clap(long)]
+    no_default_features: bool,
+
+    /// Set cargo features.
+    #[clap(long)]
+    features: Vec<String>,
+
+    /// Path to the output directory for the compiled shaders.
+    #[clap(long, short, default_value = "./")]
+    pub output_dir: std::path::PathBuf,
+}
+
+impl Build {
+    /// Entrypoint
+    pub fn run(&mut self) {
+        let (dylib_path, spirv_builder_cli_path) = self.install.run();
+
+        // Ensure the shader output dir exists
+        log::debug!("ensuring output-dir '{}' exists", self.output_dir.display());
+        std::fs::create_dir_all(&self.output_dir).unwrap();
+        self.output_dir = self.output_dir.canonicalize().unwrap();
+
+        // Ensure the shader crate exists
+        self.shader_crate = self.shader_crate.canonicalize().unwrap();
+        assert!(
+            self.shader_crate.exists(),
+            "shader crate '{}' does not exist. (Current dir is '{}')",
+            self.shader_crate.display(),
+            std::env::current_dir().unwrap().display()
+        );
+
+        let spirv_builder_args = spirv_builder_cli::Args {
+            dylib_path,
+            shader_crate: self.shader_crate.clone(),
+            shader_target: self.shader_target.clone(),
+            path_to_target_spec: target_spec_dir().join(format!("{}.json", self.shader_target)),
+            no_default_features: self.no_default_features,
+            features: self.features.clone(),
+            output_dir: self.output_dir.clone(),
+        };
+
+        // UNWRAP: safe because we know this always serializes
+        let arg = serde_json::to_string_pretty(&spirv_builder_args).unwrap();
+        log::info!("using spirv-builder-cli arg: {arg}");
+
+        // Call spirv-builder-cli to compile the shaders.
+        let output = std::process::Command::new(spirv_builder_cli_path)
+            .arg(arg)
+            .stdout(std::process::Stdio::inherit())
+            .stderr(std::process::Stdio::inherit())
+            .output()
+            .unwrap();
+        assert!(output.status.success(), "build failed");
+
+        let spirv_manifest = self.output_dir.join("spirv-manifest.json");
+        if spirv_manifest.is_file() {
+            log::debug!(
+                "successfully built shaders, raw manifest is at '{}'",
+                spirv_manifest.display()
+            );
+        } else {
+            log::error!("missing raw manifest '{}'", spirv_manifest.display());
+            panic!("missing raw manifest");
+        }
+
+        let shaders: Vec<ShaderModule> =
+            serde_json::from_reader(std::fs::File::open(&spirv_manifest).unwrap()).unwrap();
+
+        let mut linkage: Vec<_> = shaders
+            .into_iter()
+            .map(
+                |ShaderModule {
+                     entry,
+                     path: filepath,
+                 }| {
+                    use relative_path::PathExt as _;
+                    let path = self.output_dir.join(filepath.file_name().unwrap());
+                    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();
+
+        // Write the shader manifest json file
+        let manifest_path = self.output_dir.join("manifest.json");
+        // Sort the contents so the output is deterministic
+        linkage.sort();
+        // UNWRAP: safe because we know this always serializes
+        let json = serde_json::to_string_pretty(&linkage).unwrap();
+        let mut file = std::fs::File::create(&manifest_path).unwrap_or_else(|error| {
+            log::error!(
+                "could not create shader manifest file '{}': {error}",
+                manifest_path.display(),
+            );
+            panic!("{error}")
+        });
+        file.write_all(json.as_bytes()).unwrap_or_else(|error| {
+            log::error!(
+                "could not write shader manifest file '{}': {error}",
+                manifest_path.display(),
+            );
+            panic!("{error}")
+        });
+
+        log::info!("wrote manifest to '{}'", manifest_path.display());
+
+        if spirv_manifest.is_file() {
+            log::debug!(
+                "removing spirv-manifest.json file '{}'",
+                spirv_manifest.display()
+            );
+            std::fs::remove_file(spirv_manifest).unwrap();
+        }
+    }
+}