Restructure GPU compilation execution pipeline (#903)

* Restructure gpu compilation execution pipeline

* Add compilation server/client infrastructure

* Add wgpu executor

node-graph/gpu-compiler/gpu-compiler-bin-wrapper/src/lib.rs

@@ -0,0 +1,53 @@
+use serde::{Deserialize, Serialize};
+use std::io::Write;
+
+pub fn compile_spirv(network: &graph_craft::document::NodeNetwork, input_type: &str, output_type: &str, compile_dir: Option<&str>, manifest_path: &str) -> anyhow::Result<Vec<u8>> {
+	let serialized_graph = serde_json::to_string(&network)?;
+	let features = "";
+	#[cfg(feature = "profiling")]
+	let features = "profiling";
+
+	println!("calling cargo run!");
+	let non_cargo_env_vars = std::env::vars().filter(|(k, _)| k.starts_with("PATH")).collect::<Vec<_>>();
+	let mut cargo_command = std::process::Command::new("/usr/bin/cargo")
+		.arg("run")
+		.arg("--release")
+		.arg("--manifest-path")
+		.arg(manifest_path)
+        .current_dir(manifest_path.replace("Cargo.toml", ""))
+        .env_clear()
+        .envs(non_cargo_env_vars)
+		.arg("--features")
+		.arg(features)
+        .arg("--")
+        .arg(input_type)
+        .arg(output_type)
+        // TODO: handle None case properly
+        .arg(compile_dir.unwrap())
+		.stdin(std::process::Stdio::piped())
+		.stdout(std::process::Stdio::piped())
+        .spawn()?;
+
+	cargo_command.stdin.as_mut().unwrap().write_all(serialized_graph.as_bytes())?;
+	let output = cargo_command.wait_with_output()?;
+	if !output.status.success() {
+		return Err(anyhow::anyhow!("cargo failed: {}", String::from_utf8_lossy(&output.stderr)));
+	}
+	Ok(output.stdout)
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+pub struct CompileRequest {
+	network: graph_craft::document::NodeNetwork,
+	input_type: String,
+	output_type: String,
+}
+
+impl CompileRequest {
+	pub fn new(network: graph_craft::document::NodeNetwork, input_type: String, output_type: String) -> Self {
+		Self { network, input_type, output_type }
+	}
+	pub fn compile(&self, compile_dir: &str, manifest_path: &str) -> anyhow::Result<Vec<u8>> {
+		compile_spirv(&self.network, &self.input_type, &self.output_type, Some(compile_dir), manifest_path)
+	}
+}