Auto-build the fronted into the release binary on cargo build --release

server/build.rs

@@ -1,23 +1,37 @@
-use std::fs;
+use std::env;
 use std::path::Path;
+use std::process::Command;
 
-fn main() {
-    let dist_dir = Path::new("../frontend/dist");
+fn run(cmd: &str, args: &[&str], dir: &Path) {
+    let status = Command::new(cmd)
+        .args(args)
+        .current_dir(dir)
+        .status()
+        .unwrap_or_else(|e| panic!("Failed to run {} {:?}: {}", cmd, args, e));
 
-    println!("cargo:rerun-if-changed=build.rs");
-
-    if let Ok(entries) = fs::read_dir(dist_dir) {
-        for entry in entries.flatten() {
-            let path = entry.path();
-            if path.is_dir() {
-                if let Ok(sub_entries) = fs::read_dir(&path) {
-                    for sub_entry in sub_entries.flatten() {
-                        println!("cargo:rerun-if-changed={}", sub_entry.path().display());
-                    }
-                }
-            } else {
-                println!("cargo:rerun-if-changed={}", path.display());
-            }
-        }
+    if !status.success() {
+        panic!("Command failed: {} {:?}", cmd, args);
     }
 }
+
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-env-changed=PROFILE");
+    println!("cargo:rerun-if-changed=../frontend/package.json");
+    println!("cargo:rerun-if-changed=../frontend/pnpm-lock.yaml");
+    println!("cargo:rerun-if-changed=../frontend/vite.config.ts");
+    println!("cargo:rerun-if-changed=../frontend/index.html");
+    println!("cargo:rerun-if-changed=../frontend/src");
+    println!("cargo:rerun-if-changed=../frontend/public");
+
+    let profile = env::var("PROFILE").unwrap_or_default();
+    if profile != "release" {
+        return;
+    }
+
+    let frontend_dir = Path::new("../frontend");
+
+    // Ensure dependencies are installed and build the frontend bundle.
+    run("pnpm", &["install"], frontend_dir);
+    run("pnpm", &["build"], frontend_dir);
+}