feat: 添加 build.rs 自动构建前端，cargo build 时自动执行 npm install + npm run build

Makefile

@@ -28,10 +28,9 @@ dev-frontend:
 	@echo "Starting frontend dev server..."
 	cd web && npm run dev
 
-# Build for production
+# Build for production (frontend is built automatically by cargo via build.rs)
 build:
 	@echo "Building PicoBot Web UI..."
-	cd web && npm run build
 	cargo build --release
 	@echo "Build complete!"
 

build.rs

@@ -0,0 +1,63 @@
+use std::path::Path;
+use std::process::Command;
+
+fn run_npm(args: &[&str], web_dir: &Path) {
+    let is_windows = cfg!(target_os = "windows");
+
+    if is_windows {
+        let mut cmd_args = vec!["/c", "npm"];
+        cmd_args.extend_from_slice(args);
+        let status = Command::new("cmd")
+            .args(&cmd_args)
+            .current_dir(web_dir)
+            .status()
+            .unwrap_or_else(|e| panic!("failed to spawn npm {}: {}", args.join(" "), e));
+
+        if !status.success() {
+            panic!("npm {} failed with status {}", args.join(" "), status);
+        }
+    } else {
+        let status = Command::new("npm")
+            .args(args)
+            .current_dir(web_dir)
+            .status()
+            .unwrap_or_else(|e| panic!("failed to spawn npm {}: {}", args.join(" "), e));
+
+        if !status.success() {
+            panic!("npm {} failed with status {}", args.join(" "), status);
+        }
+    }
+}
+
+fn main() {
+    println!("cargo:rerun-if-env-changed=SKIP_FRONTEND_BUILD");
+
+    let web_dir = Path::new("web");
+    if web_dir.exists() {
+        println!("cargo:rerun-if-changed=web/src");
+        println!("cargo:rerun-if-changed=web/index.html");
+        println!("cargo:rerun-if-changed=web/package.json");
+        println!("cargo:rerun-if-changed=web/vite.config.ts");
+        println!("cargo:rerun-if-changed=web/tailwind.config.js");
+        println!("cargo:rerun-if-changed=web/postcss.config.js");
+        println!("cargo:rerun-if-changed=web/tsconfig.json");
+    }
+
+    if std::env::var("SKIP_FRONTEND_BUILD").is_ok() {
+        println!("cargo:warning=SKIP_FRONTEND_BUILD is set, skipping frontend build");
+        return;
+    }
+
+    if !web_dir.exists() {
+        println!("cargo:warning=web/ directory not found, skipping frontend build");
+        return;
+    }
+
+    println!("cargo:warning=building frontend (npm install)...");
+    run_npm(&["install"], web_dir);
+
+    println!("cargo:warning=building frontend (npm run build)...");
+    run_npm(&["run", "build"], web_dir);
+
+    println!("cargo:warning=frontend build complete, output in static/");
+}

build.sh

@@ -12,15 +12,7 @@ if [ ! -f "Cargo.toml" ]; then
 fi
 
 echo ""
-echo "Step 1: Building frontend..."
-echo "----------------------------------------"
-cd web
-npm install
-npm run build
-cd ..
-
-echo ""
-echo "Step 2: Building Rust backend..."
+echo "Building PicoBot (frontend is built automatically by cargo via build.rs)..."
 echo "----------------------------------------"
 cargo build --release
 

scripts/build-release.ps1

@@ -14,18 +14,8 @@ $DistDir = "$Root\dist\$PackageName"
 
 Write-Host "=== PicoBot v$Version Build ===" -ForegroundColor Cyan
 
-# Step 1: build frontend
-Write-Host "[1/4] Building web frontend..." -ForegroundColor Yellow
-Push-Location "$Root\web"
-try {
-    npm run build
-    if ($LASTEXITCODE -ne 0) { throw "web build failed" }
-} finally {
-    Pop-Location
-}
-
-# Step 2: build Rust backend
-Write-Host "[2/4] Building Rust release..." -ForegroundColor Yellow
+# Build Rust backend (frontend is built automatically via build.rs)
+Write-Host "[1/3] Building PicoBot (frontend auto-built by cargo)..." -ForegroundColor Yellow
 Push-Location $Root
 try {
     cargo build --release
@@ -34,16 +24,16 @@ try {
     Pop-Location
 }
 
-# Step 3: assemble dist directory
-Write-Host "[3/4] Assembling package..." -ForegroundColor Yellow
+# Assemble dist directory
+Write-Host "[2/3] Assembling package..." -ForegroundColor Yellow
 New-Item -ItemType Directory -Force -Path $DistDir | Out-Null
 
 # exe + package contents
 Copy-Item "$Root\target\release\picobot.exe" $DistDir
 Copy-Item "$Root\package\*" $DistDir
 
-# Step 4: zip
-Write-Host "[4/4] Creating zip..." -ForegroundColor Yellow
+# Create zip
+Write-Host "[3/3] Creating zip..." -ForegroundColor Yellow
 $ZipPath = "$Root\dist\$PackageName.zip"
 if (Test-Path $ZipPath) { Remove-Item $ZipPath }
 Compress-Archive -Path $DistDir -DestinationPath $ZipPath