feat: 实现 version/serve 骨架、迁移占位与健康检查

cmd/nixmsg/serve.go

@@ -0,0 +1,97 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"git.asio.asia/nixevol/NixMsg/internal/config"
+	"git.asio.asia/nixevol/NixMsg/internal/store"
+	"git.asio.asia/nixevol/NixMsg/web"
+)
+
+func cmdServe(_ []string) error {
+	cfgPath := config.PathFromEnv()
+	cfg, err := config.Load(cfgPath)
+	if err != nil {
+		return err
+	}
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+	return runServe(ctx, cfg)
+}
+
+func runServe(ctx context.Context, cfg config.Config) error {
+	wire()
+
+	if err := os.MkdirAll(cfg.DataDir, 0o755); err != nil {
+		return fmt.Errorf("mkdir data_dir: %w", err)
+	}
+
+	db, err := store.OpenWriter(cfg.DataDir, cfg.SQLiteSynchronous)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = db.Close() }()
+
+	if migErr := store.Migrate(db); migErr != nil {
+		return migErr
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("ok"))
+	})
+	// 确保前端资源被链接进二进制；完整静态托管由后续任务完善。
+	_ = web.Dist()
+
+	ln, err := net.Listen("tcp", cfg.Listen)
+	if err != nil {
+		return fmt.Errorf("listen %s: %w", cfg.Listen, err)
+	}
+
+	if err := writeListenAddr(cfg.DataDir, ln.Addr().String()); err != nil {
+		_ = ln.Close()
+		return err
+	}
+
+	srv := &http.Server{
+		Handler:           mux,
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	errCh := make(chan error, 1)
+	go func() {
+		errCh <- srv.Serve(ln)
+	}()
+
+	select {
+	case <-ctx.Done():
+		shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+		_ = srv.Shutdown(shutdownCtx)
+		serveErr := <-errCh
+		if serveErr != nil && !errors.Is(serveErr, http.ErrServerClosed) {
+			return serveErr
+		}
+		return nil
+	case serveErr := <-errCh:
+		if errors.Is(serveErr, http.ErrServerClosed) {
+			return nil
+		}
+		return serveErr
+	}
+}
+
+func writeListenAddr(dataDir, addr string) error {
+	path := filepath.Join(dataDir, "listen.addr")
+	return os.WriteFile(path, []byte(addr+"\n"), 0o644)
+}