Add M0 server skeleton with SQLite store, SSE events, worktrees, and tailscale service

cmd/byre/serve.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"io/fs"
+	"log/slog"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"g.fc.run/misc/byre/internal/server"
+	"g.fc.run/misc/byre/web"
+)
+
+const listenAddr = "127.0.0.1:8270"
+
+func serveCmd(args []string) {
+	flags := flag.NewFlagSet("serve", flag.ExitOnError)
+	dev := flags.Bool("dev", false, "serve the SPA from ./web on disk instead of the embedded copy")
+	flags.Parse(args)
+
+	configDir, err := os.UserConfigDir()
+	if err != nil {
+		fatal("user config dir", "err", err)
+	}
+
+	spa := fs.FS(web.FS)
+	if *dev {
+		spa = os.DirFS("web")
+	}
+
+	srv, err := server.New(filepath.Join(configDir, "byre"), spa)
+	if err != nil {
+		fatal("start server", "err", err)
+	}
+	defer srv.Close()
+
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	hs := &http.Server{
+		Addr:        listenAddr,
+		Handler:     srv.Handler(),
+		BaseContext: func(net.Listener) context.Context { return ctx },
+	}
+
+	go func() {
+		<-ctx.Done()
+		shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		hs.Shutdown(shutdownCtx)
+	}()
+
+	slog.Info("listening", "addr", listenAddr, "dev", *dev)
+	err = hs.ListenAndServe()
+	if !errors.Is(err, http.ErrServerClosed) {
+		fatal("serve", "err", err)
+	}
+}