Import source: main

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

main.go

@@ -0,0 +1,66 @@
+// Dash is a single-binary uptime monitoring dashboard.
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"log"
+	"net/http"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"dash/internal/api"
+	"dash/internal/config"
+	"dash/internal/engine"
+	"dash/internal/store"
+)
+
+func main() {
+	configPath := flag.String("config", "targets.yaml", "path to targets.yaml")
+	listen := flag.String("listen", "", "listen address (overrides config)")
+	dbPath := flag.String("db", "", "sqlite database path (overrides config)")
+	flag.Parse()
+
+	cfg, err := config.Load(*configPath)
+	if err != nil {
+		log.Fatalf("config: %v", err)
+	}
+	if *listen != "" {
+		cfg.Settings.Listen = *listen
+	}
+	if *dbPath != "" {
+		cfg.Settings.DB = *dbPath
+	}
+
+	st, err := store.Open(cfg.Settings.DB)
+	if err != nil {
+		log.Fatalf("store: %v", err)
+	}
+	defer st.Close()
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	hub := engine.NewHub()
+	eng := engine.New(cfg, st, hub)
+	go eng.Run(ctx)
+
+	mux := http.NewServeMux()
+	api.New(eng, st, hub).Register(mux)
+	mux.Handle("/", webHandler())
+
+	srv := &http.Server{Addr: cfg.Settings.Listen, Handler: mux}
+	go func() {
+		<-ctx.Done()
+		shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		srv.Shutdown(shutdownCtx)
+	}()
+
+	log.Printf("dash listening on %s — monitoring %d targets", cfg.Settings.Listen, len(cfg.Targets))
+	if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+		log.Fatalf("server: %v", err)
+	}
+}