feat: establish Orbit models, migrations and development baseline

cmd/orbit/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"git.yuntuo.hk/k2safe/orbit/internal/config"
+	"git.yuntuo.hk/k2safe/orbit/internal/storage/mysql"
+	"git.yuntuo.hk/k2safe/orbit/internal/transport/httpserver"
+)
+
+func main() {
+	if err := run(); err != nil {
+		slog.Error("orbit stopped", "error", err)
+		os.Exit(1)
+	}
+}
+func run() error {
+	slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, nil)))
+	cfg, err := config.Load()
+	if err != nil {
+		return err
+	}
+	root, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+	startup, cancel := context.WithTimeout(root, 10*time.Second)
+	db, err := mysql.Open(startup, cfg.MySQLDSN, cfg.MaxOpen, cfg.MaxIdle)
+	cancel()
+	if err != nil {
+		return err
+	}
+	defer db.Close()
+	server := httpserver.New(cfg.HTTPAddr, func(ctx context.Context) error {
+		if err := db.PingContext(ctx); err != nil {
+			return err
+		}
+		return mysql.CheckSchema(ctx, db)
+	})
+	listener, err := net.Listen("tcp", cfg.HTTPAddr)
+	if err != nil {
+		return err
+	}
+	done := make(chan error, 1)
+	go func() { done <- server.Serve(listener) }()
+	slog.Info("Orbit bootstrap HTTP server starting", "address", listener.Addr().String(), "scope", "health endpoints only")
+	select {
+	case err := <-done:
+		if errors.Is(err, http.ErrServerClosed) {
+			return nil
+		}
+		return err
+	case <-root.Done():
+		shutdown, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+		if err := server.Shutdown(shutdown); err != nil {
+			_ = server.Close()
+			return err
+		}
+		err := <-done
+		if errors.Is(err, http.ErrServerClosed) {
+			return nil
+		}
+		return err
+	}
+}