Initial structure

internal/cli/init.go

@@ -0,0 +1,58 @@
+package cli
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/google/uuid"
+	"github.com/spf13/cobra"
+
+	"github.com/jasper/quptime/internal/config"
+	"github.com/jasper/quptime/internal/crypto"
+)
+
+func addInitCmd(root *cobra.Command) {
+	var advertise string
+	var bindAddr string
+	var bindPort int
+
+	cmd := &cobra.Command{
+		Use:   "init",
+		Short: "Generate node identity, keys, and config",
+		Long: `Initialise a new qu node on this host: pick a UUID, generate an
+RSA keypair, write a default node.yaml, and prepare the trust store.
+
+Idempotent in one direction only: existing key material is never
+overwritten. Re-run only after wiping the data directory.`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := config.EnsureDataDir(); err != nil {
+				return err
+			}
+			if _, err := os.Stat(config.NodeFilePath()); err == nil {
+				return errors.New("node.yaml already exists in data dir — refusing to overwrite")
+			}
+			nodeID := uuid.NewString()
+			n := &config.NodeConfig{
+				NodeID:    nodeID,
+				BindAddr:  bindAddr,
+				BindPort:  bindPort,
+				Advertise: advertise,
+			}
+			if err := n.Save(); err != nil {
+				return fmt.Errorf("save node.yaml: %w", err)
+			}
+			if _, err := crypto.GenerateKeyPair(nodeID); err != nil {
+				return fmt.Errorf("generate keys: %w", err)
+			}
+			fmt.Fprintf(cmd.OutOrStdout(), "initialised node %s\n", nodeID)
+			fmt.Fprintf(cmd.OutOrStdout(), "data dir: %s\n", config.DataDir())
+			fmt.Fprintf(cmd.OutOrStdout(), "advertise: %s\n", n.AdvertiseAddr())
+			return nil
+		},
+	}
+	cmd.Flags().StringVar(&advertise, "advertise", "", "address peers should use to reach this node (host:port)")
+	cmd.Flags().StringVar(&bindAddr, "bind", "0.0.0.0", "listen address for inter-node traffic")
+	cmd.Flags().IntVar(&bindPort, "port", 9001, "listen port for inter-node traffic")
+	root.AddCommand(cmd)
+}