S06-S08: Python spec, Go in-process leaf, tests and Forgejo CI

go/cmd/sm-leaf/main.go

@@ -0,0 +1,26 @@
+// sm-leaf: in-process NATS core plus optional leaf to the Verae hub.
+package main
+
+import (
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/marchon/secure-messaging/internal/leaf"
+)
+
+func main() {
+	hub := flag.String("hub", os.Getenv("SM_LEAF_HUB"), "leaf hub URL, e.g. nats-leaf://10.10.10.21:7422")
+	flag.Parse()
+	n, err := leaf.Start(*hub)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("sm-leaf in-process nats %s hub=%q", n.Addr(), *hub)
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
+	<-ch
+	_ = n.Shutdown()
+}

go/go.mod

@@ -0,0 +1,19 @@
+module github.com/marchon/secure-messaging
+
+go 1.22
+
+require (
+	github.com/nats-io/nats-server/v2 v2.10.24
+	github.com/nats-io/nats.go v1.38.0
+)
+
+require (
+	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/minio/highwayhash v1.0.3 // indirect
+	github.com/nats-io/jwt/v2 v2.7.3 // indirect
+	github.com/nats-io/nkeys v0.4.9 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/time v0.8.0 // indirect
+)

go/go.sum

@@ -0,0 +1,21 @@
+github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
+github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
+github.com/minio/highwayhash v1.0.3 h1:kbnuUMoHYyVl7szWjSxJnxw11k2U709jqFPPmIUyD6Q=
+github.com/minio/highwayhash v1.0.3/go.mod h1:GGYsuwP/fPD6Y9hMiXuapVvlIUEhFhMTh0rxU3ik1LQ=
+github.com/nats-io/jwt/v2 v2.7.3 h1:6bNPK+FXgBeAqdj4cYQ0F8ViHRbi7woQLq4W29nUAzE=
+github.com/nats-io/jwt/v2 v2.7.3/go.mod h1:GvkcbHhKquj3pkioy5put1wvPxs78UlZ7D/pY+BgZk4=
+github.com/nats-io/nats-server/v2 v2.10.24 h1:KcqqQAD0ZZcG4yLxtvSFJY7CYKVYlnlWoAiVZ6i/IY4=
+github.com/nats-io/nats-server/v2 v2.10.24/go.mod h1:olvKt8E5ZlnjyqBGbAXtxvSQKsPodISK5Eo/euIta4s=
+github.com/nats-io/nats.go v1.38.0 h1:A7P+g7Wjp4/NWqDOOP/K6hfhr54DvdDQUznt5JFg9XA=
+github.com/nats-io/nats.go v1.38.0/go.mod h1:IGUM++TwokGnXPs82/wCuiHS02/aKrdYUQkU8If6yjw=
+github.com/nats-io/nkeys v0.4.9 h1:qe9Faq2Gxwi6RZnZMXfmGMZkg3afLLOtrU+gDZJ35b0=
+github.com/nats-io/nkeys v0.4.9/go.mod h1:jcMqs+FLG+W5YO36OX6wFIFcmpdAns+w1Wm6D3I/evE=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/time v0.8.0 h1:9i3RxcPv3PZnitoVGMPDKZSq1xW1gK1Xy3ArNOGZfEg=
+golang.org/x/time v0.8.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=

go/internal/leaf/leaf.go

@@ -0,0 +1,66 @@
+// Package leaf starts an in-process nats-server and optional hub leaf.
+package leaf
+
+import (
+	"errors"
+	"net/url"
+	"time"
+
+	natsserver "github.com/nats-io/nats-server/v2/server"
+	nats "github.com/nats-io/nats.go"
+)
+
+// Node is an in-process broker plus client.
+type Node struct {
+	ns *natsserver.Server
+	nc *nats.Conn
+}
+
+// Start binds 127.0.0.1:0 and optionally leaf-connects to hub.
+func Start(hub string) (*Node, error) {
+	opts := &natsserver.Options{Host: "127.0.0.1", Port: -1}
+	if hub != "" {
+		u, err := url.Parse(hub)
+		if err != nil {
+			return nil, err
+		}
+		opts.LeafNode.Remotes = []*natsserver.RemoteLeafOpts{{URLs: []*url.URL{u}}}
+	}
+	ns, err := natsserver.NewServer(opts)
+	if err != nil {
+		return nil, err
+	}
+	go ns.Start()
+	if !ns.ReadyForConnections(5 * time.Second) {
+		return nil, errors.New("nats not ready")
+	}
+	nc, err := nats.Connect(ns.ClientURL())
+	if err != nil {
+		ns.Shutdown()
+		return nil, err
+	}
+	n := &Node{ns: ns, nc: nc}
+	if _, err := n.nc.Subscribe("verae.sm.send", func(msg *nats.Msg) {
+		if msg.Reply != "" {
+			_ = n.nc.Publish(msg.Reply, []byte(`{"accepted":true}`))
+		}
+	}); err != nil {
+		n.Shutdown()
+		return nil, err
+	}
+	return n, nil
+}
+
+// Addr is the in-process client URL.
+func (n *Node) Addr() string { return n.ns.ClientURL() }
+
+// Shutdown stops client and server.
+func (n *Node) Shutdown() error {
+	if n.nc != nil {
+		n.nc.Close()
+	}
+	if n.ns != nil {
+		n.ns.Shutdown()
+	}
+	return nil
+}

go/internal/leaf/leaf_test.go

@@ -0,0 +1,14 @@
+package leaf
+
+import "testing"
+
+func TestStartInProcess(t *testing.T) {
+	n, err := Start("")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer n.Shutdown()
+	if n.Addr() == "" {
+		t.Fatal("empty addr")
+	}
+}