Use the auto-updating Blacktip, Bamboo and Reef; add the -auto-update option

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

cmd/hammerhead/main.go

@@ -2,6 +2,7 @@
 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
@@ -13,6 +14,7 @@ import (
 	"git.veillax.com/Veillax/hammerhead"
 	"git.veillax.com/Veillax/hammerhead/internal/secretbox"
 	"git.veillax.com/Veillax/reef/dotenv"
+	"git.veillax.com/Veillax/reef/selfupdate"
 )
 
 // version is set at build time (deploy/build.sh).
@@ -39,6 +41,7 @@ func main() {
 	url := flag.String("url", env("HAMMERHEAD_URL", ""), "public URL people reach hammerhead at (used for login redirects and SSO); can also be set in Settings")
 	flag.String("env", ".env", "file to read secrets and settings from")
 	genkey := flag.Bool("genkey", false, "print a new random HAMMERHEAD_MASTER_KEY and exit")
+	autoUpdate := flag.Bool("auto-update", os.Getenv("HAMMERHEAD_AUTO_UPDATE") == "1", "check for new releases every few hours and update and restart by itself (Linux and macOS)")
 	showVersion := flag.Bool("version", false, "print the version and exit")
 	flag.Parse()
 	if *showVersion {
@@ -63,6 +66,9 @@ func main() {
 		log.Fatal(err)
 	}
 	defer srv.Close()
+	if *autoUpdate {
+		go selfupdate.Run(context.Background(), selfupdate.Config{Server: "https://git.veillax.com", Repo: "Veillax/hammerhead", App: "hammerhead", Current: version, Logf: log.Printf, Restart: func(exe string) error { srv.Close(); return selfupdate.Restart(exe) }})
+	}
 	log.Printf("hammerhead %s listening on %s (open it in a browser to finish setup)", version, *listen)
 	hs := &http.Server{Addr: *listen, Handler: srv.Handler(), ReadHeaderTimeout: 10 * time.Second}
 	log.Fatal(hs.ListenAndServe())