Auto-update server-only Macs and replace Sparkle's update UI

cmd/byre/serve.go

@@ -8,8 +8,10 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"os/exec"
 	"os/signal"
 	"path/filepath"
+	"strings"
 	"syscall"
 	"time"
 
@@ -42,6 +44,7 @@ func serveCmd(args []string) {
 	ctx, replaced := context.WithCancel(ctx)
 	defer replaced()
 	go watchExecutable(ctx, replaced)
+	go updateDaily(ctx)
 
 	hs := &http.Server{
 		Addr:        *listenAddr,
@@ -92,3 +95,30 @@ func watchExecutable(ctx context.Context, replaced context.CancelFunc) {
 		return
 	}
 }
+
+func updateDaily(ctx context.Context) {
+	for {
+		update(ctx)
+		select {
+		case <-ctx.Done():
+			return
+		case <-time.After(24 * time.Hour):
+		}
+	}
+}
+
+func update(ctx context.Context) {
+	bin, err := exec.LookPath("byre-update")
+	if err != nil {
+		slog.Error("find byre-update", "err", err)
+		return
+	}
+	ctx, cancel := context.WithTimeout(ctx, 30*time.Minute)
+	defer cancel()
+	out, err := exec.CommandContext(ctx, bin).CombinedOutput()
+	if err != nil {
+		slog.Error("byre-update", "err", err, "output", strings.TrimSpace(string(out)))
+		return
+	}
+	slog.Info("byre-update", "output", strings.TrimSpace(string(out)))
+}