From 00409d834bb887078ee7305ba3d3770250fd8bd4 Mon Sep 17 00:00:00 2001
From: binwiederhier <phil@heckel.io>
Date: Thu, 7 Aug 2025 18:31:42 +0200
Subject: [PATCH] Add build flag for webpush

---
 cmd/serve.go                   | 2 ++
 server/server_webpush.go       | 4 ++++
 server/server_webpush_dummy.go | 6 ++++++
 server/server_webpush_test.go  | 2 ++
 4 files changed, 14 insertions(+)

diff --git a/cmd/serve.go b/cmd/serve.go
index ce8123e3..87a9a6c9 100644
--- a/cmd/serve.go
+++ b/cmd/serve.go
@@ -333,6 +333,8 @@ func execServe(c *cli.Context) error {
 		if messageSizeLimit > 5*1024*1024 {
 			return errors.New("message-size-limit cannot be higher than 5M")
 		}
+	} else if !server.WebPushAvailable && (webPushPrivateKey != "" || webPushPublicKey != "" || webPushFile != "") {
+		return errors.New("cannot enable WebPush, support is not available in this build (nowebpush)")
 	} else if webPushExpiryWarningDuration > 0 && webPushExpiryWarningDuration > webPushExpiryDuration {
 		return errors.New("web push expiry warning duration cannot be higher than web push expiry duration")
 	} else if behindProxy && proxyForwardedHeader == "" {
diff --git a/server/server_webpush.go b/server/server_webpush.go
index 48201489..526e06f2 100644
--- a/server/server_webpush.go
+++ b/server/server_webpush.go
@@ -15,6 +15,10 @@ import (
 )
 
 const (
+	// WebPushAvailable is a constant used to indicate that WebPush support is available.
+	// It can be disabled with the 'nowebpush' build tag.
+	WebPushAvailable = true
+
 	webPushTopicSubscribeLimit = 50
 )
 
diff --git a/server/server_webpush_dummy.go b/server/server_webpush_dummy.go
index b0b669d6..425b22a6 100644
--- a/server/server_webpush_dummy.go
+++ b/server/server_webpush_dummy.go
@@ -6,6 +6,12 @@ import (
 	"net/http"
 )
 
+const (
+	// WebPushAvailable is a constant used to indicate that WebPush support is available.
+	// It can be disabled with the 'nowebpush' build tag.
+	WebPushAvailable = false
+)
+
 func (s *Server) handleWebPushUpdate(w http.ResponseWriter, r *http.Request, v *visitor) error {
 	return errHTTPNotFound
 }
diff --git a/server/server_webpush_test.go b/server/server_webpush_test.go
index f7379511..6aa6c60a 100644
--- a/server/server_webpush_test.go
+++ b/server/server_webpush_test.go
@@ -1,3 +1,5 @@
+//go:build !nowebpush
+
 package server
 
 import (