From 8f27b7fde12978a7e5b3833a2d989a9b0456d857 Mon Sep 17 00:00:00 2001
From: Patrick Cloke <clokep@users.noreply.github.com>
Date: Mon, 19 Oct 2020 13:03:55 -0400
Subject: [PATCH] Expose the experimental appservice login flow to clients.
 (#8504)

---
 changelog.d/8504.bugfix         | 1 +
 synapse/rest/client/v1/login.py | 2 ++
 2 files changed, 3 insertions(+)
 create mode 100644 changelog.d/8504.bugfix

diff --git a/changelog.d/8504.bugfix b/changelog.d/8504.bugfix
new file mode 100644
index 000000000..2bd0dbb8b
--- /dev/null
+++ b/changelog.d/8504.bugfix
@@ -0,0 +1 @@
+Expose the `uk.half-shot.msc2778.login.application_service` to clients from the login API. This feature was added in v1.21.0, but was not exposed as a potential login flow.
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index d7deb9300..b82a4e978 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -110,6 +110,8 @@ class LoginRestServlet(RestServlet):
             ({"type": t} for t in self.auth_handler.get_supported_login_types())
         )
 
+        flows.append({"type": LoginRestServlet.APPSERVICE_TYPE})
+
         return 200, {"flows": flows}
 
     def on_OPTIONS(self, request: SynapseRequest):