buildstream.proto: Add capabilities service

Part of #915

1 files changed, 23 insertions, 0 deletions

diff --git a/src/buildstream/_protos/buildstream/v2/buildstream.proto b/src/buildstream/_protos/buildstream/v2/buildstream.proto
index f283d6f3f..e9cd1223b 100644
--- a/src/buildstream/_protos/buildstream/v2/buildstream.proto
+++ b/src/buildstream/_protos/buildstream/v2/buildstream.proto
@@ -44,6 +44,15 @@ service ReferenceStorage {
   }
 }
 
+service Capabilities {
+  // GetCapabilities mirrors
+  rpc GetCapabilities(GetCapabilitiesRequest) returns (ServerCapabilities) {
+    option (google.api.http) = {
+      get: "/v2/{instance_name=**}/capabilities"
+    };
+  }
+}
+
 message GetReferenceRequest {
   // The instance of the execution system to operate against. A server may
   // support multiple instances of the execution system (with their own workers,
@@ -93,3 +102,17 @@ message StatusResponse {
   // Whether reference updates are allowed for the connected client.
   bool allow_updates = 1;
 }
+
+message GetCapabilitiesRequest {
+  string instance_name = 1;
+}
+
+// Capabilities of the artifact service
+message ArtifactCapabilities {
+  bool allow_updates = 1;
+}
+
+// All capabalities will be unset if the service isn't present
+message ServerCapabilities {
+  ArtifactCapabilities artifact_capabilities = 1;
+}
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