Only load BSP servers that support one of the language we are interested in

Instead of unconditionally loading any BSP server from one of the search locations, only load those that support, C, C++, Obj-C, Obj-C++ or Swift.

Author: ahoppen

Sources/BuildSystemIntegration/ExternalBuildSystemAdapter.swift

@@ -223,7 +223,13 @@ actor ExternalBuildSystemAdapter {
     for case let buildServerConfigLocation? in buildServerConfigLocations {
       let jsonFiles =
         try? FileManager.default.contentsOfDirectory(at: buildServerConfigLocation, includingPropertiesForKeys: nil)
-        .filter { $0.pathExtension == "json" }
+        .filter {
+          guard let config = try? BuildServerConfig.load(from: $0) else {
+            return false
+          }
+          return !Set([Language.c, .cpp, .objective_c, .objective_cpp, .swift].map(\.rawValue))
+            .intersection(config.languages).isEmpty
+        }
 
       if let configFileURL = jsonFiles?.sorted(by: { $0.lastPathComponent < $1.lastPathComponent }).first {
         return configFileURL

Sources/SKTestSupport/BuildServerTestProject.swift

@@ -63,10 +63,10 @@ package class BuildServerTestProject: MultiFileTestProject {
     var files = files
     files[buildServerConfigLocation] = """
       {
-        "name": "client name",
-        "version": "10",
+        "name": "Test BSP-server",
+        "version": "1",
         "bspVersion": "2.0",
-        "languages": ["a", "b"],
+        "languages": ["swift"],
         "argv": ["server.py"]
       }
       """