Remove unused return values (errors)

In this functions the returned errors are always nil. They can be
removed and this makes the code a little bit simpler.

Signed-off-by: Atanas Alexandrov <[email protected]>

Author: cupakob

pkg/cache/client/round_tripper.go

@@ -72,17 +72,8 @@ func (c *ShardRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 	shard := ShardFromContext(req.Context())
 	if !shard.Empty() {
 		req = req.Clone(req.Context())
-		path, err := generatePath(req.URL.Path, shard)
-		if err != nil {
-			return nil, err
-		}
-		req.URL.Path = path
-
-		rawPath, err := generatePath(req.URL.RawPath, shard)
-		if err != nil {
-			return nil, err
-		}
-		req.URL.RawPath = rawPath
+		req.URL.Path = generatePath(req.URL.Path, shard)
+		req.URL.RawPath = generatePath(req.URL.RawPath, shard)
 	}
 	return c.delegate.RoundTrip(req)
 }
@@ -92,24 +83,24 @@ func (c *ShardRoundTripper) WrappedRoundTripper() http.RoundTripper {
 }
 
 // generatePath formats the request path to target the specified shard.
-func generatePath(originalPath string, shard clientshard.Name) (string, error) {
+func generatePath(originalPath string, shard clientshard.Name) string {
 	// if the originalPath already has the shard then the path was already modified and no change needed
 	if strings.HasPrefix(originalPath, shard.Path()) {
-		return originalPath, nil
+		return originalPath
 	}
 	// if the originalPath already has a shard set just overwrite it to the given one
 	if strings.HasPrefix(originalPath, "/shards") {
 		matches := shardNameRegex.FindStringSubmatch(originalPath)
 		if len(matches) >= 2 {
 			// replace /shards/$oldName/reminder with  /shards/$newName/reminder
-			return strings.Replace(originalPath, clientshard.New(matches[1]).Path(), shard.Path(), 1), nil
+			return strings.Replace(originalPath, clientshard.New(matches[1]).Path(), shard.Path(), 1)
 		} else {
 			// the path is either /shards/name/ or /shards/name
 			path := shard.Path()
 			if originalPath[len(originalPath)-1] == '/' {
 				path += "/"
 			}
-			return path, nil
+			return path
 		}
 	}
 
@@ -121,7 +112,7 @@ func generatePath(originalPath string, shard clientshard.Name) (string, error) {
 	}
 	// finally append the original path
 	path += originalPath
-	return path, nil
+	return path
 }
 
 // WithDefaultShardRoundTripper wraps an existing config's with DefaultShardRoundTripper

pkg/cache/client/round_tripper_test.go

@@ -69,10 +69,7 @@ func TestShardRoundTripper(t *testing.T) {
 	}
 	for testName, tt := range tests {
 		t.Run(testName, func(t *testing.T) {
-			result, err := generatePath(tt.originalPath, shard.New("amber"))
-			if err != nil {
-				t.Error(err)
-			}
+			result := generatePath(tt.originalPath, shard.New("amber"))
 			if result != tt.desired {
 				t.Errorf("got %v, want %v", result, tt.desired)
 			}

pkg/server/openapiv3/servicecache.go

@@ -175,10 +175,7 @@ func (c *ServiceCache) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 
 		// add static and dynamic APIs
-		if err := addSpecs(service, c.staticSpecs, orderedCRDs, specs, log); err != nil {
-			responsewriters.InternalError(w, r, err)
-			return
-		}
+		addSpecs(service, c.staticSpecs, orderedCRDs, specs, log)
 
 		// remember for next time
 		c.services.Add(key, m)
@@ -191,7 +188,7 @@ func (c *ServiceCache) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	service.ServeHTTP(w, r)
 }
 
-func addSpecs(service *handler3.OpenAPIService, static map[string]cached.Value[*spec3.OpenAPI], crds []*apiextensionsv1.CustomResourceDefinition, specs []map[string]cached.Value[*spec3.OpenAPI], log logr.Logger) error {
+func addSpecs(service *handler3.OpenAPIService, static map[string]cached.Value[*spec3.OpenAPI], crds []*apiextensionsv1.CustomResourceDefinition, specs []map[string]cached.Value[*spec3.OpenAPI], log logr.Logger) {
 	// start with static specs
 	byGroupVersionSpecs := make(map[string][]cached.Value[*spec3.OpenAPI])
 	for gvPath, spec := range static {
@@ -238,8 +235,6 @@ func addSpecs(service *handler3.OpenAPIService, static map[string]cached.Value[*
 			specs)
 		service.UpdateGroupVersionLazy(gvPath, gvSpec)
 	}
-
-	return nil
 }
 
 func apiConfigurationKey(orderedCRDs []*apiextensionsv1.CustomResourceDefinition, specs []map[string]cached.Value[*spec3.OpenAPI]) (string, error) {