chore: linting

.golangci.toml

@@ -15,6 +15,10 @@
     "goconst",
     "nestif",
     "funlen",
+    "varnamelen",
+    "ireturn",
+    "exhaustivestruct",
+    "cyclop",
     "bodyclose", # https://github.com/timakin/bodyclose/pull/14
   ]
 
@@ -23,21 +27,6 @@
     [[issues.exclude-rules]]
       path = "internal/platform/providers/providers.go"
       linters = ["gocritic"]
-    [[issues.exclude-rules]]
-      path = "internal/image/provider/gcs.go"
-      linters = ["exhaustivestruct"]
-    [[issues.exclude-rules]]
-      path = "internal/platform/providers/providers_test.go"
-      linters = ["exhaustivestruct"]
-    [[issues.exclude-rules]]
-      path = "cmd/ims"
-      linters = ["exhaustivestruct"]
-    [[issues.exclude-rules]]
-      path = "internal/image/encoder/png/png.go"
-      linters = ["exhaustivestruct"]
-    [[issues.exclude-rules]]
-      path = "internal/image/provider/proxy.go"
-      linters = ["exhaustivestruct"]
     [[issues.exclude-rules]]
       linters = ["wsl"]
       text = "declarations should never be cuddled"

cmd/ims/app/server.go

@@ -25,7 +25,6 @@ func MountEndpoint(mux *http.ServeMux, endpoint string, handler http.Handler) {
 
 // ServerOpts is the options for starting a new Server.
 type ServerOpts struct {
-
 	// Addr is the address to listen for http requests on.
 	Addr string
 
@@ -134,5 +133,9 @@ func Serve(opts *ServerOpts) error {
 
 	logrus.WithField("address", opts.Addr).Info("now listening")
 
-	return http.ListenAndServe(opts.Addr, n)
+	if err := http.ListenAndServe(opts.Addr, n); err != nil {
+		return errors.Wrap(err, "could not listen on the address for http traffic")
+	}
+
+	return nil
 }

internal/platform/providers/providers.go

@@ -38,7 +38,12 @@ func NewProviders(providers map[string]provider.Provider) *Providers {
 func GetUnderlyingTransport(ctx context.Context, originURL *url.URL) (http.RoundTripper, error) {
 	switch originURL.Scheme {
 	case "gs":
-		return provider.NewGCSTransport(ctx)
+		transport, err := provider.NewGCSTransport(ctx)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not create transport for scheme")
+		}
+
+		return transport, nil
 	default:
 		return http.DefaultTransport, nil
 	}
@@ -79,9 +84,19 @@ func WrapCacheRoundTripper(ctx context.Context, underlyingTransport http.RoundTr
 func GetRemoteProviderClient(ctx context.Context, originURL *url.URL, transport http.RoundTripper) (provider.Provider, error) {
 	switch originURL.Scheme {
 	case "gs":
-		return provider.NewGCS(ctx, originURL.Host, transport)
+		transport, err := provider.NewGCS(ctx, originURL.Host, transport)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not create provider for the gs scheme")
+		}
+
+		return transport, nil
 	case "s3":
-		return provider.NewS3(originURL.Host, transport)
+		transport, err := provider.NewS3(originURL.Host, transport)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not create provider for the s3 scheme")
+		}
+
+		return transport, nil
 	case "http", "https":
 		return provider.NewOrigin(originURL, transport), nil
 	default: