Skip Go linting for plugins with no Go SDK

For example, plugins like LogExplorer that only provide frontend
components (Explore views) don't have an sdk/go directory and should
be skipped.

Signed-off-by: Jeremy Rickards <jeremy.rickards@sap.com>

Author: rickardsjp

scripts/golangci-lint/golangci-lint.go

@@ -25,6 +25,13 @@ func main() {
 	var isError bool
 
 	for _, workspace := range npm.MustGetWorkspaces(".") {
+		// skip plugin go validation if there is no Go SDK
+		sdkGoPath := workspace + "/sdk/go"
+		if _, err := os.Stat(sdkGoPath); os.IsNotExist(err) {
+			logrus.Infof("skipping golangci-lint for %s (no Go SDK)", workspace)
+			continue
+		}
+
 		cmd := exec.Command("golangci-lint", "run")
 		cmd.Dir = workspace
 		cmd.Stdout = os.Stdout