Log message for no search results (#306)

* Log message for no search results

* update message

functions/go/search-replace/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/GoogleContainerTools/kpt-functions-catalog/functions/go/search-replace/searchreplace"
 	"github.com/GoogleContainerTools/kpt-functions-catalog/functions/go/search-replace/generated"
+	"github.com/GoogleContainerTools/kpt-functions-catalog/functions/go/search-replace/searchreplace"
 	"sigs.k8s.io/kustomize/kyaml/fn/framework"
 	kyaml "sigs.k8s.io/kustomize/kyaml/yaml"
 )
@@ -74,8 +74,13 @@ func getSearchReplaceParams(fc interface{}) (searchreplace.SearchReplace, error)
 // equivalent items([]framework.Item)
 func searchResultsToItems(sr searchreplace.SearchReplace) []framework.Item {
 	var items []framework.Item
+	if len(sr.Results) == 0 {
+		items = append(items, framework.Item{
+			Message: "no matches",
+		})
+		return items
+	}
 	for _, res := range sr.Results {
-
 		var message string
 		if sr.PutComment != "" || sr.PutValue != "" {
 			message = fmt.Sprintf("Mutated field value to %q", res.Value)

tests/search-replace/no-results/simple/.expected/config.yaml

@@ -0,0 +1,2 @@
+runCount: 2
+exitCode: 0

tests/search-replace/no-results/simple/.expected/results.yaml

@@ -0,0 +1,3 @@
+name: search-replace
+items:
+- message: 'no matches'

tests/search-replace/no-results/simple/.krmignore

@@ -0,0 +1 @@
+.expected

tests/search-replace/no-results/simple/fn-config.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: my-func-config
+  annotations:
+    config.k8s.io/function: |
+      container:
+        image: gcr.io/kpt-fn/search-replace:unstable
+    config.kubernetes.io/local-config: 'true'
+data:
+  by-value: non-existent-value

tests/search-replace/no-results/simple/resources.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+data:
+  some-key: some-value