Add unset nature to set and set string flags

pkg/util/strvals/strvals.go

@@ -17,6 +17,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"reflect"
 	"strconv"
 	"strings"
 
@@ -250,7 +251,18 @@ func set(data map[string]interface{}, key string, val interface{}) {
 	if len(key) == 0 {
 		return
 	}
-	data[key] = val
+
+	rt := reflect.TypeOf(val)
+	switch rt.Kind() {
+	case reflect.String:
+		if len(val.(string)) < 1 {
+			data[key] = nil
+		} else {
+			data[key] = val
+		}
+	default:
+		data[key] = val
+	}
 }
 
 func setIndex(list []interface{}, index int, val interface{}) (l2 []interface{}, err error) {
@@ -271,7 +283,16 @@ func setIndex(list []interface{}, index int, val interface{}) (l2 []interface{},
 		copy(newlist, list)
 		list = newlist
 	}
-	list[index] = val
+	switch reflect.TypeOf(val).Kind() {
+	case reflect.String:
+		if len(val.(string)) > 0 {
+			list[index] = val
+		} else {
+			list[index] = nil
+		}
+	default:
+		list[index] = val
+	}
 	return list, nil
 }
 

pkg/util/strvals/strvals_test.go

@@ -0,0 +1,72 @@
+package strvals
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/pkg/errors"
+	"gotest.tools/assert"
+	"log"
+	"testing"
+)
+
+func TestSetStringFlag(t *testing.T) {
+	rawConfig := getActualRawConfig()
+	s := "deployments.dev.helm.values.containers[0]="
+	err := ParseIntoString(s, rawConfig)
+	if err != nil {
+		fmt.Println(errors.Wrap(err, "parsing --set-string flag"))
+		log.Fatal(err)
+	}
+	b, err := json.Marshal(rawConfig)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println("output : " + string(b))
+	assert.DeepEqual(t, rawConfig, getExpectedRawConfigForSetString())
+}
+
+func TestSetFlag(t *testing.T) {
+	s := "deployments.dev.helm.values.containers[1].image="
+	rawConfig := getActualRawConfig()
+	err := ParseInto(s, rawConfig)
+	if err != nil {
+		fmt.Println(errors.Wrap(err, "parsing --set flag"))
+		log.Fatal(err)
+	}
+	b, err := json.Marshal(rawConfig)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println("output : " + string(b))
+	assert.DeepEqual(t, rawConfig, getExpectedRawConfigForSet())
+}
+
+func getExpectedRawConfigForSet() map[string]interface{} {
+	jsonStr := "{\"deployments\":{\"dev\":{\"helm\":{\"values\":{\"containers\":[{\"image\":\"alpine\"},{\"image\":null}]}}}},\"name\":\"run-pipelines-demo\",\"pipelines\":{\"deploy\":\"create_deployments --all\",\"dev\":\"run_pipelines deploy --set deployments.dev.helm.values.containers[0].image=nginx --set-string deployments.dev.helm.values.containers[0].name=mynginx\"},\"version\":\"v2beta1\"}"
+	rawConfig := map[string]interface{}{}
+	err := json.Unmarshal([]byte(jsonStr), &rawConfig)
+	if err != nil {
+		fmt.Println(err)
+	}
+	return rawConfig
+}
+
+func getExpectedRawConfigForSetString() map[string]interface{} {
+	jsonStr := "{\"deployments\":{\"dev\":{\"helm\":{\"values\":{\"containers\":[null,{\"image\":\"ns\"}]}}}},\"name\":\"run-pipelines-demo\",\"pipelines\":{\"deploy\":\"create_deployments --all\",\"dev\":\"run_pipelines deploy --set deployments.dev.helm.values.containers[0].image=nginx --set-string deployments.dev.helm.values.containers[0].name=mynginx\"},\"version\":\"v2beta1\"}"
+	rawConfig := map[string]interface{}{}
+	err := json.Unmarshal([]byte(jsonStr), &rawConfig)
+	if err != nil {
+		fmt.Println(err)
+	}
+	return rawConfig
+}
+
+func getActualRawConfig() map[string]interface{} {
+	jsonStr := "{\n  \"deployments\": {\n    \"dev\": { \"helm\": { \"values\": { \"containers\": [{ \"image\": \"alpine\" },{ \"image\": \"ns\" }] } } }\n  },\n  \"name\": \"run-pipelines-demo\",\n  \"pipelines\": {\n    \"deploy\": \"create_deployments --all\",\n    \"dev\": \"run_pipelines deploy --set deployments.dev.helm.values.containers[0].image=nginx --set-string deployments.dev.helm.values.containers[0].name=mynginx\"\n  },\n  \"version\": \"v2beta1\"\n}\n"
+	rawConfig := map[string]interface{}{}
+	err := json.Unmarshal([]byte(jsonStr), &rawConfig)
+	if err != nil {
+		fmt.Println(err)
+	}
+	return rawConfig
+}