Add cluster selector exist operator for empty key value (#21)

Add .idea path to gitignore

Signed-off-by: melserngawy <[email protected]>

Author: serngawy

.gitignore

@@ -21,3 +21,4 @@ vendor/
 
 # IDE
 .vscode
+.idea

build/common/config/.golangci.yml

@@ -27,6 +27,7 @@ run:
 linters:
   enable-all: true
   disable:
+    - nestif
     - depguard
     - dupl
     - gochecknoglobals

internal/plugin.go

@@ -540,9 +540,13 @@ func (p *Plugin) createPlacementRule(policyConf *types.PolicyConfig) (
 		matchExpressions := []map[string]interface{}{}
 		for _, label := range keys {
 			matchExpression := map[string]interface{}{
-				"key":      label,
-				"operator": "In",
-				"values":   []string{policyConf.Placement.ClusterSelectors[label]},
+				"key": label,
+			}
+			if policyConf.Placement.ClusterSelectors[label] == "" {
+				matchExpression["operator"] = "Exist"
+			} else {
+				matchExpression["operator"] = "In"
+				matchExpression["values"] = []string{policyConf.Placement.ClusterSelectors[label]}
 			}
 			matchExpressions = append(matchExpressions, matchExpression)
 		}

internal/plugin_test.go

@@ -575,8 +575,9 @@ func TestCreatePlacementRuleClusterSelectors(t *testing.T) {
 	p.PolicyDefaults.Namespace = "my-policies"
 	policyConf := types.PolicyConfig{Name: "policy-app-config"}
 	policyConf.Placement.ClusterSelectors = map[string]string{
-		"cloud": "red hat",
-		"game":  "pacman",
+		"cloud":  "red hat",
+		"doesIt": "",
+		"game":   "pacman",
 	}
 
 	name, err := p.createPlacementRule(&policyConf)
@@ -603,6 +604,8 @@ spec:
               operator: In
               values:
                 - red hat
+            - key: doesIt
+              operator: Exist
             - key: game
               operator: In
               values: