Fix: index out of range when merging two repo indexes (#5146)

pkg/simple/client/openpitrix/helmrepoindex/repo_index.go

@@ -99,6 +99,9 @@ func MergeRepoIndex(repo *v1alpha1.HelmRepo, index *helmrepo.IndexFile, existsSa
 
 	allAppNames := make(map[string]struct{}, len(index.Entries))
 	for name, versions := range index.Entries {
+		if len(versions) == 0 {
+			continue
+		}
 		// add new applications
 		if application, exists := saved.Applications[name]; !exists {
 			application = &Application{

pkg/simple/client/openpitrix/helmrepoindex/repo_index_test.go

@@ -50,5 +50,102 @@ func TestLoadRepo(t *testing.T) {
 		_ = chartData
 		break
 	}
-
+}
+
+var indexData1 = `
+apiVersion: v1
+entries:
+  apisix: []
+  apisix-dashboard:
+  - apiVersion: v2
+    appVersion: 2.9.0
+    created: "2021-11-15T08:23:00.343784368Z"
+    description: A Helm chart for Apache APISIX Dashboard
+    digest: 76f794b1300f7bfb756ede352fe71eb863b89f1995b495e8b683990709e310ad
+    icon: https://apache.org/logos/res/apisix/apisix.png
+    maintainers:
+    - email: zhangjintao@apache.org
+      name: tao12345666333
+    name: apisix-dashboard
+    type: application
+    urls:
+    - https://charts.kubesphere.io/main/apisix-dashboard-0.3.0.tgz
+    version: 0.3.0
+`
+var indexData2 = `
+apiVersion: v1
+entries:
+  apisix:
+  - apiVersion: v2
+    appVersion: 2.10.0
+    created: "2021-11-15T08:23:00.343234584Z"
+    dependencies:
+    - condition: etcd.enabled
+      name: etcd
+      repository: https://charts.bitnami.com/bitnami
+      version: 6.2.6
+    - alias: dashboard
+      condition: dashboard.enabled
+      name: apisix-dashboard
+      repository: https://charts.apiseven.com
+      version: 0.3.0
+    - alias: ingress-controller
+      condition: ingress-controller.enabled
+      name: apisix-ingress-controller
+      repository: https://charts.apiseven.com
+      version: 0.8.0
+    description: A Helm chart for Apache APISIX
+    digest: fed38a11c0fb54d385144767227e43cb2961d1b50d36ea207fdd122bddd3de28
+    icon: https://apache.org/logos/res/apisix/apisix.png
+    maintainers:
+    - email: zhangjintao@apache.org
+      name: tao12345666333
+    name: apisix
+    type: application
+    urls:
+    - https://charts.kubesphere.io/main/apisix-0.7.2.tgz
+    version: 0.7.2
+  apisix-dashboard:
+  - apiVersion: v2
+    appVersion: 2.9.0
+    created: "2021-11-15T08:23:00.343784368Z"
+    description: A Helm chart for Apache APISIX Dashboard
+    digest: 76f794b1300f7bfb756ede352fe71eb863b89f1995b495e8b683990709e310ad
+    icon: https://apache.org/logos/res/apisix/apisix.png
+    maintainers:
+    - email: zhangjintao@apache.org
+      name: tao12345666333
+    name: apisix-dashboard
+    type: application
+    urls:
+    - https://charts.kubesphere.io/main/apisix-dashboard-0.3.0.tgz
+    version: 0.3.0
+`
+
+func TestMergeRepo(t *testing.T) {
+	repoIndex1, err := loadIndex([]byte(indexData1))
+	if err != nil {
+		t.Errorf("failed to load repo index")
+		t.Failed()
+	}
+	existsSavedIndex := &SavedIndex{}
+	repoCR := &v1alpha1.HelmRepo{}
+
+	savedIndex1 := MergeRepoIndex(repoCR, repoIndex1, existsSavedIndex)
+	if len(savedIndex1.Applications) != 1 {
+		t.Errorf("faied to merge repo index with empty repo")
+		t.Failed()
+	}
+
+	repoIndex2, err := loadIndex([]byte(indexData2))
+	if err != nil {
+		t.Errorf("failed to load repo index")
+		t.Failed()
+	}
+
+	savedIndex2 := MergeRepoIndex(repoCR, repoIndex2, savedIndex1)
+	if len(savedIndex2.Applications) != 2 {
+		t.Errorf("faied to merge two repo index")
+		t.Failed()
+	}
 }