feat: add profile/install/uninstall/upgrade command (#538)

pkg/cmd/hgctl/helm/tpath/util.go

@@ -0,0 +1,58 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tpath
+
+import (
+	"github.com/alibaba/higress/pkg/cmd/hgctl/util"
+	"gopkg.in/yaml.v2"
+	yaml2 "sigs.k8s.io/yaml"
+)
+
+// AddSpecRoot adds a root node called "spec" to the given tree and returns the resulting tree.
+func AddSpecRoot(tree string) (string, error) {
+	t, nt := make(map[string]any), make(map[string]any)
+	if err := yaml.Unmarshal([]byte(tree), &t); err != nil {
+		return "", err
+	}
+	nt["spec"] = t
+	out, err := yaml.Marshal(nt)
+	if err != nil {
+		return "", err
+	}
+	return string(out), nil
+}
+
+// GetSpecSubtree returns the subtree under "spec".
+func GetSpecSubtree(yml string) (string, error) {
+	return GetConfigSubtree(yml, "spec")
+}
+
+// GetConfigSubtree returns the subtree at the given path.
+func GetConfigSubtree(manifest, path string) (string, error) {
+	root := make(map[string]any)
+	if err := yaml2.Unmarshal([]byte(manifest), &root); err != nil {
+		return "", err
+	}
+
+	nc, _, err := GetPathContext(root, util.PathFromString(path), false)
+	if err != nil {
+		return "", err
+	}
+	out, err := yaml2.Marshal(nc.Node)
+	if err != nil {
+		return "", err
+	}
+	return string(out), nil
+}