Resolve the helm templates

Resolving the helm templates for each of the apps
in the compositeApp by utilizing the helm libraries
and thus getting the sorted templates with all values
rendered.
This is a subtask of adding instantiation APIs.

Issue-ID: MULTICLOUD-1041
Signed-off-by: Rajamohan Raj <rajamohan.raj@intel.com>
Change-Id: Id4fddda69b5276b2409d835723b11367400ab6ea

1 files changed, 109 insertions, 0 deletions

diff --git a/src/orchestrator/utils/profile_yaml.go b/src/orchestrator/utils/profile_yaml.go
new file mode 100644
index 00000000..91687c0a
--- /dev/null
+++ b/src/orchestrator/utils/profile_yaml.go
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2020 Intel Corporation, Inc
+ *
+ * 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 utils
+
+import (
+	"io/ioutil"
+	"log"
+	"path/filepath"
+
+	"github.com/ghodss/yaml"
+	pkgerrors "github.com/pkg/errors"
+)
+
+/*
+#Sample Yaml format for profile manifest.yaml
+---
+version: v1
+type:
+  values: "values_override.yaml"
+  configresource:
+    - filepath: config.yaml
+      chartpath: chart/config/resources/config.yaml
+    - filepath: config2.yaml
+      chartpath: chart/config/resources/config2.yaml
+*/
+
+type overrideFiles struct {
+	FilePath  string `yaml:"filepath"`
+	ChartPath string `yaml:"chartpath"`
+}
+
+type supportedOverrides struct {
+	ConfigResource []overrideFiles `yaml:"configresource"`
+	Values         string          `yaml:"values"`
+}
+
+type profileOverride struct {
+	Version string             `yaml:"version"`
+	Type    supportedOverrides `yaml:"type"`
+}
+
+type ProfileYamlClient struct {
+	path     string
+	override profileOverride
+}
+
+func (p ProfileYamlClient) Print() {
+	log.Println(p.override)
+}
+
+//GetValues returns a path to the override values.yam
+//that was part of the profile
+func (p ProfileYamlClient) GetValues() string {
+	return filepath.Join(p.path, p.override.Type.Values)
+}
+
+//CopyConfigurationOverrides copies the various files that are
+//provided as overrides to their corresponding locations within
+//the destination chart.
+func (p ProfileYamlClient) CopyConfigurationOverrides(chartPath string) error {
+
+	//Iterate over each configresource and copy that file into
+	//the respective path in the chart.
+	for _, v := range p.override.Type.ConfigResource {
+		data, err := ioutil.ReadFile(filepath.Join(p.path, v.FilePath))
+		if err != nil {
+			return pkgerrors.Wrap(err, "Reading configuration file")
+		}
+		err = ioutil.WriteFile(filepath.Join(chartPath, v.ChartPath), data, 0644)
+		if err != nil {
+			return pkgerrors.Wrap(err, "Writing configuration file into chartpath")
+		}
+	}
+
+	return nil
+}
+
+//ProcessProfileYaml parses the manifest.yaml file that is part of the profile
+//package and creates the appropriate structures out of it.
+func ProcessProfileYaml(fpath string, manifestFileName string) (ProfileYamlClient, error) {
+
+	p := filepath.Join(fpath, manifestFileName)
+	data, err := ioutil.ReadFile(p)
+	if err != nil {
+		return ProfileYamlClient{}, pkgerrors.Wrap(err, "Reading manifest file")
+	}
+
+	out := profileOverride{}
+	err = yaml.Unmarshal(data, &out)
+	if err != nil {
+		return ProfileYamlClient{}, pkgerrors.Wrap(err, "Marshaling manifest yaml file")
+	}
+
+	return ProfileYamlClient{path: fpath, override: out}, nil
+}