Add support for parsing profile yaml files

Add code to parse profile configuration yaml
The parsing function is global and returns a client
which can then be used to get or apply specific parts
of the configuration on top of an extracted helm chart.
P14: Add unit test that covers both ProcessProfileYaml
     and CopyConfigurationOverrides
P15: Adding mock_charts and mock_profiles
     We expect to reuse these files for other unit tests

Issue-ID: ONAPARC-348
Change-Id: I4504d0b158fdfef476b8c2a461d33306926545d7
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/src/k8splugin/internal/rb/profile_yaml.go b/src/k8splugin/internal/rb/profile_yaml.go
new file mode 100644
index 00000000..ba55fba9
--- /dev/null
+++ b/src/k8splugin/internal/rb/profile_yaml.go
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2018 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 rb
+
+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
+}