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values.go
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values.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Greenhouse contributors
// SPDX-License-Identifier: Apache-2.0
package helm
import (
"context"
"encoding/json"
"sort"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
greenhousev1alpha1 "github.com/cloudoperators/greenhouse/pkg/apis/greenhouse/v1alpha1"
)
func GetPluginOptionValuesForPlugin(ctx context.Context, c client.Client, plugin *greenhousev1alpha1.Plugin) ([]greenhousev1alpha1.PluginOptionValue, error) {
var pluginDefinition = new(greenhousev1alpha1.PluginDefinition)
if err := c.Get(ctx, types.NamespacedName{Namespace: "", Name: plugin.Spec.PluginDefinition}, pluginDefinition); err != nil {
return nil, err
}
values := mergePluginAndPluginOptionValueSlice(pluginDefinition.Spec.Options, plugin.Spec.OptionValues)
// Enrich with default greenhouse values.
greenhouseValues, err := getGreenhouseValues(ctx, c, *plugin)
if err != nil {
return nil, err
}
values = mergePluginOptionValues(values, greenhouseValues)
return values, nil
}
func mergePluginAndPluginOptionValueSlice(pluginOptions []greenhousev1alpha1.PluginOption, pluginOptionValues []greenhousev1alpha1.PluginOptionValue) []greenhousev1alpha1.PluginOptionValue {
// Make sure there's always a non-nil slice.
out := make([]greenhousev1alpha1.PluginOptionValue, 0)
defer func() {
sort.Slice(out, func(i, j int) bool {
return out[i].Name < out[j].Name
})
}()
// If the PluginDefinition doesn't define values, we're done.
if pluginOptions == nil {
return pluginOptionValues
}
for _, option := range pluginOptions {
if option.Default != nil {
out = append(out, greenhousev1alpha1.PluginOptionValue{Name: option.Name, Value: option.Default})
}
}
for _, pluginVal := range pluginOptionValues {
out = setOrAppendNameValue(out, pluginVal)
}
return out
}
// mergePluginOptionValues merges the given src into the dst PluginOptionValue slice.
func mergePluginOptionValues(dst, src []greenhousev1alpha1.PluginOptionValue) []greenhousev1alpha1.PluginOptionValue {
if dst == nil {
dst = make([]greenhousev1alpha1.PluginOptionValue, 0)
}
for _, srcOptionValue := range src {
dst = setOrAppendNameValue(dst, srcOptionValue)
}
return dst
}
// getGreenhouseValues generate values for greenhouse core resources in the form:
//
// global:
// greenhouse:
// clusterNames:
// - <name>
// teams:
// - <name>
func getGreenhouseValues(ctx context.Context, c client.Client, p greenhousev1alpha1.Plugin) ([]greenhousev1alpha1.PluginOptionValue, error) {
greenhouseValues := make([]greenhousev1alpha1.PluginOptionValue, 0)
var clusterList = new(greenhousev1alpha1.ClusterList)
if err := c.List(ctx, clusterList, &client.ListOptions{Namespace: p.GetNamespace()}); err != nil {
return nil, err
}
clusterNames := make([]string, len(clusterList.Items))
for idx, cluster := range clusterList.Items {
clusterNames[idx] = cluster.Name
}
clusterNamesVal, err := stringSliceToHelmValue(clusterNames)
if err != nil {
return nil, err
}
greenhouseValues = append(greenhouseValues, greenhousev1alpha1.PluginOptionValue{
Name: "global.greenhouse.clusterNames",
Value: clusterNamesVal,
ValueFrom: nil,
})
// Teams within the organization.
var teamList = new(greenhousev1alpha1.TeamList)
if err := c.List(ctx, teamList, client.InNamespace(p.GetNamespace())); err != nil {
return nil, err
}
teamNames := make([]string, len(teamList.Items))
for idx, team := range teamList.Items {
teamNames[idx] = team.Name
}
teamNamesVal, err := stringSliceToHelmValue(teamNames)
if err != nil {
return nil, err
}
greenhouseValues = append(greenhouseValues, greenhousev1alpha1.PluginOptionValue{
Name: "global.greenhouse.teamNames",
Value: teamNamesVal,
ValueFrom: nil,
})
// append orgName
orgNameVal, err := json.Marshal(p.GetNamespace())
if err != nil {
return nil, err
}
greenhouseValues = append(greenhouseValues, greenhousev1alpha1.PluginOptionValue{
Name: "global.greenhouse.organizationName",
Value: &apiextensionsv1.JSON{Raw: orgNameVal},
ValueFrom: nil,
})
// append clusterName if set
if p.Spec.ClusterName != "" {
clusterNameVal, err := json.Marshal(p.Spec.ClusterName)
if err != nil {
return nil, err
}
greenhouseValues = append(greenhouseValues, greenhousev1alpha1.PluginOptionValue{
Name: "global.greenhouse.clusterName",
Value: &apiextensionsv1.JSON{Raw: clusterNameVal},
ValueFrom: nil,
})
}
return greenhouseValues, nil
}
func setOrAppendNameValue(valueSlice []greenhousev1alpha1.PluginOptionValue, valueToSetOrAppend greenhousev1alpha1.PluginOptionValue) []greenhousev1alpha1.PluginOptionValue {
for idx, val := range valueSlice {
if val.Name == valueToSetOrAppend.Name {
valueSlice[idx].Value = valueToSetOrAppend.Value
return valueSlice
}
}
return append(valueSlice, valueToSetOrAppend)
}
// stringSliceToHelmValue sorts theSlice, marshals it to JSON and returns an apiextensionsv1.JSON object.
func stringSliceToHelmValue(theSlice []string) (*apiextensionsv1.JSON, error) {
sort.Strings(theSlice)
raw, err := json.Marshal(theSlice)
if err != nil {
return nil, err
}
return &apiextensionsv1.JSON{Raw: raw}, nil
}