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arguments.go
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arguments.go
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// Copyright 2021 Flant JSC
//
// 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 internal
import (
"regexp"
"github.com/flant/addon-operator/sdk"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
func GetArgFromUnstructuredPodWithRegexp(obj *unstructured.Unstructured, exp *regexp.Regexp, captureIndex int, containerName string) (string, error) {
var pod v1.Pod
err := sdk.FromUnstructured(obj, &pod)
if err != nil {
return "", err
}
return GetArgPodWithRegexp(&pod, exp, captureIndex, containerName), nil
}
func GetArgPodWithRegexp(pod *v1.Pod, exp *regexp.Regexp, captureIndex int, containerName string) string {
containerIndex := 0
if containerName != "" {
for i, c := range pod.Spec.Containers {
if c.Name == containerName {
containerIndex = i
break
}
}
}
match := parseFromArgs(exp, pod.Spec.Containers[containerIndex].Command, captureIndex)
if match != "" {
return match
}
match = parseFromArgs(exp, pod.Spec.Containers[containerIndex].Args, captureIndex)
if match != "" {
return match
}
return ""
}
func parseFromArgs(exp *regexp.Regexp, args []string, captureIndex int) string {
for _, arg := range args {
clusterDomainMatches := exp.FindAllStringSubmatch(arg, -1)
if len(clusterDomainMatches) < 1 {
continue
}
// 0 - index is fullmatch
indx := captureIndex + 1
if len(clusterDomainMatches[0]) < indx+1 {
continue
}
return clusterDomainMatches[0][indx]
}
return ""
}