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/*******************************************************************************
*
* Copyright 2017 Stefan Majewsky <majewsky@gmx.net>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
package prompt
import (
"os"
"os/exec"
"path/filepath"
"strings"
yaml "go.yaml.in/yaml/v3"
)
func getKubernetesField() string {
_, err := os.Stat("/x/bin/u8s")
if err == nil {
return getKubernetesFieldViaU8S()
}
configPaths := filepath.SplitList(os.Getenv("KUBECONFIG"))
var context string
for _, configPath := range configPaths {
context = getKubernetesContext(configPath)
if context != "" {
break
}
}
if context == "" {
return ""
}
namespaceBytes, err := os.ReadFile(filepath.Join(os.Getenv("HOME"), ".kubectl-namespace"))
namespace := strings.TrimSpace(string(namespaceBytes))
if err != nil {
if !os.IsNotExist(err) {
handleError(err)
}
namespace = ""
}
return buildKubernetesField(context, namespace)
}
func getKubernetesContext(configPath string) string {
buf, err := os.ReadFile(configPath)
if err != nil {
//non-existence is acceptable, just make the caller continue with the next configPath
if !os.IsNotExist(err) {
handleError(err)
}
return ""
}
var data struct {
CurrentContext string `yaml:"current-context"`
}
err = yaml.Unmarshal(buf, &data)
handleError(err)
return strings.TrimSpace(data.CurrentContext)
}
func getKubernetesFieldViaU8S() string {
stdout, err := exec.Command("u8s", "env").Output()
if err != nil {
return ""
}
var (
context string
namespace string
)
for _, line := range strings.Split(string(stdout), "\n") {
fields := strings.SplitN(strings.TrimSpace(line), "=", 2)
if len(fields) != 2 {
continue
}
switch fields[0] {
case "U8S_CONTEXT":
context = fields[1]
case "U8S_NAMESPACE":
namespace = fields[1]
}
}
return buildKubernetesField(context, namespace)
}
func buildKubernetesField(context, namespace string) string {
if context == "" {
return ""
}
if !strings.Contains(context, "qa") {
//visual warning when working in a productive region
context = withColor("1;41", context)
}
if namespace != "" {
context += "/" + namespace
}
return withType("kube", context)
}
func getOpenstackField() string {
cloudName := os.Getenv("CURRENT_OS_CLOUD")
if cloudName == "" {
return ""
}
return withType("cloud", cloudName)
}
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