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kubectl.go
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kubectl.go
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package main
import (
"encoding/json"
semver "github.com/Masterminds/semver/v3"
"github.com/magefile/mage/sh"
"github.com/pkg/errors"
)
const KUBECTL_VERSION_CONSTRAINT = ">= 1.20.0"
func kubectlBinary() string {
return binaryWithExt("kubectl")
}
func kubectlOutput(args ...string) (string, error) {
return sh.Output(kubectlBinary(), args...)
}
func kubectlRun(args ...string) error {
return sh.Run(kubectlBinary(), args...)
}
func kubectlVersion() (*semver.Version, error) {
output, err := kubectlOutput("version", "--client=true", "--output=json")
if err != nil {
return nil, errors.Errorf("error running version cmd: %v", err)
}
var obj struct {
ClientVersion struct {
GitVersion string `json:"gitVersion"`
} `json:"clientVersion"`
}
err = json.Unmarshal([]byte(output), &obj)
if err != nil {
return nil, errors.Errorf("error parsing version cmd output: %v", err)
}
version, err := semver.NewVersion(obj.ClientVersion.GitVersion)
if err != nil {
return nil, errors.Errorf("error parsing version: %v", err)
}
return version, nil
}
func kubectlCheck() error {
version, err := kubectlVersion()
if err != nil {
return errors.Errorf("error getting version: %v", err)
}
return constraintCheck(version, KUBECTL_VERSION_CONSTRAINT, "kubectl")
}