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util.go
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util.go
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package rsync
import (
"bytes"
"fmt"
"os/exec"
"runtime"
"k8s.io/klog"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
var (
testRsyncCommand = []string{"rsync", "--version"}
testTarCommand = []string{"tar", "--version"}
)
// executeWithLogging will execute a command and log its output
func executeWithLogging(e executor, cmd []string) error {
w := &bytes.Buffer{}
err := e.Execute(cmd, nil, w, w)
klog.V(4).Infof("%s", w.String())
klog.V(4).Infof("error: %v", err)
return err
}
// isWindows returns true if the current platform is windows
func isWindows() bool {
return runtime.GOOS == "windows"
}
// hasLocalRsync returns true if rsync is in current exec path
func hasLocalRsync() bool {
_, err := exec.LookPath("rsync")
if err != nil {
return false
}
return true
}
func isExitError(err error) bool {
if err == nil {
return false
}
_, exitErr := err.(*exec.ExitError)
return exitErr
}
func checkRsync(e executor) error {
return executeWithLogging(e, testRsyncCommand)
}
func checkTar(e executor) error {
return executeWithLogging(e, testTarCommand)
}
func rsyncFlagsFromOptions(o *RsyncOptions) []string {
flags := []string{}
if o.Quiet {
flags = append(flags, "-q")
} else {
flags = append(flags, "-v")
}
if o.Delete {
flags = append(flags, "--delete")
}
if o.Compress {
flags = append(flags, "-z")
}
if len(o.RsyncInclude) > 0 {
for _, include := range o.RsyncInclude {
flags = append(flags, fmt.Sprintf("--include=%s", include))
}
}
if len(o.RsyncExclude) > 0 {
for _, exclude := range o.RsyncExclude {
flags = append(flags, fmt.Sprintf("--exclude=%s", exclude))
}
}
if o.RsyncProgress {
flags = append(flags, "--progress")
}
if o.RsyncNoPerms {
flags = append(flags, "--no-perms")
}
return flags
}
func tarFlagsFromOptions(o *RsyncOptions) []string {
flags := []string{}
if !o.Quiet {
flags = append(flags, "-v")
}
if len(o.RsyncInclude) > 0 {
for _, include := range o.RsyncInclude {
flags = append(flags, fmt.Sprintf("**/%s", include))
}
// if we have explicit files or a pattern of filenames to include,
// maintain similar behavior to tar, and include anything else
// that would have otherwise been included
flags = append(flags, "*")
}
if len(o.RsyncExclude) > 0 {
for _, exclude := range o.RsyncExclude {
flags = append(flags, fmt.Sprintf("--exclude=%s", exclude))
}
}
return flags
}
func rsyncSpecificFlags(o *RsyncOptions) []string {
flags := []string{}
if o.RsyncProgress {
flags = append(flags, "--progress")
}
if o.RsyncNoPerms {
flags = append(flags, "--no-perms")
}
if o.Compress {
flags = append(flags, "-z")
}
return flags
}
type podAPIChecker struct {
client kubernetes.Interface
namespace string
podName string
}
// CheckPods will check if pods exists in the provided context
func (p podAPIChecker) CheckPod() error {
_, err := p.client.CoreV1().Pods(p.namespace).Get(p.podName, metav1.GetOptions{})
return err
}