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util.go
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util.go
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package rsync
import (
"bytes"
"os"
"os/exec"
"runtime"
"strings"
"github.com/golang/glog"
"github.com/spf13/cobra"
)
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)
glog.V(4).Infof("%s", w.String())
glog.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
}
// siblingCommand returns a sibling command to the current command
func siblingCommand(cmd *cobra.Command, name string) string {
c := cmd.Parent()
command := []string{}
for c != nil {
glog.V(5).Infof("Found parent command: %s", c.Name())
command = append([]string{c.Name()}, command...)
c = c.Parent()
}
// Replace the root command with what was actually used
// in the command line
glog.V(4).Infof("Setting root command to: %s", os.Args[0])
command[0] = os.Args[0]
// Append the sibling command
command = append(command, name)
glog.V(4).Infof("The sibling command is: %s", strings.Join(command, " "))
return strings.Join(command, " ")
}
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)
}