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cmd.go
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cmd.go
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package gitrepod
import (
"fmt"
"io"
"os/exec"
"sync"
)
func doCommand(cmd *exec.Cmd, stdin io.Reader, stdout, stderr io.Writer) error {
cmdStdin, err := cmd.StdinPipe()
if err != nil {
return err
}
cmdStdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
cmdStderr, err := cmd.StderrPipe()
if err != nil {
return err
}
wg := &sync.WaitGroup{}
go func() {
io.Copy(cmdStdin, stdin)
cmdStdin.Close()
}()
wg.Add(2)
go func() {
io.Copy(stdout, cmdStdout)
wg.Done()
}()
go func() {
io.Copy(stderr, cmdStderr)
wg.Done()
}()
if err := cmd.Start(); err != nil {
return fmt.Errorf("error at start cmd: %s", err)
}
wg.Wait()
if err := cmd.Wait(); err != nil {
return fmt.Errorf("error at wait cmd: %s", err)
}
return nil
}