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package svn2git2aur
import (
"os/exec"
"bytes"
)
func pipeline(cmds ...*exec.Cmd) (err error) {
for i, cmd := range cmds[:len(cmds)-1] {
cmds[i+1].Stdin, err = cmd.StdoutPipe()
if err != nil {
return
}
}
stderr := make([]bytes.Buffer, len(cmds))
for i, cmd := range cmds {
cmd.Stderr = &stderr[i]
if err = cmd.Start(); err != nil {
break
}
}
for i, cmd := range cmds {
if cmd.Process == nil {
continue
}
if _err := cmd.Wait(); _err != nil {
if ee, ok := _err.(*exec.ExitError); ok {
ee.Stderr = stderr[i].Bytes()
}
if err != nil {
err = _err
}
}
}
return
}
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