func StartLeaf(leaf string) *Leaf {
if entry, ok := GetLeaf(leaf); ok {
return entry
}
secret := common.GenerateSecret()
log.Printf("Starting %s under port %d", leaf, port)
command := fmt.Sprintf("%s -- --mode leaf --port %d --secret %s 2>&1", headPath, port, secret)
prefix := []byte(fmt.Sprintf("[%s] ", leaf))
output := text.NewIndentWriter(os.Stdout, prefix)
entry := &Leaf{
State: "launching",
Secret: secret,
Anchor: exec.Command("enter-chroot", "-n", leaf, "sh", "-c", command),
}
entry.Anchor.Stdout = output
entry.Anchor.Start()
go func() {
err := entry.Anchor.Wait()
log.Printf("Leaf %s exited with %+v", leaf, err)
if err != nil {
entry.State = "crashed"
} else {
entry.State = "stopped"
}
}()
Leaves[leaf] = entry
return entry
}
func (p *printer) indent() *printer {
q := *p
q.tw = tabwriter.NewWriter(p.Writer, 4, 4, 1, ' ', 0)
q.Writer = text.NewIndentWriter(q.tw, []byte{'\t'})
return &q
}