/*	pull a zx replica*/package main import (	"clive/cmd"	"clive/cmd/opt"	"clive/zx/repl"	"io/ioutil"	"os"	"strings") func pull1(name string) error {	if !strings.ContainsRune(name, '/') {		name = "/u/lib/repl/" + name	}	tr, err := repl.Load(name)	if err != nil {		cmd.Warn("load %s: %s", name, err)		return err	}	defer tr.Close()	c := cmd.AppCtx()	if c.Debug {		tr.Ldb.DumpTo(os.Stderr)		tr.Rdb.DumpTo(os.Stderr)	}	if nflag {		var cc <-chan repl.Chg		switch {		case aflag:			cc, err = tr.AllPullChanges()		default:			cc, err = tr.PullChanges()		}		if err != nil {			cmd.Warn("pull changes %s: %s", name, err)			return err		}		for c := range cc {			cmd.Printf("%s\n", c)		}		return nil	}	var cc chan repl.Chg	dc := make(chan bool)	if c.Verb {		cc = make(chan repl.Chg)		go func() {			for c := range cc {				cmd.Printf("%s\n", c)			}			close(dc)		}()	} else {		close(dc)	}	switch {	case aflag:		err = tr.PullAll(cc)	case bflag:		err = tr.BlindPull(cc)	default:		err = tr.Pull(cc)	}	<-dc	if err != nil {		cmd.Warn("pull %s: %s", name, err)	}	if err2 := tr.Save(name); err2 != nil {		cmd.Warn("save %s: %s", name, err2)		if err == nil {			err = err2		}	}	return err} func names() []string {	ds, err := ioutil.ReadDir("/u/lib/repl")	if err != nil {		cmd.Warn("/u/lib/repl: %s", err)		return nil	}	nms := []string{}	for _, d := range ds {		if nm := d.Name(); strings.HasSuffix(nm, ".ldb") {			nm = nm[:len(nm)-4]			nms = append(nms, nm)		}	}	return nms} var (	opts                       = opt.New("file")	notux, aflag, bflag, nflag bool) func main() {	cmd.UnixIO("err")	c := cmd.AppCtx()	opts.NewFlag("D", "debug", &c.Debug)	opts.NewFlag("v", "verbose", &c.Verb)	opts.NewFlag("a", "all", &aflag)	opts.NewFlag("b", "blind", &bflag)	opts.NewFlag("n", "dry run", &nflag)	opts.NewFlag("u", "don't use unix out", &notux)	args := opts.Parse()	if !notux {		cmd.UnixIO("out")	}	if aflag && bflag {		opts.Usage()	}	var err error	switch len(args) {	case 0:		for _, nm := range names() {			cmd.Printf("pull %s...\n", nm)			if err2 := pull1(nm); err == nil {				err = err2			}		}	case 1:		err = pull1(args[0])	default:		opts.Usage()	}	cmd.Exit(err)}