func inconsistent(from, to string) bool {
if from == to {
return false
}
// moves from inside to?
// i.e. is from a prefix of to
return zx.HasPrefix(to, from)
}
// Return the best lfs added for the given path, its root, and the relative path for path
// Returns nil if there's no such tree
func Lfs(path string) (zx.Fs, string, string) {
lfslk.Lock()
defer lfslk.Unlock()
var bp, rel, root string
path = fpath.Clean(path)
for p, _ := range lfs {
if len(p) > len(bp) && zx.HasPrefix(path, p) {
bp = p
rel = zx.Suffix(path, p)
root = p
}
}
return lfs[bp], root, rel
}
// Add to pred to exclude suffixes of name from find.
func (ns *NS) exclSuffixes(name string, fpred *pred.Pred) *pred.Pred {
var xpreds []*pred.Pred
for _, p := range ns.pref {
if p.name != name && zx.HasPrefix(p.name, name) {
x, _ := pred.New(fmt.Sprintf("path=%q", p.name))
xpreds = append(xpreds, x)
}
}
if len(xpreds) > 0 {
xpred := xpreds[0]
if len(xpreds) > 1 {
xpred = pred.Or(xpreds...)
}
prune, _ := pred.New("prune")
if fpred == nil {
fpred, _ = pred.New("true")
}
fpred = pred.Or(pred.And(xpred, prune), fpred)
}
return fpred
}
// Resolve a name and return the prefix path, the array of mount points for it and the server paths
// for each mount point.
// The path must be absolute.
func (ns *Tree) Resolve(name string) (pref string, mnts []zx.Dir, spaths []string, err error) {
path, err := zx.AbsPath(name)
if err != nil {
return "", nil, nil, err
}
ns.dprintf("resolve %s\n", path)
ns.lk.RLock()
defer ns.lk.RUnlock()
var p *prefix
for _, np := range ns.pref {
if zx.HasPrefix(path, np.name) {
ns.dprintf("\thasprefix %s %s\n", path, np.name)
p = np
}
}
if p == nil {
ns.dprintf("\tno prefixes\n")
return "", nil, nil, dbg.ErrNotExist
}
suff := zx.Suffix(path, p.name)
mnts = make([]zx.Dir, 0, len(p.mnt))
spaths = []string{}
for _, d := range p.mnt {
if isfinder(d) || suff=="" || suff=="/" {
mnts = append(mnts, d.Dup())
spath := zx.Path(suff, d["spath"])
spaths = append(spaths, spath)
ns.dprintf("\ts='%s' d=%s\n", spath, d)
} else {
ns.dprintf("\tskip %s\n", d)
}
}
if len(mnts) == 0 {
ns.dprintf("\tno prefixes left\n")
return "", nil, nil, dbg.ErrNotExist
}
return p.name, mnts, spaths, nil
}
func find(dump, dpref, rel string, dc chan<- zx.Dir, ufile zx.Dir) {
droot := fpath.Join(dump, dpref)
years, err := cmd.GetDir(droot)
if err != nil {
cmd.Warn("%s", err)
return
}
for i := len(years) - 1; i >= 0; i-- {
year := years[i]["name"]
if ignored(year, "") {
continue
}
ypath := years[i]["path"]
days, err := cmd.GetDir(ypath)
if err != nil {
cmd.Warn("%s: %s", ypath, err)
continue
}
lastsz, lastmt, lastm := "", "", ""
for j := len(days) - 1; j >= 0; j-- {
day := days[j]["name"]
if ignored(year, day) {
continue
}
fpath := fpath.Join(days[j]["path"], rel)
d, err := cmd.Stat(fpath)
if err != nil {
if !force {
cmd.Dprintf("find: %s", err)
return
}
continue
}
newm, newsz, newmt := d["mode"], d["size"], d["mtime"]
if newsz == lastsz && newmt == lastmt && newm == lastm {
continue
}
lastm, lastsz, lastmt = newm, newsz, newmt
d["upath"] = ufile["path"]
d["uupath"] = ufile["upath"]
if ok := dc <- d; !ok {
return
}
if !all {
return
}
}
}
}
func report(dc chan zx.Dir, donec chan bool) {
last := ""
for d := range dc {
if last == "" {
last = d["Upath"]
if last == "" {
last = d["path"]
}
}
p := d["path"]
cmd.Dprintf("found '%s'\n", p)
var err error
switch {
case xcmd != "":
_, err = cmd.Printf("%s %s %s\n", xcmd, p, last)
case dflag:
dcmd := fmt.Sprintf(`9 diff -n %s %s`, p, last)
_, err = cmd.Printf("%s\n", dcmd)
if err != nil {
cmd.Warn("diff: %s", err)
continue
}
case lflag:
_, err = cmd.Printf("%s\n", d.Fmt())
case cflag:
_, err = cmd.Printf("cp %s %s\n", p, d["Upath"])
default:
_, err = cmd.Printf("%s\n", d["path"])
}
if err != nil {
close(dc, err)
}
last = p
}
close(donec, cerror(dc))
}
func hist(in <-chan face{}) error {
dc := make(chan zx.Dir)
ec := make(chan bool)
go report(dc, ec)
var sts error
for m := range in {
switch m := m.(type) {
case zx.Dir:
cmd.Dprintf("got %T %s\n", m, m["path"])
file := m["path"]
if m["upath"] == "" {
m["upath"] = m["path"]
}
ddir := dump
dpref := ""
rel := ""
switch {
case zx.HasPrefix(file, "/zx"):
if ddir == "" {
ddir = "/dump"
}
dpref = "/zx"
rel = zx.Suffix(file, "/zx")
case zx.HasPrefix(file, "/u/gosrc/src/clive"):
if ddir == "" {
ddir = "/u/dump"
}
dpref = "clive"
rel = zx.Suffix(file, "/u/gosrc/src/clive")
case zx.HasPrefix(file, "/u"):
if ddir == "" {
ddir = "/u/dump"
}
els := zx.Elems(file)
if len(els) < 3 {
cmd.Warn("%s: too few path elements", m["upath"])
sts = errNoDump
continue
}
dpref = els[1]
rel = zx.Path(els[2:]...)
default:
cmd.Warn("%s: %s", m["upath"], errNoDump)
sts = errNoDump
continue
}
find(ddir, dpref, rel, dc, m.Dup())
default:
cmd.Dprintf("got %T\n", m)
}
}
close(dc, cerror(in))
<-ec
if sts == nil {
sts = cerror(ec)
}
if sts == nil {
sts = cerror(in)
}
return sts
}
// Run cnt in the current app context.
func main() {
c := cmd.AppCtx()
cmd.UnixIO("err")
opts.NewFlag("D", "debug", &c.Debug)
opts.NewFlag("f", "force search past file removals", &force)
opts.NewFlag("l", "produce a long listing (or print just the name)", &lflag)
opts.NewFlag("c", "copy the file from the dump", &cflag)
opts.NewFlag("d", "print file differences", &dflag)
opts.NewFlag("x", "cmd: print lines to execute this command between versions", &xcmd)
opts.NewFlag("a", "list all copies that differ, not just the last one.", &all)
opts.NewFlag("p", "dumpdir: path to dump (default is /dump or /u/dump)", &dump)
t := time.Now()
when := t
opts.NewFlag("w", "date: backward search start time (default is now)", &when)
ux := false
opts.NewFlag("u", "unix IO", &ux)
args := opts.Parse()
if (all && cflag) || (force && !all) {
cmd.Warn("incompatible flags")
opts.Usage()
}
if ux {
cmd.UnixIO("out")
}
lastyear = ""
lastday = ""
if !t.Equal(when) {
y := when.Year()
m := when.Month()
d := when.Day()
if y == 0 {
y = t.Year()
}
lastyear = fmt.Sprintf("%04d", y)
lastday = fmt.Sprintf("%02d%02d", m, d)
}
if len(args) != 0 {
cmd.SetIn("in", cmd.Dirs(args...))
}
in := cmd.In("in")
if err := hist(in); err != nil {
cmd.Fatal(err)
}
}
// Run rem in the current app context.
func main() {
c := cmd.AppCtx()
cmd.UnixIO("err")
opts.NewFlag("D", "debug", &c.Debug)
opts.NewFlag("v", "verbose; print the calls made in the order they are made.", &c.Verb)
opts.NewFlag("a", "remove all", &aflag)
opts.NewFlag("f", "quiet, called 'force' in unix", &fflag)
opts.NewFlag("n", "dry run; report removes but do not do them", &dry)
args := opts.Parse()
if len(args) != 0 {
cmd.SetIn("in", cmd.Dirs(args...))
}
c.Verb = c.Verb || dry
in := cmd.In("in")
var err error
for m := range in {
switch d := m.(type) {
case zx.Dir:
cmd.Dprintf("got %T %s\n", d, d["upath"])
dirs = append(dirs, d)
case error:
cmd.Warn("%s", d)
default:
// ignored
cmd.Dprintf("ignored %T\n", m)
}
}
if aflag {
for i := 0; i < len(dirs); i++ {
if dirs[i] == nil {
continue
}
pi := dirs[i]["path"]
for j := 1; j < len(dirs); j++ {
if i == j || dirs[j] == nil {
continue
}
pj := dirs[j]["path"]
if zx.HasPrefix(pj, pi) {
dirs[j] = nil
}
}
}
}
for i := len(dirs) - 1; i >= 0; i-- {
if dirs[i] == nil {
continue
}
if cerr := rmf(dirs[i]); cerr != nil {
if !fflag {
cmd.Warn("%s", cerr)
err = cerr
}
}
}
if err == nil {
err = cerror(in)
if err != nil {
cmd.Fatal(err)
}
}
cmd.Exit(err)
}