Method apply

src/pkg/store/node.go:121–169

(seqn int64, mut string)

}

func (n node) apply(seqn int64, mut string) (rep node, ev Event) {
	ev.Seqn, ev.Rev, ev.Mut = seqn, seqn, mut
	if mut == Nop {
		ev.Path = "/"
		ev.Rev = nop
		rep = n
		ev.Getter = rep
		return
	}

	var rev int64
	var keep bool
	ev.Path, ev.Body, rev, keep, ev.Err = decode(mut)

	if ev.Err == nil && keep {
		components := split(ev.Path)
		for i := 0; i < len(components)-1; i++ {
			_, dirRev := n.get(components[0 : i+1])
			if dirRev == Missing {
				break
			}
			if dirRev != Dir {
				ev.Err = os.ENOTDIR
				break
			}
		}
	}

	if ev.Err == nil {
		_, curRev := n.Get(ev.Path)
		if rev != Clobber && rev < curRev {
			ev.Err = ErrRevMismatch
		} else if curRev == Dir {
			ev.Err = os.EISDIR
		}
	}

	if ev.Err != nil {
		ev.Path, ev.Body, rev, keep = ErrorPath, ev.Err.String(), Clobber, true
	}

	if !keep {
		ev.Rev = Missing
	}

	rep = n.setp(ev.Path, ev.Body, ev.Rev, keep)
	ev.Getter = rep
	return
}