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| // It is expected that, when .add() returns false, the consumer
// of the DirWriter will pause until a "drain" event occurs. Note
// that this is *almost always going to be the case*, unless the
// thing being written is some sort of unsupported type, and thus
// skipped over.
module.exports = DirWriter
var Writer = require('./writer.js')
var inherits = require('inherits')
var mkdir = require('mkdirp')
var path = require('path')
var collect = require('./collect.js')
inherits(DirWriter, Writer)
function DirWriter (props) {
var self = this
if (!(self instanceof DirWriter)) {
self.error('DirWriter must be called as constructor.', null, true)
}
// should already be established as a Directory type
if (props.type !== 'Directory' || !props.Directory) {
self.error('Non-directory type ' + props.type + ' ' +
JSON.stringify(props), null, true)
}
Writer.call(this, props)
}
DirWriter.prototype._create = function () {
var self = this
mkdir(self._path, Writer.dirmode, function (er) {
if (er) return self.error(er)
// ready to start getting entries!
self.ready = true
self.emit('ready')
self._process()
})
}
// a DirWriter has an add(entry) method, but its .write() doesn't
// do anything. Why a no-op rather than a throw? Because this
// leaves open the door for writing directory metadata for
// gnu/solaris style dumpdirs.
DirWriter.prototype.write = function () {
return true
}
DirWriter.prototype.end = function () {
this._ended = true
this._process()
}
DirWriter.prototype.add = function (entry) {
var self = this
// console.error('\tadd', entry._path, '->', self._path)
collect(entry)
if (!self.ready || self._currentEntry) {
self._buffer.push(entry)
return false
}
// create a new writer, and pipe the incoming entry into it.
if (self._ended) {
return self.error('add after end')
}
self._buffer.push(entry)
self._process()
return this._buffer.length === 0
}
DirWriter.prototype._process = function () {
var self = this
// console.error('DW Process p=%j', self._processing, self.basename)
if (self._processing) return
var entry = self._buffer.shift()
if (!entry) {
// console.error("DW Drain")
self.emit('drain')
if (self._ended) self._finish()
return
}
self._processing = true
// console.error("DW Entry", entry._path)
self.emit('entry', entry)
// ok, add this entry
//
// don't allow recursive copying
var p = entry
var pp
do {
pp = p._path || p.path
if (pp === self.root._path || pp === self._path ||
(pp && pp.indexOf(self._path) === 0)) {
// console.error('DW Exit (recursive)', entry.basename, self._path)
self._processing = false
if (entry._collected) entry.pipe()
return self._process()
}
p = p.parent
} while (p)
// console.error("DW not recursive")
// chop off the entry's root dir, replace with ours
var props = {
parent: self,
root: self.root || self,
type: entry.type,
depth: self.depth + 1
}
pp = entry._path || entry.path || entry.props.path
if (entry.parent) {
pp = pp.substr(entry.parent._path.length + 1)
}
// get rid of any ../../ shenanigans
props.path = path.join(self.path, path.join('/', pp))
// if i have a filter, the child should inherit it.
props.filter = self.filter
// all the rest of the stuff, copy over from the source.
Object.keys(entry.props).forEach(function (k) {
if (!props.hasOwnProperty(k)) {
props[k] = entry.props[k]
}
})
// not sure at this point what kind of writer this is.
var child = self._currentChild = new Writer(props)
child.on('ready', function () {
// console.error("DW Child Ready", child.type, child._path)
// console.error(" resuming", entry._path)
entry.pipe(child)
entry.resume()
})
// XXX Make this work in node.
// Long filenames should not break stuff.
child.on('error', function (er) {
if (child._swallowErrors) {
self.warn(er)
child.emit('end')
child.emit('close')
} else {
self.emit('error', er)
}
})
// we fire _end internally *after* end, so that we don't move on
// until any "end" listeners have had their chance to do stuff.
child.on('close', onend)
var ended = false
function onend () {
if (ended) return
ended = true
// console.error("* DW Child end", child.basename)
self._currentChild = null
self._processing = false
self._process()
}
}
|