index.js
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var EventEmitter = require('events').EventEmitter;
var rfs = require('fs');
var path = require('path');
module.exports = function walk (dir, opts, emitter, dstat) {
if (!opts) opts = {};
var fdir = opts._original || dir;
opts._original = undefined;
var fs = opts.fs || rfs;
if (!emitter) {
emitter = new EventEmitter;
emitter.stop = function () {
emitter._stopped = true;
emitter.emit('stop');
};
emitter._pending = 0;
emitter._seen = {};
}
if (dstat) {
var stopped = false;
emitter.emit('directory', fdir, dstat, function stop () {
stopped = true;
});
emitter.emit('path', fdir, dstat);
if (!stopped) {
emitter._pending ++;
fs.readdir(dir, function (err, files) {
emitter._pending --;
onreaddir(dir, err, files);
});
}
else check()
}
else {
emitter._pending ++;
fs.lstat(dir, function (err, stat) {
emitter._pending --;
onlstat(err, stat);
});
}
function onlstat (err, stat) {
if (emitter._stopped) return;
if (err) {
if (!err.path) err.path = dir;
emitter.emit('error', err);
return check();
}
emitter._seen[stat.ino || dir] = true;
if (stat.isSymbolicLink() && opts.followSymlinks) {
emitter.emit('link', fdir, stat);
emitter._pending ++;
fs.readlink(dir, function (err, rfile) {
if (emitter._stopped) return;
emitter._pending --;
if (err) {
if (!err.path) err.path = dir;
emitter.emit('error', err);
return check();
}
var file_ = path.resolve(dir, rfile);
emitter.emit('readlink', fdir, file_);
emitter._pending ++;
fs.lstat(file_, function (err, stat) {
emitter._pending --;
onstat(err, stat);
});
});
}
else if (stat.isSymbolicLink()) {
emitter.emit('link', fdir, stat);
emitter.emit('path', fdir, stat);
check();
}
else if (stat.isDirectory()) {
var stopped = false;
emitter.emit('directory', fdir, stat, function stop () {
stopped = true;
});
emitter.emit('path', fdir, stat);
if (!stopped) {
emitter._pending ++;
fs.readdir(dir, function (err, files) {
emitter._pending --;
onreaddir(dir, err, files);
});
}
else check()
}
else {
emitter.emit('file', fdir, stat);
emitter.emit('path', fdir, stat);
check();
}
}
return emitter;
function check () {
if (emitter._pending === 0) finish();
}
function finish () {
emitter.emit('end');
emitter._stopped = true;
}
function onreaddir (dir, err, files) {
if (emitter._stopped) return;
if (err) {
if (!err.path) err.path = dir;
emitter.emit('error', err);
return check();
}
files.forEach(function (rfile) {
var file = path.join(fdir, rfile);
emitter._pending ++;
fs.lstat(file, function (err, stat) {
emitter._pending --;
if (emitter._stopped) return;
if (err) {
if (!err.path) err.path = file;
emitter.emit('error', err);
check()
}
else onstat(file, stat)
});
});
check();
}
function onstat (file, stat, original) {
if (emitter._seen[stat.ino || file]) return check();
emitter._seen[stat.ino || file] = true;
if (stat.isDirectory()) {
if (original) opts._original = original;
walk(file, opts, emitter, stat);
check();
}
else if (stat.isSymbolicLink() && opts.followSymlinks) {
emitter.emit('link', file, stat);
fs.readlink(file, function (err, rfile) {
if (emitter._stopped) return;
if (err) {
if (!err.path) err.path = file;
emitter.emit('error', err);
return check();
}
var file_ = path.resolve(path.dirname(file), rfile);
emitter.emit('readlink', file, file_);
emitter._pending ++;
fs.lstat(file_, function (err, stat_) {
emitter._pending --;
if (emitter._stopped) return;
if (err) {
if (!err.path) err.path = file_;
emitter.emit('error', err);
return check();
}
onstat(file_, stat_, file);
check();
});
});
}
else if (stat.isSymbolicLink()) {
emitter.emit('link', file, stat);
emitter.emit('path', file, stat);
check();
}
else {
emitter.emit('file', file, stat);
emitter.emit('path', file, stat);
check();
}
}
};