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node_modules
walk-test

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{ "node": true
, "browser": true
, "jquery": true
, "onevar": true
, "laxcomma": true
, "laxbreak": true
, "eqeqeq": true
, "immed": true
, "undef": true
, "unused": true
, "latedef": true
}

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LICENSE
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Copyright 2011 AJ ONeal
This is open source software; you can redistribute it and/or modify it under the
terms of either:
a) the "MIT License"
b) the "Apache-2.0 License"
MIT License
Permission is hereby granted, free of charge, to any person obtaining a copy
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See the License for the specific language governing permissions and
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LICENSE.APACHE2 Normal file
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MIT LICENSE
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315
README.md
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# 2021 Update node-walk
====
Consider using [`@root/walk`](https://npmjs.org/package/@root/walk) instead.
I created `walk` quite literally a decade ago, in the Node v0.x days.
Back then using an EventEmitter seemed like the thing to do. Nowadays,
it seems a bit overkill for the simple task of walking over directories.
There's nothing wrong with `walk` - it's about the same as it was 10 years ago -
however, at only 50 lines of code long, `@root/walk` is much simpler and much faster.
# node-walk
| a [Root](https://rootprojects.org) project
nodejs walk implementation. nodejs walk implementation.
This is somewhat of a port python's `os.walk`, but using Node.JS conventions. This is somewhat of a port python's `os.walk`, but using Node.JS conventions.
- EventEmitter * EventEmitter
- Asynchronous * Asynchronous
- Chronological (optionally) * Chronological (optionally)
- Built-in flow-control * Built-in flow-control
- includes Synchronous version (same API as Asynchronous) * includes Synchronous version (same API as Asynchronous)
As few file descriptors are opened at a time as possible. As few file descriptors are opened at a time as possible.
This is particularly well suited for single hard disks which are not flash or solid state. This is particularly well suited for single hard disks which are not flash or solid state.
## Installation Installation
----
```bash npm install walk
npm install --save walk
```
# Getting Started Usage
====
```javascript
'use strict';
var walk = require('walk');
var fs = require('fs');
var walker;
var options = {};
walker = walk.walk('/tmp', options);
walker.on('file', function (root, fileStats, next) {
fs.readFile(fileStats.name, function () {
// doStuff
next();
});
});
walker.on('errors', function (root, nodeStatsArray, next) {
next();
});
walker.on('end', function () {
console.log('all done');
});
```
## Common Events
All single event callbacks are in the form of `function (root, stat, next) {}`.
All multiple event callbacks callbacks are in the form of `function (root, stats, next) {}`, except **names** which is an array of strings.
All **error** event callbacks are in the form `function (root, stat/stats, next) {}`.
**`stat.error`** contains the error.
- `names`
- `directory`
- `directories`
- `file`
- `files`
- `end`
- `nodeError` (`stat` failed)
- `directoryError` (`stat` succedded, but `readdir` failed)
- `errors` (a collection of any errors encountered)
A typical `stat` event looks like this:
```javascript
{ dev: 16777223,
mode: 33188,
nlink: 1,
uid: 501,
gid: 20,
rdev: 0,
blksize: 4096,
ino: 49868100,
size: 5617,
blocks: 16,
atime: Mon Jan 05 2015 18:18:10 GMT-0700 (MST),
mtime: Thu Sep 25 2014 21:21:28 GMT-0600 (MDT),
ctime: Thu Sep 25 2014 21:21:28 GMT-0600 (MDT),
birthtime: Thu Sep 25 2014 21:21:28 GMT-0600 (MDT),
name: 'README.md',
type: 'file' }
```
# Advanced Example
Both Asynchronous and Synchronous versions are provided. Both Asynchronous and Synchronous versions are provided.
```javascript The Synchronous version still uses callbacks, so it is safe to use with other Asynchronous functions and will still work as expected.
'use strict';
var walk = require('walk'); var walk = require('walk'),
var fs = require('fs'); fs = require('fs'),
var options; options,
var walker; walker;
options = { options = {
followLinks: false, followLinks: false,
// directories with these keys will be skipped };
filters: ['Temp', '_Temp'],
};
walker = walk.walk('/tmp', options); walker = walk.walk("/tmp", options);
// OR // OR
// walker = walk.walkSync("/tmp", options); // walker = walk.walkSync("/tmp", options);
walker.on('names', function (root, nodeNamesArray) { walker.on("names", function (root, nodeNamesArray) {
nodeNamesArray.sort(function (a, b) { nodeNames.sort(function (a, b) {
if (a > b) return 1; if (a > b) return 1;
if (a < b) return -1; if (a < b) return -1;
return 0; return 0;
}); });
}); });
walker.on('directories', function (root, dirStatsArray, next) { walker.on("directories", function (root, dirStatsArray, next) {
// dirStatsArray is an array of `stat` objects with the additional attributes // dirStatsArray is an array of `stat` objects with the additional attributes
// * type // * type
// * error // * error
// * name // * name
next(); next();
}); });
walker.on('file', function (root, fileStats, next) {
fs.readFile(fileStats.name, function () {
// doStuff
next();
});
});
walker.on('errors', function (root, nodeStatsArray, next) {
next();
});
walker.on('end', function () {
console.log('all done');
});
```
### Sync
Note: You **can't use EventEmitter** if you want truly synchronous walker
(although it's synchronous under the hood, it appears not to be due to the use of `process.nextTick()`).
Instead **you must use `options.listeners`** for truly synchronous walker.
Although the sync version uses all of the `fs.readSync`, `fs.readdirSync`, and other sync methods,
I don't think I can prevent the `process.nextTick()` that `EventEmitter` calls.
```javascript
(function () {
'use strict';
var walk = require('walk');
var fs = require('fs');
var options;
var walker;
// To be truly synchronous in the emitter and maintain a compatible api,
// the listeners must be listed before the object is created
options = {
listeners: {
names: function (root, nodeNamesArray) {
nodeNamesArray.sort(function (a, b) {
if (a > b) return 1;
if (a < b) return -1;
return 0;
});
},
directories: function (root, dirStatsArray, next) {
// dirStatsArray is an array of `stat` objects with the additional attributes
// * type
// * error
// * name
walker.on("file", function (root, fileStats, next) {
fs.readFile(fileStats.name, function () {
// doStuff
next(); next();
}, });
file: function (root, fileStats, next) { });
fs.readFile(fileStats.name, function () {
// doStuff
next();
});
},
errors: function (root, nodeStatsArray, next) {
next();
},
},
};
walker = walk.walkSync('/tmp', options); walker.on("errors", function (root, nodeStatsArray, next) {
next();
});
console.log('all done'); walker.on("end", function () {
})(); console.log("all done");
``` });
# API API
====
Emitted Values Emitted Values
- `on('XYZ', function(root, stats, next) {})` * `on('XYZ', function(root, stats, next) {})`
- `root` - the containing the files to be inspected * `root` - the containing the files to be inspected
- _stats[Array]_ - a single `stats` object or an array with some added attributes * *stats[Array]* - a single `stats` object or an array with some added attributes
- type - 'file', 'directory', etc * type - 'file', 'directory', etc
- error * error
- name - the name of the file, dir, etc * name - the name of the file, dir, etc
- next - no more files will be read until this is called * next - no more files will be read until this is called
Single Events - fired immediately Single Events - fired immediately
- `end` - No files, dirs, etc left to inspect * `end` - No files, dirs, etc left to inspect
- `directoryError` - Error when `fstat` succeeded, but reading path failed (Probably due to permissions). * `directoryError` - Error when `fstat` succeeded, but reading path failed (Probably due to permissions).
- `nodeError` - Error `fstat` did not succeeded. * `nodeError` - Error `fstat` did not succeeded.
- `node` - a `stats` object for a node of any type * `node` - a `stats` object for a node of any type
- `file` - includes links when `followLinks` is `true` * `file` - includes links when `followLinks` is `true`
- `directory` - **NOTE** you could get a recursive loop if `followLinks` and a directory links to its parent * Note: This feature is broken in the current version, but works in the previous `walk-recursive` version
- `symbolicLink` - always empty when `followLinks` is `true` * `directory`
- `blockDevice` * `symbolicLink` - always empty when `followLinks` is `true`
- `characterDevice` * `blockDevice`
- `FIFO` * `characterDevice`
- `socket` * `FIFO`
* `socket`
Events with Array Arguments - fired after all files in the dir have been `stat`ed Events with Array Arguments - fired after all files in the dir have been `stat`ed
- `names` - before any `stat` takes place. Useful for sorting and filtering. * `names` - before any `stat` takes place. Useful for sorting and filtering.
* Note: the array is an array of `string`s, not `stat` objects
* Note: the `next` argument is a `noop`
- Note: the array is an array of `string`s, not `stat` objects * `errors` - errors encountered by `fs.stat` when reading ndes in a directory
- Note: the `next` argument is a `noop` * `nodes` - an array of `stats` of any type
* `files`
- `errors` - errors encountered by `fs.stat` when reading ndes in a directory * `directories` - modification of this array - sorting, removing, etc - affects traversal
- `nodes` - an array of `stats` of any type * `symbolicLinks`
- `files` * `blockDevices`
- `directories` - modification of this array - sorting, removing, etc - affects traversal * `characterDevices`
- `symbolicLinks` * `FIFOs`
- `blockDevices` * `sockets`
- `characterDevices`
- `FIFOs`
- `sockets`
**Warning** beware of infinite loops when `followLinks` is true (using `walk-recurse` varient). **Warning** beware of infinite loops when `followLinks` is true (using `walk-recurse` varient).
# Comparisons Comparisons
====
Tested on my `/System` containing 59,490 (+ self) directories (and lots of files). Tested on my `/System` containing 59,490 (+ self) directories (and lots of files).
The size of the text output was 6mb. The size of the text output was 6mb.
`find`: `find`:
time bash -c "find /System -type d | wc" time bash -c "find /System -type d | wc"
59491 97935 6262916 59491 97935 6262916
real 2m27.114s real 2m27.114s
user 0m1.193s user 0m1.193s
@ -296,11 +158,12 @@ Note that `find.js` omits the start directory
In conclusion node.js asynchronous walk is much slower than regular "find". In conclusion node.js asynchronous walk is much slower than regular "find".
# LICENSE LICENSE
===
`node-walk` is available under the following licenses: `node-walk` is available under the following licenses:
- MIT * MIT
- Apache 2 * Apache 2
Copyright 2011 - Present AJ ONeal Copyright 2011 - Present AJ ONeal

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@ -47,10 +47,7 @@
function emitSingleEvents(emitter, path, stats, next, self) { function emitSingleEvents(emitter, path, stats, next, self) {
var num = 1 + emitter.listeners(stats.type).length + emitter.listeners("node").length; var num = 1 + emitter.listeners(stats.type).length + emitter.listeners("node").length;
function nextWhenReady(flag) { function nextWhenReady() {
if (flag) {
stats.flag = flag;
}
num -= 1; num -= 1;
if (0 === num) { next.call(self); } if (0 === num) { next.call(self); }
} }

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lib/package.json Normal file
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@ -0,0 +1,24 @@
{
"name" : "walk",
"description" : "A node port of python's os.walk",
"url" : "github.com/coolaj86/node-walk",
"keywords" : ["util", "os", "sys", "fs", "walk", "walkSync"],
"author" : "AJ ONeal <coolaj86@gmail.com>",
"contributors" : [],
"dependencies" : {
"forEachAsync": ">= 2.1.0"
},
"lib" : ".",
"main" : "./walk.js",
"version" : "2.1.1",
"licenses": [
{
"type": "MIT",
"url": "http://www.opensource.org/licenses/mit-license.php"
},
{
"type": "Apache2",
"url": "http://opensource.org/licenses/apache2.0.php"
}
]
}

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@ -7,7 +7,6 @@
function noop() {} function noop() {}
var fs = require('fs'), var fs = require('fs'),
path = require('path'),
EventEmitter = require('events').EventEmitter, EventEmitter = require('events').EventEmitter,
TypeEmitter = require('./node-type-emitter'); TypeEmitter = require('./node-type-emitter');
@ -36,7 +35,7 @@
emitter.emit('names', curpath, files, noop); emitter.emit('names', curpath, files, noop);
files.forEachAsync(function (cont, file) { files.forEachAsync(function (cont, file) {
emitter.emit('name', curpath, file, noop); emitter.emit('name', curpath, file, noop);
fs.lstat(curpath + path.sep + file, function (err, stat) { fs.lstat(curpath + '/' + file, function (err, stat) {
stat = stat || {}; stat = stat || {};
stat.name = file; stat.name = file;
if (err) { if (err) {
@ -80,7 +79,7 @@
} }
function fullPath(v,i,o) { function fullPath(v,i,o) {
o[i]= [curpath, path.sep, v].join(''); o[i]= [curpath, '/', v].join('');
} }
curpath = pathname; curpath = pathname;

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@ -1,20 +1,22 @@
/*jshint strict:true node:true es5:true onevar:true laxcomma:true laxbreak:true*/
// Adapted from work by jorge@jorgechamorro.com on 2010-11-25 // Adapted from work by jorge@jorgechamorro.com on 2010-11-25
(function () { (function () {
"use strict"; "use strict";
// Array.prototype.forEachAsync(next, item, i, collection)
//require('Array.prototype.forEachAsync');
function noop() {} function noop() {}
var fs = require('fs') var fs = require('fs')
, forEachAsync = require('foreachasync').forEachAsync , forEachAsync = require('forEachAsync')
, EventEmitter = require('events').EventEmitter , EventEmitter = require('events').EventEmitter
, TypeEmitter = require('./node-type-emitter') , TypeEmitter = require('./node-type-emitter')
, util = require('util') , util = require('util')
, path = require('path')
; ;
function appendToDirs(stat) { function appendToDirs(stat) {
/*jshint validthis:true*/ /*jshint validthis:true*/
if(stat.flag && stat.flag === NO_DESCEND) { return; }
this.push(stat.name); this.push(stat.name);
} }
@ -29,40 +31,23 @@
var me = this var me = this
; ;
options = options || {}; me._wsync = true;
me._wStat = options.followLinks && 'stat' || 'lstat';
me._wStatSync = me._wStat + 'Sync';
me._wsync = sync;
me._wq = []; me._wq = [];
me._wqueue = [me._wq]; me._wqueue = [me._wq];
me._wcurpath = undefined; me._wcurpath = undefined;
me._wfilters = options.filters || []; me._wfistrun = true;
me._wfirstrun = true;
me._wcurpath = pathname; me._wcurpath = pathname;
if (me._wsync) { if (me._wsync) {
//console.log('_walkSync');
me._wWalk = me._wWalkSync; me._wWalk = me._wWalkSync;
} else { } else {
//console.log('_walkASync');
me._wWalk = me._wWalkAsync; me._wWalk = me._wWalkAsync;
} }
options.listeners = options.listeners || {}; // TODO just one little anony won't hurt...
Object.keys(options.listeners).forEach(function (event) { process.nextTick(function () {
var callbacks = options.listeners[event] me._wWalk();
;
if ('function' === typeof callbacks) {
callbacks = [callbacks];
}
callbacks.forEach(function (callback) {
me.on(event, callback);
});
}); });
me._wWalk();
} }
// Inherits must come before prototype additions // Inherits must come before prototype additions
@ -78,7 +63,6 @@
if (err) { if (err) {
stat.error = err; stat.error = err;
//me.emit('error', curpath, stat); //me.emit('error', curpath, stat);
// TODO v3.0 (don't noop the next if there are listeners)
me.emit('nodeError', me._wcurpath, stat, noop); me.emit('nodeError', me._wcurpath, stat, noop);
me._wfnodegroups.errors.push(stat); me._wfnodegroups.errors.push(stat);
me._wCurFileCallback(); me._wCurFileCallback();
@ -98,18 +82,18 @@
me._wCurFileCallback = cont; me._wCurFileCallback = cont;
me.emit('name', me._wcurpath, file, noop); me.emit('name', me._wcurpath, file, noop);
statPath = me._wcurpath + path.sep + file; statPath = me._wcurpath + '/' + file;
if (!me._wsync) { if (!me._wsync) {
// TODO how to remove this anony? // TODO how to remove this anony?
fs[me._wStat](statPath, function (err, stat) { fs.lstat(statPath, function (err, stat) {
me._wLstatHandler(err, stat); me._wLstatHandler(err, stat);
}); });
return; return;
} }
try { try {
me._wLstatHandler(null, fs[me._wStatSync](statPath)); me._wLstatHandler(null, fs.lstatSync(statPath));
} catch(e) { } catch(e) {
me._wLstatHandler(e); me._wLstatHandler(e);
} }
@ -129,8 +113,6 @@
; ;
if (me._wfnodegroups.errors.length) { if (me._wfnodegroups.errors.length) {
// TODO v3.0 (don't noop the next)
// .errors is an array of stats with { name: name, error: error }
me.emit('errors', me._wcurpath, me._wfnodegroups.errors, noop); me.emit('errors', me._wcurpath, me._wfnodegroups.errors, noop);
} }
// XXX emitNodeTypes still needs refactor // XXX emitNodeTypes still needs refactor
@ -158,73 +140,36 @@
Walker.prototype._wReaddirHandler = function (err, files) { Walker.prototype._wReaddirHandler = function (err, files) {
var fnodeGroups = TypeEmitter.createNodeGroups() var fnodeGroups = TypeEmitter.createNodeGroups()
, me = this , me = this
, parent
, child
; ;
me._wfnodegroups = fnodeGroups; me._wfnodegroups = fnodeGroups;
me._wcurfiles = files; me._wcurfiles = files;
// no error, great
if (!err) { if (!err) {
me._wReadFiles(); me._wReadFiles();
return; return;
} }
// TODO path.sep if (!me._wfistrun) {
me._wcurpath = me._wcurpath.replace(/\/$/, '');
// error? not first run? => directory error
if (!me._wfirstrun) {
// TODO v3.0 (don't noop the next if there are listeners)
me.emit('directoryError', me._wcurpath, { error: err }, noop); me.emit('directoryError', me._wcurpath, { error: err }, noop);
// TODO v3.0
//me.emit('directoryError', me._wcurpath.replace(/^(.*)\/.*$/, '$1'), { name: me._wcurpath.replace(/^.*\/(.*)/, '$1'), error: err }, noop);
me._wReadFiles(); me._wReadFiles();
return; return;
} }
// error? first run? => maybe a file, maybe a true error me._wfistrun = false;
me._wfirstrun = false; // TODO how to remove this anony?
fs.lstat(me._wcurpath, function (e, stat) {
// readdir failed (might be a file), try a stat on the parent
parent = me._wcurpath.replace(/^(.*)\/.*$/, '$1');
fs[me._wStat](parent, function (e, stat) {
if (stat) { if (stat) {
// success files = [me._wcurpath.replace(/.*\//, '')];
// now try stat on this as a child of the parent directory me._wcurpath = me._wcurpath.replace(files[0], '');
child = me._wcurpath.replace(/^.*\/(.*)$/, '$1');
me._wcurfiles = [child];
me._wcurpath = parent;
} else {
// TODO v3.0
//me.emit('directoryError', me._wcurpath.replace(/^(.*)\/.*$/, '$1'), { name: me._wcurpath.replace(/^.*\/(.*)/, '$1'), error: err }, noop);
// TODO v3.0 (don't noop the next)
// the original readdir error, not the parent stat error
me.emit('nodeError', me._wcurpath, { error: err }, noop);
} }
me._wReadFiles(); me._wReadFiles();
}); });
}; };
Walker.prototype._wFilter = function () {
var me = this
, exclude
;
// Stop directories that contain filter keywords
// from continuing through the walk process
exclude = me._wfilters.some(function (filter) {
if (me._wcurpath.match(filter)) {
return true;
}
});
return exclude;
};
Walker.prototype._wWalkSync = function () { Walker.prototype._wWalkSync = function () {
//console.log('walkSync');
var err var err
, files , files
, me = this , me = this
@ -239,7 +184,6 @@
me._wReaddirHandler(err, files); me._wReaddirHandler(err, files);
}; };
Walker.prototype._wWalkAsync = function () { Walker.prototype._wWalkAsync = function () {
//console.log('walkAsync');
var me = this var me = this
; ;
@ -257,32 +201,21 @@
} }
if (me._wq.length) { if (me._wq.length) {
me._wcurpath = me._wq.pop(); me._wcurpath = me._wq.pop();
while (me._wq.length && me._wFilter()) { me._wWalk();
me._wcurpath = me._wq.pop();
}
if (me._wcurpath && !me._wFilter()) {
me._wWalk();
} else {
me._wNext();
}
return; return;
} }
me._wqueue.length -= 1; me._wqueue.length -= 1;
if (me._wqueue.length) { if (me._wqueue.length) {
me._wq = me._wqueue[me._wqueue.length - 1]; me._wq = me._wqueue[me._wqueue.length - 1];
return me._wNext(); return this._wNext();
} }
me.emit('end');
// To not break compatibility
//process.nextTick(function () {
me.emit('end');
//});
}; };
Walker.prototype._wJoinPath = function (v, i, o) { Walker.prototype._wJoinPath = function (v, i, o) {
var me = this var me = this
; ;
o[i] = [me._wcurpath, path.sep, v].join(''); o[i] = [me._wcurpath, '/', v].join('');
}; };
Walker.prototype.pause = function () { Walker.prototype.pause = function () {
this._paused = true; this._paused = true;

View File

@ -1,40 +0,0 @@
{
"name": "walk",
"description": "A node port of python's os.walk",
"url": "http://git.coolaj86.com/coolaj86/fs-walk.js",
"keywords": [
"util",
"os",
"sys",
"fs",
"walk",
"walkSync"
],
"author": "AJ ONeal <coolaj86@gmail.com>",
"contributors": [],
"dependencies": {
"foreachasync": "^3.0.0"
},
"lib": ".",
"main": "./lib/walk.js",
"version": "2.3.15",
"files": [
"lib"
],
"repository": {
"url": "https://git.coolaj86.com/coolaj86/fs-walk.js.git"
},
"license": "(MIT OR Apache-2.0)",
"bugs": {
"url": "https://git.coolaj86.com/coolaj86/fs-walk.js/issues"
},
"homepage": "https://git.coolaj86.com/coolaj86/fs-walk.js",
"directories": {
"example": "examples",
"test": "test"
},
"devDependencies": {},
"scripts": {
"test": "./test/walk-test.sh"
}
}

15
test-walk.js Normal file
View File

@ -0,0 +1,15 @@
/*jshint strict:true node:true es5:true onevar:true laxcomma:true laxbreak:true*/
(function () {
"use strict";
var walk = require('./lib/walk').walk
, walker
;
walker = walk('./');
walker.on('file', function (root, stat, next) {
console.log(root, stat.name);
next();
});
}());

View File

@ -1,34 +0,0 @@
(function () {
"use strict";
var walk = require('../lib/walk').walk
, path = require('path')
, dirname = process.argv[2] || './'
, walker
;
walker = walk(dirname);
walker.on('directories', function (root, stats, next) {
stats.forEach(function (stat) {
console.log('[ds]', path.join(root, stat.name));
});
next();
});
/*
walker.on('directory', function (root, stat, next) {
console.log('[d]', path.join(root, stat.name));
next();
});
*/
walker.on('file', function (root, stat, next) {
console.log('[f]', path.join(root, stat.name));
next();
});
walker.on('end', function () {
console.log('All Done!');
});
}());

View File

@ -1,43 +0,0 @@
(function () {
"use strict";
var walk = require('../lib/walk')
, fs = require('fs')
, options
, walker
;
options = {
listeners: {
names: function (root, nodeNamesArray) {
nodeNamesArray.sort(function (a, b) {
if (a > b) return 1;
if (a < b) return -1;
return 0;
});
}
, directories: function (root, dirStatsArray, next) {
// dirStatsArray is an array of `stat` objects with the additional attributes
// * type
// * error
// * name
next();
}
, file: function (root, fileStats, next) {
fs.readFile(fileStats.name, function () {
// doStuff
console.log(root, fileStats.name);
next();
});
}
, errors: function (root, nodeStatsArray, next) {
next();
}
}
};
walker = walk.walkSync("/tmp", options);
console.log("all done");
}());

40
testSync.js Normal file
View File

@ -0,0 +1,40 @@
(function () {
"use strict";
var walk = require('./lib/walk')
, _ = require('underscore')
, fs = require('fs')
, sync = false
, walker;
console.log(walk);
walker = walk.walk(".");
walker.on("directory", function (root, dirStatsArray, next) {
// dirStatsArray is an array of `stat` objects with the additional attributes
// * type
// * error
// * name
//console.log(_.pluck(dirStatsArray, 'name'));
console.log(root + '/' + dirStatsArray.name);
next();
});
walker.on("file", function (root, fileStats, next) {
console.log(root + '/' + fileStats.name);
next();
});
walker.on("errors", function (root, nodeStatsArray, next) {
//console.log(nodeStatsArray);
next();
});
walker.on("end", function () {
console.log("all done");
});
}());