fs-extender
v1.0.3
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Extras suite for node fs module
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FS-EXTENDER
Extender module for node filesystem
Description
The intention of this module is to provide many functions that don't yet exist in node fs
module, like copy
, move
, list
, find
..., and also normalize their functioning between node versions.
This module don't make any changes to node fs
module, except patching close
and closeSync
, and it can be turned off.
At its core this module works like graceful-fs
but instead of cloning the fs
module it makes an augmentation of the fs
module or any other fs
model type like. Environment Variables
This module can be used like a fs
replacement module.
Usage
Install the package
npm install --save fs-extender
import * as fs from "fs-extender";
fs.copy(dir, someOtherDir, (err) => {
if (!err) {
console.log("Directory copied with sucess.");
}
});
or
const fs = require("fs-extender");
fs.copy(dir, someOtherDir, (err) => {
if (!err) {
console.log("Directory copied with sucess.");
}
});
Runing tests
npm run lint
: runs the linternpm run unit
: run unit testsnpm test
: run both lint and unit testsnpm testUlimit
: run tests defining ulimit to50
npm testMemoryLeak
: run tests to check for memoery leakagenpm testExternalFs
: run tests based on providedfs
modulenpm testExternalMockedFs
: run tests based on providedfs
module that act like a mocknpm test-all
: run all the above tests
Contribute
If you find a problem with the package you can
- Submit a Bug
- If you provide a test case it will make the issue resolution faster
or even make a
Add something new
If you wan't to add something new, following this steps would be much apreciated:
- Develop the new helper, with clean and readable code
- Develop tests for the new helper
- Include in the comments a description of what the helper does, the input arguments and what it returns
Documentation
Besides the node file system documentation for all the node fs
related functions the new methods provided can be found below.
Environment Variables - Environment variables documentation
- isEmpty => Check if given item is empty
- isEmptySync => Check if given item is empty
- statsIsDirectory => check if item is a directory
- statIsDirectorySync => check if item is a directory
- statIsFile => check if item is a file
- statIsFileSync => check if item is a file
- statIsSymbolicLink => check if item is a SymLink
- statIsSymbolicLinkSync => check if item is a SymLink
- Promises API
- fsPromises.isEmpty => Check if given item is empty
- fsPromises.statIsDirectory => check if item is a directory
- fsPromises.statIsFile => check if item is a file
- fsPromises.statIsSymbolicLink => check if item is a SymLink
Compare => Compare files or directories
- dirByte => Compare two directories in a byte-to-byte file comparison
- dirHash => Compare two directories with a hash file comparison
- dirByteSync => Compare two directories in a byte-to-byte file comparison
- dirHashSync => Compare two directories with a hash file comparison
- filesByte => Compare two files in a byte-to-byte comparison
- filesHash => Compare two files in a hash comparison
- filesByteSync => Compare two files in a byte-to-byte comparison
- filesHashSync => Compare two files in a hash comparison
- Promises API
- fsPromises.dirByte => Compare two directories in a byte-to-byte file comparison
- fsPromises.dirHash => Compare two directories with a hash file comparison
- fsPromises.filesByte => Compare two files in a byte-to-byte comparison
- fsPromises.filesHash => Compare two files in a hash comparison
Copy => Copy Files
Ensure => Ensure the existence of various items in file system
- ensureDir => Ensures directory exostence in file system
- ensureFile => Ensures file existence in file system
- ensureLink => Ensures link existence in file system
- ensureSymlink => Ensures symlink existence in file system
- ensureDirSync => Ensures directory exostence in file system
- ensureFileSync => Ensures file existence in file system
- ensureLinkSync => Ensures link existence in file system
- ensureSymlinkSync => Ensures symlink existence in file system
- Promises API
- ensureDir => Ensures directory exostence in file system
- ensureFile => Ensures file existence in file system
- ensureLink => Ensures link existence in file system
- ensureSymlink => Ensures symlink existence in file system
Find => Find items in the file system
- find => async find
- findSync => sync find
- Promise API
- promises.find => promise find
Json => Multiple json related tools to work with files
- ensureJsonFile => write object to json file ensuring file existence
- readJsonFile => read object from json file
- readJsonLines => read json file line by line
- writeJsonFile => write object to json file
- ensureJsonFileSync => write object to json file ensuring file existence
- readJsonFileSync => read object from json file
- writeJsonFileSync => write object to json file
- Promise API
- promises.ensureJsonFile => write object to json file ensuring file existence
- promises.readJsonFile => read object from json file
- promises.readJsonLines => read json file line by line
- promises.writeJsonFile => write object to json file
List => List items in file system
- list => async list
- listSync => sync list
- Promise API
- promises.list => promise list
Mkdirp => Recursive creation of directories
- mkdirp => async mkdirp
- mkdirpSync => sync mkdirp
- Promise API
- promises.mkdirp => promise mkdirp
Move => Move items in the file system
- move => async move
- moveSync => sync move
- Promise API
- promises.move => promise move
Rm => Remove items from the file system
- rm => async rm
- rmSync => sync rm
- Promise API
- promises.rm => promise rm
EmptyDir => Clean items from directory
- emptyDir => async emptyDir
- emptyDirSync => sync emptyDir
- Promise API
- promises.emptyDir => promise emptyDir
Size => Check the size of an item in the file system
- size => async size
- sizeSync => sync size
- Promise API
- promises.size => promise size
Walk => Walk through directories
- walk => async walk
- walkSync => sync walk
- Promise API
- promises.walk => promise walk
Examples
For more examples just check the tests folder
Why this module
First things first,
Why not use something like the graceful-fs
module?
When this module was started graceful-fs
changed the fs
module directly, that was a no go, if some of the node base modules must change it's way of functioning it must be done very carefully and in very rare occasions, just like the patch that this module implements in close
file functions, just like graceful-fs
now does, and because there's no way to don't use the graceful-fs
when it is loaded in another module in the chain (see why not using jest for tests).
Why not use something like the fs-extra
module?
Fisrt, because when this module was started the fs-extra didn't exist or was in their infancy, there where some tools like ncp
(abandoned copy module) and other's but it was a pain to use all that separated tools.
Second because fs-extra
is a fantastic module but in the background it operates (or used to) on top of graceful-fs
(see first awnser) and it doens't have all the tools and options that I needed.
Why not use Jest
for tests?
Because jest
uses fs-extra
as one of the dependencies and as we saw fs-extra
uses graceful-fs
and that makes impossible to test this module with jest
and there's no way to remove graceful-fs
from the chain, with this module you can bypass it if you wan't (see Environment Variables), even if it come from another module.
The modules that originated this module where using jest
for tests until jest
started using fs-extra
and then the number of perfectly valid tests failling was impressive, then mocha
to the rescue.
Credits
- ncp - One of the modules that originated all this module (forget about the name of some others)
- graceful-fs - A very good module for patching the fs module but with some flaws mainly the lack of an option to bypass the module
- fs-extra - A very good module but that don't have all the tools needed for the job (or options for the tools)
mocha
- Very good testing framework.
License
MIT License
Copyright (c) 2011 - 2021 Joao Parreira [email protected]