aleung
unionfs
Note: This is a fork of streamich/unionfs. It holds my PRs and is published as npm module @aleung/unionfs.
Creates a union of multiple fs file systems.
npm install --save unionfsThis module allows you to use multiple objects that have file system fs API at the same time.
import {ufs} from 'unionfs';
import {fs as fs1} from 'memfs';
import * as fs2 from 'fs';
ufs
.use(fs1)
.use(fs2);
ufs.readFileSync(/* ... */);Use this module with memfs and linkfs.
memfs allows you to create virtual in-memory file system. linkfs allows you to redirect fs paths.
You can also use other fs-like objects.
import * as fs from 'fs';
import {Volume} from 'memfs';
import * as MemoryFileSystem from 'memory-fs';
import {ufs} from 'unionfs'
const vol1 = Volume.fromJSON({'/memfs-1': '1'});
const vol2 = Volume.fromJSON({'/memfs-2': '2'});
const memoryFs = new MemoryFileSystem;
memoryFs.writeFileSync('/memory-fs', '3');
ufs
.use(fs)
.use(vol1)
.use(vol2)
.use(memoryFs);
console.log(ufs.readFileSync('/memfs-1', 'utf8')); // 1
console.log(ufs.readFileSync('/memfs-2', 'utf8')); // 2
console.log(ufs.readFileSync('/memory-fs', 'utf8')); // 3You can create a Union instance manually:
import {Union} from 'unionfs';
var ufs1 = new Union;
ufs1
.use(fs)
.use(vol);
var ufs2 = new Union;
ufs2
.use(fs)
.use(/*...*/);License
Unlicense - public domain.