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Use multiple fs modules at once
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streamich/unionfs
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Creates a union of multiplefs file systems.
npm install --save unionfsThis module allows you to use multiple objects that have file systemfs API at the same time.
import{ufs}from'unionfs';import{fsasfs1}from'memfs';import*asfs2from'fs';ufs.use(fs1).use(fs2);ufs.readFileSync(/* ... */);
Use this module withmemfs andlinkfs.memfs allows you to create virtual in-memory file system.linkfs allows you to redirectfs paths.
You can also use otherfs-like objects.
import*asfsfrom'fs';import{Volume}from'memfs';import*asMemoryFileSystemfrom'memory-fs';import{ufs}from'unionfs';constvol1=Volume.fromJSON({'/memfs-1':'1'});constvol2=Volume.fromJSON({'/memfs-2':'2'});constmemoryFs=newMemoryFileSystem();memoryFs.writeFileSync('/memory-fs','3');ufs.use(fs).use(vol1).use(vol2).use(memoryFs);console.log(ufs.readFileSync('/memfs-1','utf8'));// 1console.log(ufs.readFileSync('/memfs-2','utf8'));// 2console.log(ufs.readFileSync('/memory-fs','utf8'));// 3
You can create aUnion instance manually:
import{Union}from'unionfs';varufs1=newUnion();ufs1.use(fs).use(vol);varufs2=newUnion();ufs2.use(fs).use(/*...*/);
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