nexe-fs
v1.0.1
Published
Virtual File System used by nexe
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nexe-fs
This module contains a set of patches used to create (and use) the nexe virtual filesystem
Getting Started:
To patch the module loader, monkey patches must be installed on a few methods at the time that node boots up. This requires a special build of node. Nexe provides these builds or the patch can be applied from this module manually in your own build setup.
const bootstrapPatch = fs.readFileSync(require.resolve('nexe-fs/bootstrap'), 'utf-8')
// insert boostrapPatch wherever node starts up. For reference, Nexe does this
// in third-party-main.ts
To create a virtual file system use the Bundle
Object
const { Bundle } = require('nexe-fs')
const bundle = new Bundle({ cwd })
await bundle.addResource(absoluteFileName)
bundle.toStream().pipe(fs.createWriteStream('./myFsBlob'))
// You'll also want to save the bundle index to use at runtime
// It can be saved by accessing bundle.index (object/hash) or serializing the bundle with JSON.stringify(bundle)
In the entrypoint of the custom node build, the fs patch needs to be applied
const fakeFs = fs.readFileSync(require.resolve('nexe-fs/patch'), 'utf-8')
//apply this code to your entrypoint
The patch exposes two methods, shimFs
and restoreFs
to be used as follows:
shimFs({
blobPath: 'location/of/myFsBlob',
resources: bundle.index,
layout: {
stat: blobStats //fs.Stats object about the blob at blobPath
resourceStart: 0 // the offset within the blob that is referenced by the bundle index
}
})
At this point executing the original entrypoint shoudl result in usage of the virtual filesystem.