Simple virtual file system

Maintains a config object with dirs and files

this.config = {
  opts,
  dirs: {},
  files: {}
}

File operations

• async copy(srcPath, targetPath)

• async fileExists(filePath)

• async makeDir(dirPath)

• async readFile(filePath)

• async writeFile(filePath, data)

• toString() returns lastWritten filePath

• clear() - clears file system

State

Maintains a lastWritten object which contains the last written file object (filePath and data)

Also maintains a files object, with entries for each file and a dirs object, with entries for each folder.

Copy

Copy will try to copy (via vfs writeFile) directly from vfs file via readFile. If no such vfs file is present, it will copy "on disk" file content to target path in vfs (also via vfs writeFile).

Files

The files object has an entry for each file name generated. The value of each entry is a lastWritten object with filePath and data

  async writeFile(filePath, data) {
    let lastWritten = {
      filePath,
      data
    }
    this.config.files[filePath] = lastWritten
    this.config.lastWritten = lastWritten
  }

Files entries

The files object would look like this:

 {
   'app/services/add/Readme.md': {
     filePath: 'app/services/add/Readme.md'
     data: 'addition'
   },
   'app/services/mul/Readme.md': {
     filePath: 'app/services/mul/Readme.md'
     data: 'multiplication'
   }
 }

Testing

$ ava or $ npm test

Coverage tests

$ nyc ava or $ npm test:coverage

Scoped lerna

To update dependencies of a single project:

remove package.json.lock

Delete out all module dependencies in /node_modules

$ lerna clean --scope @tecla5/vfs

Bootstrap package, by installing/linking new modules

$ lerna bootstrap --scope @tecla5/vfs

This should also create a brand new package.json.lock

Lerna quick update

$ npm run lerna:update
# lerna info ...

Update npm dependencies

npm-check-updates

Install CLI binary globally

npm i -g npm-check-updates

Update project dependencies:

$ ncu -ua