dir-walker-gen 

JavaScript generator pattern for efficient directory listing.

Unlike other directory walkers, this coding pattern will NOT try to scan the entire tree. The directory listings are returned as a generator pattern and the subdirectories are only scanned when the calling method has consumed all the normal files in a directory.

The async nature of the function, it yields to the calling routine allowing it to process the file as needed.

Installation

``shell
$ npm install dir-walker-gen
`

Basic Usage

`javascript
const DirGen = require('dir-walker-gen');

const options = {
folders: ["D:\\Dropbox"]
}

for (let file of DirGen(options)) {
console.log(file);
}
`

Options Object

`javascript
const DirGen = require('dir-walker-gen');

const options = {
folders: ["D:\\Dropbox", "D:\\OneDrive"],
silent: true,
ignoreDotDir: true,
excludeFolders: ['Public'],
excludeExtensions: ['tmp', 'docx', 'xlsx'],
includeExtensions: ['jpeg', 'jpg', 'png', 'gif']
};

for (let file of DirGen(options)) {
console.log(file);
}
`

| Option* | Comment | Default |
| ------ | ------- | ------- |
| folders | (Required) List of starting folders | |
| silent | Does not show console warning when directories do not exist | false |
| ignoreDotDir | Ignores directories that start with a dot (e.g. .git, .vscode, etc) | false |
| excludeFolders | Exclude all folder that ends with any of the given strings | empty list (ignore nothing) |
| excludeExtensions | List of extensions to ignore | empty list (ignore nothing) |
| includeExtensions | List of extensions to scan (all other extensions are ignored) | empty list (ignore nothing) |

Notes:
1. excludeExtensions is not really needed if includeExtensions` is supplied.
2. Include and Exclude strings are case sensitive