README.md

File Path Filter

Filters file paths using globs, regular expressions, or custom criteria

Example

const filePathFilter = require("@jsdevtools/file-path-filter");

const paths = [
  "/some/path/index.html",
  "/some/path/contact.html",
  "/some/path/about.html",
  "/some/path/favicon.ico",
  "/some/path/img/logo.png",
];

// Filter using a glob pattern
paths.filter(filePathFilter("**/*.html"));

// Exclude glob patterns with "!"
paths.filter(filePathFilter("**/*.html", "!**/index.html"));

// Filter using a regular expression
paths.filter(filePathFilter(/\.(ico|png)$/));

// Filter using custom criteria
paths.filter(filePathFilter(path => path.length === 23));

// Use any combination of filters
paths.filter(filePathFilter([
  "**/*.html",
  "!**/index.html",
  /\.(ico|png)$/,
  path => path.length === 23
]));

// Explicitly specify include and exclude criteria
paths.filter(filePathFilter({
  include:  [
    "**/*.html",
    /\.(ico|png)$/,
    path => path.length === 23
  ],
  exclude: "**/index.html",
));

Installation

You can install File Path Filter via npm.

npm install @jsdevtools/file-path-filter

Usage

filePathFilter(criteria)

• criteria - The filter criteria. This can be any of the following:

  • A boolean. true will match all files. false will not match any files.
  • A glob pattern. If the pattern starts with !, then it will be treated as an exclude pattern (see below)
  • A regular expression
  • A filter function that accepts a file path and returns true if the file should be matched
  • An array containing any combination of the above types
  • An object with include and exclude properties. Each of these properties can be any of the above types. File paths will be matched if they match any of the include criteria and do not match any of the exclude criteria.

• return value - A filter function that matches file paths that meet the specified criteria

createFilter(options, criteria)

• options - An object with some or all of the following properties:

  • map - A function that maps filtered items to file paths
  • sep - A custom path separator, such as \ or /

• criteria - The filter criteria. See the filePathFilter for details.

• return value - A filter function that matches file paths that meet the specified criteria

The createFilter function is an alternative to the filePathFilter function that allows you to customize the behavior to suit your needs.

Filtering objects

The filePathFilter function creates a function that filters arrays of strings, but what if you need to filter an array of objects instead? That's where the map option comes in handy. You can use it to map objects (or any other value) to file paths. Here's an example:

const { createFilter } = require("@jsdevtools/file-path-filter");
const path = require("path");

const files = [
  { dir: "/my/website", filename: "index.html" },
  { dir: "/my/website", filename: "contact.html" },
  { dir: "/my/website/blog", filename: "post-1.html" },
  { dir: "/my/website/blog", filename: "post-2.html" },
];

// A function to returns the path of each file
function map(file) {
  return path.join(file.dir, file.filename);
}

// Filter the file objects - return all HTML files except the blog posts
files.filter(createFilter({ map }, "**/*.html", "!**/blog/*.html"));

Contributing

Contributions, enhancements, and bug-fixes are welcome! Open an issue on GitHub and submit a pull request.

Building

To build the project locally on your computer:

1. Clone this repo
   git clone https://github.com/JS-DevTools/file-path-filter.git

2. Install dependencies
   npm install

3. Build the code
   npm run build

4. Run the tests
   npm test

License

File Path Filter is 100% free and open-source, under the MIT license. Use it however you want.

This package is Treeware. If you use it in production, then we ask that you buy the world a tree to thank us for our work. By contributing to the Treeware forest you’ll be creating employment for local families and restoring wildlife habitats.

Big Thanks To

Thanks to these awesome companies for their support of Open Source developers ❤