Filename Extension

Regular expression to capture a POSIX filename extension.

Installation

$ npm install regex-extname-posix

Usage

var re = require( 'regex-extname-posix' );

re

Regular expression to capture a POSIX filename extension.

var ext = re.exec( 'index.js' )[ 1 ];
// returns '.js'

Notes

• When executed against dotfile filenames (e.g., .gitignore), the regular expression does not capture the basename as a filename extension.

  var ext = re.exec( '.bash_profile' )[ 1 ];
  // returns ''
  
  ext = re.exec( '.travis.yml' )[ 1 ];
  // returns '.yml'

Examples

var re = require( 'regex-extname-posix' );

var ext;

ext = re.exec( 'index.js' )[ 1 ];
// returns '.js'

ext = re.exec( '/foo/bar/home.html' )[ 1 ];
// returns '.html'

ext = re.exec( 'foo/file.pdf' )[ 1 ];
// returns '.pdf'

ext = re.exec( 'beep.' )[ 1 ];
// returns '.'

ext = re.exec( '' )[ 1 ];
// returns ''

ext = re.exec( '/foo/bar/file' )[ 1 ];
// returns ''

ext = re.exec( '/foo/bar/.gitignore' )[ 1 ];
// returns ''

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

License

MIT license.

Copyright

Copyright © 2015. Athan Reines.