Glamm: Python to JavaScript Regex Converter

Glamm is a lightweight utility that converts Python-flavored regular expressions into JavaScript-compatible ones. It helps bridge the gap between the regex syntax of the two languages, allowing you to use familiar Python patterns in a JavaScript environment.

Features

Glamm currently supports the following conversions:

• Named Capture Groups: (?P<name>...) is converted to (?<name>...)
• Named Group References: (?P=name) is converted to \k<name>
• Possessive Quantifiers: *+, ++, ?+ are converted to their JavaScript equivalents.
• Start of String Anchor: \A is converted to ^.
• End of String Anchors: \Z and \z are converted to $.
• Inline Flags: Extracts flags like i, s, m, u from (?is...).
• Inline Comments: (?#...) are removed.

Code Example

Here's an example of how to use Glamm to convert a Python regex pattern:

import { glamm } from "glamm";

const pythonPattern = "(?i)(?P<username>\w+), (?P=username)@gmail.com";

const { regex } = glamm(pythonPattern);

console.log(regex);
// Output: /(?<username>\w+), \k<username>@gmail.com/i

Testing

This project uses Vitest for testing. To run the tests, use the following command:

npm test

Coverage

To generate a test coverage report, run:

npm run coverage

This will create a coverage directory with a detailed report.