Go (RE2)

GitHub Repository URL in GO

Match GitHub repository URLs and capture the owner and repo segments.

Try it in the GO tester →

Pattern

regexGO
https?:\/\/(?:www\.)?github\.com\/([A-Za-z0-9](?:[A-Za-z0-9\-]{0,38})?)\/([A-Za-z0-9._\-]{1,100})   (flags: g)

Go (RE2) code

goGo
package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`https?:\/\/(?:www\.)?github\.com\/([A-Za-z0-9](?:[A-Za-z0-9\-]{0,38})?)\/([A-Za-z0-9._\-]{1,100})`)
	input := `Source at https://github.com/vercel/next.js or https://www.github.com/torvalds/linux`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

How the pattern works

https?:\/\/(?:www\.)?github\.com\/ matches the domain with optional www and either http/https. The first capture ([A-Za-z0-9](?:[A-Za-z0-9\-]{0,38})?) follows GitHub's username rules: 1–39 chars, alphanumeric + hyphens, no leading/trailing hyphen (simplified). The second capture matches the repo name with the broader allowed character set.

Examples

Input

Source at https://github.com/vercel/next.js or https://www.github.com/torvalds/linux

Matches

  • https://github.com/vercel/next.js
  • https://www.github.com/torvalds/linux

Input

Star: https://github.com/anthropics/claude-code

Matches

  • https://github.com/anthropics/claude-code

Input

no github links

No match

—

Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Python (re)

Supported

See how this pattern looks (and behaves) in Python's stdlib `re` module.

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