re = /^#!(\/usr)?\/bin\/(env )?(ba)?sh$/m
str = '#!/bin/sh
#!/bin/bash
#!/usr/bin/env bash
#!/usr/bin/env sh
#!/usr/bin/env python
#!/usr/bin/env python3'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html