re = /(@(annually|yearly|monthly|weekly|daily|hourly|reboot))|(@every (\d+(ns|us|µs|ms|s|m|h))+)|(^((?!\*-)((\d+,)+\d+|([\d\*]+(\/|-)\d+)|\d+|(?<!\d)\*(?!\d)) ?){5,7})/m
str = '# should pass:
0 0 0 1 1 * 1
0 0 0 1 1 * 1,2
0 0 0 1 1 * 1,2,3
0 0 0 1 * * 1/4
0 0 0 * * 0 1-4
0 0 0 * * * 2/4
0 0 * * * * *
* * * * *
*/5 * * * *
0 0,12 1 */2 *
0 4 8-14 * *
0 0 1,15 * 3
@weekly
5 0 * 8 *
0 22 * * 1-5
23 0-20/2 * * *
0 0,12 1 */2 *
# should not pass:
*-* * * * *
* * *-1 * *
*1 * 1 * *
1* * 1 * *
'
# 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