Regular Expressions 101

Positive Lookbehind(?<="commit\s)

"committhe literal text "commit (case sensitive)

\sany whitespace character

Character Class[0-9a-fA-F]{20,}

{20,}matches at least 20 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<="commit\s)[0-9a-fA-F]{20,}

New

commit_message = "commit d1099308a1af0f91e93bf22cf6e9b5d294cf121d Author: Martin Date: Wed Apr 17 16:05:35 2019"