Lucene/Solr: Parse contributors from our CHANGES.txt for easy sharing / tabulation.

parseContributorsFromChanges.py

import re
from collections import defaultdict
data = """
==================  9.6.0 ==================
New Features
---------------------
* SOLR-17141: Implement 'cpuAllowed' query parameter to limit the maximum CPU usage by a running query. (Andrzej Bialecki, Gus Heck, David Smiley)

* SOLR-599: Add a new SolrJ client using the JDK’s built-in Http Client.  (James Dyer)

* SOLR-16403: A new cluster singleton plugin to automatically remove inactive shards. (Paul McArthur, David Smiley)

* SOLR-16466: Admin UI - Make it optional to sort list of commandline args (Shawn Heisey, Vincenzo D'Amore via Christine Poerschke)

etc.
"""
# Initialize a default dictionary to store contributors and their counts
contributors = defaultdict(int)
# Remove newlines and split the data into lines
lines = data.replace('\n', ' ').split('*')
# Regular expression to find contributors
pattern = re.compile(r'\((.*?)\)')
for line in lines:
  # Find all contributors in the line
  matches = pattern.findall(line)
  if matches:
    for match in matches:
      # might have a "via" committer; we only want the author here
      match = match.split(" via ")[0] # keep left side
      # Split the contributors by comma and strip whitespace
      for contributor in match.split(','):
        contributor = contributor.strip()
        contributors[contributor] += 1
# Print the contributors and their counts
for contributor, count in sorted(contributors.items(), key=lambda item: item[1], reverse=True):
  print(f'{contributor}: {count}')

Tested the script, works well. Guess there's a risk of spelling variations for names etc that will pop up on larger data sets.

Replaced by apache/solr#2424 which is improved.