Community Health

Ratio of code committed by contributors other than original project initiator Contributions are going up beyond the core team

GHTorrent:

The assumption is that the first person to commit to a GitHub repository after it is created is the creator of the repository.

We need to figure out how many commits were made by that user.

  SELECT count(commits.id), projects.name, WEEK(commits.created_at)
  FROM users
  JOIN commits on users.id = commits.author_id
  JOIN projects on projects.id = commits.project_id
  WHERE (users.id, projects.id) IN
  	(SELECT user_id, project_id FROM
    	(SELECT users.id as user_id, projects.id as project_id, min(commits.created_at) 
	    FROM commits
	    JOIN projects on projects.id = commits.project_id
	    JOIN users on commits.author_id = users.id
	    WHERE commits.created_at > projects.created_at
	    group by projects.id) as earliest_committers)
  GROUP BY projects.id, WEEK(commits.created_at)

Commits made by users other than that user:

  SELECT count(commits.id), projects.name, WEEK(commits.created_at)
  FROM users
  JOIN commits on users.id = commits.author_id
  JOIN projects on projects.id = commits.project_id
  WHERE (users.id, projects.id) NOT IN
    (SELECT user_id, project_id FROM
	    (SELECT users.id as user_id, projects.id as project_id, min(commits.created_at) 
	    FROM commits
	    JOIN projects on projects.id = commits.project_id
	    JOIN users on commits.author_id = users.id
	    WHERE commits.created_at > projects.created_at
	    group by projects.id) as earliest_committers)
  GROUP BY projects.id, WEEK(commits.created_at)

Anna Buhman