Class: RubyMaat::Analysis::Churn::ByAuthor

Inherits:
BaseAnalysis show all
Defined in:
lib/ruby_maat/analysis/churn.rb

Overview

Author churn analysis - churn metrics per author

Instance Method Summary collapse

Instance Method Details

#analyze(dataset, _options = {}) ⇒ Object 



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# File 'lib/ruby_maat/analysis/churn.rb', line 43

def analyze(dataset, _options = {})
  # Group by author and sum churn metrics, count commits
  results = {}

  dataset.to_df.each_row do |row|
    author = row["author"]
    added = row["loc_added"] || 0
    deleted = row["loc_deleted"] || 0
    revision = row["revision"]

    results[author] ||= {author: author, added: 0, deleted: 0, revisions: Set.new}
    results[author][:added] += added
    results[author][:deleted] += deleted
    results[author][:revisions] << revision
  end

  # Convert to final format
  final_results = results.values.map do |result|
    {
      author: result[:author],
      added: result[:added],
      deleted: result[:deleted],
      commits: result[:revisions].size
    }
  end

  # Sort by total churn (added + deleted) descending, then by added lines descending, then by author
  final_results.sort! do |a, b|
    total_churn_b = b[:added] + b[:deleted]
    total_churn_a = a[:added] + a[:deleted]
    churn_comparison = total_churn_b <=> total_churn_a

    if churn_comparison.zero?
      added_comparison = b[:added] <=> a[:added]
      added_comparison.zero? ? a[:author] <=> b[:author] : added_comparison
    else
      churn_comparison
    end
  end

  to_csv_data(final_results, i[author added deleted commits])
end