Class: RubyMaat::Analysis::Churn::MainDeveloper

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

Overview

Main developer analysis - primary contributor per entity (by lines)

Instance Method Summary collapse

Instance Method Details

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



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# File 'lib/ruby_maat/analysis/churn.rb', line 162

def analyze(dataset, options = {})
  min_revs = options[:min_revs] || 5

  # Group contributions by entity and author
  entity_contributions = {}
  entity_totals = {}

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

    entity_contributions[entity] ||= {}
    entity_contributions[entity][author] ||= {added: 0, revisions: Set.new}
    entity_contributions[entity][author][:added] += added
    entity_contributions[entity][author][:revisions] << row["revision"]

    entity_totals[entity] ||= 0
    entity_totals[entity] += added
  end

  # Find main developer for each entity
  results = []

  entity_contributions.each do |entity, authors|
    total_revisions = authors.values.map { |data| data[:revisions] }.reduce(Set.new, &:|).size
    next if total_revisions < min_revs

    # Find author with most added lines (tie-break by author name alphabetically)
    main_author = authors.max_by { |author, data| [data[:added], author] }
    next unless main_author

    author_name, author_data = main_author
    total_added = entity_totals[entity]
    ownership = total_added.positive? ? (author_data[:added].to_f / total_added).round(2) : 0.0

    results << {
      entity: entity,
      "main-dev": author_name,
      added: author_data[:added],
      "total-added": total_added,
      ownership: ownership
    }
  end

  # Sort by entity name
  results.sort_by! { |r| r[:entity] }

  to_csv_data(results, %i[entity main-dev added total-added ownership])
end