Class: StudFinder::Churn

Inherits:
Object
  • Object
show all
Defined in:
lib/stud_finder/churn.rb

Defined Under Namespace

Classes: Error, Result

Instance Method Summary collapse

Constructor Details

#initialize(repo_path:, files:, days:, stderr: $stderr) ⇒ Churn

Returns a new instance of Churn.



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# File 'lib/stud_finder/churn.rb', line 28

def initialize(repo_path:, files:, days:, stderr: $stderr)
  @repo_path = File.expand_path(repo_path)
  @files = files
  @days = days
  @stderr = stderr
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/stud_finder/churn.rb', line 35

def call
  stdout, _stderr, status = git_log
  raise Error, "Error: #{@repo_path} is not a git repository." unless status.success?

  counts = initial_counts
  file_set = counts.keys.to_h { |file| [file, true] }
  line_counts = initial_counts
  stdout.each_line do |line|
    line = line.strip
    next if line.empty?

    added, deleted, path = line.split("\t", 3)
    next if path.nil?

    relative = normalize_path(path)
    next unless file_set[relative]

    counts[relative] += 1
    line_counts[relative] += added.to_i + deleted.to_i if added != '-' && numeric?(deleted)
  end

  Result.new(
    churn_commits: counts,
    churn_lines: line_counts,
    zero_inflated: zero_inflated?(counts),
    zero_percentage: zero_percentage(counts)
  ).tap { |result| warn_if_zero_inflated(result) }
rescue Errno::ENOENT
  raise Error, 'Error: git not found in PATH.'
end