module CodeOwnership::Private::FilePathFinder

def from_backtrace(backtrace)
  return [] unless backtrace
  # The pattern for a backtrace hasn't changed in forever and is considered
  # stable: https://github.com/ruby/ruby/blob/trunk/vm_backtrace.c#L303-L317
  #
  # This pattern matches a line like the following:
  #
  #   ./app/controllers/some_controller.rb:43:in `block (3 levels) in create'
  #
  backtrace_line = if RUBY_VERSION >= '3.4.0'
                     %r{\A(#{Pathname.pwd}/|\./)?
                         (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
                         :
                         (?<line>\d+)      # Matches '43'
                         :in\s
                         '(?<function>.*)' # Matches "`block (3 levels) in create'"
                       \z}x
                   else
                     %r{\A(#{Pathname.pwd}/|\./)?
                         (?<file>.+)       # Matches 'app/controllers/some_controller.rb'
                         :
                         (?<line>\d+)      # Matches '43'
                         :in\s
                         `(?<function>.*)' # Matches "`block (3 levels) in create'"
                       \z}x
                   end
  backtrace.lazy.filter_map do |line|
    match = line.match(backtrace_line)
    next unless match
    T.must(match[:file])
  end
end

def path_from_klass(klass)
  if klass
    path = Object.const_source_location(klass.to_s)&.first
    (path && Pathname.new(path).relative_path_from(Pathname.pwd).to_s) || nil
  end
rescue NameError
  nil
end