class RuboCop::Cop::Bundler::DuplicatedGem

A Gem's requirements should be listed only once in a Gemfile. @example

# bad
gem 'rubocop'
gem 'rubocop'

# bad
group :development do
  gem 'rubocop'
end

group :test do
  gem 'rubocop'
end

# good
group :development, :test do
  gem 'rubocop'
end

# good
gem 'rubocop', groups: [:development, :test]

Constants

MSG

Public Instance Methods

investigate(processed_source) click to toggle source
# File lib/rubocop/cop/bundler/duplicated_gem.rb, line 31
def investigate(processed_source)
  return unless processed_source.ast

  duplicated_gem_nodes.each do |nodes|
    nodes[1..-1].each do |node|
      register_offense(
        node,
        node.first_argument.to_a.first,
        nodes.first.loc.line
      )
    end
  end
end

Private Instance Methods

duplicated_gem_nodes() click to toggle source
# File lib/rubocop/cop/bundler/duplicated_gem.rb, line 49
def duplicated_gem_nodes
  gem_declarations(processed_source.ast)
    .group_by(&:first_argument)
    .values
    .select { |nodes| nodes.size > 1 }
end
register_offense(node, gem_name, line_of_first_occurrence) click to toggle source
# File lib/rubocop/cop/bundler/duplicated_gem.rb, line 56
def register_offense(node, gem_name, line_of_first_occurrence)
  line_range = node.loc.column...node.loc.last_column
  offense_location =
    source_range(processed_source.buffer, node.loc.line, line_range)

  add_offense(
    node,
    location: offense_location,
    message: format(MSG, gem_name, line_of_first_occurrence)
  )
end