class RubbyCop::Cop::Bundler::DuplicatedGem

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

# bad
gem 'rubbycop'
gem 'rubbycop'

# bad
group :development do
  gem 'rubbycop'
end

group :test do
  gem 'rubbycop'
end

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

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

Constants

MSG

Public Instance Methods

investigate(processed_source) click to toggle source
# File lib/rubbycop/cop/bundler/duplicated_gem.rb, line 32
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.method_args.first.to_a.first,
        nodes.first.loc.line
      )
    end
  end
end

Private Instance Methods

duplicated_gem_nodes() click to toggle source
# File lib/rubbycop/cop/bundler/duplicated_gem.rb, line 50
def duplicated_gem_nodes
  gem_declarations(processed_source.ast)
    .group_by { |e| e.method_args.first }
    .keep_if { |_, nodes| nodes.length > 1 }
    .values
end
register_offense(node, gem_name, line_of_first_occurrence) click to toggle source
# File lib/rubbycop/cop/bundler/duplicated_gem.rb, line 57
def register_offense(node, gem_name, line_of_first_occurrence)
  line_range = node.loc.column...node.loc.last_column

  add_offense(
    node,
    source_range(processed_source.buffer, node.loc.line, line_range),
    format(MSG, gem_name, line_of_first_occurrence)
  )
end