lib/pronto/eslint_npm.rb

   1 require 'pronto'
   2 require 'shellwords'
   3
   4 module Pronto
   5   class ESLintNpm < Runner
   6     def run
   7       return [] unless @patches
   8
   9       @patches.select { |patch| patch.additions > 0 }
  10         .select { |patch| js_file?(patch.new_file_full_path) }
  11         .map { |patch| inspect(patch) }
  12         .flatten.compact
  13     end
  14
  15     def inspect(patch)
  16       @_repo_path ||= @patches.first.repo.path
  17
  18       offences = run_eslint(patch)
  19       clean_up_eslint_output(offences)
  20         .map do |offence|
  21           patch
  22             .added_lines
  23             .select { |line| line.new_lineno == offence['line'] }
  24             .map { |line| new_message(offence, line) }
  25         end
  26     end
  27
  28     private
  29
  30     def new_message(offence, line)
  31       path = line.patch.delta.new_file[:path]
  32       level = :warning
  33
  34       Message.new(path, line, level, offence['message'], nil, self.class)
  35     end
  36
  37     def js_file?(path)
  38       %w(.js .es6 .js.es6).include?(File.extname(path))
  39     end
  40
  41     def run_eslint(patch)
  42       Dir.chdir(@_repo_path) do
  43         JSON.parse(
  44           `eslint #{Shellwords.escape(patch.new_file_full_path.to_s)} -f json`
  45         )
  46       end
  47     end
  48
  49     # rubocop:disable Metrics/LineLength
  50     def clean_up_eslint_output(output)
  51       # 1. Filter out offences without a warning or error
  52       # 2. Get the messages for that file
  53       # 3. Ignore errors without a line number for now
  54       output
  55         .select { |offence| offence['errorCount'] + offence['warningCount'] > 0 }
  56         .map { |offence| offence['messages'] }
  57         .flatten.select { |offence| offence['line'] }
  58     end
  59   end
  60 end