lib/pronto/eslint_npm.rb

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