lib/pronto/eslint.rb

   1 require 'pronto'
   2 require 'eslintrb'
   3 require 'globby'
   4
   5 module Pronto
   6   class ESLint < Runner
   7     def run
   8       return [] unless @patches
   9
  10       @patches.select { |patch| patch.additions > 0 }
  11         .select { |patch| js_file?(patch.new_file_full_path) }
  12         .map { |patch| inspect(patch) }
  13         .flatten.compact
  14     end
  15
  16     def inspect(patch)
  17       options = File.exist?('.eslintrc') ? :eslintrc : :defaults
  18       offences = Eslintrb.lint(patch.new_file_full_path, options).compact
  19
  20       offences.map do |offence|
  21         patch.added_lines.select { |line| line.new_lineno == offence['line'] }
  22           .map { |line| new_message(offence, line) }
  23       end
  24     end
  25
  26     def new_message(offence, line)
  27       path = line.patch.delta.new_file[:path]
  28       level = :warning
  29
  30       Message.new(path, line, level, offence['message'], nil, self.class)
  31     end
  32
  33     def js_file?(path)
  34       %w(.js .es6 .js.es6).include?(File.extname(path)) && !eslintignore_matches?(path)
  35     end
  36
  37     def eslintignore_matches?(path)
  38       @_repo_path ||= @patches.first.repo.path
  39       @_eslintignore_path ||= File.join(@_repo_path, '.eslintignore')
  40       @_eslintignore_exists ||= File.exist?(@_eslintignore_path)
  41
  42       return false unless @_eslintignore_exists
  43
  44       @_eslintignored_files ||=
  45         Dir.chdir @_repo_path do # change to the repo path where `.eslintignore` was found
  46           eslintignore_content = File.readlines(@_eslintignore_path).map(&:chomp)
  47           ignored_files = Globby.select(eslintignore_content)
  48
  49           # prefix each found file with `repo_path`, because `path` is absolute, too
  50           ignored_files.map { |file| File.join(@_repo_path, file).to_s }
  51         end
  52
  53       @_eslintignored_files.include?(path.to_s)
  54     end
  55   end
  56 end