run lints for rails with pre-commit

pre-commit

#!/usr/bin/env ruby

require "pry-byebug"

# execute pre-commit hooks
class PreCommitRunner
  def run
    check_eslint
    check_rubocop
  end

  def check_eslint
    files  = `git diff --staged --name-only | grep -E '(\\.js)$'`.split("\n").join(" ")
    puts files
    return if files.empty?
    result = `eslint --fix #{files}`
    puts result

    return if result == '' # no printed
    return if result =~ /problems \(0 errors\,/ # check errors, ignore warns
    puts "ERROR: Check eslint hints."
    exit 1 # reject
  end

  def check_rubocop
    files  = `git diff --staged --name-only | grep -E '(\\.rb)$'`.split("\n").join(" ")
    puts files
    return if files.empty?
    result = `bundle exec rubocop -RSD --force-exclusion #{files}`
    puts result

    return if result =~ /no offenses detected/ # check errors, ignore warns
    puts "ERROR: Check rubocop hints."
    puts "if you fix with autocorrect, run following code"
    puts "rubocop -a #{files}"
    exit 1 # reject
  end

  PreCommitRunner.new.run if __FILE__ == $PROGRAM_NAME
end