#!/usr/bin/env ruby

# We don't have auto-loading here
require_relative '../lib/gitlab'
require_relative '../lib/gitlab/popen'
require_relative '../lib/gitlab/popen/runner'

def emit_warnings(static_analysis)
  static_analysis.warned_results.each do |result|
    puts
    puts "**** #{result.cmd.join(' ')} had the following warning(s):"
    puts
    puts result.stderr
    puts
  end
end

def emit_errors(static_analysis)
  static_analysis.failed_results.each do |result|
    puts
    puts "**** #{result.cmd.join(' ')} failed with the following error(s):"
    puts
    puts result.stdout
    puts result.stderr
    puts
  end
end

ALLOWED_WARNINGS = [
  # https://github.com/browserslist/browserslist/blob/d0ec62eb48c41c218478cd3ac28684df051cc865/node.js#L329
  # warns if caniuse-lite package is older than 6 months. Ignore this
  # warning message so that GitLab backports don't fail.
  "Browserslist: caniuse-lite is outdated. Please run next command `yarn upgrade`"
].freeze

def warning_count(static_analysis)
  static_analysis.warned_results
    .count { |result| !ALLOWED_WARNINGS.include?(result.stderr.strip) }
end

def jobs_to_run(node_index, node_total)
  all_tasks = [
    %w[bin/rake lint:all],
    %w[bundle exec license_finder],
    %w[yarn run eslint],
    %w[yarn run stylelint],
    %w[yarn run prettier-all],
    %w[bundle exec rubocop --parallel],
    %w[scripts/lint-conflicts.sh],
    %w[scripts/lint-rugged],
    %w[scripts/frontend/check_no_partial_karma_jest.sh],
    %w[scripts/lint-changelog-filenames],
    %w[scripts/gemfile_lock_changed.sh]
  ]

  case node_total
  when 1
    all_tasks
  when 2
    rake_lint_all, *rest_jobs = all_tasks
    case node_index
    when 1
      [rake_lint_all]
    else
      rest_jobs
    end
  else
    raise "Parallelization > 2 (currently set to #{node_total}) isn't supported yet!"
  end
end

tasks = jobs_to_run((ENV['CI_NODE_INDEX'] || 1).to_i, (ENV['CI_NODE_TOTAL'] || 1).to_i)
static_analysis = Gitlab::Popen::Runner.new

static_analysis.run(tasks) do |cmd, &run|
  puts
  puts "$ #{cmd.join(' ')}"

  result = run.call

  puts "==> Finished in #{result.duration} seconds"
  puts
end

puts
puts '==================================================='
puts
puts

if static_analysis.all_success_and_clean?
  puts 'All static analyses passed successfully.'
elsif static_analysis.all_success?
  puts 'All static analyses passed successfully, but we have warnings:'
  puts

  emit_warnings(static_analysis)

  exit 2 if warning_count(static_analysis).nonzero?
else
  puts 'Some static analyses failed:'

  emit_warnings(static_analysis)
  emit_errors(static_analysis)

  exit 1
end