Merge branch '41972-make-sure-no-warnings' into 'master'

Fail static-analysis if there's output to stderr

Closes #41972

See merge request gitlab-org/gitlab-ce!16648

.gitlab-ci.yml

@@ -321,6 +321,7 @@ setup-test-env:
     expire_in: 7d
     paths:
       - tmp/tests
+      - config/secrets.yml
 
 rspec-pg 0 27: *rspec-metadata-pg
 rspec-pg 1 27: *rspec-metadata-pg

Gemfile

@@ -325,7 +325,7 @@ group :development, :test do
   gem 'spinach-rerun-reporter', '~> 0.0.2'
   gem 'rspec_profiling', '~> 0.0.5'
   gem 'rspec-set', '~> 0.1.3'
-  gem 'rspec-parameterized'
+  gem 'rspec-parameterized', require: false
 
   # Prevent occasions where minitest is not bundled in packaged versions of ruby (see #3826)
   gem 'minitest', '~> 5.7.0'

Gemfile.lock

@@ -304,7 +304,7 @@ GEM
       mime-types (>= 1.16)
       posix-spawn (~> 0.3)
     gitlab-markup (1.6.3)
-    gitlab-styles (2.3.1)
+    gitlab-styles (2.3.2)
       rubocop (~> 0.51)
       rubocop-gitlab-security (~> 0.1.0)
       rubocop-rspec (~> 1.19)

bin/upgrade.rb

@@ -1,3 +0,0 @@
-require_relative "../lib/gitlab/upgrader"
-
-Gitlab::Upgrader.new.execute

config/application.rb

@@ -6,6 +6,7 @@ Bundler.require(:default, Rails.env)
 
 module Gitlab
   class Application < Rails::Application
+    require_dependency Rails.root.join('lib/gitlab/redis/wrapper')
     require_dependency Rails.root.join('lib/gitlab/redis/cache')
     require_dependency Rails.root.join('lib/gitlab/redis/queues')
     require_dependency Rails.root.join('lib/gitlab/redis/shared_state')

lib/gitlab/popen.rb

@@ -5,7 +5,17 @@ module Gitlab
   module Popen
     extend self
 
-    def popen(cmd, path = nil, vars = {})
+    Result = Struct.new(:cmd, :stdout, :stderr, :status, :duration)
+
+    # Returns [stdout + stderr, status]
+    def popen(cmd, path = nil, vars = {}, &block)
+      result = popen_with_detail(cmd, path, vars, &block)
+
+      [result.stdout << result.stderr, result.status&.exitstatus]
+    end
+
+    # Returns Result
+    def popen_with_detail(cmd, path = nil, vars = {})
       unless cmd.is_a?(Array)
         raise "System commands must be given as an array of strings"
       end
@@ -18,18 +28,21 @@ module Gitlab
         FileUtils.mkdir_p(path)
       end
 
-      cmd_output = ""
-      cmd_status = 0
+      cmd_stdout = ''
+      cmd_stderr = ''
+      cmd_status = nil
+      start = Time.now
+
       Open3.popen3(vars, *cmd, options) do |stdin, stdout, stderr, wait_thr|
         yield(stdin) if block_given?
         stdin.close
 
-        cmd_output << stdout.read
-        cmd_output << stderr.read
-        cmd_status = wait_thr.value.exitstatus
+        cmd_stdout = stdout.read
+        cmd_stderr = stderr.read
+        cmd_status = wait_thr.value
       end
 
-      [cmd_output, cmd_status]
+      Result.new(cmd, cmd_stdout, cmd_stderr, cmd_status, Time.now - start)
     end
   end
 end

lib/gitlab/popen/runner.rb

@@ -0,0 +1,46 @@
+module Gitlab
+  module Popen
+    class Runner
+      attr_reader :results
+
+      def initialize
+        @results = []
+      end
+
+      def run(commands, &block)
+        commands.each do |cmd|
+          # yield doesn't support blocks, so we need to use a block variable
+          block.call(cmd) do # rubocop:disable Performance/RedundantBlockCall
+            cmd_result = Gitlab::Popen.popen_with_detail(cmd)
+
+            results << cmd_result
+
+            cmd_result
+          end
+        end
+      end
+
+      def all_success_and_clean?
+        all_success? && all_stderr_empty?
+      end
+
+      def all_success?
+        results.all? { |result| result.status.success? }
+      end
+
+      def all_stderr_empty?
+        results.all? { |result| result.stderr.empty? }
+      end
+
+      def failed_results
+        results.reject { |result| result.status.success? }
+      end
+
+      def warned_results
+        results.select do |result|
+          result.status.success? && !result.stderr.empty?
+        end
+      end
+    end
+  end
+end

lib/gitlab/redis/cache.rb

@@ -1,5 +1,5 @@
 # please require all dependencies below:
-require_relative 'wrapper' unless defined?(::Gitlab::Redis::Wrapper)
+require_relative 'wrapper' unless defined?(::Rails) && ::Rails.root.present?
 
 module Gitlab
   module Redis

lib/gitlab/task_helpers.rb

@@ -1,6 +1,7 @@
 require 'rainbow/ext/string'
 require 'gitlab/utils/strong_memoize'
 
+# rubocop:disable Rails/Output
 module Gitlab
   TaskFailedError = Class.new(StandardError)
   TaskAbortedByUserError = Class.new(StandardError)
@@ -96,11 +97,9 @@ module Gitlab
     end
 
     def gid_for(group_name)
-      begin
-        Etc.getgrnam(group_name).gid
-      rescue ArgumentError # no group
-        "group #{group_name} doesn't exist"
-      end
+      Etc.getgrnam(group_name).gid
+    rescue ArgumentError # no group
+      "group #{group_name} doesn't exist"
     end
 
     def gitlab_user

lib/gitlab/upgrader.rb

@@ -1,6 +1,3 @@
-require_relative "popen"
-require_relative "version_info"
-
 module Gitlab
   class Upgrader
     def execute

lib/system_check/helpers.rb

@@ -1,5 +1,3 @@
-require 'tasks/gitlab/task_helpers'
-
 module SystemCheck
   module Helpers
     include ::Gitlab::TaskHelpers

lib/tasks/flay.rake

@@ -1,6 +1,6 @@
 desc 'Code duplication analyze via flay'
 task :flay do
-  output = `bundle exec flay --mass 35 app/ lib/gitlab/`
+  output = `bundle exec flay --mass 35 app/ lib/gitlab/ 2> #{File::NULL}`
 
   if output.include? "Similar code found"
     puts output

lib/tasks/gitlab/backup.rake

@@ -4,7 +4,7 @@ namespace :gitlab do
   namespace :backup do
     # Create backup of GitLab system
     desc "GitLab | Create a backup of the GitLab system"
-    task create: :environment do
+    task create: :gitlab_environment do
       warn_user_is_not_gitlab
       configure_cron_mode
 
@@ -25,7 +25,7 @@ namespace :gitlab do
 
     # Restore backup of GitLab system
     desc 'GitLab | Restore a previously created backup'
-    task restore: :environment do
+    task restore: :gitlab_environment do
       warn_user_is_not_gitlab
       configure_cron_mode
 
@@ -73,7 +73,7 @@ namespace :gitlab do
     end
 
     namespace :repo do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping repositories ...".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("repositories")
@@ -84,7 +84,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring repositories ...".color(:blue)
         Backup::Repository.new.restore
         $progress.puts "done".color(:green)
@@ -92,7 +92,7 @@ namespace :gitlab do
     end
 
     namespace :db do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping database ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("db")
@@ -103,7 +103,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring database ... ".color(:blue)
         Backup::Database.new.restore
         $progress.puts "done".color(:green)
@@ -111,7 +111,7 @@ namespace :gitlab do
     end
 
     namespace :builds do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping builds ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("builds")
@@ -122,7 +122,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring builds ... ".color(:blue)
         Backup::Builds.new.restore
         $progress.puts "done".color(:green)
@@ -130,7 +130,7 @@ namespace :gitlab do
     end
 
     namespace :uploads do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping uploads ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("uploads")
@@ -141,7 +141,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring uploads ... ".color(:blue)
         Backup::Uploads.new.restore
         $progress.puts "done".color(:green)
@@ -149,7 +149,7 @@ namespace :gitlab do
     end
 
     namespace :artifacts do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping artifacts ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("artifacts")
@@ -160,7 +160,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring artifacts ... ".color(:blue)
         Backup::Artifacts.new.restore
         $progress.puts "done".color(:green)
@@ -168,7 +168,7 @@ namespace :gitlab do
     end
 
     namespace :pages do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping pages ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("pages")
@@ -179,7 +179,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring pages ... ".color(:blue)
         Backup::Pages.new.restore
         $progress.puts "done".color(:green)
@@ -187,7 +187,7 @@ namespace :gitlab do
     end
 
     namespace :lfs do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping lfs objects ... ".color(:blue)
 
         if ENV["SKIP"] && ENV["SKIP"].include?("lfs")
@@ -198,7 +198,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring lfs objects ... ".color(:blue)
         Backup::Lfs.new.restore
         $progress.puts "done".color(:green)
@@ -206,7 +206,7 @@ namespace :gitlab do
     end
 
     namespace :registry do
-      task create: :environment do
+      task create: :gitlab_environment do
         $progress.puts "Dumping container registry images ... ".color(:blue)
 
         if Gitlab.config.registry.enabled
@@ -221,7 +221,7 @@ namespace :gitlab do
         end
       end
 
-      task restore: :environment do
+      task restore: :gitlab_environment do
         $progress.puts "Restoring container registry images ... ".color(:blue)
 
         if Gitlab.config.registry.enabled

lib/tasks/gitlab/check.rake

@@ -1,7 +1,3 @@
-# Temporary hack, until we migrate all checks to SystemCheck format
-require 'system_check'
-require 'system_check/helpers'
-
 namespace :gitlab do
   desc 'GitLab | Check the configuration of GitLab and its environment'
   task check: %w{gitlab:gitlab_shell:check
@@ -12,7 +8,7 @@ namespace :gitlab do
 
   namespace :app do
     desc 'GitLab | Check the configuration of the GitLab Rails app'
-    task check: :environment  do
+    task check: :gitlab_environment do
       warn_user_is_not_gitlab
 
       checks = [
@@ -43,7 +39,7 @@ namespace :gitlab do
 
   namespace :gitlab_shell do
     desc "GitLab | Check the configuration of GitLab Shell"
-    task check: :environment  do
+    task check: :gitlab_environment do
       warn_user_is_not_gitlab
       start_checking "GitLab Shell"
 
@@ -251,7 +247,7 @@ namespace :gitlab do
 
   namespace :sidekiq do
     desc "GitLab | Check the configuration of Sidekiq"
-    task check: :environment  do
+    task check: :gitlab_environment do
       warn_user_is_not_gitlab
       start_checking "Sidekiq"
 
@@ -310,7 +306,7 @@ namespace :gitlab do
 
   namespace :incoming_email do
     desc "GitLab | Check the configuration of Reply by email"
-    task check: :environment  do
+    task check: :gitlab_environment do
       warn_user_is_not_gitlab
 
       if Gitlab.config.incoming_email.enabled
@@ -333,7 +329,7 @@ namespace :gitlab do
   end
 
   namespace :ldap do
-    task :check, [:limit] => :environment do |_, args|
+    task :check, [:limit] => :gitlab_environment do |_, args|
       # Only show up to 100 results because LDAP directories can be very big.
       # This setting only affects the `rake gitlab:check` script.
       args.with_defaults(limit: 100)
@@ -389,7 +385,7 @@ namespace :gitlab do
 
   namespace :repo do
     desc "GitLab | Check the integrity of the repositories managed by GitLab"
-    task check: :environment do
+    task check: :gitlab_environment do
       puts "This task is deprecated. Please use gitlab:git:fsck instead".color(:red)
       Rake::Task["gitlab:git:fsck"].execute
     end
@@ -397,7 +393,7 @@ namespace :gitlab do
 
   namespace :orphans do
     desc 'Gitlab | Check for orphaned namespaces and repositories'
-    task check: :environment do
+    task check: :gitlab_environment do
       warn_user_is_not_gitlab
       checks = [
         SystemCheck::Orphans::NamespaceCheck,
@@ -408,7 +404,7 @@ namespace :gitlab do
     end
 
     desc 'GitLab | Check for orphaned namespaces in the repositories path'
-    task check_namespaces: :environment do
+    task check_namespaces: :gitlab_environment do
       warn_user_is_not_gitlab
       checks = [SystemCheck::Orphans::NamespaceCheck]
 
@@ -416,7 +412,7 @@ namespace :gitlab do
     end
 
     desc 'GitLab | Check for orphaned repositories in the repositories path'
-    task check_repositories: :environment do
+    task check_repositories: :gitlab_environment do
       warn_user_is_not_gitlab
       checks = [SystemCheck::Orphans::RepositoryCheck]
 
@@ -426,7 +422,7 @@ namespace :gitlab do
 
   namespace :user do
     desc "GitLab | Check the integrity of a specific user's repositories"
-    task :check_repos, [:username] => :environment do |t, args|
+    task :check_repos, [:username] => :gitlab_environment do |t, args|
       username = args[:username] || prompt("Check repository integrity for username? ".color(:blue))
       user = User.find_by(username: username)
       if user

lib/tasks/gitlab/cleanup.rake

@@ -5,7 +5,7 @@ namespace :gitlab do
     HASHED_REPOSITORY_NAME = '@hashed'.freeze
 
     desc "GitLab | Cleanup | Clean namespaces"
-    task dirs: :environment  do
+    task dirs: :gitlab_environment do
       warn_user_is_not_gitlab
       remove_flag = ENV['REMOVE']
 
@@ -49,7 +49,7 @@ namespace :gitlab do
     end
 
     desc "GitLab | Cleanup | Clean repositories"
-    task repos: :environment  do
+    task repos: :gitlab_environment do
       warn_user_is_not_gitlab
 
       move_suffix = "+orphaned+#{Time.now.to_i}"
@@ -78,7 +78,7 @@ namespace :gitlab do
     end
 
     desc "GitLab | Cleanup | Block users that have been removed in LDAP"
-    task block_removed_ldap_users: :environment  do
+    task block_removed_ldap_users: :gitlab_environment do
       warn_user_is_not_gitlab
       block_flag = ENV['BLOCK']
 
@@ -109,7 +109,7 @@ namespace :gitlab do
     # released. So likely this should only be run once on gitlab.com
     # Faulty refs are moved so they are kept around, else some features break.
     desc 'GitLab | Cleanup | Remove faulty deployment refs'
-    task move_faulty_deployment_refs: :environment do
+    task move_faulty_deployment_refs: :gitlab_environment do
       projects = Project.where(id: Deployment.select(:project_id).distinct)
 
       projects.find_each do |project|

lib/tasks/gitlab/git.rake

@@ -1,7 +1,7 @@
 namespace :gitlab do
   namespace :git do
     desc "GitLab | Git | Repack"
-    task repack: :environment do
+    task repack: :gitlab_environment do
       failures = perform_git_cmd(%W(#{Gitlab.config.git.bin_path} repack -a --quiet), "Repacking repo")
       if failures.empty?
         puts "Done".color(:green)
@@ -11,7 +11,7 @@ namespace :gitlab do
     end
 
     desc "GitLab | Git | Run garbage collection on all repos"
-    task gc: :environment do
+    task gc: :gitlab_environment do
       failures = perform_git_cmd(%W(#{Gitlab.config.git.bin_path} gc --auto --quiet), "Garbage Collecting")
       if failures.empty?
         puts "Done".color(:green)
@@ -21,7 +21,7 @@ namespace :gitlab do
     end
 
     desc "GitLab | Git | Prune all repos"
-    task prune: :environment do
+    task prune: :gitlab_environment do
       failures = perform_git_cmd(%W(#{Gitlab.config.git.bin_path} prune), "Git Prune")
       if failures.empty?
         puts "Done".color(:green)
@@ -31,7 +31,7 @@ namespace :gitlab do
     end
 
     desc 'GitLab | Git | Check all repos integrity'
-    task fsck: :environment do
+    task fsck: :gitlab_environment do
       failures = perform_git_cmd(%W(#{Gitlab.config.git.bin_path} fsck --name-objects --no-progress), "Checking integrity") do |repo|
         check_config_lock(repo)
         check_ref_locks(repo)

lib/tasks/gitlab/gitaly.rake

@@ -1,7 +1,7 @@
 namespace :gitlab do
   namespace :gitaly do
     desc "GitLab | Install or upgrade gitaly"
-    task :install, [:dir, :repo] => :environment do |t, args|
+    task :install, [:dir, :repo] => :gitlab_environment do |t, args|
       require 'toml'
 
       warn_user_is_not_gitlab

lib/tasks/gitlab/helpers.rake

@@ -1,8 +1,6 @@
-require 'tasks/gitlab/task_helpers'
-
 # Prevent StateMachine warnings from outputting during a cron task
 StateMachines::Machine.ignore_method_conflicts = true if ENV['CRON']
 
-namespace :gitlab do
+task gitlab_environment: :environment do
   extend SystemCheck::Helpers
 end

lib/tasks/gitlab/info.rake

@@ -1,7 +1,7 @@
 namespace :gitlab do
   namespace :env do
     desc "GitLab | Show information about GitLab and its environment"
-    task info: :environment  do
+    task info: :gitlab_environment do
       # check if there is an RVM environment
       rvm_version = run_and_match(%w(rvm --version), /[\d\.]+/).try(:to_s)
       # check Ruby version

lib/tasks/gitlab/setup.rake

@@ -1,6 +1,6 @@
 namespace :gitlab do
   desc "GitLab | Setup production application"
-  task setup: :environment do
+  task setup: :gitlab_environment do
     setup_db
   end
 

lib/tasks/gitlab/shell.rake

@@ -1,7 +1,7 @@
 namespace :gitlab do
   namespace :shell do
     desc "GitLab | Install or upgrade gitlab-shell"
-    task :install, [:repo] => :environment do |t, args|
+    task :install, [:repo] => :gitlab_environment do |t, args|
       warn_user_is_not_gitlab
 
       default_version = Gitlab::Shell.version_required
@@ -58,12 +58,12 @@ namespace :gitlab do
     end
 
     desc "GitLab | Setup gitlab-shell"
-    task setup: :environment do
+    task setup: :gitlab_environment do
       setup
     end
 
     desc "GitLab | Build missing projects"
-    task build_missing_projects: :environment do
+    task build_missing_projects: :gitlab_environment do
       Project.find_each(batch_size: 1000) do |project|
         path_to_repo = project.repository.path_to_repo
         if File.exist?(path_to_repo)
@@ -80,7 +80,7 @@ namespace :gitlab do
     end
 
     desc 'Create or repair repository hooks symlink'
-    task create_hooks: :environment do
+    task create_hooks: :gitlab_environment do
       warn_user_is_not_gitlab
 
       puts 'Creating/Repairing hooks symlinks for all repositories'

lib/tasks/gitlab/workhorse.rake

@@ -1,7 +1,7 @@
 namespace :gitlab do
   namespace :workhorse do
     desc "GitLab | Install or upgrade gitlab-workhorse"
-    task :install, [:dir, :repo] => :environment do |t, args|
+    task :install, [:dir, :repo] => :gitlab_environment do |t, args|
       warn_user_is_not_gitlab
 
       unless args.dir.present?

lib/tasks/haml-lint.rake

@@ -2,5 +2,14 @@ unless Rails.env.production?
   require 'haml_lint/rake_task'
   require 'haml_lint/inline_javascript'
 
+  # Workaround for warnings from parser/current
+  # TODO: Remove this after we update parser gem
+  task :haml_lint do
+    require 'parser'
+    def Parser.warn(*args)
+      puts(*args) # static-analysis ignores stdout if status is 0
+    end
+  end
+
   HamlLint::RakeTask.new
 end

lib/tasks/migrate/setup_postgresql.rake

@@ -1,16 +1,14 @@
-require Rails.root.join('lib/gitlab/database')
-require Rails.root.join('lib/gitlab/database/migration_helpers')
-require Rails.root.join('db/migrate/20151007120511_namespaces_projects_path_lower_indexes')
-require Rails.root.join('db/migrate/20151008110232_add_users_lower_username_email_indexes')
-require Rails.root.join('db/migrate/20161212142807_add_lower_path_index_to_routes')
-require Rails.root.join('db/migrate/20170317203554_index_routes_path_for_like')
-require Rails.root.join('db/migrate/20170724214302_add_lower_path_index_to_redirect_routes')
-require Rails.root.join('db/migrate/20170503185032_index_redirect_routes_path_for_like')
-require Rails.root.join('db/migrate/20171220191323_add_index_on_namespaces_lower_name.rb')
-require Rails.root.join('db/migrate/20180113220114_rework_redirect_routes_indexes.rb')
-
 desc 'GitLab | Sets up PostgreSQL'
 task setup_postgresql: :environment do
+  require Rails.root.join('db/migrate/20151007120511_namespaces_projects_path_lower_indexes')
+  require Rails.root.join('db/migrate/20151008110232_add_users_lower_username_email_indexes')
+  require Rails.root.join('db/migrate/20161212142807_add_lower_path_index_to_routes')
+  require Rails.root.join('db/migrate/20170317203554_index_routes_path_for_like')
+  require Rails.root.join('db/migrate/20170724214302_add_lower_path_index_to_redirect_routes')
+  require Rails.root.join('db/migrate/20170503185032_index_redirect_routes_path_for_like')
+  require Rails.root.join('db/migrate/20171220191323_add_index_on_namespaces_lower_name.rb')
+  require Rails.root.join('db/migrate/20180113220114_rework_redirect_routes_indexes.rb')
+
   NamespacesProjectsPathLowerIndexes.new.up
   AddUsersLowerUsernameEmailIndexes.new.up
   AddLowerPathIndexToRoutes.new.up

scripts/static-analysis

@@ -1,6 +1,29 @@
 #!/usr/bin/env ruby
 
-require ::File.expand_path('../lib/gitlab/popen', __dir__)
+# We don't have auto-loading here
+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 warnings:"
+    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:"
+    puts
+    puts result.stdout
+    puts result.stderr
+    puts
+  end
+end
 
 tasks = [
   %w[bundle exec rake config_lint],
@@ -17,18 +40,16 @@ tasks = [
   %w[scripts/lint-rugged]
 ]
 
-failed_tasks = tasks.reduce({}) do |failures, task|
-  start = Time.now
+static_analysis = Gitlab::Popen::Runner.new
+
+static_analysis.run(tasks) do |cmd, &run|
   puts
-  puts "$ #{task.join(' ')}"
+  puts "$ #{cmd.join(' ')}"
 
-  output, status = Gitlab::Popen.popen(task)
-  puts "==> Finished in #{Time.now - start} seconds"
+  result = run.call
+
+  puts "==> Finished in #{result.duration} seconds"
   puts
-
-  failures[task.join(' ')] = output unless status.zero?
-
-  failures
 end
 
 puts
@@ -36,17 +57,20 @@ puts '==================================================='
 puts
 puts
 
-if failed_tasks.empty?
+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
 else
   puts 'Some static analyses failed:'
 
-  failed_tasks.each do |failed_task, output|
-    puts
-    puts "**** #{failed_task} failed with the following error:"
-    puts
-    puts output
-  end
+  emit_warnings(static_analysis)
+  emit_errors(static_analysis)
 
   exit 1
 end

spec/lib/gitlab/popen/runner_spec.rb

@@ -0,0 +1,139 @@
+require 'spec_helper'
+
+describe Gitlab::Popen::Runner do
+  subject { described_class.new }
+
+  describe '#run' do
+    it 'runs the command and returns the result' do
+      run_command
+
+      expect(Gitlab::Popen).to have_received(:popen_with_detail)
+    end
+  end
+
+  describe '#all_success_and_clean?' do
+    it 'returns true when exit status is 0 and stderr is empty' do
+      run_command
+
+      expect(subject).to be_all_success_and_clean
+    end
+
+    it 'returns false when exit status is not 0' do
+      run_command(exitstatus: 1)
+
+      expect(subject).not_to be_all_success_and_clean
+    end
+
+    it 'returns false when exit stderr has something' do
+      run_command(stderr: 'stderr')
+
+      expect(subject).not_to be_all_success_and_clean
+    end
+  end
+
+  describe '#all_success?' do
+    it 'returns true when exit status is 0' do
+      run_command
+
+      expect(subject).to be_all_success
+    end
+
+    it 'returns false when exit status is not 0' do
+      run_command(exitstatus: 1)
+
+      expect(subject).not_to be_all_success
+    end
+
+    it 'returns true' do
+      run_command(stderr: 'stderr')
+
+      expect(subject).to be_all_success
+    end
+  end
+
+  describe '#all_stderr_empty?' do
+    it 'returns true when stderr is empty' do
+      run_command
+
+      expect(subject).to be_all_stderr_empty
+    end
+
+    it 'returns true when exit status is not 0' do
+      run_command(exitstatus: 1)
+
+      expect(subject).to be_all_stderr_empty
+    end
+
+    it 'returns false when exit stderr has something' do
+      run_command(stderr: 'stderr')
+
+      expect(subject).not_to be_all_stderr_empty
+    end
+  end
+
+  describe '#failed_results' do
+    it 'returns [] when everything is passed' do
+      run_command
+
+      expect(subject.failed_results).to be_empty
+    end
+
+    it 'returns the result when exit status is not 0' do
+      result = run_command(exitstatus: 1)
+
+      expect(subject.failed_results).to contain_exactly(result)
+    end
+
+    it 'returns [] when exit stderr has something' do
+      run_command(stderr: 'stderr')
+
+      expect(subject.failed_results).to be_empty
+    end
+  end
+
+  describe '#warned_results' do
+    it 'returns [] when everything is passed' do
+      run_command
+
+      expect(subject.warned_results).to be_empty
+    end
+
+    it 'returns [] when exit status is not 0' do
+      run_command(exitstatus: 1)
+
+      expect(subject.warned_results).to be_empty
+    end
+
+    it 'returns the result when exit stderr has something' do
+      result = run_command(stderr: 'stderr')
+
+      expect(subject.warned_results).to contain_exactly(result)
+    end
+  end
+
+  def run_command(
+    command: 'command',
+    stdout: 'stdout',
+    stderr: '',
+    exitstatus: 0,
+    status: double(exitstatus: exitstatus, success?: exitstatus.zero?),
+    duration: 0.1)
+
+    result =
+      Gitlab::Popen::Result.new(command, stdout, stderr, status, duration)
+
+    allow(Gitlab::Popen)
+      .to receive(:popen_with_detail)
+      .and_return(result)
+
+    subject.run([command]) do |cmd, &run|
+      expect(cmd).to eq(command)
+
+      cmd_result = run.call
+
+      expect(cmd_result).to eq(result)
+    end
+
+    subject.results.first
+  end
+end

spec/lib/gitlab/popen_spec.rb

@@ -1,11 +1,23 @@
 require 'spec_helper'
 
-describe 'Gitlab::Popen' do
+describe Gitlab::Popen do
   let(:path) { Rails.root.join('tmp').to_s }
 
   before do
     @klass = Class.new(Object)
-    @klass.send(:include, Gitlab::Popen)
+    @klass.send(:include, described_class)
+  end
+
+  describe '.popen_with_detail' do
+    subject { @klass.new.popen_with_detail(cmd) }
+
+    let(:cmd) { %W[#{Gem.ruby} -e $stdout.puts(1);$stderr.puts(2);exit(3)] }
+
+    it { expect(subject.cmd).to eq(cmd) }
+    it { expect(subject.stdout).to eq("1\n") }
+    it { expect(subject.stderr).to eq("2\n") }
+    it { expect(subject.status.exitstatus).to eq(3) }
+    it { expect(subject.duration).to be_kind_of(Numeric) }
   end
 
   context 'zero status' do

spec/support/javascript_fixtures_helpers.rb

@@ -1,6 +1,5 @@
 require 'action_dispatch/testing/test_request'
 require 'fileutils'
-require 'gitlab/popen'
 
 module JavaScriptFixturesHelpers
   include Gitlab::Popen

spec/tasks/gitlab/task_helpers_spec.rb

@@ -1,5 +1,4 @@
 require 'spec_helper'
-require 'tasks/gitlab/task_helpers'
 
 class TestHelpersTest
   include Gitlab::TaskHelpers