From 2eaa60e4555bb11ad5c0af905217f0fa61cf7cc9 Mon Sep 17 00:00:00 2001
From: GitLab Bot <gitlab-bot@gitlab.com>
Date: Thu, 26 Nov 2020 15:09:30 +0000
Subject: Add latest changes from gitlab-org/gitlab@master

---
 tooling/bin/parallel_rspec                   | 19 +++++++
 tooling/lib/tooling/parallel_rspec_runner.rb | 78 ++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100755 tooling/bin/parallel_rspec
 create mode 100644 tooling/lib/tooling/parallel_rspec_runner.rb

(limited to 'tooling')

diff --git a/tooling/bin/parallel_rspec b/tooling/bin/parallel_rspec
new file mode 100755
index 00000000000..a706df69a1e
--- /dev/null
+++ b/tooling/bin/parallel_rspec
@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'optparse'
+require_relative '../lib/tooling/parallel_rspec_runner'
+
+options = {}
+
+OptionParser.new do |opts|
+  opts.on("--rspec_args rspec_args", String, "Optional rspec arguments") do |value|
+    options[:rspec_args] = value
+  end
+
+  opts.on("--filter filter_tests_file", String, "Optional filename containing tests to be filtered") do |value|
+    options[:filter_tests_file] = value
+  end
+end.parse!
+
+Tooling::ParallelRSpecRunner.run(options)
diff --git a/tooling/lib/tooling/parallel_rspec_runner.rb b/tooling/lib/tooling/parallel_rspec_runner.rb
new file mode 100644
index 00000000000..443da55a978
--- /dev/null
+++ b/tooling/lib/tooling/parallel_rspec_runner.rb
@@ -0,0 +1,78 @@
+# frozen_string_literal: true
+
+require 'knapsack'
+
+# A custom parallel rspec runner based on Knapsack runner
+# which takes in additional option for a file containing
+# list of test files.
+#
+# When executing RSpec in CI, the list of tests allocated by Knapsack
+# will be compared with the test files listed in the file.
+#
+# Only the test files allocated by Knapsack and listed in the file
+# would be executed in the CI node.
+module Tooling
+  class ParallelRSpecRunner
+    def self.run(rspec_args: nil, filter_tests_file: nil)
+      new(rspec_args: rspec_args, filter_tests_file: filter_tests_file).run
+    end
+
+    def initialize(allocator: knapsack_allocator, filter_tests_file: nil, rspec_args: nil)
+      @allocator = allocator
+      @filter_tests_file = filter_tests_file
+      @rspec_args = rspec_args&.split(' ') || []
+    end
+
+    def run
+      Knapsack.logger.info
+      Knapsack.logger.info 'Knapsack node specs:'
+      Knapsack.logger.info node_tests
+      Knapsack.logger.info
+      Knapsack.logger.info 'Filter specs:'
+      Knapsack.logger.info filter_tests
+      Knapsack.logger.info
+      Knapsack.logger.info 'Running specs:'
+      Knapsack.logger.info tests_to_run
+      Knapsack.logger.info
+
+      exec(*rspec_command)
+    end
+
+    private
+
+    attr_reader :allocator, :filter_tests_file, :rspec_args
+
+    def rspec_command
+      %w[bundle exec rspec].tap do |cmd|
+        cmd.push(*rspec_args)
+        cmd.push('--default-path', allocator.test_dir)
+        cmd.push('--')
+        cmd.push(*tests_to_run)
+      end
+    end
+
+    def tests_to_run
+      return node_tests if filter_tests.empty?
+
+      node_tests & filter_tests
+    end
+
+    def node_tests
+      allocator.node_tests
+    end
+
+    def filter_tests
+      filter_tests_file ? tests_from_file(filter_tests_file) : []
+    end
+
+    def tests_from_file(filter_tests_file)
+      return [] unless File.exist?(filter_tests_file)
+
+      File.read(filter_tests_file).split(' ')
+    end
+
+    def knapsack_allocator
+      Knapsack::AllocatorBuilder.new(Knapsack::Adapters::RSpecAdapter).allocator
+    end
+  end
+end
-- 
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