Add --nice flag

.rubocop_gradual.lock

@@ -25,14 +25,14 @@
   "lib/turbo_tests/reporter.rb:1386902608": [
     [7, 5, 400, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 2092085575]
   ],
-  "lib/turbo_tests/runner.rb:1170052458": [
+  "lib/turbo_tests/runner.rb:1092969829": [
     [13, 5, 271, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 21989008],
-    [20, 5, 1253, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 1925027850],
-    [211, 11, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [229, 47, 6, "Style/GlobalStdStream: Use `$stderr` instead of `STDERR`.", 3356712163],
-    [231, 21, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [240, 7, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [300, 9, 6, "Style/GlobalStdStream: Use `$stdout` instead of `STDOUT`.", 3356722952]
+    [20, 5, 1311, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 1925027850],
+    [216, 11, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [234, 47, 6, "Style/GlobalStdStream: Use `$stderr` instead of `STDERR`.", 3356712163],
+    [236, 21, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [245, 7, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [305, 9, 6, "Style/GlobalStdStream: Use `$stdout` instead of `STDOUT`.", 3356722952]
   ],
   "spec/cli_spec.rb:3990998076": [
     [1, 1, 30, "RSpec/SpecFilePathFormat: Spec path should end with `turbo_tests/cli*_spec.rb`.", 965721356],

lib/turbo_tests/cli.rb

@@ -19,6 +19,7 @@ def run
       seed = nil
       print_failed_group = false
       create = false
+      nice = false
 
       OptionParser.new do |opts|
         opts.banner = <<~BANNER
@@ -95,6 +96,10 @@ def run
         opts.on("--print_failed_group", "Prints group that had failures in it") do
           print_failed_group = true
         end
+
+        opts.on("--nice", "execute test commands with low priority") do
+          nice = true
+        end
       end.parse!(@argv)
 
       if create
@@ -126,6 +131,7 @@ def run
         fail_fast: fail_fast,
         count: count,
         seed: seed,
+        nice: nice,
         print_failed_group: print_failed_group,
         parallel_options: parallel_options,
       )

lib/turbo_tests/runner.rb

@@ -31,6 +31,7 @@ def self.run(opts = {})
       seed = opts.fetch(:seed, nil)
       seed_used = !seed.nil?
       print_failed_group = opts.fetch(:print_failed_group, false)
+      nice = opts.fetch(:nice, false)
 
       use_runtime_info = files == ["spec"]
 
@@ -57,6 +58,7 @@ def self.run(opts = {})
         print_failed_group: print_failed_group,
         use_runtime_info: use_runtime_info,
         parallel_options: parallel_options,
+        nice: nice,
       ).run
     end
 
@@ -69,6 +71,7 @@ def initialize(opts)
       @count = opts[:count]
       @seed = opts[:seed]
       @seed_used = opts[:seed_used]
+      @nice = opts[:nice]
       @use_runtime_info = opts[:use_runtime_info]
 
       @load_time = 0
@@ -194,6 +197,8 @@ def start_subprocess(env, extra_args, tests, process_id, record_runtime:)
           *record_runtime_options,
           *tests,
         ]
+        command.unshift(ENV["BUNDLE_BIN_PATH"], "exec") if ENV["BUNDLE_BIN_PATH"]
+        command.unshift("nice") if @nice
 
         if @verbose
           command_str = [