Remove CI specific jobs default

[fix #501]

Changelog.md

@@ -1,6 +1,7 @@
 # v0.8.8 2015-xx-xx
 
 * Drop support for rspec-3.2
+* Remove CI specific job number default
 
 # v0.8.8 2015-11-15
 

Rakefile

@@ -6,18 +6,21 @@ Rake.application.load_imports
 
 task('metrics:mutant').clear
 namespace :metrics do
-  task :mutant => :coverage do
-    success = Kernel.system(*%w[
+  task mutant: :coverage do
+    arguments = %w[
       bundle exec mutant
-      --zombie
-      --use rspec
-      --include lib
-      --require mutant
-      --since HEAD~1
       --ignore-subject Mutant::Meta*
-      --
-      Mutant*
-    ]) or fail 'Mutant task is not successful'
+      --include lib
+      --since HEAD~1
+      --require mutant
+      --use rspec
+      --zombie
+    ]
+    arguments.concat(%W[--jobs 4]) if ENV.key?('CIRCLE_CI')
+
+    arguments.concat(%w[-- Mutant*])
+
+    success = Kernel.system(*arguments) or fail 'Mutant task is not successful'
   end
 end
 

lib/mutant.rb

@@ -188,8 +188,6 @@ require 'mutant/zombifier'
 module Mutant
   # Reopen class to initialize constant to avoid dep circle
   class Config
-    CI_DEFAULT_PROCESSOR_COUNT = 4
-
     DEFAULT = new(
       debug:             false,
       expected_coverage: Rational(1),
@@ -203,7 +201,7 @@ module Mutant
       includes:          EMPTY_ARRAY,
       integration:       Integration::Null,
       isolation:         Mutant::Isolation::Fork,
-      jobs:              Mutant.ci? ? CI_DEFAULT_PROCESSOR_COUNT : ::Parallel.processor_count,
+      jobs:              ::Parallel.processor_count,
       matcher:           Matcher::Config::DEFAULT,
       requires:          EMPTY_ARRAY,
       reporter:          Reporter::CLI.build($stdout),