Use syntax check script instead

.gitlab-ci.yml

@@ -10,7 +10,7 @@ ruby_2.1:
     - ruby
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby -c {}"
+    - ruby scheck.rb
 
 ruby_2.2:
   image: ruby:2.2
@@ -21,7 +21,7 @@ ruby_2.2:
     - master
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby -c {}"
+    - ruby scheck.rb
 
 ruby_2.3:
   image: ruby:2.3
@@ -32,7 +32,7 @@ ruby_2.3:
     - master
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby -c {}"
+    - ruby scheck.rb
 
 ruby_2.4:
   image: ruby:2.4
@@ -43,7 +43,7 @@ ruby_2.4:
     - master
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby -c {}"
+    - ruby scheck.rb
 
 jruby_1.7:
   image: jruby:1.7
@@ -54,7 +54,7 @@ jruby_1.7:
     - master
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby --dev -c {}"
+    - ruby --dev scheck.rb
 
 jruby_9.1:
   image: jruby:9.1
@@ -65,7 +65,7 @@ jruby_9.1:
     - master
   script:
     - ruby -v
-    - find . -name "*\.rb" -print0 | xargs -I {} -0 -n1 sh -c "ls {}; ruby --dev -c {}"
+    - ruby --dev scheck.rb
 
 rubocop:
   stage: linting

scheck.rb

+#!/usr/bin/env ruby
+
+ret = 0
+Dir["**/*.rb"].each do |f|
+  res = %x(ruby -c #{f})
+  if res.empty?
+    ret = 1
+    puts "#{f} FAILED!"
+  else
+    puts "#{f.ljust(30)} #{res.rjust(30)}"
+  end
+end
+
+exit ret
+