Filter ruby lib directory from error backtrace

features/cli/error_reporting.feature

@@ -25,3 +25,8 @@ Feature: CLI error reporting
     Given a recipe using a remote
     When I execute the recipe on unknown remote target
     Then the output must not contain "net-ssh"
+
+  Scenario: excludes ruby standard library from backtrace
+    Given a recipe using a remote
+    When I execute the recipe on unknown remote target
+    Then the output must not contain ruby lib directory

features/steps/output_steps.rb

@@ -25,3 +25,7 @@ end
 Then /^the error output must contain exactly "([^"]+)"$/ do |content|
   assert_exact_output content, all_stderr
 end
+
+Then /^the output must not contain ruby lib directory$/ do
+  assert_no_partial_output RbConfig::CONFIG['rubylibdir'], all_output
+end

lib/producer/core/error_formatter.rb

@@ -3,6 +3,7 @@ module Producer
     class ErrorFormatter
       FILTERS = [
         /\/producer-\w+/,
+        Regexp.new(RbConfig::CONFIG['rubylibdir']),
         /\/net-ssh/,
         /\/net-sftp/
       ].freeze

spec/producer/core/error_formatter_spec.rb

@@ -23,7 +23,8 @@ module Producer
       end
 
       describe '#format' do
-        let(:bt) { %W[backtrace /producer-core /net-ssh] }
+        let(:rubylibdir)  { RbConfig::CONFIG['rubylibdir'] }
+        let(:bt)          { %W[backtrace /producer-core /net-ssh #{rubylibdir}] }
 
         def exception
           begin fail 'original exception' rescue fail 'some exception' end
@@ -49,6 +50,10 @@ module Producer
             expect(formatter.format exception).not_to include 'net-ssh'
           end
 
+          it 'excludes ruby lib directory from the backtrace' do
+            expect(formatter.format exception).not_to include rubylibdir
+          end
+
           context 'when debug is enabled' do
             let(:debug) { true }