Enable multiple compatible Rubocop cops

Closes #17406

.rubocop.yml

@@ -59,7 +59,7 @@ Style/AndOr:
 # Use `Array#join` instead of `Array#*`.
 Style/ArrayJoin:
-  Enabled: false
+  Enabled: true
 # Use only ascii symbols in comments.
 Style/AsciiComments:
@@ -71,7 +71,7 @@ Style/AsciiIdentifiers:
 # Checks for uses of Module#attr.
 Style/Attr:
-  Enabled: false
+  Enabled: true
 # Avoid the use of BEGIN blocks.
 Style/BeginBlock:
@@ -83,7 +83,7 @@ Style/BarePercentLiterals:
 # Do not use block comments.
 Style/BlockComments:
-  Enabled: false
+  Enabled: true
 # Put end statement of multiline block on its own line.
 Style/BlockEndNewline:
@@ -124,7 +124,7 @@ Style/ClassCheck:
 # Use self when defining module/class methods.
 Style/ClassMethods:
-  Enabled: false
+  Enabled: true
 # Avoid the use of class variables.
 Style/ClassVars:
@@ -218,7 +218,7 @@ Style/EmptyLiteral:
 # Avoid the use of END blocks.
 Style/EndBlock:
-  Enabled: false
+  Enabled: true
 # Use Unix-style line endings.
 Style/EndOfLine:
@@ -226,7 +226,7 @@ Style/EndOfLine:
 # Favor the use of Fixnum#even? && Fixnum#odd?
 Style/EvenOdd:
-  Enabled: false
+  Enabled: true
 # Do not use unnecessary spacing.
 Style/ExtraSpacing:
@@ -234,11 +234,16 @@ Style/ExtraSpacing:
 # Use snake_case for source file names.
 Style/FileName:
-  Enabled: false
+  Enabled: true
+
+# Checks for a line break before the first parameter in a multi-line method
+#   parameter definition.
+Style/FirstMethodParameterLineBreak:
+  Enabled: true
 # Checks for flip flops.
 Style/FlipFlop:
-  Enabled: false
+  Enabled: true
 # Checks use of for or each in multiline loops.
 Style/For:
@@ -250,7 +255,7 @@ Style/FormatString:
 # Do not introduce global variables.
 Style/GlobalVars:
-  Enabled: false
+  Enabled: true
 # Check for conditionals that can be replaced with guard clauses.
 Style/GuardClause:
@@ -271,7 +276,7 @@ Style/IfUnlessModifier:
 # Do not use if x; .... Use the ternary operator instead.
 Style/IfWithSemicolon:
-  Enabled: false
+  Enabled: true
 # Checks that conditional statements do not have an identical line at the
 # end of each branch, which can validly be moved out of the conditional.
@@ -309,7 +314,7 @@ Style/Lambda:
 # Use lambda.call(...) instead of lambda.(...).
 Style/LambdaCall:
-  Enabled: false
+  Enabled: true
 # Comments should start with a space.
 Style/LeadingCommentSpace:
@@ -329,7 +334,7 @@ Style/MethodDefParentheses:
 # Use the configured style when naming methods.
 Style/MethodName:
-  Enabled: false
+  Enabled: true
 # Checks for usage of `extend self` in modules.
 Style/ModuleFunction:
@@ -370,6 +375,11 @@ Style/MultilineMethodCallBraceLayout:
 Style/MultilineMethodCallIndentation:
   Enabled: false
+# Checks that the closing brace in a method definition is symmetrical with
+# respect to the opening brace and the method parameters.
+Style/MultilineMethodDefinitionBraceLayout:
+  Enabled: false
+
 # Checks indentation of binary operations that span more than one line.
 Style/MultilineOperationIndentation:
   Enabled: false
@@ -392,7 +402,7 @@ Style/NegatedWhile:
 # Avoid using nested modifiers.
 Style/NestedModifier:
-  Enabled: false
+  Enabled: true
 # Parenthesize method calls which are nested inside the argument list of
 # another parenthesized method call.
@@ -429,7 +439,7 @@ Style/OneLineConditional:
 # When defining binary operators, name the argument other.
 Style/OpMethod:
-  Enabled: false
+  Enabled: true
 # Check for simple usages of parallel assignment. It will only warn when
 # the number of variables matches on both sides of the assignment.
@@ -509,7 +519,8 @@ Style/Semicolon:
 # Checks for proper usage of fail and raise.
 Style/SignalException:
-  Enabled: false
+  EnforcedStyle: only_raise
+  Enabled: true
 # Enforces the names of some block params.
 Style/SingleLineBlockParams:
@@ -534,11 +545,11 @@ Style/SpaceAfterMethodName:
 # Tracks redundant space after the ! operator.
 Style/SpaceAfterNot:
-  Enabled: false
+  Enabled: true
 # Use spaces after semicolons.
 Style/SpaceAfterSemicolon:
-  Enabled: false
+  Enabled: true
 # Checks that the equals signs in parameter default assignments have or don't
 # have surrounding space depending on configuration.
@@ -572,7 +583,7 @@ Style/SpaceBeforeFirstArg:
 # No spaces before semicolons.
 Style/SpaceBeforeSemicolon:
-  Enabled: false
+  Enabled: true
 # Checks that block braces have or don't have surrounding space.
 # For blocks taking parameters, checks that the left brace has or doesn't
@@ -594,11 +605,12 @@ Style/SpaceInsideParens:
 # No spaces inside range literals.
 Style/SpaceInsideRangeLiteral:
-  Enabled: false
+  Enabled: true
 # Checks for padding/surrounding spaces inside string interpolation.
 Style/SpaceInsideStringInterpolation:
-  Enabled: false
+  EnforcedStyle: no_space
+  Enabled: true
 # Avoid Perl-style global variables.
 Style/SpecialGlobalVars:
@@ -606,7 +618,8 @@ Style/SpecialGlobalVars:
 # Check for the usage of parentheses around stabby lambda arguments.
 Style/StabbyLambdaParentheses:
-  Enabled: false
+  EnforcedStyle: require_parentheses
+  Enabled: true
 # Checks if uses of quotes match the configured preference.
 Style/StringLiterals:
@@ -619,7 +632,9 @@ Style/StringLiteralsInInterpolation:
 # Checks if configured preferred methods are used over non-preferred.
 Style/StringMethods:
-  Enabled: false
+  PreferredMethods:
+    intern: to_sym
+  Enabled: true
 # Use %i or %I for arrays of symbols.
 Style/SymbolArray:
@@ -677,15 +692,16 @@ Style/UnneededPercentQ:
 # Don't interpolate global, instance and class variables directly in strings.
 Style/VariableInterpolation:
-  Enabled: false
+  Enabled: true
 # Use the configured style when naming variables.
 Style/VariableName:
-  Enabled: false
+  EnforcedStyle: snake_case
+  Enabled: true
 # Use when x then ... for one-line cases.
 Style/WhenThen:
-  Enabled: false
+  Enabled: true
 # Checks for redundant do after while or until.
 Style/WhileUntilDo:
@@ -693,7 +709,7 @@ Style/WhileUntilDo:
 # Favor modifier while/until usage when you have a single-line body.
 Style/WhileUntilModifier:
-  Enabled: false
+  Enabled: true
 # Use %w or %W for arrays of words.
 Style/WordArray:

lib/ci/gitlab_ci_yaml_processor.rb

 module Ci
   class GitlabCiYamlProcessor
-    class ValidationError < StandardError;end
+    class ValidationError < StandardError; end
     DEFAULT_STAGES = %w(build test deploy)
     DEFAULT_STAGE = 'test'