Enable more rules in SwiftLint's own .swiftlint.yml (realm#5532)

.sourcery/GeneratedTests.stencil

@@ -7,7 +7,7 @@ import SwiftLintTestHelpers
 
 {% for rule in types.structs %}
 {% if rule.name|hasSuffix:"Rule" %}
-class {{ rule.name }}GeneratedTests: SwiftLintTestCase {
+final class {{ rule.name }}GeneratedTests: SwiftLintTestCase {
     func testWithDefaultConfiguration() {
         verifyRule({{ rule.name }}.description)
     }

.swiftlint.yml

@@ -21,11 +21,9 @@ disabled_rules:
   - explicit_top_level_acl
   - explicit_type_interface
   - file_types_order
-  - final_test_case
   - force_unwrapping
   - function_default_parameter_at_end
   - implicit_return
-  - implicitly_unwrapped_optional
   - indentation_width
   - inert_defer
   - missing_docs
@@ -43,11 +41,8 @@ disabled_rules:
   - prefer_nimble
   - prefer_self_in_static_references
   - prefixed_toplevel_constant
-  - redundant_self_in_closure
   - required_deinit
-  - self_binding
   - static_over_final_class
-  - shorthand_argument
   - sorted_enum_cases
   - strict_fileprivate
   - switch_case_on_newline
@@ -84,7 +79,7 @@ balanced_xctest_lifecycle: &unit_test_configuration
     - XCTestCase
 empty_xctest_method: *unit_test_configuration
 single_test_class: *unit_test_configuration
-
+final_test_case: *unit_test_configuration
 function_body_length: 60
 type_body_length: 400
 

Source/SwiftLintBuiltInRules/Rules/Lint/ExpiringTodoRule.swift

@@ -59,8 +59,8 @@ struct ExpiringTodoRule: OptInRule {
                 syntaxKinds.allSatisfy({ $0.isCommentLike }),
                 checkingResult.numberOfRanges > 1,
                 case let range = checkingResult.range(at: 1),
-                let violationLevel = self.violationLevel(for: expiryDate(file: file, range: range)),
-                let severity = self.severity(for: violationLevel) else {
+                let violationLevel = violationLevel(for: expiryDate(file: file, range: range)),
+                let severity = severity(for: violationLevel) else {
                 return nil
             }
 

Source/SwiftLintBuiltInRules/Rules/Style/TypeContentsOrderRule.swift

@@ -69,7 +69,7 @@ struct TypeContentsOrderRule: OptInRule {
 
     private func typeContentOffsets(in typeStructure: SourceKittenDictionary) -> [TypeContentOffset] {
         return typeStructure.substructure.compactMap { typeContentStructure in
-            guard let typeContent = self.typeContent(for: typeContentStructure) else { return nil }
+            guard let typeContent = typeContent(for: typeContentStructure) else { return nil }
             return (typeContent, typeContentStructure.offset!)
         }
     }

Source/SwiftLintCore/Extensions/Configuration+FileGraphSubtypes.swift

@@ -95,8 +95,10 @@ internal extension Configuration.FileGraph {
 
     // MARK: - Edge
     struct Edge: Hashable {
+        // swiftlint:disable implicitly_unwrapped_optional
         var parent: Vertex!
         var child: Vertex!
+        // swiftlint:enable implicitly_unwrapped_optional
     }
 
     // MARK: - EdgeType

Source/SwiftLintCore/Models/Linter.swift

@@ -233,11 +233,11 @@ public struct CollectedLinter {
             $0 is SuperfluousDisableCommandRule
         }) as? SuperfluousDisableCommandRule
         let validationResults = rules.parallelCompactMap {
-            $0.lint(file: self.file, regions: regions, benchmark: benchmark,
+            $0.lint(file: file, regions: regions, benchmark: benchmark,
                     storage: storage,
-                    configuration: self.configuration,
+                    configuration: configuration,
                     superfluousDisableCommandRule: superfluousDisableCommandRule,
-                    compilerArguments: self.compilerArguments)
+                    compilerArguments: compilerArguments)
         }
         let undefinedSuperfluousCommandViolations = self.undefinedSuperfluousCommandViolations(
             regions: regions, configuration: configuration,
@@ -265,7 +265,7 @@ public struct CollectedLinter {
     }
 
     private func cachedStyleViolations(benchmark: Bool = false) -> ([StyleViolation], [(id: String, time: Double)])? {
-        let start: Date! = benchmark ? Date() : nil
+        let start = Date()
         guard let cache, let file = file.path,
             let cachedViolations = cache.violations(forFile: file, configuration: configuration) else {
             return nil

Source/SwiftLintCore/Models/RuleConfigurationDescription.swift

@@ -531,10 +531,7 @@ extension ConfigurationElement: AnyConfigurationElement {
 
 extension Optional: AcceptableByConfigurationElement where Wrapped: AcceptableByConfigurationElement {
     public func asOption() -> OptionType {
-        if let value = self {
-            return value.asOption()
-        }
-        return .empty
+        self?.asOption() ?? .empty
     }
 
     public init(fromAny value: Any, context ruleID: String) throws {

Source/SwiftLintCore/Reporters/SummaryReporter.swift

@@ -37,17 +37,17 @@ private extension TextTable {
         self.init(columns: columns)
 
         let ruleIdentifiersToViolationsMap = violations.group { $0.ruleIdentifier }
-        let sortedRuleIdentifiers = ruleIdentifiersToViolationsMap.keys.sorted {
-            let count1 = ruleIdentifiersToViolationsMap[$0]?.count ?? 0
-            let count2 = ruleIdentifiersToViolationsMap[$1]?.count ?? 0
+        let sortedRuleIdentifiers = ruleIdentifiersToViolationsMap.sorted { lhs, rhs in
+            let count1 = lhs.value.count
+            let count2 = rhs.value.count
             if count1 > count2 {
                 return true
             }
             if count1 == count2 {
-                return $0 < $1
+                return lhs.key < rhs.key
             }
             return false
-        }
+        }.map(\.key)
 
         var totalNumberOfWarnings = 0
         var totalNumberOfErrors = 0

Source/SwiftLintCore/RuleConfigurations/RegexConfiguration.swift

@@ -12,7 +12,7 @@ public struct RegexConfiguration<Parent: Rule>: SeverityBasedRuleConfiguration,
     public var message = "Regex matched"
     /// The regular expression to apply to trigger violations for this custom rule.
     @ConfigurationElement(key: "regex")
-    var regex: RegularExpression!
+    var regex: RegularExpression! // swiftlint:disable:this implicitly_unwrapped_optional
     /// Regular expressions to include when matching the file path.
     public var included: [NSRegularExpression] = []
     /// Regular expressions to exclude when matching the file path.

Source/swiftlint/Helpers/CompilerArgumentsExtractor.swift

@@ -88,22 +88,22 @@ extension Array where Element == String {
             (args, shouldContinueToFilterArguments) = partiallyFilter(arguments: args)
         }
 
-        return args.filter {
+        return args.filter { arg in
             ![
                 "-parseable-output",
                 "-incremental",
                 "-serialize-diagnostics",
                 "-emit-dependencies",
                 "-use-frontend-parseable-output"
-            ].contains($0)
-        }.map {
-            if $0 == "-O" {
+            ].contains(arg)
+        }.map { arg in
+            if arg == "-O" {
                 return "-Onone"
             }
-            if $0 == "-DNDEBUG=1" {
+            if arg == "-DNDEBUG=1" {
                 return "-DDEBUG=1"
             }
-            return $0
+            return arg
         }
     }
 }