AWS CloudFormation Linter

Unreachable code can be safely removedKT-W1065 The property can be declared as `const`KT-P1001 Iterator implementation does not throw `NoSuchElementException`KT-W1033 Unreachable catch blocks must be removedKT-W1064 Avoid using `forEach` with rangesKT-P1000 Non-compliant class/object name detectedKT-C1000 Checked cast can be replaced with a safe castKT-E1004 Catch block should not require to check or cast the type of exception via `is` or `as`KT-W1000 The range specified for iteration is emptyKT-W1031 Calling `hasNext()` on an `Iterator` should not have any side-effectsKT-W1032 Declaration of `serialVersionUID` not foundKT-W1060 The class overrides `equals` but not `hashCode`KT-W1028 `null` comparison using `equals` methodKT-W1049 Map values fetched with not-null assertion operatorKT-W1034 Non-compliant enum variant name detectedKT-C1001 Exceptions should not be rethrown after being wrapped in a new instance of the same typeKT-W1008 Avoid explicitly triggering garbage collectionKT-W1029 Avoid using `GlobalScope` to launch coroutinesKT-E1001 Avoid casting to nullable types using `as`KT-E1002 `equals` should be overridden correctlyKT-E1003 Proper logging should be preferred over printing stack trace of exceptionsKT-W1002 Caught exceptions must not be rethrownKT-W1003 Ensure exceptions that are caught are actually handledKT-W1005 Avoid catching overly generic exceptionsKT-W1009 `equals` method always returns the same resultKT-W1027 Loop with unconditional jump statementsKT-W1035 File location does not match the declared packageKT-W1044 Found shadowed variable declarationKT-W1045 Found usages of `lateinit` modifierKT-W1047 Method should not throw exceptionsKT-W1056 Don't throw `IllegalArgumentException` manually, use `require()` insteadKT-W1057 The class can be declared as a data classKT-W1058 Unused parameters should be removedKT-W1061 Avoid casting nullable types to non-null typesKT-E1006 Avoid casting immutable collection types to mutable collection typesKT-E1007 Avoid not-null assertions with `!!`KT-E1010 Inner class can be a static nested classKT-R1001 Variables that can be non-nullable should not be marked as nullableKT-W1070 Found type cast that will never succeedKT-E1011 Blocking operations should be avoided in coroutinesKT-E1012 Redundant `filter()` calls should be removedKT-W1073 Abstract class should be refactored into either an interface or concrete classKT-R1000 Avoid suspend function calls in `runCatching`KT-W1066 Function must not return from a `finally` blockKT-W1069 Prefer usage of `Unit` over `Void`KT-W1071 Redundant `map()` calls should be removedKT-W1072 Extensive `let` usage should be replaced with ordinary method or extension function callKT-W1074 Functions with only the `return` statement should be rewritten with expression body syntaxKT-W1051 Found `if` statements that can be collapsed into oneKT-W1048 Unnecessary `abstract` modifier in interface detectedKT-W1054 Found function that only returns a constantKT-W1052 Redundant use of `?.` detectedKT-W1063 Found duplicate condition in binary expressionKT-W1043 Detected member with `protected` visibility in `final` classKT-W1055 Multiple occurrences of the same string literal within a single file detectedKT-W1042 Declaring lambda parameters as `it` is redundantKT-W1050 Array literals must be used instead of `arrayOf()`KT-W1059 Return values must not be ignoredKT-E1008 Explicit `public` modifiers on nested classes have no effectKT-W1053 Redundant use of `!!` detectedKT-W1062 Avoid referential equality test for stringsKT-E1005 Prefer `to` over `Pair` syntaxKT-C1002 `toString()` must not be called on a nullable objectKT-E1009 Detected `?: emptyList()` that can be replaced with `orEmpty()` callKT-R1004 Detected `require` calls for not-null check that can be replaced with `requireNotNull`KT-R1005 Functions that return a Flow instance should not be marked as `suspend`KT-W1068 Detected `isEmpty` or `isBlank` calls to assign a default valueKT-R1002 Detected null or empty check that can be replaced with `isNullOrEmpty()`KT-R1003 Functions that have `CoroutineScope` as receiver should not be marked as `suspend`KT-W1067 Ensure all APIs are implementedKT-W1001 Avoid throwing exceptions within `finally` blocksKT-W1010 Method should not return from finally blocksKT-W1004 The main method should not throw exceptionsKT-W1007 The result of increment/decrement operation is unusedKT-W1036 Array constructors should be preferred over the spread operatorKT-P1004 Creation of temporary objects when converting primitive types to `String`KT-P1002 Detected the use of forbidden commentsKT-D1000 Having empty blocks in the code is redundantKT-W1012 Implicit default locale used for string processingKT-W1030 Function with cyclomatic complexity higher than threshold foundKT-R1006 Specialized primitive array classes should be preferred over `Array<Primitive>`KT-P1003

Kotlin

Static Analysis, SAST, Code Coverage, Code Complexity

Sample Configuration

.deepsource.toml

version = 1

[[analyzers]]
name = "kotlin"

  [analyzers.meta]
  language_version = "1.8"
  runtime_version = "17"

Explore the docs for all configuration options.