All notable changes to this project will be documented in this file. This project adheres to Semantic Versioning.
- Add
.editorconfig
propertyktlint_function_naming_ignore_when_annotated_with
so that rulefunction-naming
can be ignored based on annotations on that rule. See function-naming. - Add new experimental rule
multiline-loop
rule - #2298, by @hendraanggrian
- Remove obsolete idea configuration files #2249
- Use Java 21 for compilation #2319
1.0.1 - 2023-10-13
- Add
.editorconfig
propertyktlint_function_naming_ignore_when_annotated_with
so that rulefunction-naming
can be ignored based on annotations on that rule. See function-naming.
-
Update badge for Maven Central - #2245, by @Goooler
-
Fix code style parameter in cli - #2241, by @paul-dingemans
-
Anonymous function in assignment - #2263, by @paul-dingemans
-
Fix indent of multiline object declaration inside class - #2266, by @paul-dingemans
-
Do not replace function body with multiple exit points - #2273, by @paul-dingemans
-
Ignore override of function in rule
function-naming
- #2274, by @paul-dingemans -
Suppress
function-naming
based on annotations - #2275, by @paul-dingemans -
Force blank line before object declaration - #2287, by @paul-dingemans
-
Multiline expression wrapping - #2290, by @paul-dingemans
-
Ignore function naming in Kotest classes - #2291, by @paul-dingemans
-
Improve violation message in
discouraged-comment-location
- #2293, by @paul-dingemans -
Fix malformed AST when
&&
or||
is at start of linechain-wrapping
- #2300, by @paul-dingemans -
Do not report false positives
type-argument-list-spacing
andtype-parameter-list-spacing
- #2303, by @paul-dingemans -
Fix chain method continuation containing higher order function call - #2305, by @paul-dingemans
-
Update dependency io.github.detekt.sarif4k:sarif4k to v0.5.0 - #2277, by @renovate[bot]
-
Update dependency gradle to v8.4 - #2294, by @renovate[bot]
-
Update actions/checkout action to v4 - #2225, by @renovate[bot]
-
Update actions/checkout digest to 8ade135 - #2295, by @renovate[bot]
- Simple property assignments in KTS - #2123, by @Goooler
1.0.0 - 2023-09-05
-
Update and align Maven coordinates - #2195, by @paul-dingemans
Be sure to update Maven coordinates below, to get latest changes!Old Maven coordinates New Maven coordinates com.pinterest.ktlint com.pinterest.ktlint:ktlint-cli com.pinterest.ktlint:ktlint-reporter-baseline com.pinterest.ktlint:ktlint-cli-reporter-baseline com.pinterest.ktlint:ktlint-reporter-checkstyle com.pinterest.ktlint:ktlint-cli-reporter-checkstyle com.pinterest.ktlint:ktlint-cli-reporter com.pinterest.ktlint:ktlint-cli-reporter-core com.pinterest.ktlint:ktlint-reporter-format com.pinterest.ktlint:ktlint-cli-reporter-format com.pinterest.ktlint:ktlint-reporter-html com.pinterest.ktlint:ktlint-cli-reporter-html com.pinterest.ktlint:ktlint-reporter-json com.pinterest.ktlint:ktlint-cli-reporter-json com.pinterest.ktlint:ktlint-reporter-plain com.pinterest.ktlint:ktlint-cli-reporter-plain com.pinterest.ktlint:ktlint-reporter-plain-summary com.pinterest.ktlint:ktlint-cli-reporter-plain-summary com.pinterest.ktlint:ktlint-reporter-sarif com.pinterest.ktlint:ktlint-cli-reporter-sarif -
Add binary compatibility validator - #2131, by @mateuszkwiecinski
-
Replace kotlin public
data class
es with Poko compiler plugin generated ones - #2136, by @mateuszkwiecinski
As a part of public API stabilization, data classes are no longer used in the public API. As of that, functions likecopy()
orcomponentN()
(used for destructuring declarations) are not available anymore. -
Promote experimental rules - #2218, by @paul-dingemans
The rules below have been promoted to non-experimental rules:- blank-line-before-declaration
- context-receiver-wrapping
- discouraged-comment-location
- enum-wrapping
- function-naming
- function-signature
- if-else-bracing
- multiline-expression-wrapping
- if-else-wrapping
- no-blank-line-in-list
- no-consecutive-comments
- no-empty-file
- no-empty-first-line-in-class-body
- no-single-line-block-comment
- parameter-list-spacing
- property-naming
- statement-wrapping
- string-template-indent
- try-catch-finally-spacing
- type-argument-list-spacing
- type-parameter-list-spacing
- unnecessary-parentheses-before-trailing-lambda
-
Fix statement-wrapping and align rule classes - #2178, by @paul-dingemans
Rule classMultilineExpressionWrapping
has been renamed toMultilineExpressionWrappingRule
. Rule classStatementWrapping
has been renamed toStatementWrappingRule
.RULE_ID
constants below are moved to a different Java class at compile time. Each rule provided by Ktlint is to be accompanied by aRULE_ID
constant that can be used in theVisitorModifier.RunAfter
. Filenames did not comply with standard that it should end withRule
suffix.RULE ID Old Java class name New Java class name FUNCTION_EXPRESSION_BODY_RULE_ID
FunctionExpressionBodyKt FunctionExpressionBodyRuleKt FUNCTION_LITERAL_RULE_ID
FunctionLiteralKt FunctionLiteralRuleKt MULTILINE_EXPRESSION_WRAPPING_RULE_ID
MultilineExpressionWrappingKt MultilineExpressionWrappingRuleKt NO_BLANK_LINE_IN_LIST_RULE_ID
NoBlankLineInListKt NoBlankLineInListRuleKt NO_EMPTY_FILE_RULE_ID
(not applicable) NoEmptyFileRuleKt -
Update to Kotlin 1.9 & remove TreeCopyHandler extension - #2113, by @paul-dingemans
Classorg.jetbrains.kotlin.com.intellij.treeCopyHandler
is no longer registered as extension point for the compiler as this is not supported in Kotlin 1.9. Please test your custom rules. In case of unexpected exceptions during formatting of code, see #2044 for possible remediation.
-
Change default code style to
ktlint_official
- #2144, by @paul-dingemans -
Add new experimental rule
class-signature
- #2119, by @paul-dingemans -
Add new experimental rule
function-expression-body
- #2151, by @paul-dingemans -
Add new experimental rule
chain-method-continuation
- #2088, by @atulgpt -
Add new experimental rule
function-literal
- #2137, by @paul-dingemans -
Add new experimental rule
function-type-modifier-spacing
rule - #2216, by @t-kameyama -
Define
EditorConfigOverride
for dynamically loaded ruleset - #2194, by @paul-dingemans TheEditorConfigOverride
parameter of theKtlintRuleEngine
can be defined using the factory methodEditorConfigOverride.from(vararg properties: Pair<EditorConfigProperty<*>, *>)
. This requires theEditorConfigProperty
's to be available at compile time. Some commonEditorConfigProperty
's are defined inktlint-rule-engine-core
which is loaded as transitive dependency ofktlint-rule-engine
and as of that are available at compile. If anEditorConfigProperty
is defined in aRule
that is only provided via a runtime dependency, it gets a bit more complicated. Thektlint-api-consumer
example has now been updated to show how theEditorConfigProperty
can be retrieved from theRule
. -
Move wrapping on semicolon from
wrapping
rule tostatement-wrapping
rule - #2222, by @paul-dingemans
-
Do not indent class body for classes having a long super type list - #2116, by @paul-dingemans
-
Fix indent of explicit constructor - #2118, by @paul-dingemans
-
Fix incorrect formatting of nested function literal - #2107, by @paul-dingemans
-
Add property to disable ktlint for a glob in
.editorconfig
- #2108, by @paul-dingemans -
Fix spacing around colon in annotations - #2126, by @paul-dingemans
-
Fix solving problems in 3 consecutive runs - #2132, by @paul-dingemans
-
Fix indent parenthesized expression - #2127, by @paul-dingemans
-
Fix indent of IS_EXPRESSION, PREFIX_EXPRESSION and POSTFIX_EXPRESSION - #2125, by @paul-dingemans
-
Do not wrap a binary expression after an elvis operator - #2134, by @paul-dingemans
-
Drop obsolete class LintError in ktlint-api-consumer - #2145, by @paul-dingemans
-
Fix null pointer exception for if-else statement with empty THEN block - #2142, by @paul-dingemans
-
Fix false positive in property-naming - #2141, by @paul-dingemans
-
Store relative path of file in baseline file - #2147, by @paul-dingemans
-
Fix url of build status badge - #2162, by @paul-dingemans
-
Update CONTRIBUTING.md - #2163, by @oshai
-
Fix statement-wrapping and align rule classes - #2178, by @paul-dingemans
-
Fix alignment of type constraints after
where
keyword in function - #2180, by @paul-dingemans -
Fix wrapping of multiline postfix expression - #2184, by @paul-dingemans
-
Do not wrap expression after a spread operator - #2193, by @paul-dingemans
-
Do not remove parenthesis after explicit class constructor without arguments - #2226, by @paul-dingemans
-
Fix conflict between rules due to annotated super type call - #2227, by @paul-dingemans
-
Fix indentation of super type list of class in case it is preceded by a comment - #2228, by @paul-dingemans
-
Super type list starting with an annotation having a parameters - #2230, by @paul-dingemans
-
Do not wrap values in a single line enum when it is preceded by a comment or an annotation - #2229, by @paul-dingemans
-
Update dependency org.codehaus.janino:janino to v3.1.10 - #2110, by @renovate[bot]
-
Update dependency com.google.jimfs:jimfs to v1.3.0 - #2112, by @renovate[bot]
-
Update dependency org.junit.jupiter:junit-jupiter to v5.10.0 - #2148, by @renovate[bot]
-
Update dependency io.github.oshai:kotlin-logging-jvm to v5.1.0 - #2174, by @renovate[bot]
-
Update dependency dev.drewhamilton.poko:poko-gradle-plugin to v0.15.0 - #2173, by @renovate[bot]
-
Update plugin org.gradle.toolchains.foojay-resolver-convention to v0.7.0 - #2187, by @renovate[bot]
-
Update dependency gradle to v8.3 - #2186, by @renovate[bot]
-
Update kotlin monorepo to v1.9.10 - #2197, by @renovate[bot]
-
Update dependency info.picocli:picocli to v4.7.5 - #2215, by @renovate[bot]
-
Update dependency org.jetbrains.dokka:dokka-gradle-plugin to v1.9.0 - #2221, by @renovate[bot]
-
Update dependency org.slf4j:slf4j-simple to v2.0.9 - #2224, by @renovate[bot]
-
Setup toolchains, compile project with Java 20 only, run test on various Java versions - #2120, by @mateuszkwiecinski
-
Add release-changelog-builder-action to temporary workflow - #2196, by @paul-dingemans
0.50.0 - 2023-06-29
The ktlint-disable
and ktlint-enable
directives are no longer supported. Ktlint rules can now only be suppressed using the @Suppress
or @SuppressWarnings
annotations. A new rule, internal:ktlint-suppression
, is provided to replace the directives with annotations.
API consumers do not need to provide this rule, but it does no harm when done.
The internal:ktlint-suppression
rule can not be disabled via the .editorconfig
nor via @Suppress
or @SuppressWarnings
annotations.
In Kotlin 1.9 the extension points of the embedded kotlin compiler will change. Ktlint only uses the org.jetbrains.kotlin.com.intellij.treeCopyHandler
extension point. This extension is not yet supported in 1.9, neither is it documented (#KT-58704). Without this extension point it might happen that your custom rules will throw exceptions during runtime. See #1981.
In Ktlint, 7 out of 77 rules needed small and sometimes bigger changes to become independent of the extension point org.jetbrains.kotlin.com.intellij.treeCopyHandler
. The impact on your custom rules may vary dependent on the way the autocorrect has been implemented. When manipulating ASTNode
s there seems to be no impact. When, manipulating PsiElement
s, some functions consistently result in a runtime exception.
Based on the refactoring of the rules as provided by ktlint-ruleset-standard
in Ktlint 0.49.x
the suggested refactoring is as follows:
- Replace
LeafElement.replaceWithText(String)
withLeafElement.rawReplaceWithText(String)
. - Replace
PsiElement.addAfter(PsiElement, PsiElement)
withAstNode.addChild(AstNode, AstNode)
. Note that this method inserts the new node (first) argument before the second argument node and as of that is not a simple replacement of thePsiElement.addAfter(PsiElement, PsiElement)
. - Replace
PsiElement.replace(PsiElement)
with a sequence ofAstNode.addChild(AstNode, AstNode)
andAstNode.removeChild(AstNode)
.
Be aware that your custom rules might use other functions which also throw exceptions when the extension point org.jetbrains.kotlin.com.intellij.treeCopyHandler
is no longer supported.
In order to help you to analyse and fix the problems with your custom rules, ktlint temporarily supports to disable the extension point org.jetbrains.kotlin.com.intellij.treeCopyHandler
using a flag. This flag is available in the Ktlint CLI and in the KtlintRuleEngine
. By default, the extension point is enabled like it was in previous versions of ktlint.
At least you should analyse the problems by running your test suits by running ktlint and disabling the extension point. Next you can start with fixing and releasing the updated rules. All rules in this version of ktlint have already been refactored and are not dependent on the extension point anymore. In Ktlint CLI the flag is to be activated with parameter --disable-kotlin-extension-point
. API Consumers that use the KtlintRuleEngine
directly, have to set property enableKotlinCompilerExtensionPoint
to false
.
At this point in time, it is not yet decided what the next steps will be. Ktlint might drop the support of the extension points entirely. Or, if the extension point org.jetbrains.kotlin.com.intellij.treeCopyHandler
is fully supported at the time that ktlint will be based on kotlin 1.9 it might be kept. In either case, the flag will be dropped in a next version of ktlint.
- Add new experimental rule
binary-expression-wrapping
. This rule wraps a binary expression in case the max line length is exceeded (#1940) - Add flag to disable extension point
org.jetbrains.kotlin.com.intellij.treeCopyHandler
to analyse impact on custom rules #1981 - Add new experimental rule
no-empty-file
for all code styles. A kotlin (script) file may not be empty (#1074) - Add new experimental rule
statement-wrapping
which ensures function, class, or other blocks statement body doesn't start or end at starting or ending braces of the block (#1938). Note, although this rule is added in this release, it is never executed except in unit tests. - Add new experimental rule
blank-line-before-declaration
. This rule requires a blank line before class, function or property declarations (#1939) - Wrap multiple statements on same line
wrapping
(#1078) - Add new rule
ktlint-suppression
to replace thektlint-disable
andktlint-enable
directives with annotations. This rule can not be disabled via the.editorconfig
(#1947) - Inform user about using
--format
option of KtLint CLI when finding a violation that can be autocorrected (#1071)
- Code which was deprecated in
0.49.x
is removed. Consult changelog of 0.49.x` released for more information. Summary of removed code:
- Do not flag a (potential) mutable extension property in case the getter is annotated or prefixed with a modifier
property-naming
(#2024) - Do not merge an annotated expression body with the function signature even if it fits on a single line (#2043)
- Ignore property with name
serialVersionUID
inproperty-naming
(#2045) - Prevent incorrect reporting of violations in case a nullable function type reference exceeds the maximum line length
parameter-list-wrapping
(#1324) - Prevent false negative on
else
branch when body contains only chained calls or binary expression (#2057) - Fix indent when property value is wrapped to next line (#2095)
- Fix Java interoperability issues with
RuleId
andRuleSetId
classes. Those classes were defined as value classes in0.49.0
and0.49.1
. Although the classes were marked with@JvmInline
it seems that it is not possible to uses those classes from Java base API Consumers like Spotless. The classes have now been replaced with data classes (#2041) - Update dependency
info.picocli:picocli
tov4.7.4
- Update dependency
org.junit.jupiter:junit-jupiter
tov5.9.3
- Update Kotlin development version to
1.8.22
and Kotlin version to1.8.22
. - Update dependency
io.github.detekt.sarif4k:sarif4k
tov0.4.0
- Update dependency
org.jetbrains.dokka:dokka-gradle-plugin
tov1.8.20
- Run format up to 3 times in case formatting introduces changes which also can be autocorrected (#2084)
0.49.1 - 2023-05-12
- Store path of file containing a lint violation relative to the location of the baseline file itself (#1962)
- Print absolute path of file in lint violations when flag "--relative" is not specified in Ktlint CLI (#1963)
- Handle parameter
--code-style=android_studio
in Ktlint CLI identical to deprecated parameter--android
(#1982) - Prevent nullpointer exception (NPE) if class without body is followed by multiple blank lines until end of file
no-consecutive-blank-lines
(#1987) - Allow to 'unset' the
.editorconfig
propertyktlint_function_signature_rule_force_multiline_when_parameter_count_greater_or_equal_than
when usingktlint_official
code stylefunction-signature
(#1977) - Prevent nullpointer exception (NPE) if or operator at start of line is followed by dot qualified expression
indent
(#1993) - Fix indentation of multiline parameter list in function literal
indent
(#1976) - Restrict indentation of closing quotes to
ktlint_official
code style to keep formatting of other code styles consistent with0.48.x
and beforeindent
(#1971) - Extract rule
no-single-line-block-comment
fromcomment-wrapping
rule. Theno-single-line-block-comment
rule is added as experimental rule to thektlint_official
code style, but it can be enabled explicitly for the other code styles as well. (#1980) - Clean-up unwanted logging dependencies (#1998)
- Fix directory traversal for patterns referring to paths outside of current working directory or any of it child directories (#2002)
- Prevent multiple expressions on same line separated by semicolon (#1078)
- Moved class
Baseline
fromktlint-cli
toktlint-cli-reporter-baseline
so that Baseline functionality is reusable for API Consumers.
0.49.0 - 2023-04-21
WARNING: This version of KtLint contains a number of breaking changes in KtLint CLI and KtLint API. If you are using KtLint with custom ruleset jars or custom reporter jars, then those need to be upgraded before you can use them with this version of ktlint. Please contact the maintainers of those jars and ask them to upgrade a.s.a.p.
All rule id's in the output of Ktlint are now prefixed with a rule set. Although KtLint currently supports standard rules to be unqualified, users are encouraged to include the rule set id in all references to rules. This includes following:
- The
--disabled-rules
parameter in KtLint CLI. - The
.editorconfig
properties used to enable or disable rule and rule sets. Note that propertiesdisabled_rules
andktlint_disabled_rules
have been removed in this release. See disabled rules for more information. - The
source
element in the KtLint CLIbaseline.xml
file. Regenerating this file, fixes all rule references automatically. - The KtLint disable directives
ktlint-enable
/ktlint-disable
and the@Suppress('ktlint:...')
annotations. - The
VisitorModifier.RunAfterRule
.
The experimental
rule set has been merged with standard
rule set. The rules which formerly were part of the experimental
rule set are still being treated as before. The rules will only be run in case .editorconfig
property ktlint_experimental
is enabled or in case the rule is explicitly enabled.
Note that the prefix experimental:
has to be removed from all references to this rule. Check references in:
- The
--disabled-rules
parameter in KtLint CLI. - The
.editorconfig
properties used to enable or disable rule and rule sets. Note that propertiesdisabled_rules
andktlint_disabled_rules
have been removed in this release. See disabled rules for more information. - The KtLint disable directives
ktlint-enable
/ktlint-disable
and the@Suppress('ktlint:...')
annotations. - The
VisitorModifier.RunAfterRule
.
The rules below have been promoted to non-experimental rules:
- block-comment-initial-star-alignment
- class-naming
- comment-wrapping
- function-return-type-spacing
- function-start-of-body-spacing
- function-type-reference-spacing
- fun-keyword-spacing
- kdoc-wrapping
- modifier-list-spacing
- nullable-type-spacing
- spacing-between-function-name-and-opening-parenthesis
- unnecessary-parentheses-before-trailing-lambda
Note that this only affects users that have enabled the standard ruleset while having the experimental rules disabled.
This release is intended to be the last release before the 1.0.x release of ktlint. If all goes as planned, the 1.0.x release does not contain any new breaking changes with except of removal of functionality which is deprecated in this release.
This release contains a lot of breaking changes which aims to improve the future maintainability of Ktlint. If you get stuck while migrating, please reach out to us by creating an issue.
Rules in custom rule sets can now be marked as experimental by implementing the Rule.Experimental
interface on the rule. Rules marked with this interface will only be executed by Ktlint if .editorconfig
property ktlint_experimental
is enabled or if the rule itself has been enabled explicitly.
When using this feature, experimental rules should not be defined in a separate rule set as that would require a distinct rule set id. When moving a rule from an experimental rule set to a non-experimental rule set this would mean that the qualified rule id changes. For users of such rules this means that ktlint directives to suppress the rule and properties in the .editorconfig
files have to be changed.
Field defaultAndroidValue
in class EditorConfigProperty
has been renamed to androidStudioCodeStyleDefaultValue
. New fields ktlintOfficialCodeStyleDefaultValue
and intellijIdeaCodeStyleDefaultValue
have been added. Read more about this in the section "Ktlint Official code style".
The .editorconfig
properties disabled_rules
and ktlint_disabled_rules
are no longer supported. Specifying those properties in the editorConfigOverride
or editorConfigDefaults
result in warnings at runtime.
A new code style ktlint_official
is introduced. This code style is work in progress but will become the default code style in the 1.0
release. Please try out the new code style and provide your feedback via the issue tracker.
This ktlint_official
code style combines the best elements from the Kotlin Coding conventions and Android's Kotlin styleguide. This code style also provides additional formatting on topics which are not (explicitly) mentioned in those conventions and style guide. But do note that this code style sometimes formats code in a way which is not accepted by the default code formatters in IntelliJ IDEA and Android Studio. The formatters of those editors produce nicely formatted code in the vast majority of cases. But in a number of edge cases, the formatting contains bugs which are waiting to be fixed for several years. The new code style formats code in a way which is compatible with the default formatting of the editors whenever possible. When using this codestyle, it is best to disable (e.g. not use) code formatting in the editor.
The existing code styles have been renamed to make more clear what the basis of the code style is.
The official
code style has been renamed to intellij_idea
. Code formatted with this code style aims to be compatible with default formatter of IntelliJ IDEA. This code style is based on Kotlin Coding conventions. If .editorconfig
property ktlint_code_style
has been set to android
then do not forget to change the value of that property to intellij_idea
. When not set, this is still the default code style of ktlint 0.49
. Note that the default code style will be changed to ktlint_official
in the 1.0
release.
Code style android
has been renamed to android_studio
. Code formatted with this code style aims to be compatible with default formatter of Android Studio. This code style is based on Android's Kotlin styleguide. If .editorconfig
property ktlint_code_style
has been set to android
then do not forget to change the value of that property to android_studio
.
The internal structure of the Ktlint project has been revised. The Ktlint CLI and KtLint API modules have been decoupled where possible. Modules have been restructured and renamed. See API Overview for more information.
This is the last release that contains module ktlint-core
as it had too many responsibilities. All classes in this module are relocated to other modules. Some classes have also been renamed. See tables below for details. Classes that are left behind in the ktlint-core
module are deprecated and were kept in this version for backwards compatibility only. The ktlint-core
module will be removed in Ktlint 0.50.x
.
Classes below have been moved from module ktlint-core
to the new module ktlint-rule-engine-core
:
Old class/package name in ktlint-core |
New class/package name in ktlint-rule-engine-core |
---|---|
com.pinterest.ktlint.core.api.editorconfig | com.pinterest.ktlint.rule.engine.core.api.editorconfig |
com.pinterest.ktlint.core.api.EditorConfigProperties | com.pinterest.ktlint.rule.engine.core.api.EditorConfig |
com.pinterest.ktlint.core.api.OptInFeatures | com.pinterest.ktlint.rule.engine.core.api.OptInFeatures |
com.pinterest.ktlint.core.ast.ElementType | com.pinterest.ktlint.rule.engine.core.api.ElementType |
com.pinterest.ktlint.core.ast.package | com.pinterest.ktlint.rule.engine.core.api.ASTNodeExtension |
com.pinterest.ktlint.core.IndentConfig | com.pinterest.ktlint.rule.engine.core.api.IndentConfig |
com.pinterest.ktlint.core.Rule | com.pinterest.ktlint.rule.engine.core.api.Rule |
com.pinterest.ktlint.core.RuleProvider | com.pinterest.ktlint.rule.engine.core.api.RuleProvider |
Classes below have been moved from module ktlint-core
to the new module ktlint-rule-engine
:
Old class/package name in ktlint-core |
New class/package name in ktlint-rule-engine |
---|---|
com.pinterest.ktlint.core.api.EditorConfigDefaults | com.pinterest.ktlint.rule.engine.api.EditorConfigDefaults |
com.pinterest.ktlint.core.api.EditorConfigOverride | com.pinterest.ktlint.rule.engine.api.EditorConfigOverride |
com.pinterest.ktlint.core.api.KtLintParseException | com.pinterest.ktlint.rule.engine.api.KtLintParseException |
com.pinterest.ktlint.core.api.KtLintRuleException | com.pinterest.ktlint.rule.engine.api.KtLintRuleException |
com.pinterest.ktlint.core.KtLint | com.pinterest.ktlint.rule.engine.api.KtLintRuleEngine |
com.pinterest.ktlint.core.LintError | com.pinterest.ktlint.rule.engine.api.LintError |
Class com.pinterest.ktlint.core.KtLint.Code.CodeFile
has been replaced with factory method com.pinterest.ktlint.rule.engine.api.Code.fromFile
. Likewise, class com.pinterest.ktlint.core.KtLint.Code.CodeSnippet
has been replaced with factory method com.pinterest.ktlint.rule.engine.api.Code.fromSnippet
.
Class below has been moved from module ktlint-core
to the new module ktlint-cli-ruleset-core
:
Old class/package name in ktlint-core |
New class/package name in ktlint-cli-ruleset-core |
---|---|
com.pinterest.ktlint.core.RuleSetProviderV2 | com.pinterest.ktlint.cli.ruleset.core.api.RuleSetProviderV3 |
Class below has been moved from module ktlint-core
to the new module ktlint-cli-reporter-core
:
Old class/package name in ktlint-core |
New class/package name in ktlint-cli-reporter-core |
---|---|
com.pinterest.ktlint.core.KtlintVersion | com.pinterest.ktlint.cli.reporter.core.api.KtlintVersion |
Class below has been moved from module ktlint-core
to the new module ktlint-logger
:
Old class/package name in ktlint-core |
New class/package name in ktlint-logger |
---|---|
com.pinterest.ktlint.core.KtLintKLoggerInitializer.kt | com.pinterest.ktlint.logger.api.KtLintKLoggerInitializer.kt |
Class below has been relocated from module ktlint-core
to module ktlint-cli
:
Old class/package name in ktlint-core |
New class/package name in ktlint-cli |
---|---|
com.pinterest.ktlint.core.api.Baseline | com.pinterest.ktlint.cli.api.Baseline |
Module ktlint-reporter-baseline
has been renamed to ktlint-cli-reporter-baseline
. Class below has been relocated:
Old class/package name in ktlint-reporter-baseline |
New class/package name in ktlint-cli-reporter-baseline |
---|---|
com.pinterest.ktlint.reporter.baseline | com.pinterest.ktlint.cli.reporter.baseline |
Module ktlint-reporter-checkstyle
has been renamed to ktlint-cli-reporter-checkstyle
. Class below has been relocated:
Old class/package name in ktlint-reporter-checkstyle |
New class/package name in ktlint-cli-reporter-checkstyle |
---|---|
com.pinterest.ktlint.reporter.checkstyle | com.pinterest.ktlint.cli.reporter.checkstyle |
Module ktlint-reporter-format
has been renamed to ktlint-cli-reporter-format
. Class below has been relocated:
Old class/package name in ktlint-reporter-format |
New class/package name in ktlint-cli-reporter-format |
---|---|
com.pinterest.ktlint.reporter.format | com.pinterest.ktlint.cli.reporter.format |
Module ktlint-reporter-html
has been renamed to ktlint-cli-reporter-html
. Class below has been relocated:
Old class/package name in ktlint-reporter-html |
New class/package name in ktlint-cli-reporter-html |
---|---|
com.pinterest.ktlint.reporter.html | com.pinterest.ktlint.cli.reporter.html |
Module ktlint-reporter-json
has been renamed to ktlint-cli-reporter-json
. Class below has been relocated:
Old class/package name in ktlint-reporter-json |
New class/package name in ktlint-cli-reporter-json |
---|---|
com.pinterest.ktlint.reporter.json | com.pinterest.ktlint.cli.reporter.json |
Module ktlint-reporter-plain
has been renamed to ktlint-cli-reporter-plain
. Class below has been relocated:
Old class/package name in ktlint-reporter-plain |
New class/package name in ktlint-cli-reporter-plain |
---|---|
com.pinterest.ktlint.reporter.plain | com.pinterest.ktlint.cli.reporter.plain |
Module ktlint-reporter-plain-summary
has been renamed to ktlint-cli-reporter-plain-summary
. Class below has been relocated:
Old class/package name in ktlint-reporter-plain-summary |
New class/package name in ktlint-cli-reporter-plain-summary |
---|---|
com.pinterest.ktlint.reporter.plain | com.pinterest.ktlint.cli.reporter.plainsummary |
Module ktlint-reporter-sarif
has been renamed to ktlint-cli-reporter-sarif
. Class below has been relocated:
Old class/package name in ktlint-reporter-sarif |
New class/package name in ktlint-cli-reporter-sarif |
---|---|
com.pinterest.ktlint.reporter.sarif | com.pinterest.ktlint.cli.reporter.sarif |
Custom rule sets build for older versions of KtLint are no longer supported by this version of KtLint. The com.pinterest.ktlint.core.RuleSetProviderV2
interface has been replaced with RuleSetProviderV3
. The accompanying interfaces com.pinterest.ktlint.core.RuleProvider
and com.pinterest.ktlint.core.Rule
have been replaced with com.pinterest.ktlint.ruleset.core.api.RuleProvider
and com.pinterest.ktlint.ruleset.core.api.Rule
respectively.
Contrary to RuleSetProviderV2
, the RuleSetProviderV3
no longer contains information about the rule set. About information now has to be specified in the new Rule
class. This allows custom rule set providers to combine rules originating from different rule sets into a new rule set without loosing information about its origin. The type of the id of the rule set is changed from String
to RuleSetId
.
Note that due to renaming and relocation of the RuleSetProviderV3
interface the name of the service provider in the custom reporter needs to be changed from resources/META-INF/services/com.pinterest.ktlint.core.RuleSetProviderV2
to resources/META-INF/services/com.pinterest.ktlint.cli.ruleset.core.api.RuleSetProviderV3
.
The rule id's in com.pinterest.ktlint.ruleset.core.api.Rule
have been changed from type String
to RuleId
. A RuleId
has a value that must adhere the convention "rule-set-id
:rule-id
". The rule set id standard
is reserved for rules which are maintained by the KtLint project. Rules created by custom rule set providers and API Consumers should use a prefix other than standard
to mark the origin of rules which are not maintained by the KtLint project.
When wrapping a rule from the ktlint project and modifying its behavior, please change the ruleId
and about
fields in the wrapped rule, so that it is clear to users whenever they use the original rule provided by KtLint versus a modified version which is not maintained by the KtLint project.
The typealias com.pinterest.ktlint.core.api.EditorConfigProperties
has been replaced with com.pinterest.ktlint.rule.engine.core.api.EditorConfig
. The interface com.pinterest.ktlint.core.api.UsesEditorConfigProperties
has been removed. Instead, the Rule property usesEditorConfigProperties
needs to be set. As a result of those changes, the beforeFirstNode
function in each rule has to changed to something like below:
class SomeRule : Rule(
ruleId = RuleId("some-rule-set:some-rule"),
usesEditorConfigProperties = setOf(MY_EDITOR_CONFIG_PROPERTY),
) {
private lateinit var myEditorConfigProperty: MyEditorConfigProperty
override fun beforeFirstNode(editorConfig: EditorConfig) {
myEditorConfigProperty = editorConfig[MY_EDITOR_CONFIG_PROPERTY]
}
...
}
Fields loadOnlyWhenOtherRuleIsLoaded
and runOnlyWhenOtherRuleIsEnabled
have been removed from class com.pinterest.ktlint.rule.engine.core.api.Rule.VisitorModifier.RunAfterRule
and are replaced with a single field mode
. The mode
either contains value REGARDLESS_WHETHER_RUN_AFTER_RULE_IS_LOADED_OR_DISABLED
or ONLY_WHEN_RUN_AFTER_RULE_IS_LOADED_AND_ENABLED
.
Custom Reporters build for older versions of KtLint are no longer supported by this version of KtLint. The com.pinterest.ktlint.core.ReporterProvider
interface has been replaced with com.pinterest.ktlint.cli.reporter.core.api.ReporterProviderV2
. The accompanying interface com.pinterest.ktlint.core.Reporter
has been replaced with com.pinterest.ktlint.cli.reporter.core.api.ReporterV2
.
Note that due to renaming and relocation of the ReporterProviderV2
interface the name of the service provider in the custom reporter needs to be changed from resources/META-INF/services/com.pinterest.ktlint.core.ReporterProvider
to resources/META-INF/services/com.pinterest.ktlint.cli.reporter.core.api.ReporterProviderV2
.
The biggest change in the ReporterV2
is the replacement of the LintError
class with KtlintCliError
class. The latter class now contains a status field which more clearly explains the difference between a lint error which can be autocorrected versus a lint error that actually has been autocorrected.
API Consumers provide a set of rules directly to the Ktlint Rule Engine. The com.pinterest.ktlint.core.Rule
has been replaced with com.pinterest.ktlint.ruleset.core.api.Rule
.
The type of the rule id's has been changed from type String
to RuleId
. A RuleId
has a value that must adhere to the convention "rule-set-id
:rule-id
". Rule set id standard
is reserved for rules which are maintained by the KtLint project. Custom rules created by the API Consumer should use a prefix other than standard
to clearly mark the origin of rules which are not maintained by the KtLint project.
Also, the field About
has been added. This field specifies the name of the maintainer, and the repository url and issue tracker url of the rule. The about information of a rule is printed whenever a rule throws an exception which is caught by the Ktlint Rule Engine.
When wrapping a rule from the ktlint project and modifying its behavior, please change the ruleId
and about
fields in the wrapped rule, so that it is clear to users whenever they use the original rule provided by KtLint versus a modified version which is not maintained by the KtLint project.
The typealias com.pinterest.ktlint.core.api.EditorConfigProperties
has been replaced with com.pinterest.ktlint.rule.engine.core.api.EditorConfig
. The interface com.pinterest.ktlint.core.api.UsesEditorConfigProperties
has been removed. Instead, the Rule property usesEditorConfigProperties
needs to be set. As a result of those changes, the beforeFirstNode
function in each rule has to changed to something like below:
class SomeRule : Rule(
ruleId = RuleId("some-rule-set:some-rule"),
usesEditorConfigProperties = setOf(MY_EDITOR_CONFIG_PROPERTY),
) {
private lateinit var myEditorConfigProperty: MyEditorConfigProperty
override fun beforeFirstNode(editorConfig: EditorConfig) {
myEditorConfigProperty = editorConfig[MY_EDITOR_CONFIG_PROPERTY]
}
...
}
Fields loadOnlyWhenOtherRuleIsLoaded
and runOnlyWhenOtherRuleIsEnabled
have been removed from class com.pinterest.ktlint.rule.engine.core.api.Rule.VisitorModifier.RunAfterRule
and are replaced with a single field mode
. The mode
either contains value REGARDLESS_WHETHER_RUN_AFTER_RULE_IS_LOADED_OR_DISABLED
or ONLY_WHEN_RUN_AFTER_RULE_IS_LOADED_AND_ENABLED
.
Like before, the API Consumer can still offer a mix of rules originating from ktlint-ruleset-standard
as well as custom rules.
Previously, the default value for .editorconfig
property max_line_length
was set to -1
in ktlint unless the property was defined explicitly in the .editorconfig
or when ktlint_code_style
was set to Android. As a result of that rules have to check that max_line_length contains a positive value before checking that the actual line length is exceeding the maximum. Now the value Int.MAX_VALUE
(use constant MAX_LINE_LENGTH_PROPERTY_OFF
to refer to that value) is used instead.
Constant KtLint.FILE_PATH_USER_DATA_KEY
has been removed. The file path is passed correctly to the node with element type FILE and can be retrieved as follows:
if (node.isRoot()) {
val filePath = (node.psi as? KtFile)?.virtualFilePath
...
}
- Add new code style
ktlint_offical
. The code style is work in progress and should be considered a preview. It is intended to become the default code style in the next release. Please try it out and give your feedback. See code styles for more information. The following rules have been added to thektlint_official
code style (the rules can also be run for other code styles when enabled explicitly):- Add new experimental rule
no-empty-first-line-in-class-body
. This rule disallows a class to start with a blank line. - Add new experimental rule
if-else-bracing
. This rules enforces consistent usage of braces in all branches of a single if, if-else or if-else-if statement. - Add new experimental rule
no-consecutive-comments
. This rule disallows consecutive comments except EOL comments (see [examples](See https://pinterest.github.io/ktlint/rules/experimental/#disallow-consecutive-comments)). - Add new experimental rule
try-catch-finally-spacing
. This rule enforces consistent spacing in try-catch, try-finally and try-catch-finally statement. This rule can also be run for other code styles, but then it needs to be enabled explicitly. - Add new experimental rule
no-blank-line-in-list
. This rule disallows blank lines to be used in super type lists, type argument lists, type constraint lists, type parameter lists, value argument lists, and value parameter lists. (#1224) - Add new experimental rule
multiline-expression-wrapping
. This forces a multiline expression as value in an assignment to start on a separate line. (#1217) - Add new experimental rule
string-template-indent
. This forces multiline string templates which are post-fixed with.trimIndent()
to be formatted consistently. The opening and closing"""
are placed on separate lines and the indentation of the content of the template is aligned with the"""
. (#925) - Add new experimental rule
if-else-wrapping
. This enforces that a single line if-statement is kept simple. A single line if-statement may contain no more than one else-branch. The branches a single line if-statement may not be wrapped in a block. (#812)
- Add new experimental rule
- Wrap the type or value of a function or class parameter in case the maximum line length is exceeded
parameter-wrapping
(#1846) - Wrap the type or value of a property in case the maximum line length is exceeded
property-wrapping
(#1846) - Recognize Kotlin Script when linting and formatting code from
stdin
with KtLint CLI (#1832) - Support Bill of Materials (BOM), now you can integrate Ktlint in your
build.gradle
like:dependencies { implementation(platform("com.pinterest:ktlint-bom:0.49.0")) implementation("com.pinterest:ktlint-core") implementation("com.pinterest:ktlint-reporter-html") implementation("com.pinterest:ktlint-ruleset-standard") ... }
- Add new experimental rule
enum-wrapping
for all code styles. An enum should either be a single line, or each enum entry should be defined on a separate line. (#1903)
- Remove support of the
.editorconfig
propertiesdisabled_rules
andktlint_disabled_rules
. See disabled rules for more information. - Remove CLI option
--print-ast
. Use IntelliJ IDEA PsiViewer plugin instead. (#1925)
- An enumeration class having a primary constructor and in which the list of enum entries is followed by a semicolon then do not remove the semicolon in case it is followed by code element
no-semi
(#1733) - Do not add the (first line of the) body expression on the same line as the function signature in case the max line length would be exceeded.
function-signature
. - Do not add the first line of a multiline body expression on the same line as the function signature in case function body expression wrapping property is set to
multiline
.function-signature
. - Disable the
standard:filename
rule whenever Ktlint CLI is run with option--stdin
(#1742) - The parameters of a function literal containing a multiline parameter list are aligned with first parameter whenever the first parameter is on the same line as the start of that function literal (not allowed in
ktlint_official
code style)indent
(#1756) - Do not throw exception when enum class does not contain entries
trailing-comma-on-declaration-site
(#1711) - Fix continuation indent for a dot qualified array access expression in
ktlint_official
code style onlyindent
(#1540) - When generating the
.editorconfig
use valueoff
for themax_line_length
property instead of value-1
to denote that lines are not restricted to a maximum length (#1824) - Do not report an "unnecessary semicolon" after adding a trailing comma to an enum class containing a code element after the last enum entry
trailing-comma-on-declaration-site
(#1786) - A newline before a function return type should not be removed in case that leads to exceeding the maximum line length
function-return-type-spacing
(#1764) - Wrap annotations on type arguments in same way as with other constructs
annotation
,wrapping
(#1725) - Fix indentation of try-catch-finally when catch or finally starts on a newline
indent
(#1788) - Fix indentation of a multiline typealias
indent
(#1788) - Fix false positive when multiple KDOCs exists between a declaration and another annotated declaration
spacing-between-declarations-with-annotations
(#1802) - Fix false positive when a single line statement containing a block having exactly the maximum line length is preceded by a blank line
wrapping
(#1808) - Fix false positive when a single line contains multiple dot qualified expressions and/or safe expressions
indent
(#1830) - Enforce spacing around rangeUntil operator
..<
similar to the range operator..
inrange-spacing
(#1858) - When
.editorconfig
propertyij_kotlin_imports_layout
contains a|
but no import exists that match any pattern before the first|
then do not report a violation nor insert a blank lineimport-ordering
(#1845) - When negate-patterns only are specified in Ktlint CLI then automatically add the default include patterns (
**/*.kt
and**/*.kts
) so that all Kotlin files excluding the files matching the negate-patterns will be processed (#1847) - Do not remove newlines from multiline type parameter lists
type-parameter-list-spacing
(#1867) - Wrap each type parameter in a multiline type parameter list
wrapping
(#1867) - Allow value arguments with a multiline expression to be indented on a separate line
indent
(#1217) - When enabled, the ktlint rule checking is disabled for all code surrounded by the formatter tags (see faq) (#670)
- Remove trailing comma if last two enum entries are on the same line and trailing commas are not allowed.
trailing-comma-on-declaration-site
(#1905) - Wrap annotated function parameters to a separate line in code style
ktlint_official
only.function-signature
,parameter-list-wrapping
(#1908) - Wrap annotated projection types in type argument lists to a separate line
annotation
(#1909) - Add newline after adding trailing comma in parameter list of a function literal
trailing-comma-on-declaration-site
(#1911) - Wrap annotations before class constructor in code style
ktlint_official
.annotation
(#1916) - Annotations on type projections should be wrapped in same way as other annotations
annotation
(#1917) - An if-else followed by an elvis operator should not be wrapped in an else-block
multiline-if-else
(#1904)
- Wrap the parameters of a function literal containing a multiline parameter list (only in
ktlint_official
code style)parameter-list-wrapping
(#1681). - KtLint CLI exits with an error in any of following cases (this list is not exhaustive):
- A custom ruleset jar is to be loaded and that jar contains a deprecated RuleSetProviderV2.
- A custom ruleset jar is to be loaded and that jar does not contain the required RuleSetProviderV3.
- A custom reporter jar is to be loaded and that jar contains a deprecated ReporterProvider.
- A custom reporter jar is to be loaded and that jar does not contain the required ReporterProviderV2.
- Disable the default patterns if the option
--patterns-from-stdin
is specified (#1793) - Update Kotlin development version to
1.8.20
and Kotlin version to1.8.20
. - Revert to matrix build to speed up build, especially for the Windows related build (#1787)
- For the new code style
ktlint_official
, do not allow wildcard importsjava.util
andkotlinx.android.synthetic
by default. Important:.editorconfig
propertyij_kotlin_packages_to_use_import_on_demand
needs to be set to valueunset
in order to enforce IntelliJ IDEA default formatter to not generate wildcard importsno-wildcard-imports
(#1797) - Convert a single line block comment to an EOL comment if not preceded or followed by another code element on the same line
comment-wrapping
(#1941) - Ignore a block comment inside a single line block
comment-wrapping
(#1942)
0.48.2 - 2023-01-21
Starting with Ktlint 0.48.x
, rule and rule sets can be enabled/disabled with a separate property per rule (set). Please read deprecation of (ktlint_)disable_rules property for more information.
API Consumers that provide experimental rules to the KtLintRuleEngine, must also enable the experimental rules or instruct their users to do so in the .editorconfig
file. From the perspective of the API Consumer it might be confusing or unnecessary to do so as the experimental rule was already provided explicitly.
Ktlint wants to provide the user (e.g. a developer) a uniform and consistent user experience. The .editorconfig
becomes more and more central to store configuration for Ktlint. This to ensure that all team members use the exact same configuration when running ktlint regardless whether the Ktlint CLI or an API Consumer is being used.
The .editorconfig
is a powerful configuration tool which can be used in very different ways. Most projects use a single .editorconfig
file containing one common section for kotlin and kotlin scripts files. For example, the .editorconfig
file of the Ktlint project contains following section:
[*.{kt,kts}]
ij_kotlin_imports_layout = *
ij_kotlin_allow_trailing_comma = true
ij_kotlin_allow_trailing_comma_on_call_site = true
Other projects might contain multiple .editorconfig
files for different parts of the project directory hierarchy. Or, use a single .editorconfig
file containing multiple sections with different globs. Like all other configuration settings in Ktlint, the user should be able to enable and disable the experimental rules. Both for the entire set of experimental rules and for individual experimental rules.
Ktlint allows API Consumers to set default values and override values for the .editorconfig
. Specifying a default value means that the user does not need to define the property in the .editorconfig
file but if the user specifies the value, it will take precedence. Specifying the override value ensures that this takes precedence on a value specified by the user in the .editorconfig
.
From the Ktlint perspective, it is advised that API Consumers provide the default value. See example below, for how to specify the editorConfigDefault
property:
KtLintRuleEngine(
ruleProviders = ruleProviders,
editorConfigDefaults = EditorConfigDefaults(
EditorConfig
.builder()
.section(
Section
.builder()
.glob(Glob("*.{kt,kts}"))
.properties(
Property
.builder()
.name("ktlint_experimental")
.value("enabled"),
),
)
.build()
)
)
If the user has set property ktlint_experimental
explicitly than that value will be used. If the value is not defined, the value provided via editorConfigDefaults
will be used.
If you do want to ignore the value of ktlint_experimental
as set by the user, than you can set the EditorConfigOverride property. But as said before that is discouraged as the user might not understand why the .editorconfig
property is being ignored (provided that the value set is not equal to the value provided by the API Consumer).
- Fix with array-syntax annotations on the same line as other annotations
annotation
(#1765) - Do not enable the experimental rules by default when
.editorconfig
propertiesdisabled_rules
orktlint_disabled_rules
are set. (#1771) - A function signature not having any parameters which exceeds the
max-line-length
should be ignored by rulefunction-signature
(#1773) - Allow diacritics in names of classes, functions packages, and properties
class-naming
,function-naming
,package-name
,property-naming
(#1757) - Prevent violation of
file-name
rule on code snippets (#1768) - Clarify that API Consumers have to enable experimental rules (#1768)
- Trim spaces in the
.editorconfig
propertyij_kotlin_imports_layout
's entries (#1770)
0.48.1 - 2023-01-03
- An enumeration class having a primary constructor and in which the list of enum entries is followed by a semicolon then do not remove the semicolon in case it is followed by code element
no-semi
(#1733) - Add API so that KtLint API consumer is able to process a Kotlin script snippet without having to specify a file path (#1738)
- Disable the
standard:filename
rule whenever Ktlint CLI is run with option--stdin
(#1742) - Fix initialization of the logger when
--log-level
is specified. Throw exception when an invalid value is passed. (#1749) - Fix loading of custom rule set JARs.
- Rules provided via a custom rule set JAR (Ktlint CLI) or by an API provider are enabled by default. Only rules in the
experimental
rule set are disabled by default. (#1747)
- Update Kotlin development version to
1.8.0
and Kotlin version to1.8.0
.
0.48.0 - 2022-12-15
The indent
rule has been rewritten from scratch. Solving problems in the old algorithm was very difficult. With the new algorithm this becomes a lot easier. Although the new implementation of the rule has been compared against several open source projects containing over 400,000 lines of code, it is still likely that new issues will be discovered. Please report your indentation issues so that these can be fixed as well.
In the previous release (0.47.x), the .editorconfig
property disabled_rules
was deprecated and replaced with ktlint_disabled_rules
. This latter property has now been deprecated as well in favour of a more flexible and better maintainable solution. Rule and rule sets can now be enabled/disabled with a separate property per rule (set). Please read deprecation of (ktlint_)disable_rules property for more information.
The KtLint CLI has not been changed. Although you can still use parameter --experimental
to enable KtLint's Experimental rule set, you might want to set .editorconfig
property ktlint_experimental = enabled
instead.
If you are not an API consumer or Rule Set provider then you can skip this section.
Classes below have been relocated:
- Class
com.pinterest.ktlint.core.api.UsesEditorConfigProperties.EditorConfigProperty
has been replaced withcom.pinterest.ktlint.core.api.editorconfig.EditorConfigProperty
. - Class
com.pinterest.ktlint.core.KtLintParseException
has been replaced withcom.pinterest.ktlint.core.api.KtLintParseException
. - Class
com.pinterest.ktlint.core.RuleExecutionException
has been replaced withcom.pinterest.ktlint.core.api.KtLintRuleException
. - Class
com.pinterest.ktlint.reporter.format.internal.Color
has been moved tocom.pinterest.ktlint.reporter.format.Color
. - Class
com.pinterest.ktlint.reporter.plain.internal.Color
has been moved tocom.pinterest.ktlint.reporter.plain.Color
.
This is the last release that supports the ExperimentalParams
to invoke the lint
and format
functions of KtLint. The ExperimentalParams
contains a mix of configuration settings which are not dependent on the file/code which is to be processed. Other parameters in that class describe the code/file to be processed but can be configured inconsistently (for example a file with name "foo.kt" could be marked as a Kotlin Script file).
The static object KtLint
is deprecated and replaced by class KtLintRuleEngine
which is configured with KtLintRuleEngineConfiguration
. The instance of the KtLintRuleEngine
is intended to be reused for scanning all files in a project and should not be recreated per file.
Both lint
and format
are simplified and can now be called for a code block or for an entire file.
import java.io.File
// Define a reusable instance of the KtLint Rule Engine
val ktLintRuleEngine = KtLintRuleEngine(
// Define configuration
)
// Process a collection of files
val files: Set<File> // Collect files in a convenient way
files.forEach(file in files) {
ktLintRuleEngine.lint(file) {
// Handle lint violations
}
}
// or process a code sample for a given filepath
ktLintRuleEngine.lint(
code = "code to be linted",
filePath = Path("/path/to/source/file")
) {
// Handle lint violations
}
The list of .editorconfig
files which will be accessed by KtLint when linting or formatting a given path can now be retrieved with the new API KtLint.editorConfigFilePaths(path: Path): List<Path>
.
This API can be called with either a file or a directory. It's intended usage is that it is called once with the root directory of a project before actually linting or formatting files of that project. When called with a directory path, all .editorconfig
files in the directory or any of its subdirectories (except hidden directories) are returned. In case the given directory does not contain an .editorconfig
file or if it does not contain the root=true
setting, the parent directories are scanned as well until a root .editorconfig
file is found.
Calling this API with a file path results in the .editorconfig
files that will be accessed when processing that specific file. In case the directory in which the file resides does not contain an .editorconfig
file or if it does not contain the root=true
setting, the parent directories are scanned until a root .editorconfig
file is found.
Constant KtLint.FILE_PATH_USER_DATA_KEY
is deprecated and will be removed in KtLint version 0.49.0. The file name will be passed correctly to the node with element type FILE and can be retrieved as follows:
if (node.isRoot()) {
val fileName = (node.psi as? KtFile)?.name
...
}
- Wrap blocks in case the max line length is exceeded or in case the block contains a new line
wrapping
(#1643) - patterns can be read in from
stdin
with the--patterns-from-stdin
command line options/flags (#1606) - Add basic formatting for context receiver in
indent
rule and new experimental rulecontext-receiver-wrapping
(#1672) - Add naming rules for classes and objects (
class-naming
), functions (function-naming
) and properties (property-naming
) (#44) - Add new built-in reporter
plain-summary
which prints a summary the number of violation which have been autocorrected or could not be autocorrected, both split by rule.
- Let a rule process all nodes even in case the rule is suppressed for a node so that the rule can update the internal state (#1644)
- Read
.editorconfig
when running CLI with options--stdin
and--editorconfig
(#1651) - Do not add a trailing comma in case a multiline function call argument is found but no newline between the arguments
trailing-comma-on-call-site
(#1642) - Add missing
ktlint_disabled_rules
to exposededitorConfigProperties
(#1671) - Do not add a second trailing comma, if the original trailing comma is followed by a KDOC
trailing-comma-on-declaration-site
andtrailing-comma-on-call-site
(#1676) - A function signature preceded by an annotation array should be handled similar as function preceded by a singular annotation
function-signature
(#1690) - Fix offset of annotation violations
- Fix line offset when blank line found between class and primary constructor
- Remove needless blank line between class followed by EOL, and primary constructor
- Fix offset of unexpected linebreak before assignment
- Remove whitespace before redundant semicolon if the semicolon is followed by whitespace
- Update Kotlin development version to
1.8.0-RC
and Kotlin version to1.7.21
. - The default value for trailing commas on call site is changed to
true
unless theandroid codestyle
is enabled. Note that KtLint from a consistency viewpoint enforces the trailing comma on call site while default IntelliJ IDEA formatting only allows the trailing comma but leaves it up to the developer's discretion. (#1670) - The default value for trailing commas on declaration site is changed to
true
unless theandroid codestyle
is enabled. Note that KtLint from a consistency viewpoint enforces the trailing comma on declaration site while default IntelliJ IDEA formatting only allows the trailing comma but leaves it up to the developer's discretion. (#1669) - CLI options
--debug
,--trace
,--verbose
and-v
are replaced with--log-level=<level>
or the short version `-l=, see CLI log-level. (#1632) - In CLI, disable logging entirely by setting
--log-level=none
or-l=none
(#1652) - Rewrite
indent
rule. Solving problems in the old algorithm was very difficult. With the new algorithm this becomes a lot easier. Although the new implementation of the rule has been compared against several open source projects containing over 400,000 lines of code, it is still likely that new issues will be discovered. Please report your indentation issues so that these can be fixed as well. (#1682, #1321, #1200, #1562, #1563, #1639) - Add methods "ASTNode.upsertWhitespaceBeforeMe" and "ASTNode.upsertWhitespaceAfterMe" as replacements for "LeafElement.upsertWhitespaceBeforeMe" and "LeafElement.upsertWhitespaceAfterMe". The new methods are more versatile and allow code to be written more readable in most places. (#1687)
- Rewrite
indent
rule. Solving problems in the old algorithm was very difficult. With the new algorithm this becomes a lot easier. Although the new implementation of the rule has been compared against several open source projects containing over 400,000 lines of code, it is still likely that new issues will be discovered. Please report your indentation issues so that these can be fixed as well. (#1682, #1321, #1200, #1562, #1563, #1639, #1688) - Add support for running tests on
java 19
, remove support for running tests onjava 18
. - Update
io.github.detekt.sarif4k:sarif4k
version to0.2.0
(#1701).
0.47.1 - 2022-09-07
- Do not add trailing comma in empty parameter/argument list with comments (
trailing-comma-on-call-site
,trailing-comma-on-declaration-site
) (#1602) - Fix class cast exception when specifying a non-string editorconfig setting in the default ".editorconfig" (#1627)
- Fix indentation before semi-colon when it is pushed down after inserting a trailing comma (#1609)
- Do not show deprecation warning about property "disabled_rules" when using CLi-parameter
--disabled-rules
(#1599) - Traversing directory hierarchy at Windows (#1600)
- Ant-style path pattern support (#1601)
- Apply
@file:Suppress
on all toplevel declarations (#1623)
- Display warning instead of error when no files are matched, and return with exit code 0. (#1624)
0.47.0 - 2022-08-19
If you are not an API consumer nor a RuleSet provider, then you can safely skip this section. Otherwise, please read below carefully and upgrade your usage of ktlint. In this and coming releases, we are changing and adapting important parts of our API in order to increase maintainability and flexibility for future changes. Please avoid skipping a releases as that will make it harder to migrate.
Up until ktlint 0.46 the Rule class provided only one life cycle hook. This "visit" hook was called in a depth-first-approach on all nodes in the file. A rule like the IndentationRule used the RunOnRootOnly visitor modifier to call this lifecycle hook for the root node only in combination with an alternative way of traversing the ASTNodes. Downside of this approach was that suppression of the rule on blocks inside a file was not possible (#631). More generically, this applied to all rules, applying alternative traversals of the AST.
The Rule class now offers new life cycle hooks:
- beforeFirstNode: This method is called once before the first node is visited. It can be used to initialize the state of the rule before processing of nodes starts. The ".editorconfig" properties (including overrides) are provided as parameter.
- beforeVisitChildNodes: This method is called on a node in AST before visiting its child nodes. This is repeated recursively for the child nodes resulting in a depth first traversal of the AST. This method is the equivalent of the "visit" life cycle hooks. However, note that in KtLint 0.48, the UserData of the rootnode no longer provides access to the ".editorconfig" properties. This method can be used to emit Lint Violations and to autocorrect if applicable.
- afterVisitChildNodes: This method is called on a node in AST after all its child nodes have been visited. This method can be used to emit Lint Violations and to autocorrect if applicable.
- afterLastNode: This method is called once after the last node in the AST is visited. It can be used for teardown of the state of the rule.
Optionally, a rule can stop the traversal of the remainder of the AST whenever the goal of the rule has been achieved. See KDoc on Rule class for more information.
The "visit" life cycle hook will be removed in Ktlint 0.48. In KtLint 0.47 the "visit" life cycle hook will be called only when hook "beforeVisitChildNodes" is not overridden. It is recommended to migrate to the new lifecycle hooks in KtLint 0.47. Please create an issue, in case you need additional assistence to implement the new life cycle hooks in your rules.
The KtLint engine needs a more fine-grained control on the instantiation of new Rule instances. Currently, a new instance of a rule can be created only once per file. However, when formatting files the same rule instance is reused for a second processing iteration in case a Lint violation has been autocorrected. By re-using the same rule instance, state of that rule might leak from the first to the second processing iteration.
Providers of custom rule sets have to migrate the custom rule set JAR file. The current RuleSetProvider interface which is implemented in the custom rule set is deprecated and marked for removal in KtLint 0.48. Custom rule sets using the old RuleSetProvider interface will not be run in KtLint 0.48 or above.
For now, it is advised to implement the new RuleSetProviderV2 interface without removing the old RuleSetProvider interface. In this way, KtLint 0.47 and above use the RuleSetProviderV2 interface and ignore the old RuleSetProvider interface completely. KtLint 0.46 and below only use the old RuleSetProvider interface.
Adding the new interface is straight forward, as can be seen below:
// Current implementation
public class CustomRuleSetProvider : RuleSetProvider {
override fun get(): RuleSet = RuleSet(
"custom",
CustomRule1(),
CustomRule2(),
)
}
// New implementation
public class CustomRuleSetProvider :
RuleSetProviderV2(CUSTOM_RULE_SET_ID),
RuleSetProvider {
override fun get(): RuleSet =
RuleSet(
CUSTOM_RULE_SET_ID,
CustomRule1(),
CustomRule2()
)
override fun getRuleProviders(): Set<RuleProvider> =
setOf(
RuleProvider { CustomRule1() },
RuleProvider { CustomRule2() }
)
private companion object {
const val CUSTOM_RULE_SET_ID = custom"
}
}
Also note that file 'resource/META-INF/services/com.pinterest.ktlint.core.RuleSetProviderV2' needs to be added. In case your custom rule set provider implements both RuleSetProvider and RuleSetProviderV2, the resource directory contains files for both implementation. The content of those files is identical as the interfaces are implemented on the same class.
Once above has been implemented, rules no longer have to clean up their internal state as the KtLint rule engine can request a new instance of the Rule at any time it suspects that the internal state of the Rule is tampered with (e.g. as soon as the Rule instance is used for traversing the AST).
The KtLint engine needs a more fine-grained control on the instantiation of new Rule instances. Currently, a new instance of a rule can be created only once per file. However, when formatting files the same rule instance is reused for a second processing iteration in case a Lint violation has been autocorrected. By re-using the same rule instance, state of that rule might leak from the first to the second processing iteration.
The ExperimentalParams parameter which is used to invoke "KtLint.lint" and "KtLint.format" contains a new parameter "ruleProviders" which will replace the "ruleSets" parameter in KtLint 0.48. Exactly one of those parameters should be a non-empty set. It is preferred that API consumers migrate to using "ruleProviders".
// Old style using "ruleSets"
KtLint.format(
KtLint.ExperimentalParams(
...
ruleSets = listOf(
RuleSet(
"custom",
CustomRule1(),
CustomRule2()
)
),
...
)
)
// New style using "ruleProviders"
KtLint.format(
KtLint.ExperimentalParams(
...
ruleProviders = setOf(
RuleProvider { CustomRule1() },
RuleProvider { CustomRule2() }
),
cb = { _, _ -> }
)
)
Once above has been implemented, rules no longer have to clean up their internal state as the KtLint rule engine can request a new instance of the Rule at any time it suspects that the internal state of the Rule is tampered with (e.g. as soon as the Rule instance is used for traversing the AST).
The callback function provided as parameter to the format function is now called for all errors regardless whether the error has been autocorrected. Existing consumers of the format function should now explicitly check the autocorrected
flag in the callback result and handle it appropriately (in most case this will be ignoring the callback results for which autocorrected
has value true
).
Class com.pinterest.ktlint.core.internal.CurrentBaseline
has been replaced with com.pinterest.ktlint.core.api.Baseline
.
Noteworthy changes:
- Field
baselineRules
(nullable) is replaced with `lintErrorsPerFile (non-nullable). - Field
baselineGenerationNeeded
(boolean) is replaced withstatus
(typeBaseline.Status
).
The utility functions provided via com.pinterest.ktlint.core.internal.CurrentBaseline
are moved to the new class. One new method List<LintError>.doesNotContain(lintError: LintError)
is added.
The .editorconfig
property disabled_rules
(api property DefaultEditorConfigProperties.disabledRulesProperty
) has been deprecated and will be removed in a future version. Use ktlint_disabled_rules
(api property DefaultEditorConfigProperties.ktlintDisabledRulesProperty
) instead as it more clearly identifies that ktlint is the owner of the property. This property is to be renamed in .editorconfig
files and ExperimentalParams.editorConfigOverride
.
Although, Ktlint 0.47.0 falls back on property disabled_rules
whenever ktlint_disabled_rules
is not found, this result in a warning message being printed.
Parameter "ExperimentalParams.editorConfigPath" is deprecated in favor of the new parameter "ExperimentalParams.editorConfigDefaults". When used in the old implementation this resulted in ignoring all ".editorconfig" files on the path to the file. The new implementation uses properties from the "editorConfigDefaults"parameter only when no ".editorconfig" files on the path to the file supplies this property for the filepath.
API consumers can easily create the EditConfigDefaults by calling "EditConfigDefaults.load(path)" or creating it programmatically.
Some API Consumers keep a long-running instance of the KtLint engine alive. In case an .editorconfig
file is changed, which was already loaded into the internal cache of the KtLint engine this change would not be taken into account by KtLint. One way to deal with this, was to clear the entire KtLint cache after each change in an .editorconfig
file.
Now, the API consumer can reload an .editorconfig
. If the .editorconfig
with given path is actually found in the cached, it will be replaced with the new value directly. If the file is not yet loaded in the cache, loading will be deferred until the file is actually requested again.
Example:
KtLint.reloadEditorConfigFile("/some/path/to/.editorconfig")
Several methods for which it is unlikely that they are used by API consumers have been marked for removal from the public API in KtLint 0.48.0. Please create an issue in case you have a valid business case to keep such methods in the public API.
- Add
format
reporter. This reporter prints a one-line-summary of the formatting status per file. (#621).
- Fix cli argument "--disabled_rules" (#1520).
- A file which contains a single top level declaration of type function does not need to be named after the function but only needs to adhere to the PascalCase convention.
filename
(#1521). - Disable/enable IndentationRule on blocks in middle of file. (
indent
) #631 - Allow usage of letters with diacritics in enum values and filenames (
enum-entry-name-case
,filename
) (#1530). - Fix resolving of Java version when JAVA_TOOL_OPTIONS is set (#1543)
- When a glob is specified then ensure that it matches files in the current directory and not only in subdirectories of the current directory (#1533).
- Execute
ktlint
cli on default kotlin extensions only when an (existing) path to a directory is given. (#917). - Invoke callback on
format
function for all errors including errors that are autocorrected (#1491) - Merge first line of body expression with function signature only when it fits on the same line
function-signature
(#1527) - Add missing whitespace when else is on same line as true condition
multiline-if-else
(#1560) - Fix multiline if-statements
multiline-if-else
(#828) - Prevent class cast exception on ".editorconfig" property
ktlint_code_style
(#1559) - Handle trailing comma in enums
trailing-comma
(#1542) - Allow EOL comment after annotation (#1539)
- Split rule
trailing-comma
intotrailing-comma-on-call-site
andtrailing-comma-on-declaration-site
(#1555) - Support globs containing directories in the ".editorconfig" supplied via CLI "--editorconfig" (#1551)
- Fix indent of when entry with a dot qualified expression instead of simple value when trailing comma is required (#1519)
- Fix whitespace between trailing comma and arrow in when entry when trailing comma is required (#1519)
- Prevent false positive in parameter list for which the last value parameter is a destructuring declaration followed by a trailing comma
wrapping
(#1578)
- Print an error message and return with non-zero exit code when no files are found that match with the globs (#629).
- Invoke callback on
format
function for all errors including errors that are autocorrected (#1491) - Improve rule
annotation
(#1574) - Rename
.editorconfig
propertydisabled_rules
toktlint_disabled_rules
(#701) - Allow file and directory paths in CLI-parameter "--editorconfig" (#1580)
- Update Kotlin development version to
1.7.20-beta
and Kotlin version to1.7.10
. - Update release scripting to set version number in mkdocs documentation (#1575).
- Update Gradle to
7.5.1
version
- Remove support to generate IntelliJ IDEA configuration files as this no longer fits the scope of the ktlint project (#701)
0.46.1 - 2022-06-21
Minor release to address some regressions introduced in 0.46.0
- Remove experimental flag
-Xuse-k2
as it forces API Consumers to compile their projects with this same flag (#1506). - Account for separating spaces when parsing the disabled rules (#1508).
- Do not remove space before a comment in a parameter list (#1509).
- A delegate property which starts on the same line as the property declaration should not have an extra indentation
indent
(#1510)
0.46.0 - 2022-06-18
The rules below are promoted from the experimental
ruleset to the standard
ruleset.
annotation
annotation-spacing
argument-list-wrapping
double-colon-spacing
enum-entry-name-case
multiline-if-else
no-empty-first-line-in-method-block
package-name
trailing-comma
spacing-around-angle-brackets
spacing-between-declarations-with-annotations
spacing-between-declarations-with-comments
unary-op-spacing
Note that as a result of moving the rules that the prefix experimental:
has to be removed from all references to this rule. Check references in:
- The
.editorconfig
settingdisabled_rules
. - KtLint disable and enable directives.
- The
VisitorModifier.RunAfterRule
.
If your project did not run with the experimental
ruleset enabled before, you might expect new lint violations to be reported. Please note that rules can be disabled via the the .editorconfig
in case you do not want the rules to be applied on your project.
If you are not an API user nor a RuleSet provider, then you can safely skip this section. Otherwise, please read below carefully and upgrade your usage of ktlint. In this and coming releases, we are changing and adapting important parts of our API in order to increase maintainability and flexibility for future changes. Please avoid skipping a releases as that will make it harder to migrate.
The lint and formatting changes no longer accept parameters of type Params
but only ExperimentalParams
. Also, the VisitorProvider parameter has been removed. Because of this, your integration with KtLint breaks. Based on feedback with ktlint 0.45.x, we now prefer to break at compile time instead of trying to keep the interface backwards compatible. Please raise an issue, in case you help to convert to the new API.
The interface UsesEditorConfigProperties
provides method getEditorConfigValue
to retrieve a named .editorconfig
property for a given ASTNode. When implementing this interface, the value editorConfigProperties
needs to be overridden. Previously it was not checked whether a retrieved property was actually recorded in this list. Now, retrieval of unregistered properties results in an exception.
Property Ktlint.DISABLED
has been removed. The property value can now be retrieved as follows:
astNode
.getEditorConfigValue(DefaultEditorConfigProperties.disabledRulesProperty)
.split(",")
and be supplied via the ExperimentalParams
as follows:
ExperimentalParams(
...
editorConfigOverride = EditorConfigOverride.from(
DefaultEditorConfigProperties.disabledRulesProperty to "some-rule-id,experimental:some-other-rule-id"
)
...
)
Property Ktlint.ANDROID_USER_DATA_KEY
has been removed. The property value can now be retrieved as follows:
astNode
.getEditorConfigValue(DefaultEditorConfigProperties.codeStyleProperty)
and be supplied via the ExperimentalParams
as follows:
ExperimentalParams(
...
editorConfigOverride = EditorConfigOverride.from(
DefaultEditorConfigProperties.codeStyleProperty to "android"
)
...
)
This property defaults to the official
Kotlin code style when not set.
An AssertJ style API for testing KtLint rules (#1444) has been added. Usage of this API is encouraged in favor of using the old RuleExtension API. For more information, see KtLintAssertThat API
- Add experimental rule for unexpected spacing between function name and opening parenthesis (
spacing-between-function-name-and-opening-parenthesis
) (#1341) - Add experimental rule for unexpected spacing in the parameter list (
parameter-list-spacing
) (#1341) - Add experimental rule for incorrect spacing around the function return type (
function-return-type-spacing
) (#1341) - Add experimental rule for unexpected spaces in a nullable type (
nullable-type-spacing
) (#1341) - Do not add a space after the typealias name (
type-parameter-list-spacing
) (#1435) - Add experimental rule for consistent spacing before the start of the function body (
function-start-of-body-spacing
) (#1341) - Suppress ktlint rules using
@Suppress
(more information) (#765) - Add experimental rule for rewriting the function signature (
function-signature
) (#1341)
- Move disallowing blank lines in chained method calls from
no-consecutive-blank-lines
to new rule (no-blank-lines-in-chained-method-calls
) (#1248) - Fix check of spacing in the receiver type of an anonymous function (#1440)
- Allow comment on same line as super class in class declaration
wrapping
(#1457) - Respect git hooksPath setting (#1465)
- Fix formatting of a property delegate with a dot-qualified-expression
indent
(#1340) - Keep formatting of for-loop in sync with default IntelliJ formatter (
indent
) and a newline in the expression in a for-statement should not force to wrap itwrapping
(#1350) - Fix indentation of property getter/setter when the property has an initializer on a separate line
indent
(#1335) - When
.editorconfig
settingindentSize
is set to valuetab
then return the default tab width as value forindentSize
(#1485) - Allow suppressing all rules or a list of specific rules in the entire file with
@file:Suppress(...)
(#1029)
- Update Kotlin development version to
1.7.0
and Kotlin version to1.7.0
. - Update shadow plugin to
7.1.2
release - Update picocli to
4.6.3
release - A file containing only one (non private) top level declaration (class, interface, object, type alias or function) must be named after that declaration. The name also must comply with the Pascal Case convention. The same applies to a file containing one single top level class declaration and one ore more extension functions for that class.
filename
(#1004) - Promote experimental rules to standard rules set:
annotation
,annotation-spacing
,argument-list-wrapping
,double-colon-spacing
,enum-entry-name-case
,multiline-if-else
,no-empty-first-line-in-method-block
,package-name
,traling-comma
,spacing-around-angle-brackets
,spacing-between-declarations-with-annotations
,spacing-between-declarations-with-comments
,unary-op-spacing
(#1481) - The CLI parameter
--android
can be omitted when the.editorconfig
propertyktlint_code_style = android
is defined
0.45.2 - 2022-04-06
- Resolve compatibility issues introduced in 0.45.0 and 0.45.1 (#1434). Thanks to mateuszkwiecinski and jeremymailen for your input on this issue.
- Set Kotlin development version to
1.6.20
and Kotlin version to1.6.20
.
0.45.1 - 2022-03-21
Minor release to fix a breaking issue with ktlint
API consumers
- Remove logback dependency from ktlint-core module (#1421)
0.45.0 - 2022-03-18
If you are not an API user nor a RuleSet provider, then you can safely skip this section. Otherwise, please read below carefully and upgrade your usage of ktlint. In this and coming releases, we are changing and adapting important parts of our API in order to increase maintainability and flexibility for future changes. Please avoid skipping a releases as that will make it harder to migrate.
This section is applicable when providing rules that depend on one or more values of ".editorconfig" properties. Property values should no longer be retrieved via EditConfig or directly via userData[EDITOR_CONFIG_USER_DATA_KEY]
. Property values should now only be retrieved using method ASTNode.getEditorConfigValue(editorConfigProperty)
of interface UsesEditorConfigProperties
which is provided in this release. Starting from next release after the current release, the EditConfig and/or userData[EDITOR_CONFIG_USER_DATA_KEY]
may be removed without further notice which will break your API or rule. To prevent disruption of your end user, you should migrate a.s.a.p.
- Add experimental rule for unexpected spaces in a type reference before a function identifier (
function-type-reference-spacing
) (#1341) - Add experimental rule for incorrect spacing after a type parameter list (
type-parameter-list-spacing
) (#1366) - Add experimental rule to detect discouraged comment locations (
discouraged-comment-location
) (#1365) - Add rule to check spacing after fun keyword (
fun-keyword-spacing
) (#1362) - Add experimental rules for unnecessary spacing between modifiers in and after the last modifier in a modifier list (#1361)
- New experimental rule for aligning the initial stars in a block comment when present (
experimental:block-comment-initial-star-alignment
(#297) - Respect
.editorconfig
propertyij_kotlin_packages_to_use_import_on_demand
(no-wildcard-imports
) (#1272) - Add new experimental rules for wrapping of block comment (
comment-wrapping
) (#1403) - Add new experimental rules for wrapping of KDoc comment (
kdoc-wrapping
) (#1403) - Add experimental rule for incorrect spacing after a type parameter list (
type-parameter-list-spacing
) (#1366) - Expand check task to run tests on JDK 17 - "testOnJdk17"
- Fix lint message to "Unnecessary long whitespace" (
no-multi-spaces
) (#1394) - Do not remove trailing comma after a parameter of type array in an annotation (experimental:trailing-comma) (#1379)
- Do not delete blank lines in KDoc (no-trailing-spaces) (#1376)
- Do not indent raw string literals that are not followed by either trimIndent() or trimMargin() (
indent
) (#1375) - Revert remove unnecessary wildcard imports as introduced in Ktlint 0.43.0 (
no-unused-imports
) (#1277), (#1393), (#1256) - (Possibly) resolve memory leak (#1216)
- Initialize loglevel in Main class after parsing the CLI parameters (#1412)
- Print the rule id always in the PlainReporter (#1121)
- All wrapping logic is moved from the
indent
rule to the new rulewrapping
(as part of thestandard
ruleset). In case you currently have disabled theindent
rule, you may want to reconsider whether this is still necessary or that you also want to disable the newwrapping
rule to keep the status quo. Both rules can be run independent of each other. (#835)
0.44.0 - 2022-02-15
Please welcome paul-dingemans as an official maintainer of ktlint!
- Use Gradle JVM toolchain with language version 8 to compile the project
- Basic tests for CLI (#540)
- Add experimental rule for unnecessary parentheses in function call followed by lambda (#1068)
- Fix indentation of function literal (#1247)
- Fix false positive in rule spacing-between-declarations-with-annotations (#1281)
- Do not remove imports for same class when different alias is used (#1243)
- Fix NoSuchElementException for property accessor (
trailing-comma
) (#1280) - Fix ClassCastException using ktlintFormat on class with KDoc (
no-trailing-spaces
) (#1270) - Do not remove trailing comma in annotation (#1297)
- Do not remove import which is used as markdown link in KDoc only (
no-unused-imports
) (#1282) - Fix indentation of secondary constructor (
indent
) (#1222) - Custom gradle tasks with custom ruleset results in warning (#1269)
- Fix alignment of arrow when trailing comma is missing in when entry (
trailing-comma
) (#1312) - Fix indent of delegated super type entry (
indent
) (#1210) - Improve indentation of closing quotes of a multiline raw string literal (
indent
) (#1262) - Trailing space should not lead to delete of indent of next line (
no-trailing-spaces
) (#1334) - Force a single line function type inside a nullable type to a separate line when the max line length is exceeded (
parameter-list-wrapping
) (#1255) - A single line function with a parameter having a lambda as default argument does not throw error (
indent
) (#1330) - Fix executable jar on Java 16+ (#1195)
- Fix false positive unused import after autocorrecting a trailing comma (#1367)
- Fix false positive indentation (
parameter-list-wrapping
,argument-list-wrapping
) (#897, #1045, #1119, #1255, #1267, #1319, #1320, #1337 - Force a single line function type inside a nullable type to a separate line when the max line length is exceeded (
parameter-list-wrapping
) (#1255)
- Update Kotlin version to
1.6.0
release - Add separate tasks to run tests on JDK 11 - "testOnJdk11"
- Update Dokka to
1.6.0
release - Apply ktlint experimental rules on the ktlint code base itself.
- Update shadow plugin to
7.1.1
release - Add Kotlin-logging backed by logback as logging framework (#589)
- Update Gradle to
7.4
version
0.43.2 - 2021-12-01
- KtLint CLI 0.43 doesn't work with JDK 1.8 (#1271)
0.43.0 - 2021-11-02
- New
trailing-comma
rule (#709) (prior art by paul-dingemans)
- Fix false positive with lambda argument and call chain (
indent
) (#1202) - Fix trailing spaces not formatted inside block comments (
no-trailing-spaces
) (#1197) - Do not check for
.idea
folder presence when usingapplyToIDEA
globally (#1186) - Remove spaces before primary constructor (
paren-spacing
) (#1207) - Fix false positive for delegated properties with a lambda argument (
indent
) (#1210) - (REVERTED in Ktlint 0.45.0) Remove unnecessary wildcard imports (
no-unused-imports
) (#1256) - Fix indentation of KDoc comment when using tab indentation style (
indent
) (#850)
- Support absolute paths for globs (#1131)
- Fix regression from 0.41 with argument list wrapping after dot qualified expression (
argument-list-wrapping
)(#1159) - Update Gradle to
7.2
version - Update Gradle shadow plugin to
7.1
version - Update Kotlin version to
1.5.31
version. Default Kotlin API version was changed to1.4
!
0.42.1 - 2021-08-06
Dot release to fix regressions in indent
rule introduced in 0.42.0 release. Thanks to t-kameyama for the fixes!
- Fix false positive with delegated properties (
indent
) (#1189) - Fix false positive with lambda argument in super type entry (
indent
) (#1188)
0.42.0 - 2021-07-29
Thank you to the following contributors for this release:
- SARIF output support (#1102)
- Remove needless blank lines in dot qualified expression (#1077)
- Fix false positives for SpacingBetweenDeclarationsWithAnnotationsRule (#1125)
- Fix false positive with eol comment (
annotation-spacing
) (#1124) - Fix KtLint dependency variant selection (#1114)
- Fix false positive with 'by lazy {}' (
indent
) (#1162) - Fix false positive with value argument list has lambda (
indent
) (#764) - Fix false positive in lambda in dot qualified expression (
argument-list-wrapping
) (#1112) - Fix false positive with multiline expression with elvis operator in assignment (
indent
) (#1165) - Ignore backticks in imports for ordering purposes (
import-ordering
) (#1106) - Fix false positive with elvis operator and comment (
chain-wrapping
) (#1055) - Fix false negative in when conditions (
chain-wrapping
) (#1130) - Fix the Html reporter Chinese garbled (#1140)
- Performance regression introduced in 0.41.0 (#1135)
- Updated to dokka 1.4.32 (#1148)
- Updated Kotlin to 1.5.20 version
0.41.0 - 2021-03-16
Note: This release contains breaking changes to globs passed to ktlint via the command line. See (#999) and the README.
Thank you to t-kameyama and paul-dingemans for your contributions to this release!
- New
ktlint_ignore_back_ticked_identifier
EditorConfig option formax-line-length
rule to ignore long method names inside backticks (primarily used in tests) (#1007) - Allow to add/replace loaded
.editorconfig
values viaExperimentalParams#editorConfigOverride
(#1016) ReporterProvider
,LintError
,RuleSetProvider
now implementSerializable
interface
- Incorrect indentation with multiple interfaces (#1003)
- Empty line before primary constructor is not reported and formatted-out (#1004)
- Fix '.editorconfig' generation for "import-ordering" rule (#1011)
- Fix "filename" rule will not work when '.editorconfig' file is not found (#997)
- EditorConfig generation for
import-ordering
(#1011) - Internal error (
no-unused-imports
) (#996) - Fix false positive when argument list is after multiline dot-qualified expression (
argument-list-wrapping
) (#893) - Fix indentation for function types after a newline (
indent
) (#918) - Don't remove the equals sign for a default argument (
no-line-break-before-assignment
) (#1039) - Fix internal error in
no-unused-imports
(#1040) - Fix false positives when declaration has tail comments (
spacing-between-declarations-with-comments
) (#1053) - Fix false positive after
else
keyword (argument-list-wrapping
) (#1047) - Fix formatting with comments (
colon-spacing
) (#1057) - Fix IndexOutOfBoundsException in
argument-list-wrapping-rule
formatting file with many corrections (#1081) - Fix formatting in arguments (
multiline-if-else
) (#1079) - Fix experimental:annotation-spacing-rule autocorrection with comments
- Migrate from klob dependency and fix negated globs passed to CLI are no longer worked (#999) Breaking: absolute paths globs will no longer work, check updated README
- Update Gradle shadow plugin to
6.1.0
version - Align with Kotlin plugin on how alias pattern is represented for imports layout rule (#753)
- Align with Kotlin plugin on how subpackages are represented (#753)
- Deprecated custom
kotlin_imports_layout
EditorConfig property. Please useij_kotlin_imports_layout
to ensure that the Kotlin IDE plugin and ktlint use same imports layout (#753) - Deprecated
idea
andascii
shortcuts as theij_kotlin_imports_layout
property does not support those. Please check README on how to achieve those with patterns (#753) - Update Gradle to
6.8.3
version - Update Kotlin to
1.4.31
version. Fixes #1063.
0.40.0 - 2020-12-04
Special thanks to t-kameyama for the huge number of bugfixes in this release!
- Initial implementation IDE integration via '.editorconfig' based on rules default values (#701)
- CLI subcommand
generateEditorConfig
to generate '.editorconfig' content for Kotlin files (#701) - A new capability to generate baseline and run ktlint against it with
--baseline
cli option (#707)
- Do not report when semicolon is before annotation/comment/kdoc and lambda (#825)
- Fix false positive when import directive has backticks and alias (#910)
@receiver
annotations with parameters are not required to be on a separate line (#885)- Fix false positive "File annotations should be separated from file contents with a blank line" in kts files (#914)
- Fix false positive
Missing newline after "->"
whenwhen
entry has a nested if/else block (#901) - Allow an inline block comment in
argument-list-wrapping
(#926) - Fix false positive for line-breaks inside lambdas in
argument-list-wrapping
(#861) (#870) - Fix wrong indentation inside an if-condition in
argument-list-wrapping
(#854) (#864) - Fix false positive for method after string template in
argument-list-wrapping
(#842) (#859) - Fix false positive when a comment is not between declarations in
spacing-between-declarations-with-comments
(#865) - Fix formatting with comments (
multiline-if-else
) (#944) - Do not insert unnecessary spacings inside multiline if-else condition (
indent
) (#871) (#900) - Correctly indent primary constructor parameters when class has multiline type parameter (
parameter-list-wrapping
) (#921) (#938) - Correctly indent property delegates (
indent
) (#939) - Fix false positive for semicolon between empty enum entry and member (
no-semicolons
) (#957) - Fix wrong indentation for class delegates (
indent
) (#960) (#963) (#877) - Fix wrong indentation in named arguments (
indent
) (#964) - Fix wrong indentation when a function has multiline type arguments (
parameter-list-wrapping
) (#965) - Fix false positive for
spacing-between-declarations-with-annotations
(#970) - Fix ParseException when an assigment contains comments (
no-line-break-before-assignment
) (#956) - Fix false positive when right brace is after a try-catch block (
spacing-around-keyword
) (#978) - Fix false positive for control flow with empty body (
no-semicolons
) (#955) - Fix incorrect indentation for multi-line call expressions in conditions (
indent
) (#959) - Fix false positive for trailing comma before right parentheses|bracket|angle (
spacing-around-comma
) (#975) - Fix ktlint CLI could skip checking some of explicetly passed files (#942)
- 'import-ordering' now supports `.editorconfig' default value generation (#701)
- Update Gradle to
6.7.1
version
0.39.0 - 2020-09-14
- Add new applyToIDEA location for IDEA 2020.1.x and above on MacOs
- Debug output: print loaded .editorconfig content
- Extract
argument-list-wrapping
rule into experimental ruleset - Split
annotation-spacing
into separate experimental rule
- Do not enforce raw strings opening quote to be on a separate line (#711)
- False negative with multiline type parameter list in function signature for
parameter-list-wrapping
(#680) - Alternative
.editorconfig
path is ignored on stdin input (#869) - False positive with semicolons before annotations/comments/kdoc (#825)
- Do not report when string-template expression is a keyword (#883)
- False positive for subclass imports in
no-unused-imports
(#845) - False positive for static java function imports in
no-unused-imports
(#872) - Missing signature for KtLint CLI artifact published to Github release (#895)
- Crash in annotation rule (#868)
- False-positive unused import violation (#902)
Ktlint
object internal code cleanup- Deprecate some of public methods in
Ktlint
object that should not be exposed as public api - Update Kotlin to 1.4.10 version
- Make
RuleSet
class open so it can be inherited
0.38.1 - 2020-08-24
Minor release to support projects using mixed 1.3/1.4 Kotlin versions (e.g. Gradle plugins)
- Compile with
apiLevel = 1.3
0.38.0 - 2020-08-21
New release with Kotlin 1.4.0 support and several enhancements and bugfixes.
- Experimental SpacingAroundAngleBracketsRule (#769)
- Checksum generation for executable Jar (#695)
- Enable Gradle dependency verification
parameter-list-wrapping
rule now also considers function arguments while wrapping (#620)- Publish snapshots built against kotlin development versions
- Initial support for tab-based indentation (#128)
- Safe-called wrapped trailing lambdas indented correctly (#776)
provideDelegate
imports are not marked as unused anymore (#669)- Set continuation indent to 4 in IDE integration codestyle (#775)
- No empty lines between annotation and annotated target (#688)
- Unused imports reported correctly (#526) (#405)
- No false empty lines inserted in multiline if-else block (#793)
- No-wildcard-imports properly handles custom infix function with asterisk (#799)
- Do not require else to be in the same line of a right brace if the right brace is not part of the if statement (#756)
- Brace-less if-else bodies starting with parens indented correctly (#829)
- If-condition with multiline call expression inside indented correctly (#796)
- Update Gradle to 6.6 version
- Update ec4j to 0.2.2 version. Now it should report path to
.editorconfig
file on failed parsing and allow empty.editorconfig
files. - Update Kotlin to 1.4.0 version (#830)
0.37.2 - 2020-06-16
Minor release to fix further bugs in ImportOrderingRule
.
- Imports with aliases no longer removed (#766)
0.37.1 - 2020-06-08
Minor release to fix some bugs in the 0.37.0 release.
- Invalid path exception error on Windows machines when loading properties from .editorconfig (#761)
- Imports with
as
no longer removed (#766) - The contents of raw strings are no longer modified by the indent rule (#682)
0.37.0 - 2020-06-02
Thank you to Tapchicoma and romtsn for all their hard work on this release!
- Gradle wrapper validation (#684)
- Experimental
SpacingAroundDoubleColon
rule (#722] - Experimental
SpacingBetweenDeclarationsWithCommentsRule
andSpacingBetweenDeclarationsWithAnnotationsRule
. Fixes ([#721]pinterest#721) kotlin_imports_layout
config for.editorconfig
file so that import ordering is configurable. Fixes (#527)
- Kotlin was updated to 1.3.70 version
- Loading properties from
.editorconfig
was fully delegated to ec4j library. This fixes ability to override properties for specific files/directories (#742) - Promote experimental "indent" rule to standard one, old standard "indent" rule is removed
- Functions to calculate line/column are now public so they can be used by 3rd party tools (#725)
AnnotationRule
now handles file annotations as well (#714)
- Ignore keywords in KDoc comments (#671)
- Allow multiple spaces in KDoc comments (#706)
- Trailing comment no longer reported as incorrect indentation (#710]
- Annotated function types no longer reported as an error (#737)
FinalNewlineRule
no longer reports error for empty files (#723)- EOL comments will no longer cause
AnnotationRule
to report an error (#736) - Formatter will no longer break class declaration with trailing comment (#728)
- Formatting for single line if/else statements (#174)
- Exception in
NoLineBreakBeforeAssignmentRule
(#693)
- Removed Maven; builds all run under Gradle (#445)
- Old standard
IndentRule
0.36.0 - 2019-12-03
- HTML reporter (#641)
- Experimental rule to lint enum entry names (#638)
@Suppress("RemoveCurlyBracesFromTemplate")
now respected (#263)
.git
directory now discovered instead of hardcoded (#623)- Several bugs with the experimental annotation rule (#628) (#642) (#654) (#624)
- Allow newline after lambda return type (#643)
- Allow empty first line in a function that returns an anonymous object (#655)
- Indentation with lambda argument (#627)
- ktlint can now lint UTF-8 files with BOM (#630
- Indentation with newline before return type (#663)
- Build/tests on Windows (#640)
- Allow whitespace after
(
followed by a comment (#664)
0.35.0 - 2019-10-12
- Support for specifying color for output via
--color-name
command line flag. (#585) - Support for custom rulesets and providers on Java 9+ (#573)
--apply-to-idea
flag; useapplyToIDEA
subcommand instead (#554)--apply-to-idea-project
flag; useapplyToIDEAProject
subcommand instead (#593)0.0.0-SNAPSHOT
builds; snapshot builds are now versioned, e.g. 0.35.0-SNAPSHOT (#588)- Note: When using the new snapshot builds, you may need to add an explicit dependency on
kotlin-compiler-embeddable
to your ruleset project.
- Note: When using the new snapshot builds, you may need to add an explicit dependency on
- Support for loading 3rd party rulesets via Maven (#566)
- Bugs with spacing in experimental
AnnotationRule
(#552) (#601 - Brackets would be removed from empty companion object (#600)
- Bugs with experimental
IndentationRule
(#597) (#599) - Erroneous space between
}
and]
(#596) - Spacing around multiplication sign in lambdas (#598)
--version
output with gradle-built JAR (#613)
0.34.2 - 2019-07-22
Minor bugfix release for 0.34.0. (Note: 0.34.1 deprecated/deleted due to regression in disabled_flags .editorconfig support.)
- Support for globally disabling rules via
--disabled_rules
command line flag. (#534)
- Regression with
--stdin
flag forprintAST
command (#528) - Regressions with
NoUnusedImports
rule (#531, #526)- Note: this re-introduces #405
- Indentation for enums with multi-line initializers (#518)
0.34.0 - 2019-07-15
- Support for Kotlin 1.3.41
- Support for globally disabling rules via custom
disabled_rules
property in.editorconfig
(#503) experimental:no-empty-first-line-in-method-block
(#474)- Unit tests for ruleset providers
- AssertJ from 3.9.0 to 3.12.2 (#520)
- Final newline by default (#446)
no-wildcard-import
(Re-enabled after temporarily disabling in 0.33.0)experimental:annotation
(#509)experimental:multiline-if-else
(no autocorrection)experimental:package-name
(currently only disallows underscores in package names)
MavenDependencyResolver
. Scheduled to be removed in 0.35.0 (#468)--install-git-pre-commit-hook
flag; useinstallGitPreCommitHook
subcommand instead (#487)--print-ast
flag; useprintAST
subcommand instead (#500)
- Support for
--ruleset-repository
and--ruleset-update
flags
import-ordering
will now refuse to format import lists that contain top-level comments (#408)no-unused-imports
reporting false negatives or false positives in some cases (#405) and (#506)experimental:indent
incorrectly formatting a lambda's closing brace (#479)
0.33.0 - 2019-05-28
- Support for Kotlin 1.3.31
- No wildcard imports rule (#48). Developers wishing to still enforce this rule should add the code into a custom ruleset.
- Spec file parsing is now platform-agnostic (#365)
- Unnecessary newline after
->
in some cases (#403) SpacingAroundCommaRule
will no longer move code into comments- Made newlines after
=
less aggressive (#368) (#380) - Erroneous newline when parameter comments are used (#433)
0.32.0 - 2019-04-22
experimental/import-ordering
rule (#189). Usektlint --experimental
to enabled.- Support for Kotlin 1.3.30
- Build now compatible with jitpack
ktlint
now part of Homebrew core (shyiko/ktlint
tap deprecated)
- Incorrectly flagging a missing newline for functions with no parameters (#327).
- Semicolons now allowed in KDocs (#362).
- Spaces now disallowed after
super
(#369). - Annotations in function parameters now checked for indentation (#374]
- Code now lives in
com.pinterest
package - groupId now
com.pinterest
- Custom ruleset
META-INF.services
file must be renamed tocom.pinterest.ktlint.core.RuleSetProvider
0.31.0 - 2019-03-10
- Spacing check around
<
&>
operators.
no-multi-spaces
rule (horizontal alignment of comments is no longer allowed) (#269).colon-spacing
rule (:
must not appear at the beginning of the line).package-name
rule (disabled until #208 is resolved).--print-ast
to output com.pinterest.ktlint.core.ast.ElementType.* asnode.elementType
, e.g.
$ echo 'fun f() {}' | ./ktlint/target/ktlint --print-ast --color --stdin
1: ~.psi.KtFile (FILE)
1: ~.psi.KtPackageDirective (PACKAGE_DIRECTIVE) ""
1: ~.psi.KtImportList (IMPORT_LIST) ""
1: ~.psi.KtScript (SCRIPT)
1: ~.psi.KtBlockExpression (BLOCK)
1: ~.psi.KtNamedFunction (FUN)
1: ~.c.i.p.impl.source.tree.LeafPsiElement (FUN_KEYWORD) "fun"
1: ~.c.i.p.impl.source.tree.PsiWhiteSpaceImpl (WHITE_SPACE) " "
1: ~.c.i.p.impl.source.tree.LeafPsiElement (IDENTIFIER) "f"
1: ~.psi.KtParameterList (VALUE_PARAMETER_LIST)
1: ~.c.i.p.impl.source.tree.LeafPsiElement (LPAR) "("
1: ~.c.i.p.impl.source.tree.LeafPsiElement (RPAR) ")"
1: ~.c.i.p.impl.source.tree.PsiWhiteSpaceImpl (WHITE_SPACE) " "
1: ~.psi.KtBlockExpression (BLOCK)
1: ~.c.i.p.impl.source.tree.LeafPsiElement (LBRACE) "{"
1: ~.c.i.p.impl.source.tree.LeafPsiElement (RBRACE) "}"
1: ~.c.i.p.impl.source.tree.PsiWhiteSpaceImpl (WHITE_SPACE) "\n"
format: <line_number:> <node.psi::class> (<node.elementType>) "<node.text>"
legend: ~ = org.jetbrains.kotlin, c.i.p = com.intellij.psi
kotlin-compiler
version to 1.3.21 (from 1.3.20).
- Dependency on JCenter (#349).
0.30.0 - 2019-02-03
Missing newline before ")"
(#327).
kotlin-compiler
version to 1.3.20 (from 1.2.71) (#331).
--ruleset
/--reporter
switched to HTTPS (#332).
0.29.0 - 2018-10-02
no-semi
rule to preserve semicolon aftercompanion object;
(see #281 for details).- "line number off by one" when
end_of_line=CRLF
is used (#286).
package-name
rule not to check file location (until #280 can be properly addressed).comment-spacing
rule not to flag//region
&//endregion
comments (#278).kotlin-compiler
version to 1.2.71 (from 1.2.51).
0.28.0 - 2018-09-05
- ktlint hanging in case of unhandled exception in a reporter (#277).
package-name
rule (directories containing.
in their names are no longer considered to be invalid) (#276).
0.27.0 - 2018-08-06
- ktlint output (report location is now printed only if there are style violations) (#267).
0.26.0 - 2018-07-30
max-line-length
rule (multi-line strings are no longer checked) (#262).
0.25.1 - 2018-07-25
json
reporter \ and control characters escaping (#256).
0.25.0 - 2018-07-25
package-name
rule (#246).--editorconfig=path/to/.editorconfig
(#250).- Support for
end_of_line=native
(.editorconfig
) (#225). tab -> space * indent_size
auto-correction (--format
/-F
).
- "Unnecessary semicolon" false positive (#255).
(cannot be auto-corrected)
reporting.- OOM in
--debug
mode while trying to printroot=true <- root=false
.editorconfig
chain.
kotlin-compiler
version to 1.2.51 (from 1.2.50).
0.24.0 - 2018-06-22
paren-spacing
rule (#223).- Report location output (#218, #224).
- An indication that some lint errors cannot be auto-corrected (#219).
- Git hook to automatically check files for style violations on push (an alternative to existing
ktlint --install-git-pre-commit-hook
)
(executektlint --install-git-pre-push-hook
to install) (#229). - Support for
end_of_line=crlf
(.editorconfig
) (#225).
.editorconfig
path resolution
(you no longer need to be inside project directory for.editorconfig
to be loaded) (#207).- NPE in case of I/O error (klob@0.2.1).
comment-spacing
rule to exclude//noinspection
(#212).kotlin-compiler
version to 1.2.50 (from 1.2.41) (#226).
0.23.1 - 2018-05-04
ClassCastException: cannot be cast to LeafPsiElement
(#205).
0.23.0 - 2018-05-02
comment-spacing
(#198),
filename
(#194) rules.parameter-list-wrapping
left parenthesis placement check (#201).parameter-list-wrapping
auto-correction whenmax_line_length
is exceeded (#200).
- "Unused import" false positive (x.y.zNNN import inside x.y.z package) (#204).
kotlin-compiler
version to 1.2.41 (from 1.2.40).
0.22.0 - 2018-04-22
--apply-to-idea-project
(as an alternative to (global)--apply-to-idea
) (#178).- Check to verify that annotations are placed before the modifiers (#183).
- Access to PsiFile location information (#194).
--format
commenting out operators (chain-wrapping
rule) (#193).
indent
rule (continuation_indent_size
is now ignored) (#171).
NOTE: if you have a customcontinuation_indent_size
(andgcd(indent_size, continuation_indent_size) == 1
) ktlint won't check the indentation.--apply-to-idea
to inherit "Predefined style / Kotlin style guide" (Kotlin plugin 1.2.20+).kotlin-compiler
version to 1.2.40 (from 1.2.30).
0.21.0 - 2018-03-29
indent
rule to ignorewhere <type constraint list>
clause (#180).
0.20.0 - 2018-03-20
- Ability to load 3rd party reporters from the command-line (e.g.
--reporter=<name>,artifact=<group_id>:<artifact_id>:<version>
) (#176). --ruleset
/--reporter
dependency tree validation.
- Handling of spaces in
--reporter=...,output=<path_to_a_file>
(#177). +
,-
,*
,/
,%
,&&
,||
wrapping (#168).
comma-spacing
rule to be more strict (#173).no-line-break-after-else
rule to allow multi-lineif/else
without curly braces.
0.19.0 - 2018-03-04
- Lambda formatting: if lambda is assigned a label, there should be no space between the label and the opening curly brace (#167).
0.18.0 - 2018-03-01
- Java 9 support (#152).
kotlin-compiler
version to 1.2.30 (from 1.2.20).
0.17.1 - 2018-02-28
Internal Error (parameter-list-wrapping)
whenindent_size=unset
(#165).
0.17.0 - 2018-02-28
+
/-
wrapping insidecatch
block, afterelse
andif (..)
(#160).- Multi-line parameter declaration indentation (#161).
- Expected indentation reported by
indent
rule.
- Error code returned by
ktlint --format/-F
when some of the errors cannot be auto-corrected (previously it was 0 instead of expected 1) (#162).
0.16.1 - 2018-02-27
- Handling of negative number condition in
when
block (#160).
0.16.0 - 2018-02-27
parameter-list-wrapping
rule (#130).+
,-
,*
,/
,%
,&&
,||
wrapping check (now part ofchain-wrapping
rule).
- Unused
componentN
import (where N > 5) false positive (#142). - max-line-length error suppression (#158).
modifier-order
rule to match official Kotlin Coding Conventions (#146)
(override
modifier should be placed beforesuspend
/tailrec
, not after)
0.15.1 - 2018-02-14
- Race condition when multiple rules try to modify AST node that gets detached as a result of mutation (#154).
0.15.0 - 2018-01-18
no-line-break-after-else
rule (#125).
kotlin-compiler
version to 1.2.20 (from 1.2.0).
0.14.0 - 2017-11-30
continuation_indent_size
to 4 when--android
profile is used (android/kotlin-guides#37).
- Maven integration (#117).
0.13.0 - 2017-11-28
no-line-break-before-assignment
(#105),
chain-wrapping
(#23) (when wrapping chained calls.
,?.
and?:
should be placed on the next line),
range-spacing
(no spaces around range (..
) operator) rules.--print-ast
CLI option which can be used to dump AST of the file
(see README / Creating a ruleset / AST for more details)--color
CLI option for colored output (where supported, e.g. --print-ast, default (plain) reporter, etc)
.editorconfig
property resolution.
An explicit[*.{kt,kts}]
is not required anymore (ktlint looks for sections containing*.kt
(or*.kts
) and will fallback to[*]
whenever property cannot be found elsewhere).
Also, a search for .editorconfig will no longer stop on first (closest).editorconfig
(unless it containsroot=true
).max-line-length
rule to assumemax_line_length=100
whenktlint --android ...
is used
(per Android Kotlin Style Guide).kotlin-compiler
version to 1.2.0 (from 1.1.51).
no-empty-class-body
auto-correction at the end of file (#109).max-line-length
rule when applied to KDoc (#112)
(previously KDoc was subject tomax-line-length
even though regular comments were not).- Spacing around
=
in @annotation|s (op-spacing
). - Spacing around generic type parameters of functions (e.g.
fun <T>f(): T {}
->fun <T> f(): T {}
). no-consecutive-blank-lines
not triggering at the end of file (when exactly 2 blank lines are present) (#108)indent
continuation_indent_size % indent_size != 0
case (#76)indent
rule skipping first parameter indentation check.final-newline
rule in the context of kotlin script.- Git hook (previously files containing space character (among others) in their names were ignored)
- Exit code when file cannot be linted due to the invalid syntax or internal error.
0.12.1 - 2017-11-13
- A conflict between
org.eclipse.aether:aether-*:1.1.0
andorg.eclipse.aether:aether-*:1.0.0.v20140518
(#100).
0.12.0 - 2017-11-10
--android
(-a
) CLI option (turns on Android Kotlin Style Guide compatibility)
(right now it's used only byktlint --apply-to-idea
).
ktlint --apply-to-idea
to account forindent_size
&continuation_indent_size
in.editorconfig
(if any).
ktlint-intellij-idea-integration
binary (deprecated in 0.9.0).
- "Unused import" false positive (
component1
..component5
).
0.11.1 - 2017-10-26
--reporter
'soutput
handling (previously parent directory was expected to exist) (#97).
0.11.0 - 2017-10-25
no-blank-line-before-rbrace
rule (#65).
- Redundant space inserted between
}
and::
(curly-spacing).
0.10.2 - 2017-10-25 [YANKED]
This release contains changes that were meant for 0.11.0 and so it was retagged as such.
0.10.1 - 2017-10-22
- Redundant space inserted between
}
and[key]
/(...)
(curly-spacing) (#91).
0.10.0 - 2017-10-10
- Git hook to automatically check files for style violations on commit
(executektlint --install-git-pre-commit-hook
to install). - Ability to specify multiple reporters
(output can be controlled with--reporter=<name>,output=<path/to/file>
) (#71). - Support for
indent_size=unset
(.editorconfig
) (#70).
( {
formatting
(previously both( {
and({
were accepted as correct, while only({
should be) (curly-spacing
rule) (#80).if\nfn {}\nelse
formatting (curly-spacing
rule).max_line_length=off
&max_line_length=unset
handling (.editorconfig
).
kotlin-compiler
version to 1.1.51 (from 1.1.3-2).ktlint --apply-to-idea
to includeOPTIMIZE_IMPORTS_ON_THE_FLY=true
.
0.9.2 - 2017-09-01
: Unit =
formatting (: Unit
is no longer dropped when=
is used) (#77).
0.9.1 - 2017-07-30
${super.toString()}
linting (string-template
rule) (#69).
0.9.0 - 2017-07-23
- Reporter API.
ktlint
comes with 3 built-in reporters:plain
(default;?group_by_file
can be appended to enable grouping by file (shown below)),json
andcheckstyle
.
$ ktlint --reporter=plain?group_by_file
path/to/file.kt
1:10 Unused import.
2:10 Unnecessary "Unit" return type.
path/to/another-file.kt
1:10 Unnecessary semicolon.
- string-template,
no-empty-class-body,
max-line-length (#47),
final-newline (activated only ifinsert_final_newline
is set in.editorconfig
(under[*.{kt,kts}]
)) rules. --limit
CLI option (e.g. use--limit=10
to limit the number of errors to display).--relative
CLI flag which makesktlint
output file paths relative to working directory (e.g.dir/file.kt
instead of/home/269/project/dir/file.kt
).
- BREAKING: JDK version to 1.8 (as a result of upgrading
kotlin-compiler
to 1.1.3-2 (from 1.1.0)). - File matching (offloaded to klob).
--ruleset-repository
and--ruleset-update
CLI arguments in favour of--repository
and--repository-update
respectively (--ruleset-*
will be removed in 1.0.0).ktlint-intellij-idea-integration
binary
(Intellij IDEA integration task is now included inktlint
(asktlint --apply-to-idea
)).
0.8.3 - 2017-06-19
- "Missing spacing after ";"" at the end of package declaration (#59).
- "Unused import" false positive (
setValue
) (#55). get
/set
ter spacing (#56).
0.8.2 - 2017-06-06
- "Unused import" false positive (
getValue
) (#54).
0.8.1 - 2017-05-30
ktlint --stdin
(#51).
0.8.0 - 2017-05-30
- .editorconfig support (right now only
indent_size
is honored and only if it's set in[*{kt,kts}]
section). - Support for vertically aligned comments (see NoMultipleSpacesRuleTest.kt).
- ktlint-ruleset-standard ("no-unit-return" & "modifier-order" where not included).
0.7.1 - 2017-05-29
- Triggering of "Unused import" when element is referenced in KDoc(s) only (#46).
0.7.0 - 2017-05-28
- no-unit-return rule.
- modifier-order rule (#42).
else/catch/finally
on the same line as}
check (now part of "keyword-spacing" rule).ktlint-intellij-idea-integration
binary for easy Intellij IDEA config injection.
0.6.2 - 2017-05-22
- Unused "iterator" extension function import false positive (#40).
0.6.1 - 2017-03-06
- Detection of unnecessary "same package" imports (no-unused-imports).
- FileNotFoundException while scanning FS (#36).
0.6.0 - 2017-03-01
kotlin-compiler
version to 1.1.0 (from 1.1-M04).
0.5.1 - 2017-02-28
- Unnecessary spacing around angle brackets in case of
super<T>
(#34).
0.5.0 - 2017-02-20
- Redundant space inserted between
}
and!!
(curly-spacing).
indent
rule to allow "Method declaration parameters -> Align when multiline" (as this option is (unfortunately) "on" by default in Intellij IDEA) (#26).
0.4.0 - 2017-02-01
- NPE in case of "Permission denied" (while scanning the file system).
kotlin-compiler
version to 1.1-M04 (from 1.0.6).
0.3.1 - 2017-01-25
- Unused infix function call import false positive (#25).
0.3.0 - 2017-01-11
*.kts
(script) support.
kotlin-compiler
version to 1.0.6 (from 1.0.3).
0.2.2 - 2016-10-11
no-wildcard-imports
rule (kotlinx.android.synthetic excluded from check) (#16).
0.2.1 - 2016-09-13
curly-spacing
false negative in case of}?.
.
0.2.0 - 2016-09-05
- Support for 3rd party "ruleset"s.
ktlint -F
output (it now includes lint errors that cannot be fixed automatically).
ktlint -F --debug
error count.- Glob implementation (previously it was prone to catastrophic backtracking).
- Redundant semicolon false positive in case of enum (#12).
- Unused operator import false positive (#13).
0.1.2 - 2016-08-05
- "in-use" escaped imports detection (#7) (no-unused-imports).
0.1.1 - 2016-08-01
- Incorrect spacing around curly braces (curly-spacing).