2.0.0

Dokka 2.0.0 focuses on simplifying configuration and preparing for support of future Kotlin language features. Key highlights include:

• Dokka Gradle Plugin v2: revamped Gradle plugin based on Dokkatoo.
• Experimental K2 Analysis: support for K2 compiler frontend.
• HTML Improvements: better accessibility and easier customization.

More details about each of the changes below. See Dokka 2.0.0 milestone for the list of all changes.

Dokka's Gradle plugin v2 based on Dokkatoo

Please check the migration guide for the update procedure and give feedback!

Dokka 2.0.0 introduces significant improvements to Dokka Gradle plugin, aligning more closely with Gradle best practices:

• Adopts Gradle types, which leads to better performance.
• Uses an intuitive top-level DSL configuration instead of a low-level task-based setup, which simplifies the build scripts and their readability.
• Takes a more declarative approach to documentation aggregation, which makes multi-project documentation easier to manage.
• Uses a type-safe plugin configuration, which improves the reliability and maintainability of your build scripts.
• Fully supports Gradle configuration cache and build cache, which improves performance and simplifies build work.

Changes from Dokka 2.0.0-Beta

• Forward Dokka Generator messages to Gradle logger (#3833)
• Add deprecated property to help migrate from JSON Dokka plugin configuration (#3877)
• Rename dokkaPublicationDirectory to basePublicationsDirectory (#3876)
• Rename dokkaModuleDirectory, and mark as internal (#3880)
• Update and add KDoc for DGPv2 (#3842)
• Remove DokkaPluginParametersBuilder (#3872)
• Increase default max heap of Worker to 2G (#3913)
• Remove the dependency of dokkaGenerate on dokkaGenerateModule* (#3920)
• KT-71784 Fix classpath for KMP shared source sets (#3942)
• Fix DGP/KMP integration, so Dokka can 'see' code from shared source sets in target source sets (#3814)

Dokka's K2 analysis

Dokka 2.0.0 introduces K2 analysis, which is currently in an experimental stage. Dokka's K2 analysis leverages Kotlin's K2 compiler frontend for analysing code and uses the same shared Analysis API, which is used in IntelliJ IDEA’s K2 mode. The output with K2 analysis should mostly match that of K1 analysis, but there may be minor differences. We are actively working towards stabilizing K2 analysis and are planning to enable K2 analysis by default in future.

To opt in to Dokka's K2 analysis, add the following flag to your project's gradle.properties file:

org.jetbrains.dokka.experimental.tryK2=true

Known limitations:

• Intersecting source roots (#3701) and intersecting sample roots (#3373) may cause issues.
• Kotlin/JS libraries compiled with the legacy Kotlin/JS compiler are not supported (#3751).

We would greatly value your feedback if you encounter any of these limitations.

Potential differences between the outputs of K1 and K2:

While the output of K2 analysis aims to align with K1, there are some differences to be aware of:

• Java synthetic properties: rendering may vary (details).
• KDoc links: resolution and rendering differences (details).
• Inconsistent documentable rendering order (#3590).
• Enum entries: anonymous and overridden methods are no longer rendered (#3129).
• Other differences may arise due to variations in type inference between K1 and K2.

HTML format

Dokka 2.0.0 introduces some changes to HTML output. We updated the structure of some elements and classes, particularly in the navigation and sidebar, to improve accessibility and simplify maintenance. These changes only affect you if you previously customized Dokka styles.

• We removed redundant wrappers like navigation--inner and navigation-title.
• We reworked blocks such as versions-dropdown to make them more accessible.
• We renamed classes like navigation-controls--homepage to improve consistency. For example, it’s now called navigation-controls--btn_homepage.

For more information, see the pull request.

The easiest way to update your current templates is to adjust the new templates to your needs.

Bugfixes

• Fix merging expect-actual declarations (#3875)

Other changes

• Update the external link URL for stdlib (#3938)

Feedback

We would appreciate your feedback!

• Please report any feedback or problems https://kotl.in/dokka-issues
• Chat with the community visit #dokka in https://kotlinlang.slack.com/ (To sign up visit https://kotl.in/slack)

Full Changelog: v1.9.20...v2.0.0

2.0.0-Beta

Dokka's Gradle plugin v2 based on Dokkatoo

Please check the migration guide for the update procedure and give feedback!

DGP v2 introduces significant improvements to DGP, aligning more closely with Gradle best practices:

• Adopts Gradle types, which leads to better performance.
• Uses an intuitive top-level DSL configuration instead of a low-level task-based setup, which simplifies the build scripts and their readability.
• Takes a more declarative approach to documentation aggregation, which makes multi-project documentation easier to manage.
• Uses a type-safe plugin configuration, which improves the reliability and maintainability of your build scripts.
• Fully supports Gradle configuration cache and
  build cache, which improves performance and simplifies build work.

Note: org.jetbrains.dokka-javadoc is not yet published to Maven Central and is only available via Gradle Plugin Portal

HTML format

• Fix overflow of long underscore separated names in HTML (#3240). Thanks to @seelchen!
• Accessibility: Wrap links and code blocks (#3415). Thanks to @lauzadis!
• Accessibility: add outline when section-tab is focused (#3416). Thanks to @lauzadis!
• fix: made tabs work when open via iframe (#3323)
• Fixed theme switcher on root page of multimodule project (#3616)
• HTML rendering memory allocations optimisation (#3800)

Bugfixes

• Fix checking for annotations when rendering constructor keyword (#3523)
• Fix KDoc and Javadoc link to a package (#3490)
• Handle exception for recursive type aliases (#3582)
• Do not show the override modifier for fake overrides (#3696)
• Display Java's Deprecated message (#3421)

Other changes

• Fix for broken link, typo, and sample code (#3532). Thanks to @LiYing2010!
• Remove <a href="TODO"> in enum constant summary (#3548). Thanks to @MattiasBuelens!
• Remove log4j coming from intellij dependencies (#3592)
• Replace Path.toRealPath in K1 analysis to improve performance a bit (#3608)
• Support specifying custom folder name for older versions for versioning plugin (#3693)
• Fix links in nested class summary not resolved correctly (#3674). Thanks to @MattiasBuelens!
• Filter out JVM mapped methods (#3694)

Feedback

We would appreciate your feedback!

• Please report any feedback or problems https://kotl.in/dokka-issues
• Chat with the community visit #dokka in https://kotlinlang.slack.com/ (To sign up visit https://kotl.in/slack)

Full Changelog: v1.9.20...v2.0.0-Beta

1.9.20

General bugfixes

• Fixed sealed interfaces not having the sealed keyword in signatures (#2994)
• Fixed incorrect links in multi-module projects with non-unique package names (#2272). Huge thanks to @EddieRingle!
• Fixed member extensions not being shown on index pages in certain scenarios (#3187)
• Fixed Java's inner classes not having the inner keyword in Kotlin signatures (#2793)
• Fixed Java's @param tag not working with type parameters (#3199)
• Fixed Dokka failing in KMP projects when the JVM source set is suppressed (#3209)

HTML format

• Provide an ability to add a custom homepage link to the header, more details in #2948 (comment)
• Fixed tab selection resetting after navigating to a different page (#2899)
• Fixed inline code not always being aligned with the surrounding text (#3228)
• Fixed the "No options found" text in search being barely visible (#3281)
• Fixed empty HTML tags being rendered for no reason (#3343, #3095)

Runners

Gradle Plugin

• Mark tasks as not compatible with Gradle configuration cache, second try (#3438). Thanks to @3flex for noticing and fixing the problem!

Maven Plugin

• Fixed dokka:help being absent (#3035). Thanks to @aSemy!
• Fixed the source links configuration not working (#3046). Thanks to @freya022 for fixing this one!

CLI runner

• Allow using relative paths in the sourceRoots configuration option (#2571)

Plugin API

• Provide an extension point to customize the rendering of code blocks in HTML format (#3244)

Other:

• Make sure wasm-js and wasm-wasi targets introduced in Kotlin 1.9.20 are supported (#3310)
• Avoid concurrent invocations of Kotlin compiler's API due to the compiler API itself not always being thread safe (#3151). No noticeable performance loss is expected.
• Bump dependencies to the latest versions (#3231, #3206, #3204)
• Fix a documentation link (#3213). Thanks to @SubhrajyotiSen for noticing and fixing it!
• Various build and project structure improvements (#3174, #3132). Enormous thanks to @aSemy for the help!

See Dokka 1.9.20 milestone for the list of all changes.

1.9.10

General

• Fix re-emerged code analysis concurrency issues which led to flaky builds (#1599, #3143)
• Preserve the order of collection items when deserializing Dokka's configuration (#3006). Thanks to @eunwoop!

HTML format

• Fix an indefinite loop in the script that resizes symbol signature blocks (#3116)

Gradle

• Fix resolution of platform dependencies for Kotlin 1.9 / Gradle 8 (#3153, #3147)
• Mark tasks as not compatible with the Gradle configuration cache (#3070). Thanks to @BoD!

Java

• Fix Java contravariant types being represented as covariant (#3091). Thanks to @juliamcclellan!

1.9.0

General improvements

• Generate dedicated pages for type aliases and enhance their presentation (#2862, #2971)
• Add documentation for Enum.entries introduced in Kotlin 1.9.0 (#2762)

HTML format

This release is packed with enhancements and bugfixes that make your API reference docs mobile-friendly!

You may find it a weird direction for improvement — we were just as surprised to find that almost 1/4 of Standard Library's API reference traffic is coming from mobile devices. Thanks to the Kotlin Website team, who contributed these improvements, Dokka now provides a solid experience to such visitors.

Improvements:

• Significantly improve the mobile layout and overall responsiveness (#2836, #3021, #3082, #3018)
• Use JetBrains Sans as the primary text font (#3017)
• Improve the experience of reading the documentation when JavaScript is disabled in the browser (#3020, #2836)

Bugfixes

• Fix a redundant dot in the path of search elements (#2289)
• Fix unknown asset paths leaking into HTML body (#3061)
• Fix invisible/hidden packages for modules with a space in the name (#3011)

Java interoperability

• Fix multi-param methods being classified as field setters (#2992)

Javadoc format

• Add basic support for @author, @since and @return tags (#1770). Thanks to @irina-turova!

Other

• Decompose Kotlin/Java analysis (#3034)
• Improve copying base-frontend files between subprojects (#2970). Thanks to @aSemy!

---

Known problems

Some Multiplatform Gradle 8 projects might experience build failures when resolving native/platform dependencies. Please, see #3153 for more details and workarounds.

Breaking changes

This release introduces some breaking changes that are expected to affect only a fraction of Dokka users.

HTML

Note: this section only applies to those customizing Dokka's HTML format by overriding styles or HTML templates. If you are not doing any customizations, you may skip this section.

To lay a solid foundation to making the HTML format responsive, some page layouts and many styles had to be changed in a backward-incompatible manner.

If you are overriding logo-styles.css to provide your own header logo, please update it to be in line with the new styles - there is significantly less position hardcoding now. See this example for how it can be done.

If you are overriding styles.css with your own file, please update the baseline styles to the latest, and see if anything is broken. If you get stuck with adapting your styles to the changes, the diff might help.

If you are overriding base.ftl or header.ftl templates, please update them to the latest, and adapt your changes.

CLI runner

Due to the analysis refactoring needed for the migration to K2 (#3099), the JARs required to run Dokka have slightly changed.

The following JARs are no longer supported or published:

• dokka-analysis.jar
• kotlin-analysis-intellij.jar
• kotlin-analysis-compiler.jar

Please, replace them with a single JAR:

• analysis-kotlin-descriptors-1.9.0.jar

Plugin API

An internal refactoring of Dokka's analysis API was much needed for the migration to K2, leading to breaking changes in some cases.

If your Dokka plugin compiles without any problems — you may ignore this information, you are likely not affected.

If something doesn't compile or doesn't work anymore, please see #3099 for more details.

1.8.20

Improvements

• Update Kotlin Gradle Plugin to 1.8.10 and Android Gradle Plugin to 4.1.3.
• Move the "Properties" block to be above functions inside the "Members" tab (#2908)
• Make Javadoc tag parsing case-sensitive as per Javadoc specification (#2907)
• Improve performance by reducing allocations and thus decreasing time spent in GC (#2729)

Bugfixes

• Fix unresolved links leading to declarations from another source set #2878
• Fix Dokka not failing the build if there are errors (#2934), regression from 1.8.10. Thanks to @jush!
• Fix TypeNotPresentException thrown in projects without KGP (#2890), regression from 1.8.10.

Gradle plugin

• Start using kotlin-dsl plugin (#2702, #2833). Thanks to @aSemy!
• Use Gradle filesystem types for task properties and apply default values lazily (#2707, #2983). Thanks to @aSemy!

Plugin API

• Change the default logging level of console apps (DokkaConsoleLogger) to PROGRESS (#2871)
• Introduce @InternalDokkaApi annotation (#2904)
• Mark various utility API as Dokka-internal (#2937)

Infrastructure

Big thanks to @aSemy, @Goooler and @3flex for their valuable contributions and for improving the internal
developer experience when working on Dokka!

• Use convention plugins to configure the subprojects (#2704 by @aSemy)
• Use Gradle Version Catalog and type-safe project dependencies (#2884 by @aSemy)
• Migrate buildSrc to a composite build (#2912 by @Goooler)
• Tidy up build configurations and project files (#2911, #2930, #2909, #2946, #2910, #2705 by @aSemy)
• Execute unit tests in parallel (#2953 by @Goooler)
• Add the ability to use different Java versions for build and test tasks (#2918 by @aSemy)
• Add reproducible archive build config (#2947 by @aSemy)
• Configure Kotlin compiler options lazily (#2883 by @Goooler)
• Improve GitHub Actions workflows (#2939, #2938 by @Goooler)
• Stop testing on Java 15 as it has reached EOL (#2892 by @3flex)
• Remove a workaround for a fixed Gradle issue (#2891 by @3flex)

Documentation

• Add informational badges to the main README.md (#2940). Thanks to @Goooler!
• Fix typos, inconsistencies and incorrect links in documentation (#2979, #2973, #2952). Thanks to @LiYing2010, @strangesource and @ansman!
• Add more information about the infrastructure to CONTRIBUTING.md (#2952)

Security

• Bump npm dependencies to address various vulnerabilities (#2894, #2923)

Other

• Update publication POM links to https (#2931). Thanks to @aSemy!
• Tidy up Gradle example projects and warning suppressions (#2916, #2975). Thanks to @aSemy!

1.8.10

Dokka's documentation has been entirely rewritten and can now be found on kotlinlang.org:

• More examples, including Groovy DSL for Gradle project configuration
• More guidelines to help beginners
• More details for complex projects

Note: Version 1.8.0 was skipped due to a Metaspace memory leak in Kotlin's reflection (KT-56093). Dokka 1.8.10 should be fully compatible with Kotlin 1.8.0.

Improvements

• Revise project documentation and examples (#2728, #2737, #2736). Thanks to @sarahhaggarty for helping!
• Support generating documentation for Kotlin/Wasm projects (#2814). Thanks to @igoriakovlev!
• Move the contents of Inheritors, Parameters, See also and Samples tabs into the main declaration description (#2688).
• Add Members and Members & Extensions tabs to class-like declaration pages (#2764).
• Display source set / platform indicators at all times, which should help identify the supported platform of single-platform libraries and modules. (#2847).
• Generate the default no-arg constructor for Java declarations (#2765).

Bugfixes

• Fixed analysis environment not being properly disposed (#2755).
• Fixed nondeterministic sorting of function/property overloads (#2784).
• Fixed inconsistent alphabetical order of element groups in index and navigation (#2861).
• Fixed constructors being rendered as functions (#2689).
• Fixed default values for var properties being displayed (#2717).
• Fixed source links leading to the KDoc instead of the declaration (#2724).
• Fixed thread-safety issues in DokkaLogger (#2827).
• Fixed documentation not being inherited in case of diamond inheritance (#2686).

Gradle Plugin

• Fixed NoSuchMethodError when running under Gradle 8 (#2796).
• Fixed possible metaspace leaks due to external thread locals not being disposed (#2678).
• Fixed premature initialization of outputDirectory input property (#556).
• Fixed premature initialization of moduleVersion input property (#2799). Thanks to @JavierSegoviaCordoba!
• Fixed unnecessary snapshotting of source link directory input which led to performance problems (#2807).
• Fixed missing group and description for MultiModule tasks (#2806). Thanks to @TWiStErRob!

Javadoc

• Fixed truncation of module and package description after the first sentence (#2055). Thanks to @BlackAnubis7!
• Fixed rendering of empty/useless Kotlin companion objects (#200, #2086)
• Fixed leaking configuration/environment details in generated links (#2803).
• Fixed incorrect links when javadoc.jar produced by Dokka is imported into IntelliJ IDEA / Android Studio (#2734). Thanks to @bomberaya!

Plugin API

• Mark Plugin API as experimental (#2716).

Infrastructure

• Enable Gradle build cache, and add caching of Maven dependencies for GitHub Actions (#2711, #2722). Thanks to @aSemy!
• Add concurrency cancellation for build/test GitHub Actions (#2710). Thanks to @aSemy!

Other

• Update jackson-databind to avoid CVE-2022-42003 (#2733). Thanks to @ryanlewis!
• Update Jsoup to avoid CVE-2022-36033 (#2772).
• Deprecate methods for adding/removing task dependencies in Dokka's Gradle plugin (#2857).
• Documentation improvements and fixes (#2719, #2718, #2744). Thanks to @SimonMarquis and @ansman!

1.7.20

This release focuses primarily on improving user experience and HTML format in particular.

Improvements

General

• Display inherited extensions (can be disabled by setting suppressInheritedMembers configuration property) (#2625)
• Display details for @Deprecated declarations such as deprecation message, level and proposed replacement (#2622)
• Display and document Enum's synthetic values() and valueOf() functions (#2650)
• Do not render constructors for annotation classes (#2642)
• Display values of Java constants (#2609)
• Trim spaces inside indented code blocks (#2661, #2232, #2233)
• Replace package name on the cover of package pages with "Package-level declarations" (#2586)

HTML format

• Add IntelliJ icons to the navigation side menu (#2578)
• Add auto-scrolling to selected navigation item (#2575)
• Use OS color scheme to initialize light/dark mode, thanks to @pt2121! (#2611)
• Update styling of all section tabs (including platform tabs) to match kotlinlang.org (#2589)
• Format long signatures dynamically based on client width (#2659)
• Add a horizontal divider between function overloads that are displayed on the same page (#2585)
• Add Cmd + K / Ctrl + K hotkey for opening search dialog, thanks to @atyrin! (#2633)
• Make current breadcrumb element not clickable and of default font color (#2588)
• Update code highlighting colors (#2670)
• Do not render platform tabs for common-only content (#2613)
• Apply the same style to all KDoc tag headers, making it more consistent (#2587)
• Move source links into signature, especially helpful on pages with many overloads (#2476)
• Add inner/nested declarations to the navigation side menu (#2597)
• Disable copy button for signatures (#2577)

Javadoc format

• Support var HTML tag, thanks to @atyrin (#2617)

Kotlin-as-Java plugin

• Render annotation blocks for transformed classes, previously ignored (#2549)

Gradle runner

• Remove kotlin-stdlib dependency, which should fix errors like Module was compiled with an incompatible version of Kotlin, thanks to @martinbonnin! (#2570)

Bugfixes

• Fixed missing spaces between adjacent Markdown elements, where _try_ *this* would be rendered as trythis (#2640)
• Fixed dependency resolution errors when building documentation for multiplatform projects with enabled compatibility metadata variant (#2634)
• Fixed a rare StackOverflowError related to type-aliased native references (#2664)
• Fixed IllegalStateException that was caused by using JS's dynamic types (#2645)
• Fixed a bug where certain private declarations were rendered as public (#2639)
• Fixed incorrect handling of static declarations used within @see tag (#2627)
• Fixed Java Enum types being rendered as Any (#2647)
• Fixed incorrect signature generation that was caused by generic types caching (#2619)
• Fixed incorrect parsing of static imports in Java annotation params (#2593)
• Fixed sourceRoots configuration param not handling single .java files, thanks to @2017398956! (#2604)
• Fixed unresponsive HTML anchor button (#2644)
• Fixed dokka-customFormat-example project to use up-to-date logo styles (#2608)

Developer experience

• Enable Gradle Enterprise build scans, thanks to @Goooler! (#2641)
• Use GitHub Actions artifacts to store generated documentation snapshots, thanks to @StefMa! (#2630)

Other

• Warn users that GFM, Javadoc and Jekyll formats are in early alpha stages by printing a build log message during execution (#2550)
• Revise developer guides documentation that should help plugin authors and new contributors (#2523)
• Bump Gradle to 7.5.1, thanks to @Goooler! (#2618)
• Fix spelling errors, thanks to @FelixDombek! (#2594)

1.7.10

Bugfix release that addresses several blockers and regressions.

General

• Support Kotlin 1.7.10

Gradle plugin

• Do not expose Kotlin stdlib in plugin dependencies, this should fix errors like Module was compiled with an incompatible version of Kotlin when using Dokka. Thanks to @martinbonnin (#2543)

Java sources

• Fixed build failure caused by having configured source links for Java code (#2544)
• Fixed several exotic problems that led to build failures, all related to using annotation in Java sources (#2509, #2551, #2350)
• Fixed IntelliJ platform WARN: Attempt to load key messages that appeared when analyzing Java sources (#2559)

1.7.0

Improvements

General

• Update to Kotlin 1.7.0, IntelliJ Platform 213
• Support definitely non-nullable types (#2520)
• Don't expose enum entry constructor arguments, thanks to @ebraminio (#2497)
• Preserve ordering of enum entries as in source code, previously reversed (#2469)
• Improve support for inherited Java fields with accessors, now properly interpreted as val/var properties (#2481, #2532, #2540)
• Skip @Deprecated members with HIDDEN level (#2486)
• Make rendered default value dependent on source set for expect/actual declarations (#2449)

HTML format

• Render quotes as blockquotes instead of code blocks, thanks to @TheOnlyTails (#2496)

Javadoc format

• Make Javadoc pages generation deterministic (#2479)
• Update shipped jQuery to avoid multiple CVEs, thanks to @ToppleTheNun (#1938)

GFM format

• Support rendering of code blocks and inline code used in KDocs, thanks to @cosinekitty (#2485)

Kotlin-as-Java plugin

• Include Java access modifiers into function signatures, thanks to @tripolkaandrey (#2510)

Gradle runner

• Make dokka-analysis dependency compileOnly, this should help avoid compatibility problems if different versions of Kotlin are bundled in Gradle and Dokka (#2521)
• Enable stricter validation for cacheable Gradle tasks, thanks to @3flex (#2500)
• Remove unused & redundant dependencies for Gradle runner, thanks to @3flex (#2502)
• Remove outdated suppression in Gradle runner, thanks to @3flex (#2501)

Fixes

General bugfixes

• Fixed a compiler deadlock issue which led to stalling builds in some KMP projects (#2480)
• Fixed incorrect argument names of functional type parameters (#2478)
• Fixed missing external docs for AndroidX libraries, thanks to @EdricChan03 (#2456)
• Fixed tests failing on Windows, thanks to @3flex (#2507)

Security

• Get rid of bundled log4j 1.2 that came as a transitive dependency (#2488)
• Update Jackson to avoid CVE-2020-36518, thanks to @1mt (#2525)

Plugin API

• Decompose base.ftl template: now header.ftl, footer.ftl and page_metadata.ftl can be overridden individually (#2432)

Other

• Add Kotlin stability & support badges, thanks to @etolstoy (#2511)
• Remove an unused runner parameter, thanks to @3flex (#2498)
• Correct typos, thanks to @PaladiRka (#2504) and @mahozad (#2506)!

Thanks to all the contributors!