Kotlin Multiplatform bindings to 34 Tree-sitter grammars, built on the published KTreeSitter core (io.github.tree-sitter:ktreesitter). Grammar bindings are generated by an in-house Gradle plugin ported from the upstream kotlin-tree-sitter plugin.

Each grammar repository is pinned as a git submodule (SSH URL) under languages/<name>/tree-sitter-<name> by its release tag. tsx and typescript share the tree-sitter-typescript repository; ocaml builds the grammars/ocaml grammar.

Every language module targets:

• JVM — native grammar compiled to a JNI shared library (CMake), loaded from jar resources
• Android — native grammar compiled with the NDK toolchain (arm64-v8a, armeabi-v7a, x86_64)
• Kotlin/Native — linuxX64, linuxArm64, mingwX64, macosX64, macosArm64, iosArm64, iosSimulatorArm64

• gradle/libs.versions.toml — version catalog (Kotlin 2.3.20, AGP 9.3.1, KTreeSitter; build-logic dependencies are declared here too)
• build-logic/ — in-house tree-sitter-grammar plugin (grammar file generation, JNI/CMake scaffolding, cinterop wiring) plus the tree-sitter-language convention plugin driving every languages/* module

Languages are published to Maven Central with com.vanniktech.maven.publish 0.37.0. Each language publishes a JVM jar plus one JNI artifact per platform (sdl-kmp layout):

./gradlew :languages:java:publishToMavenLocal                # java jvm jar + jni artifacts to Maven Local
./gradlew :jni:java-darwin-aarch64:publishToMavenLocal       # single platform jni artifact

Coordinates: cn.enaium.treesitter:treesitter-languages-<lang>-kmp-jvm:<version> for the pure-Java JVM jar and cn.enaium.treesitter:treesitter-languages-<lang>-kmp-jni-<platform>:<version> for the per-platform JNI jars (darwin-aarch64, darwin-x86_64, linux-x86_64, linux-aarch64, windows-x86_64), each embedding the native grammar library at lib/<os>/<arch>/libktreesitter-<lang>.<ext>.

Each language module is versioned by its grammar repository tag plus a .1 release suffix (e.g. tree-sitter-java v0.23.5 -> treesitter-languages-java-kmp-jvm:0.23.5.2, tree-sitter-xml v0.7.0 -> treesitter-languages-xml-kmp-jvm:0.7.0.2), read from the pinned submodule tag at build time (smali is pinned to 1.0.0.2 because its repo tags releases as stable).

The jvm POM lists all five JNI artifacts as runtime dependencies; the generated binding's libPath() picks the native library matching the consumer's OS/arch from whichever JNI jar the dependency resolution selected.

CI (.github/workflows/test.yml) builds each platform's JNI libraries, publishes the java/xml jvm jars and the platform's JNI jars to Maven Local, and verifies the native library is embedded. .github/workflows/publish.yml publishes java/xml to Maven Central (manual trigger).

// build.gradle.kts
repositories { mavenLocal(); mavenCentral() }

dependencies {
    implementation("io.github.tree-sitter:ktreesitter:0.25.1")
    implementation("cn.enaium.treesitter:treesitter-languages-java-kmp-jvm:0.25.1")
}

import io.github.treesitter.ktreesitter.Language
import io.github.treesitter.ktreesitter.Parser
import cn.enaium.treesitter.languages.java.TreeSitterJava

val language = Language(TreeSitterJava.language())
val parser = Parser(language)
val tree = parser.parse("class A { int x; }")
println(tree.rootNode.type) // program

./gradlew :languages:java:jvmTest             # JVM (builds JNI lib via CMake)
./gradlew :languages:java:macosArm64Test      # Kotlin/Native (cinterop)
./gradlew :languages:java:compileAndroidMain  # Android
./gradlew :example:run                        # Compose desktop playground

Requires JDK 17+ (JDK 21 recommended), the Android SDK with NDK (see gradle.properties), and CMake for JNI builds. Gradle 9.7 / AGP 9.3.1 / Kotlin 2.3.20.

• The tree-sitter-grammar plugin in build-logic/ is a port of the upstream io.github.tree-sitter.ktreesitter-plugin; the published Gradle plugin is not used.
• AGP 9's com.android.kotlin.multiplatform.library plugin has no externalNativeBuild DSL, so the Android JNI library is compiled directly with the NDK toolchain into src/androidMain/jniLibs (arm64-v8a, armeabi-v7a, x86_64).
• The published KTreeSitter 0.25.1 native binding passes the Kotlin string's character count as the byte length to ts_parser_parse_string_encoding; non-ASCII sources can be truncated on Kotlin/Native targets. Samples are ASCII to avoid tripping this upstream issue (the JVM binding uses the correct UTF length).

example/ is a Compose Multiplatform port of the tree-sitter playground:

• language dropdown (all 34 grammars)
• query input with options (highlight matches / show only matches / case sensitive)
• source editor with query-match highlighting and node-selection highlighting
• collapsible syntax tree panel showing every parsed node with byte ranges and text

Targets: desktop (JVM), Android, iOS, macOS. Run with ./gradlew :example:run (desktop).

Note: Compose Multiplatform 1.12 publishes artifacts only for macosArm64 (native desktop), not linuxX64/mingwX64, so the example targets macosArm64/iOS plus Android/JVM.