Update JLine to 4.x (#1511)

- Remove dependency org.fusesource.jansi:jansi
- In 4.x, org.fusesource.jansi:jansi was replaced with org.jline:jansi.
Instead of adding this new dependency, this commit replaces Pkl’s single
Jansi usage with custom code that preserves existing behavior. Fixing
existing ANSI quirks is left for a future PR.
- Replace jline-terminal-ansi with jline-terminal-jni
  - In 4.x, only -jni and -ffm are available (-ffm requires Java 22+)
- Configure native-image build for jline-terminal-jni

As updating JLine is delicate, I manually tested `pkl repl` and `jpkl
repl` on Windows 11 (using Windows Terminal) and on Ubuntu, and found no
issues. However, I do not have access to a macOS machine.

buildSrc/src/main/kotlin/NativeImageBuild.kt

@@ -119,6 +119,8 @@ abstract class NativeImageBuild : DefaultTask() {
         add("--initialize-at-build-time=")
         // needed for messagepack-java (see https://github.com/msgpack/msgpack-java/issues/600)
         add("--initialize-at-run-time=org.msgpack.core.buffer.DirectBufferAccess")
+        // needed for jline-terminal-jni
+        add("--initialize-at-run-time=org.jline.nativ,org.jline.terminal.impl.jni")
         add("--no-fallback")
         add("-H:IncludeResources=org/pkl/core/stdlib/.*\\.pkl")
         add("-H:IncludeResources=org/jline/utils/.*")

gradle/libs.versions.toml

@@ -26,11 +26,8 @@ graalVmSha256-windows-x64 = "fde83c5ceec2c75560c747ccd9f314f90e4cf5c5287416e67c4
 ideaExtPlugin = "1.4.1"
 javaPoet = "0.+"
 javaxInject = "1"
-jansi = "2.+"
 jimfs = "1.+"
-# later versions don't work with native image
+jline = "4.+"
-# (at least not without additional configuration; tested with 3.25.1 and 3.27.1)
-jline = "3.23.0"
 jmh = "1.+"
 jmhPlugin = "0.7.3"
 jsr305 = "3.+"
@@ -73,11 +70,10 @@ graalSdk = { group = "org.graalvm.sdk", name = "graal-sdk", version.ref = "graal
 graalJs = { group = "org.graalvm.js", name = "js", version.ref = "graalVm" }
 javaPoet = { group = "com.palantir.javapoet", name = "javapoet", version.ref = "javaPoet" }
 javaxInject = { group = "javax.inject", name = "javax.inject", version.ref = "javaxInject" }
-jansi = { group = "org.fusesource.jansi", name = "jansi", version.ref = "jansi" }
 jimfs = { group = "com.google.jimfs", name = "jimfs", version.ref = "jimfs" }
 jlineReader = { group = "org.jline", name = "jline-reader", version.ref = "jline" }
 jlineTerminal = { group = "org.jline", name = "jline-terminal", version.ref = "jline" }
-jlineTerminalJansi = { group = "org.jline", name = "jline-terminal-jansi", version.ref = "jline" }
+jlineTerminalJni = { group = "org.jline", name = "jline-terminal-jni", version.ref = "jline" }
 jsr305 = { group = "com.google.code.findbugs", name = "jsr305", version.ref = "jsr305" }
 junitApi = { group = "org.junit.jupiter", name = "junit-jupiter-api", version.ref = "junit" }
 junitEngine = { group = "org.junit.jupiter", name = "junit-jupiter-engine", version.ref = "junit" }

pkl-cli/gradle.lockfile

@@ -80,7 +80,6 @@ org.eclipse.jetty:jetty-servlets:11.0.26=testCompileClasspath,testImplementation
 org.eclipse.jetty:jetty-util:11.0.26=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.eclipse.jetty:jetty-webapp:11.0.26=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.eclipse.jetty:jetty-xml:11.0.26=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
-org.fusesource.jansi:jansi:2.4.3=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.graalvm.polyglot:polyglot:25.0.1=compileClasspath,compileOnlyDependenciesMetadata,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.graalvm.sdk:collections:25.0.1=compileClasspath,compileOnlyDependenciesMetadata,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.graalvm.sdk:graal-sdk:25.0.1=compileClasspath,compileOnlyDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testRuntimeClasspath
@@ -120,10 +119,10 @@ org.jetbrains.kotlinx:kotlinx-serialization-core:1.7.3=swiftExportClasspathResol
 org.jetbrains:annotations:13.0=compileClasspath,kotlinBuildToolsApiClasspath,kotlinCompilerClasspath,kotlinCompilerPluginClasspathMain,kotlinCompilerPluginClasspathTest,kotlinInternalAbiValidation,kotlinKlibCommonizerClasspath,nativeImageClasspath,runtimeClasspath,swiftExportClasspathResolvable,testCompileClasspath,testRuntimeClasspath
 org.jetbrains:markdown-jvm:0.7.3=nativeImageClasspath,runtimeClasspath,testRuntimeClasspath
 org.jetbrains:markdown:0.7.3=nativeImageClasspath,runtimeClasspath,testRuntimeClasspath
-org.jline:jline-native:3.23.0=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
+org.jline:jline-native:4.0.11=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
-org.jline:jline-reader:3.23.0=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
+org.jline:jline-reader:4.0.11=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
-org.jline:jline-terminal-jansi:3.23.0=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
+org.jline:jline-terminal-jni:4.0.11=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
-org.jline:jline-terminal:3.23.0=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
+org.jline:jline-terminal:4.0.11=compileClasspath,implementationDependenciesMetadata,nativeImageClasspath,runtimeClasspath,testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.jspecify:jspecify:1.0.0=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.junit.jupiter:junit-jupiter-api:6.0.3=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath
 org.junit.jupiter:junit-jupiter-engine:6.0.3=testCompileClasspath,testImplementationDependenciesMetadata,testRuntimeClasspath

pkl-cli/pkl-cli.gradle.kts

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2024-2025 Apple Inc. and the Pkl project authors. All rights reserved.
+ * Copyright © 2024-2026 Apple Inc. and the Pkl project authors. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,10 +56,9 @@ dependencies {
   api(projects.pklCommonsCli)
 
   implementation(projects.pklCommons)
-  implementation(libs.jansi)
   implementation(libs.jlineReader)
   implementation(libs.jlineTerminal)
-  implementation(libs.jlineTerminalJansi)
+  implementation(libs.jlineTerminalJni)
   implementation(projects.pklServer)
   implementation(projects.pklFormatter)
   implementation(libs.clikt)

pkl-cli/src/main/kotlin/org/pkl/cli/repl/Repl.kt

@@ -20,7 +20,6 @@ import java.net.URI
 import java.nio.file.Path
 import java.util.regex.Pattern
 import kotlin.io.path.deleteIfExists
-import org.fusesource.jansi.Ansi
 import org.jline.reader.EndOfFileException
 import org.jline.reader.Highlighter
 import org.jline.reader.LineReader
@@ -52,7 +51,7 @@ class PklHighlighter : Highlighter {
 }
 
 internal class Repl(workingDir: Path, private val server: ReplServer, private val color: Boolean) {
-  private val terminal = TerminalBuilder.builder().apply { jansi(true) }.build()
+  private val terminal = TerminalBuilder.builder().apply { jni(true) }.build()
   private val history = DefaultHistory()
   private val reader =
     LineReaderBuilder.builder()
@@ -249,14 +248,20 @@ internal class Repl(workingDir: Path, private val server: ReplServer, private va
   }
 
   private fun highlight(str: String): String {
-    val ansi = Ansi.ansi()
+    // Inserting ANSI codes into a string that may already contain ANSI codes is problematic.
-    var normal = true
+    // This code preserves existing behavior but should eventually be removed.
+    val builder = StringBuilder()
+    var bold = false
     for (part in str.split("`", "```")) {
-      ansi.a(part)
+      if (bold) {
-      normal = !normal
+        builder.append("\u001B[1m")
-      if (!normal) ansi.bold() else ansi.boldOff()
+        builder.append(part)
+        builder.append("\u001B[22m")
+      } else {
+        builder.append(part)
+      }
+      bold = !bold
     }
-    ansi.reset()
+    return builder.toString()
-    return ansi.toString()
   }
 }

pkl-tools/gradle.lockfile

@@ -27,7 +27,6 @@ io.leangen.geantyref:geantyref:1.3.16=runtimeClasspath,testRuntimeClasspath
 net.java.dev.jna:jna:5.14.0=runtimeClasspath,testRuntimeClasspath
 org.commonmark:commonmark-ext-gfm-tables:0.28.0=runtimeClasspath,testRuntimeClasspath
 org.commonmark:commonmark:0.28.0=runtimeClasspath,testRuntimeClasspath
-org.fusesource.jansi:jansi:2.4.3=runtimeClasspath,testRuntimeClasspath
 org.graalvm.polyglot:polyglot:25.0.1=runtimeClasspath,testRuntimeClasspath
 org.graalvm.sdk:collections:25.0.1=runtimeClasspath,testRuntimeClasspath
 org.graalvm.sdk:graal-sdk:25.0.1=runtimeClasspath,testRuntimeClasspath
@@ -54,10 +53,10 @@ org.jetbrains:annotations:13.0=compileClasspath,testCompileClasspath
 org.jetbrains:annotations:23.0.0=runtimeClasspath,testRuntimeClasspath
 org.jetbrains:markdown-jvm:0.7.3=runtimeClasspath,testRuntimeClasspath
 org.jetbrains:markdown:0.7.3=runtimeClasspath,testRuntimeClasspath
-org.jline:jline-native:3.23.0=runtimeClasspath,testRuntimeClasspath
+org.jline:jline-native:4.0.11=runtimeClasspath,testRuntimeClasspath
-org.jline:jline-reader:3.23.0=runtimeClasspath,testRuntimeClasspath
+org.jline:jline-reader:4.0.11=runtimeClasspath,testRuntimeClasspath
-org.jline:jline-terminal-jansi:3.23.0=runtimeClasspath,testRuntimeClasspath
+org.jline:jline-terminal-jni:4.0.11=runtimeClasspath,testRuntimeClasspath
-org.jline:jline-terminal:3.23.0=runtimeClasspath,testRuntimeClasspath
+org.jline:jline-terminal:4.0.11=runtimeClasspath,testRuntimeClasspath
 org.msgpack:msgpack-core:0.9.11=runtimeClasspath,testRuntimeClasspath
 org.organicdesign:Paguro:3.10.3=runtimeClasspath,testRuntimeClasspath
 org.snakeyaml:snakeyaml-engine:2.10=runtimeClasspath,testRuntimeClasspath