Remove ExperimentalPathApi opt-in from build files

[Copilot]

kotlin.io.path.ExperimentalPathApi graduated to stable in recent Kotlin versions. The -opt-in compiler flag is no longer needed.

• Removed freeCompilerArgs.add("-opt-in=kotlin.io.path.ExperimentalPathApi") from base/build.gradle.kts, kotest/build.gradle.kts, and spek/build.gradle.kts
• explicitApi() is intentionally preserved — it is the mode configuration, not an opt-in

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• docs.oracle.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -XX:MaxMetaspaceSize=384m -XX:+HeapDumpOnOutOfMemoryError -Xms256m -Xmx512m -Dfile.encoding=UTF-8 (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -XX:+HeapDumpOnOutOfMemoryError -XX:+AlwaysPreTouch @/home/REDACTED/.gradle/.tmp/gradle-worker-classpath6988300048491920042txt -Xmx2g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant worker.org.gradle.process.internal.worker.GradleWorkerMain 'Gradle Worker Daemon 1' (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -XX:+HeapDumpOnOutOfMemoryError -XX:+AlwaysPreTouch @/home/REDACTED/.gradle/.tmp/gradle-worker-classpath488314664958885122txt -Xmx2g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant worker.org.gradle.process.internal.worker.GradleWorkerMain 'Gradle Worker Daemon 2' (dns block)
• kotlinlang.org
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -XX:MaxMetaspaceSize=384m -XX:+HeapDumpOnOutOfMemoryError -Xms256m -Xmx512m -Dfile.encoding=UTF-8 (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -XX:+HeapDumpOnOutOfMemoryError -XX:+AlwaysPreTouch @/home/REDACTED/.gradle/.tmp/gradle-worker-classpath6988300048491920042txt -Xmx2g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant worker.org.gradle.process.internal.worker.GradleWorkerMain 'Gradle Worker Daemon 1' (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -XX:+HeapDumpOnOutOfMemoryError -XX:+AlwaysPreTouch @/home/REDACTED/.gradle/.tmp/gradle-worker-classpath488314664958885122txt -Xmx2g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant worker.org.gradle.process.internal.worker.GradleWorkerMain 'Gradle Worker Daemon 2' (dns block)

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Original prompt

Pull request: #192

the CI is failing in this PR because of an error in gradle. please develop a well-founded theory of what is causing the error. explain step by step how the error is caused. discard the theory if the chain of reasons is not logically sound. if a theory is discarded, try again using the same methodology.

use the internet to research the issue. run command to analyse the error if necessary.

generate a summary of your theory and reasoning.

if you have a sound theory, develop a plan to fix the issue and open a pr that implements the fix

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[Copilot]

Pull request overview

Removes the -opt-in=kotlin.io.path.ExperimentalPathApi compiler flag now that the Kotlin Path API is stable, while also modernizing parts of the Gradle/Kotlin build configuration.

Changes:

• Remove ExperimentalPathApi opt-in flags from module build scripts.
• Switch Kotlin compilation configuration to kotlin { compilerOptions { ... } } with JvmTarget.JVM_17 and simplify kotlin("reflect") dependency declaration.
• Additional build/runtime adjustments (e.g., adding junit-platform-launcher, updating nexus publish plugin, minor Kotlin stdlib API update in production code).

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
base/build.gradle.kts	Drops opt-in flag, moves to compilerOptions, adds JUnit Platform launcher runtime dep, and updates test working dir setup.
kotest/build.gradle.kts	Drops opt-in flag, moves to compilerOptions, adds JUnit Platform launcher runtime dep.
spek/build.gradle.kts	Drops opt-in flag, moves to compilerOptions, adds JUnit Platform launcher runtime dep.
build.gradle.kts	Updates nexus publish plugin version and adjusts release task dependency to plural staging close/release task.
base/src/main/kotlin/DefaultTestFiles.kt	Replaces deprecated toLowerCase() with lowercase().

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