options.forkOptions.executable problem in Gradle 8.0

Help/Discuss
1

Hello,

We are migrating from Gradle 7.5 to 8.0.
We have a build.gradle file with this snippet of configuration to execute the Java tests:

...
...
tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
    options.fork = true
    options.forkOptions.executable =  System.getenv('JAVA_HOME') + '/bin/javac'
}
    
tasks.withType(Test) {
   systemProperty "file.encoding", "UTF-8"
   executable = System.getenv('JAVA_HOME') + '/bin/java'
}
...
...

In 7.5 version it works ok but when we run it on a Windows environment with Gradle 8.0 we obtain this error:

> Task :Application_Name-test:compileTestJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':Application_Name-test:compileTestJava'.
> Error while evaluating property 'javaCompiler' of task ':Application_Name-test:compileTestJava'.
   > Failed to calculate the value of task ':Application_Name-test:compileTestJava' property 'javaCompiler'.
      > The configured executable does not exist (C:\Program Files\OpenJDK\openjdk-17.0.5.8\jdk-17.0.5+8\bin\javac)

If we add the executable extension to the file name everything works on Windows:

...
...
tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
    options.fork = true
    options.forkOptions.executable =  System.getenv('JAVA_HOME') + '/bin/javac.exe'
}
    
tasks.withType(Test) {
   systemProperty "file.encoding", "UTF-8"
   executable = System.getenv('JAVA_HOME') + '/bin/java.exe'
}
...
...

The problem is that it must work also in Linux environments.

Any idea about why it work on 7.5 but not in 8.0, and how to solve it?

2

Besides that I would recommend you use the JVM toolchains feature instead of this manual executable setting, I don’t know why it worked in 7.5 actually if you configured a non-existing file. But could well be, that there were some changes.

If you really want to keep that logic, you can do something like

import org.apache.tools.ant.taskdefs.condition.Os

and then

"/bin/java${Os.isFamily(Os.FAMILY_WINDOWS) ? '.exe' : ''}"