fawind/gradle-build-env-repro

Combining jvm args added through the gradle.properties file and the GRADLE_OPTS environment variable results in the jvm args declared in gradle.properties getting ignored.

From the Gradle docs:

When configuring Gradle behavior you can use these methods, listed in order of highest to lowest precedence (first one wins):

• Command-line flags such as --build-cache. These have precedence over properties and environment variables.
• System properties such as systemProp.http.proxyHost=somehost.org stored in a gradle.properties file.
• Gradle properties such as org.gradle.caching=true that are typically stored in a gradle.properties file in a project root directory or GRADLE_USER_HOME environment variable.
• Environment variables such as GRADLE_OPTS sourced by the environment that executes Gradle.

Based on that, I would expect that my jvm args added in gradle.properties still apply when also using GRADLE_OPTS. However, it looks like that jvm args added in gradle.properties get dropped when also supplying args through GADLE_OPTS.

To Reproduce

Running both scripts using Java 17:

1. Just running the printArgs task picks up the jvmArgs added in gradle.properties:

   ./gradlew printArgs          
   > Task :printArgs
   Args: [
     --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED,
     --add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED,
     --add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED,
     --add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED,
     --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED,
     --add-opens=java.base/java.util=ALL-UNNAMED,
     --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-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.atomic=ALL-UNNAMED,
     -Dfile.encoding=UTF-8, -Duser.country=US, -Duser.language=en, -Duser.variant
   ]

2. When also adding jvmArgs through GRADLE_OPTS however, the jvmArgs added in gradle.properties are not getting picked up:

   GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx1g'" ./gradlew printArgs
   > Task :printArgs
   Args: [
     --add-opens=java.base/java.util=ALL-UNNAMED,
     --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-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.atomic=ALL-UNNAMED,
     -Xmx1g,
     -Dfile.encoding=UTF-8, -Duser.country=US, -Duser.language=en, -Duser.variant]