Capturing env var during build time no longer works.

[borkdude]

Repro:

public class Env {
    public static String FOO = System.getenv("FOO");
    public static void main(String [] args) {
        System.out.println("FOO at build time: " + FOO);
    }
}

Compile with CE 22.3.1 and run FOO=1 $GRAALVM_HOME/bin/native-image --initialize-at-build-time=Env Env
Running the binary ./env produces:

$ ./env
FOO at build time: 1

However with Oracle GraalVM 21:

$ ./env
FOO at build time: null

[zakkak]

Hi @borkdude, starting with GraalVM 23.0.0 you need to explicitly define which env variables should get embedded in the native image using the -E option.

The following will do the trick in your example:

$ FOO=1 native-image --initialize-at-build-time=Env Env -EFOO
...
$ ./env
FOO at build time: 1

[borkdude]

@zakkak Thanks!