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2025-10-09 14:15:47 +02:00
{
jdk,
jre,
pkgs,
}:
# 'Hello world' Java application derivation for use in tests
let
source = pkgs.writeTextDir "src/Hello.java" ''
class Hello {
public static void main(String[] args) {
System.out.println("Hello, world!");
}
}
'';
in
pkgs.stdenv.mkDerivation {
pname = "hello";
version = "1.0.0";
src = source;
buildPhase = ''
runHook preBuild
${jdk}/bin/javac src/Hello.java
runHook postBuild
'';
installPhase = ''
runHook preInstall
mkdir -p $out/lib
cp src/Hello.class $out/lib
mkdir -p $out/bin
cat >$out/bin/hello <<EOF;
#!/usr/bin/env sh
${jre}/bin/java -cp $out/lib Hello
EOF
chmod a+x $out/bin/hello
runHook postInstall
'';
}