Replacing javascript nashorn:mozilla_compat.js use in ant script

Question

Oracle has depreciated nashorn and I use it in my apache ant build scripts.

Here is a short example;

try{load("nashorn:mozilla_compat.js");}catch(e){;}
    importClass(java.io.File);
    var sourceName = project.getProperty("build.source.dir") + "/" +project.getProperty("teiFile") + ".xml";
    var targetName = project.getProperty("build.search.dir") + "/" + project.getProperty("teiFile") + ".xml";
    var sourceFile = new File("", sourceName);
    var targetFile = new File("", targetName);
    var uptodate = targetFile.exists() && sourceFile.lastModified() < targetFile.lastModified();
      var sourcePrefix = project.getProperty("teiFile");
      if(!uptodate & !sourcePrefix.startsWith("G")) {
         ......
       }
}

I've heard mentions of Rhino or graalVM as a replacement, but each seems to have a fairly long list of deficiencies.Suggestions for a library that is currently active and stable.

thanks, scott

While I don’t know what your ...... line represents, I suspect the parts you’ve shown can be done with regular Ant tasks. — VGR
– VGR, Commented Mar 3, 2020 at 1:32

Oleg Šelajev · Accepted Answer · 2020-03-03 21:08:05Z

1

GraalVM is currently active, stable, has a Nashorn compatibility mode. You can run your ant scripts with GraalVM, and the JS engine is included by default. Or you can include GraalVM's JavaScript as a few dependencies and run on OpenJDK, which will be slower, and might be an untested combination of OpenJDK and GraalVM's JavaScript, but can also work.

answered Mar 3, 2020 at 21:08

Oleg Šelajev

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1 Comment

Christian Wirth Over a year ago

Specifically, you should probably set that to your ANT_OPTS before calling ant: ANT_OPTS="-Dpolyglot.js.nashorn-compat=true" ant See our FAQ

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