Help needed with packaging veraPDF

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1

Hey there! I am in the process of packaging veraPDF, a CLI/GUI PDF/A validation program that uses Maven for building. The project doesn’t provide pre-built binaries but rather an installer. I managed to package veraPDF for Nixpkgs using the installer, but this is a less-than-ideal solution as it requires creating an XML file that represents the selections in the graphical installer and running the installer in a FHSUserEnv :

  installPhase = let
      auto-install = writeTextFile {
        name = "auto-install.xml";
        text = let
          gui = lib.boolToString enableGUI;
          doc = lib.boolToString enableDocumentation;
          scripts = lib.boolToString enableMacAndNixScripts;
          models = lib.boolToString enableCorpusAndValidationModel;
          plugin = lib.boolToString enableSamplePlugin;
        in ''
          <?xml version="1.0" encoding="UTF-8" standalone="no"?>
          <AutomatedInstallation langpack="eng">
          <com.izforge.izpack.panels.htmlhello.HTMLHelloPanel id="welcome"/>
          <com.izforge.izpack.panels.target.TargetPanel id="install_dir">
          <installpath>@out@/bin</installpath>
          </com.izforge.izpack.panels.target.TargetPanel>
          <com.izforge.izpack.panels.packs.PacksPanel id="sdk_pack_select">
          <pack index="0" name="veraPDF GUI" selected="${gui}"/>
          <pack index="1" name="veraPDF Mac and *nix Scripts" selected="${scripts}"/>
          <pack index="2" name="veraPDF Corpus and Validation model" selected="${models}"/>
          <pack index="3" name="veraPDF Documentation" selected="${doc}"/>
          <pack index="4" name="veraPDF Sample Plugins" selected="${plugin}"/>
          </com.izforge.izpack.panels.packs.PacksPanel>
          <com.izforge.izpack.panels.install.InstallPanel id="install"/>
          <com.izforge.izpack.panels.finish.FinishPanel id="finish"/>
          </AutomatedInstallation>
        '';
      };

      # the installer expects chmod to be found in /bin/chmod
      installEnv = buildFHSUserEnv {
        name = "installer-env";
        runScript = "java -jar verapdf-izpack-installer-${version}.jar";
      };
    in ''
      runHook preInstall

      mkdir $out
      substituteAll ${auto-install} auto-install.xml
      ${installEnv}/bin/${installEnv.name} auto-install.xml
      rm -r $out/bin/{.installationinformation,Uninstaller}
      for i in $out/bin/verapdf{,-gui}; do
        wrapProgram $i --set JAVA_HOME ${jre}
      done

      runHook postInstall
    '';

Although this method does produce a working program, I believe it is not suitable for inclusion in nixpkgs.

I have also tried several other methods to package this maven application, including (all using the latest release v1.22.3):

  1. Using mvn2nix, but it failed with the fallowing error when running nix run github:fzakaria/mvn2nix#mvn2nix > mvn2nix-lock.json:
java.lang.RuntimeException: Could not find artifact org.verapdf.pdfbox:xmpbox:jar:2.0.70 in any repository
  1. Using mvn2nix-maven-plugin, which successfully produced a project-info.json but the build still failed:
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.405 s
[INFO] Finished at: 2023-02-13T14:04:50Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project gui: Could not resolve dependencies for project org.verapdf.apps:gui:jar:1.22.0: Failed to collect dependencies at or>
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :gui
  1. The double invocation method, which also produced a repository for offline usage, but it failed during the build too:
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for org.verapdf:verapdf-apps:1.22.0: Cannot access vera-dev (https://artifactory.openpreservation.org/artifactory/vera-dev) i>
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project org.verapdf:verapdf-apps:1.22.0 (/build/source/pom.xml) has 1 error
[ERROR]     Non-resolvable parent POM for org.verapdf:verapdf-apps:1.22.0: Cannot access vera-dev (https://artifactory.openpreservation.org/artifactory/vera-de>
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

Executing the build locally without using Nix works perfectly fine. Simply running mvn clean install -DskipTests successfully produces a jar file. However, the tests seem to fail for some reason and throw an error, specifically: [ERROR] VeraAppConfigTest.testHashCodeAndEquals:72 EqualsVerifier found a problem in class org.verapdf.apps.VeraAppConfigImpl. -> Unsupported class file major version 63

In conclusion, I am still searching for the most efficient and effective method to package veraPDF. I’d be grateful for any tips or suggestions on how to get it done.