Need selfcontained:

  Maven, JDK (with JAVA_HOME set), NodeJS

TLDR:

  tar xvzf MISSING-POM-JARS.tar.gz  
  /bin/cp -r MISSING-POM-JARS/* ~.m2/repo/.

  ./COMPILE.sh

====

Note 1:

Maven downloads and stores a lot of jar and related maven repository files in:

  /home/$USER/.m2


If compiling on a computer where the disk area for /home is small, consider:

  
  export HOME=/tmp/$USER
  
Or some other (ideally local) disk with plenty of disk space

  tar xvzf MISSING-POM-JARS.tar.gz  
  /bin/cp -r MISSING-POM-JARS/* $HOME/.m2/repo/.

  cd webswing-20.2.5
  
Maven still needs help with a relocated .m2 directory:

  mvn -Pbuild,release -Dmaven.repo.local=$HOME/.m2/repo clean

  mvn -Pbuild,release -Dmaven.repo.local=$HOME/.m2/repo install

====
Note 2:

There are some Errors reported when compiling related to generating Javadoc

  [INFO] 
  [INFO] --- maven-javadoc-plugin:3.0.1:jar (attach-javadocs) @ modpatch-jdk-jsobject ---
  [ERROR] Error fetching link: /Expanse/research/code-unmanaged/webswing-complete/webswing-encore/webswing/webswing-app-toolkit/target/apidocs/package-list. Ignored it.
  [INFO] 

These seem to be benign.