polymer-modulizer | Moved to https : | Generator Utils library

I had the same problem running the migration tool on Windows 10.

As a workaround, I used Docker to run it :

• install Docker

• run a Maven image, I use Maven 3 and openjdk 11 (mount your maven repo to prevent re-downloading all dependencies) :

  docker run -it --rm -v c:/[path to your maven repo]:/root/.m2/repository -v c:/[path to your maven project]:/usr/src/myproject -w /usr/src/myproject --entrypoint "/bin/sh" maven:3-jdk-11

• then, in the container, install node and npm :

  curl -sL https://deb.nodesource.com/setup_12.x | bash -

  apt-get install -y nodejs

• install bower :

  npm install -g bower

• allow running bower with root

  echo '{ "allow_root": true }' > /root/.bowerrc

• run the migration tool

  mvn vaadin:migrate-to-p3