Where can I read more about this removal? Thor still support Ruby < 2.3 so we need to test on them in some way

@rafaelfranca, the log I attached above is the output of gem update --system.

Rubygems v3.0+ require Ruby >= 2.3. Here is a link to the issue on their Github.

Ruby 2.3 was released in 2015.

Right. An easier fix is to change the gem update --system call on travis to define a version that is not rubygems 3.0 for rubies < 2.3.

@rafaelfranca that's an idea. I looked at this link but could not find an easy way to do it. Do you know how? Do you mind creating a PR for that? How do we know the Ruby versions that need to be supported by Thor?

As far as I understand each ruby installation includes a version of rubygems. Even the latest Ruby v2.6.0 isn't released with rubygems v3.0. Therefore this is an issue for future releases of Ruby. Therefore I would be inclined to remove gem update --system from the travis config file all together. I would also constraint gem install bundler to version < 2.0.0 due to imcompatibility with rubies < 2.3.0.

Maybe we can actually drop support instead. Thor's main dependants, Rails and Bundler, have already moved on, so maybe it's time?

@deivid-rodriguez That sounds like a drastic step. I do use thor in my project called tty and I'm keen for this library to support Ruby >= 2.0.0. I belive there is value in maintaining older versions of Ruby and progressively eliminating more defunct ones. For example, dropping 1.8.7 support could be a good first step?

My take to this is to follow the upstream policy, so when ruby-core drops support for a version of ruby, I drop support too. But this is up to the maintainers to decide :)

I'm up to remove support of older version on thor 1.0 but right now I'd prefer a green build in all the versions we support today.

So that means that the next version will not yet be 1.0, or at least that you haven't yet decided it... Right?

What about for dropping support for rubies under 2.0, @rafaelfranca? Would you be willing to merge that now if I open a PR?