Ruby Gem v3.20.0 on arm64 requires >= Ruby 3.1

[deecewan]

What version of protobuf and what language are you using?
Version: 3.20.0
Language: Ruby

What operating system (Linux, Windows, ...) and version?
macOS M1 - ARM64

What runtime / compiler are you using (e.g., python version or gcc version)
Ruby 2.7

What did you do?

• Be on a arm64-darwin platform
• Use ruby 2.7 (anything less than 3.1)
• Add `gem 'google-protobuf', '3.20.0' to a gemfile
• Run bundle install

What did you expect to see
Successful install

What did you see instead?

google-protobuf-3.20.0-arm64-darwin requires ruby version < 3.2.dev, >= 3.1, which is incompatible with the current version, ruby 2.7.2p137

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

I've had a look at the gemspec and the Rakefile and I can't see a reason that the amd64 version requires ruby 3.1. All the other versions of the gem require only ruby 2.5/

For reference, the rubygems entry for arm64-darwin: https://rubygems.org/gems/google-protobuf/versions/3.20.0-arm64-darwin
for x86_64-darwin: https://rubygems.org/gems/google-protobuf/versions/3.20.0-x86_64-darwin

[BobbyMcWho]

This is an unexpected change from what I'm reading in the changelog as well.

[BobbyMcWho]

It was likely caused by #9657 if I had to guess.

[msakrejda]

You mean arm64, right?

[deecewan]

yes 🤦‍♂️ thanks @uhoh-itsmaciek

[JoshCheek]

I haven't investigated whether there's a reason for this, but:

Depends on Ruby >= 2.3

• 3.20.0
• 3.20.0-java

Depends on Ruby >= 2.5, < 3.1.DEV

• 3.20.0-x64-mingw32

Depends on Ruby >= 2.5, < 3.2.DEV

• 3.20.0-x86-mingw32
• 3.20.0-x86-linux
• 3.20.0-x86_64-darwin
• 3.20.0-x86_64-linux

Depends on Ruby >= 3.1, < 3.2.DEV

• 3.20.0-arm64-darwin

So there is not a single version of Ruby which works for all the platforms of 3.20.0 (eg x64-mingw32 requires < 3.1.DEV, and arm64-darwin requires >= 3.1). I checked 3.20.1, and it's the same way.

[lfittl]

It appears this is no longer an issue with newer versions, since the compiled gem version has been removed for ARM64 (and so it now builds things from source again, as before) - and therefore I think this can be closed.

% ruby -v
ruby 2.7.3p183 (2021-04-05 revision 6847ee089d) [arm64-darwin21]

% gem install google-protobuf
Fetching google-protobuf-3.21.4.gem
Building native extensions. This could take a while...
Successfully installed google-protobuf-3.21.4
Parsing documentation for google-protobuf-3.21.4
unable to convert "\xDB" from ASCII-8BIT to UTF-8 for lib/google/protobuf/descriptor_pb.rb, skipping
Installing ri documentation for google-protobuf-3.21.4
Done installing documentation for google-protobuf after 0 seconds
1 gem installed