CI: Rubinius as rbx-3.107, on Trusty

[olleolleolle]

This PR tries to make Rubinius CI builds work.

Solution

Travis config for Rubinius:

• use the rbx-3.107 moniker seen in CI: Try to use 3.107, extend version name pattern, allow osx failures rubinius/travis-canary#3
• in allowed_failures: Use the name property to find the matrix member (to reduce churn if trying new versions)
• point out macOS and which osx image to use
• use Trusty

(The macOS attempts failed. llvm missing c++ libraries. Libraries missing for rbx-3.107: /usr/local/opt/llvm/lib/libc++.1.dylib. Refer to your system manual for installing libraries)

Background

Our Travis file's Rubinius build config is set with rbx-3 which does not resolve in rvm to anything installable.

Compared to a 2019 working build, in Rubinius's canary repo at https://travis-ci.org/rubinius/travis-canary/builds/488215948/config

Travis has information:

• http://rubies.travis-ci.org/rubinius

[olleolleolle]

Right, no binaries to install for this (edit: for this platform).

9.75s$ rvm use rbx-3.107 --install --binary --fuzzy
curl: (22) The requested URL returned error: 404 Not Found
Required rbx-3.107 is not installed - installing.
curl: (22) The requested URL returned error: 404 Not Found
Searching for binary rubies, this might take some time.
Requested binary installation but no rubies are available to download, consider skipping --binary flag.
Gemset '' does not exist, 'rvm rbx-3.107 do rvm gemset create ' first, or append '--create'.
The command "rvm use rbx-3.107 --install --binary --fuzzy" failed and exited with 2 during .

[olleolleolle]

Aha, https://docs.travis-ci.com/user/languages/ruby/#rubinius

If you’re using macOS or Trusty environments, you can also use Rubinius. To test with Rubinius, add rbx-X or rbx-X.Y.Z to your .travis.yml, where X.Y.Z specifies a Rubinius release listed on http://rubies.travis-ci.org/rubinius .

[olleolleolle]

Learning more at:

https://docs.travis-ci.com/user/reference/osx/

http://rubies.travis-ci.org/rubinius

[olleolleolle]

Alright, new error: now the compiler can't be found.

$ rvm use rbx-3.107 --install --binary --fuzzy
curl: (22) The requested URL returned error: 404 Not Found
rbx-3.107 is not installed - installing.
curl: (22) The requested URL returned error: 404 Not Found
Searching for binary rubies, this might take some time.
Found remote file http://binaries.rubini.us/osx/10.10/x86_64/rubinius-3.107.tar.bz2
rbx-3.107 - #configure
rbx-3.107 - #download
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0   151    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 9867k  100 9867k    0     0  6049k      0  0:00:01  0:00:01 --:--:-- 8644k
No checksum for downloaded archive, recording checksum in user configuration.
rbx-3.107 - #validate archive
rbx-3.107 - #extract
rbx-3.107 - #validate binary
Libraries missing for rbx-3.107: /usr/local/opt/llvm/lib/libc++.1.dylib. Refer to your system manual for installing libraries
Mounting remote ruby failed with status 10, stopping installation.
Gemset '' does not exist, 'rvm rbx-3.107 do rvm gemset create ' first, or append '--create'.
The command "rvm use rbx-3.107 --install --binary --fuzzy" failed and exited with 2 during .

[olleolleolle]

@pitr-ch I think this is ready for review, now!

[pitr-ch]

Good to have at least something running, thanks.