Add MRI 2.5 to the known Ruby versions.

[pat]

As discussed in #109, here are the changes required for MRI 2.5 support.

[coveralls]

Coverage remained the same at 92.095% when pulling a4ec962 on pat:mri2.5.0 into 9dcc4d9 on aws:master.

[pat]

Also: if it's useful, I can submit another PR that extends the tested Ruby versions to cover the latest 2.x releases (rather than just 2.3) - though it's a simple enough change for a maintainer to do directly :)

[apeeters]

Would be nice to have this included soon since it is required for the Ubuntu Bionic release next Monday. Also an update of the dependencies of the deb package is needed.

[analytically]

"Current running Ruby version for root is 2.5.1, but Ruby version 2.x needs to be installed." when running on Ubuntu 18.04

[carlnordenfelt]

I raised this issue before I saw this PR: #158

The PR seems to have 2.5.0 as the upper boundary, not sure if it matters but a clean ruby install on 18.04 gives:

ruby --version
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu]

Also note that I stumbled on another problem even after symlinking 2.4 to 2.5 to bypass the version check, that problem might be related to something else though.

[pat]

This is not a recommendation - I'm not yet using this seriously in production - but how I've gone about installing things:

As noted by others here, the underlying package has a dependency on ruby2.0/ruby2.1/ruby2.2/ruby2.3. To work around this, I've got another branch that installs the package while ignoring the Ruby requirements (I've already compiled Ruby manually), and I use that instead:

wget "https://raw.githubusercontent.com/pat/aws-codedeploy-agent/mri2.5.0-no-dep/bin/install"

chmod +x ./install
sudo ./install auto

Use with extreme caution, and test thoroughly :)

[fleaz]

Hi @rohkat-aws, any updates on adding Ruby 2.5 support?
I don't want to sound rude or create any preasure but this PR is now half a year old and with the missing 2.5 support, many distros (incl. current Ubuntu LTS) are not able to install the CDA without any tinkering on the system.

I sadly have no Ruby experience, but let me now if I can help with anything :)

Best regards and thanks for your work!