runner: Add support for ruby/setup-ruby #224
Merged
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It turned out previous versions of runner images were unable to run actions that require
AGENT_TOOLSDIRECTORYorlibyamlto exist in the runner environment. One of notable examples of such actions isruby/setup-ruby.This change adds the support for those actions, by setting up AGENT_TOOLSDIRECTORY and installing libyaml-dev within runner images.
Note that to use
ruby/setup-rubyon the runner, you need to use the code like the below. SettingImageOsenv is especially important. See ruby/setup-ruby#111 for more details.