Improve script for listing versions

Author: eregon

versions-strings-for-builder.rb

@@ -2,21 +2,32 @@
 hash = File.read('ruby-builder-versions.json')
 versions = JSON.load(hash).transform_keys(&:to_sym)
 
-by_minor = versions[:ruby].group_by { |v| v[/^\d\.\d/] }
+ONLY_LATEST_PATCH = ENV['ONLY_LATEST_PATCH']
 
-by_minor.each_pair do |minor, versions|
-  puts versions.map { |v| "ruby-#{v}" }.join(', ') if minor
+def filter(versions)
+  versions -= %w[head]
+  if ONLY_LATEST_PATCH
+    versions = versions.group_by { |v| v[/^\d+\.\d+/] }.map { _2.last }
+  end
+  versions
 end
 
-puts
-puts (versions[:truffleruby] - %w[head]).map { |v| "truffleruby-#{v}" }.join(', ')
+if ONLY_LATEST_PATCH
+  puts filter(versions[:ruby]).map { |v| "ruby-#{v}" }.join(', ')
+else
+  by_minor = versions[:ruby].group_by { |v| v[/^\d+\.\d+/] }
+  by_minor.each_pair do |minor, versions|
+    puts versions.map { |v| "ruby-#{v}" }.join(', ') if minor
+  end
+end
 
 puts
-puts (versions[:"truffleruby+graalvm"] - %w[head]).map { |v| "truffleruby+graalvm-#{v}" }.join(', ')
+puts filter(versions[:truffleruby]).map { |v| "truffleruby-#{v}" }.join(', ')
 
 puts
-puts (versions[:jruby] - %w[head]).map { |v| "jruby-#{v}" }.join(', ')
+puts filter(versions[:"truffleruby+graalvm"]).map { |v| "truffleruby+graalvm-#{v}" }.join(', ')
 
-(versions[:jruby] - %w[head]).each do |v|
-  puts "- { os: windows-latest, jruby-version: #{v}, ruby: jruby-#{v} }"
-end
+puts
+puts filter(versions[:jruby]).map { |v| "jruby-#{v}" }.join(', ')
+puts "For Windows:"
+puts filter(versions[:jruby]).join(', ')