1 files changed, 66 insertions, 0 deletions
diff --git a/tool/gen-github-release.rb b/tool/gen-github-release.rb
new file mode 100755
index 0000000000..cdb66080d9
--- /dev/null
+++ b/tool/gen-github-release.rb
@@ -0,0 +1,66 @@
+#!/usr/bin/env ruby
+
+if ARGV.size < 2
+  puts "Usage: #{$0} <from version tag> <to version tag> [--no-dry-run]"
+  puts "     : if --no-dry-run is specified, it will create a release on GitHub"
+  exit 1
+end
+
+require "bundler/inline"
+
+gemfile do
+  source "https://rubygems.org"
+  gem "octokit"
+  gem "faraday-retry"
+  gem "nokogiri"
+end
+
+require "open-uri"
+
+Octokit.configure do |c|
+  c.access_token = ENV['GITHUB_TOKEN']
+  c.auto_paginate = true
+  c.per_page = 100
+end
+
+client = Octokit::Client.new
+
+note =  "## What's Changed\n\n"
+
+notes = []
+
+diff = client.compare("ruby/ruby", ARGV[0], ARGV[1])
+diff[:commits].each do |c|
+  if c[:commit][:message] =~ /\[(Backport|Feature|Bug) #(\d*)\]/
+    url = "https://bugs.ruby-lang.org/issues/#{$2}"
+    title = Nokogiri::HTML(URI.open(url)).title
+    title.gsub!(/ - Ruby master - Ruby Issue Tracking System/, "")
+  elsif c[:commit][:message] =~ /\(#(\d*)\)/
+    url = "https://github.com/ruby/ruby/pull/#{$1}"
+    title = Nokogiri::HTML(URI.open(url)).title
+    title.gsub!(/ · ruby\/ruby · GitHub/, "")
+  else
+    next
+  end
+  notes << "* [#{title}](#{url})"
+rescue OpenURI::HTTPError
+  puts "Error: #{url}"
+end
+
+notes.uniq!
+
+note << notes.join("\n")
+
+note << "\n\n"
+note << "Note: This list is automatically generated by tool/gen-github-release.rb. Because of this, some commits may be missing.\n\n"
+note << "## Full Changelog\n\n"
+note << "https://github.com/ruby/ruby/compare/#{ARGV[0]}...#{ARGV[1]}\n\n"
+
+if ARGV[2] == "--no-dry-run"
+  name = ARGV[1].gsub(/^v/, "").gsub(/_/, ".")
+  prerelease = ARGV[1].match?(/rc|preview/) ? true : false
+  client.create_release("ruby/ruby", ARGV[1], name: name, body: note, make_latest: "false", prerelease: prerelease)
+  puts "Created a release: https://github.com/ruby/ruby/releases/tag/#{ARGV[1]}"
+else
+  puts note
+end