Add GitHub Actions + bump.rake to maintain ruby versions

Using bump.rake also necessitated renaming MIT-LICENSE to LICENSE.txt,
for uniformity with my other gems that use this same rake file.

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ["3.1", "3.2", "3.3"]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true # runs `bundle install` and caches installed gems automatically
+
+      - name: Run tests
+        run: bundle exec rake test
+
+  rubocop:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3.6"
+          bundler-cache: true # runs `bundle install` and caches installed gems automatically
+
+      - name: Run rubocop
+        run: bundle exec rubocop

Gemfile.lock

@@ -286,4 +286,4 @@ DEPENDENCIES
   statusable!
 
 BUNDLED WITH
-   2.3.27
+   2.5.23

LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2024 Paul DobbinSchmaltz
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

rakelib/bump.rake

@@ -0,0 +1,106 @@
+# frozen_string_literal: true
+
+require "date"
+require "open-uri"
+require "yaml"
+
+desc "Update Bundler version, Ruby version, and LICENSE year in relevant files"
+task :bump do
+  run_tasks(%w[
+    bump:bundler
+    bump:ruby
+    bump:year
+  ])
+end
+
+namespace :bump do
+  desc "Update Bundler version to latest in Gemfile.lock"
+  task :bundler do
+    version = Gem.latest_version_for("bundler").to_s
+    replace_in_file("Gemfile.lock", /^BUNDLED WITH\n\s+(\d\S+)$/ => version)
+  end
+
+  desc "Update Ruby version targets in relevant files"
+  task :ruby do
+    replace_in_file(
+      "statusable.gemspec",
+      /ruby_version = .*">= (.*)"/ => RubyVersions.lowest_supported_minor)
+    replace_in_file(
+      ".rubocop.yml",
+      /TargetRubyVersion: (.*)/ => RubyVersions.lowest_supported_minor)
+    replace_in_file(
+      ".github/workflows/ci.yml",
+      /ruby-version: "([\d.]+)"/ => RubyVersions.latest)
+    replace_in_file(
+      ".github/workflows/ci.yml",
+      /ruby-version: (\[(?:"[\d.]+"(?:, )?)*\])/ =>
+        RubyVersions.latest_supported_minors.to_s)
+  end
+
+  desc "Update year to current in LICENSE.txt"
+  task :year do
+    replace_in_file("LICENSE.txt", /\(c\) (\d+)/ => Date.today.year.to_s)
+  end
+end
+
+def replace_in_file(path, replacements)
+  file_contents = File.read(path)
+  original_file_contents = file_contents.dup
+
+  replacements.each do |regex, text|
+    raise "Can't find #{regex} in #{path}" unless regex.match?(file_contents)
+
+    file_contents.gsub!(regex) do |match|
+      match[regex, 1] = text
+      match
+    end
+  end
+
+  File.write(path, file_contents) if file_contents != original_file_contents
+end
+
+# RubyVersions extracts current Ruby versions info from
+# https://raw.githubusercontent.com/ruby/www.ruby-lang.org/HEAD/_data/downloads.yml
+# -- which specifies the Ruby releases that will be listed on
+# https://www.ruby-lang.org/en/downloads/
+module RubyVersions
+  MINOR_VERSION_REGEX = /\d+\.\d+/
+  RUBY_VERSIONS_YAML_PATH =
+    "https://raw.githubusercontent.com/ruby/www.ruby-lang.org/HEAD/_data/downloads.yml"
+  VERSION_TYPES = %i[
+    security_maintenance
+    stable
+  ].freeze
+
+  def self.latest
+    latest_supported_patches.last
+  end
+
+  def self.latest_supported_minors
+    latest_supported_patches.map { |version_string|
+      version_string[MINOR_VERSION_REGEX]
+    }
+  end
+
+  def self.latest_supported_patches
+    @latest_supported_patches ||= begin
+      patches =
+        versions.fetch_values(*VERSION_TYPES).tap(&:flatten!).tap(&:compact!)
+      patches.map { |patch| Gem::Version.new(patch) }.sort!.map(&:to_s)
+    end
+  end
+
+  def self.lowest_supported_minor
+    latest_supported_patches.first[MINOR_VERSION_REGEX]
+  end
+
+  private
+
+  def self.versions
+    @versions ||= begin
+      raw_yaml = URI.parse(RUBY_VERSIONS_YAML_PATH).open
+      YAML.safe_load(raw_yaml, symbolize_names: true)
+    end
+  end
+  private_class_method :versions
+end