Update CI configuration and gemspec

.github/workflows/test.yml

@@ -3,6 +3,7 @@ on: [push, pull_request]
 jobs:
   test:
     strategy:
+      fail-fast: false
       matrix:
         ruby: [2.5, 2.6, 2.7, '3.0', 3.1, 3.2, 3.3, head, jruby, jruby-head, truffleruby, truffleruby-head]
     runs-on: ubuntu-latest
@@ -11,5 +12,6 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
+          bundler-cache: true
           ruby-version: ${{ matrix.ruby }}
-      - run: rake
+      - run: bundle exec rake

.gitignore

@@ -3,3 +3,4 @@
 TAGS
 html
 pkg
+Gemfile.lock

Gemfile

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+source "https://rubygems.org"
+
+# Specify your gem's dependencies in heap-profiler.gemspec
+gemspec
+
+gem "rake"
+gem "minitest"

builder.gemspec

@@ -1,22 +1,12 @@
 # frozen_string_literal: true
 require './lib/builder/version'
 
-PKG_VERSION = Builder::VERSION
-
-PKG_FILES = Dir[
-  '[A-Z]*',
-  'doc/**/*',
-  'lib/**/*.rb',
-  'test/**/*.rb',
-  'rakelib/**/*'
-]
-
 Gem::Specification.new do |s|
 
   #### Basic information.
 
   s.name = 'builder'
-  s.version = PKG_VERSION
+  s.version = Builder::VERSION
   s.summary = "Builders for MarkUp."
   s.description = %{\
 Builder provides a number of builder objects that make creating structured data
@@ -26,12 +16,19 @@ simple to do.  Currently the following builder objects are supported:
 * XML Events
 }
 
-  s.files = PKG_FILES
+  pkg_files = Dir[
+    '[A-Z]*',
+    'doc/**/*',
+    'lib/**/*.rb',
+    'test/**/*.rb',
+    'rakelib/**/*'
+  ]
+
+  s.files = pkg_files
   s.require_path = 'lib'
 
-  s.test_files = PKG_FILES.select { |fn| fn =~ /^test\/test/ }
+  s.test_files = pkg_files.select { |fn| fn =~ /^test\/test/ }
 
-  s.has_rdoc = true
   # s.extra_rdoc_files = rd.rdoc_files.reject { |fn| fn =~ /\.rb$/ }.to_a
   s.rdoc_options <<
     '--title' <<  'Builder -- Easy XML Building' <<

rakelib/tags.rake

@@ -14,7 +14,7 @@ module Tags
   PROJECT_DIR = ['.']
 
   RVM_GEMDIR = File.join(`rvm gemdir`.strip, "gems") rescue nil
-  SYSTEM_DIRS = RVM_GEMDIR && File.exists?(RVM_GEMDIR) ? RVM_GEMDIR : []
+  SYSTEM_DIRS = RVM_GEMDIR && File.exist?(RVM_GEMDIR) ? RVM_GEMDIR : []
 
   module_function