Updates for current ruby

.github/workflows/tests.yml

@@ -0,0 +1,22 @@
+name: Run Tests
+
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Ruby ${{ matrix.ruby }}
+    strategy:
+      matrix:
+        ruby: [2.7, 3.0, 3.1, 3.2]
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - name: Run linter for Ruby
+      run: bundle exec standardrb
+    - name: Run tests
+      run: bundle exec rspec

.gitignore

@@ -10,6 +10,7 @@ doc
 
 # bundler
 .bundle
+vendor/
 
 # jeweler generated
 pkg
@@ -42,3 +43,5 @@ pkg
 #*.swp
 #
 Gemfile.lock
+
+.idea/

Gemfile

@@ -1,9 +1,10 @@
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 # Specify your gem's dependencies in test.gemspec
 gemspec
 
-
-gem 'rcov', :platform => :mri_18
-gem 'simplecov', :platform => :mri_19
-gem 'simplecov-rcov', :platform => :mri_19
+group :development, :test do
+  gem "simplecov"
+  gem "standardrb"
+  gem "simplecov-lcov"
+end

README.md

@@ -1,10 +1,31 @@
+[![Tests](https://github.com/ruby-microservices/pairtree/actions/workflows/tests.yml/badge.svg)](https://github.com/ruby-microservices/pairtree/actions/workflows/tests.yml)
+[![Ruby Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://github.com/testdouble/standard)
+
 # pairtree
 
-Ruby implementation of the [Pairtree](https://confluence.ucop.edu/display/Curation/PairTree microservice specification from the California Digital Librar)
+Ruby implementation of the [Pairtree](https://www.ietf.org/archive/id/draft-kunze-pairtree-01.txt) specification from the California Digital Library.
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'pairtree'
+```
+
+And then execute:
 
-# Usage
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install pairtree
+
+## Usage
 
 ```ruby
+  require 'pairtree'
+
   # Initiate a tree
   pairtree = Pairtree.at('./data', :prefix => 'pfx:', :create => true)
 
@@ -29,9 +50,7 @@ Ruby implementation of the [Pairtree](https://confluence.ucop.edu/display/Curati
   # Delete a ppath and all its contents
   pairtree.purge!('pfx:abc123def')
 ```
-
-##  Copyright
 
-Copyright (c) 2010 Chris Beer. See LICENSE.txt for
-further details.
+##  Copyright
 
+Copyright (c) 2010 Chris Beer. See LICENSE.txt for further details.

Rakefile

@@ -1,45 +1,37 @@
-require 'rubygems'
-require 'bundler'
+require "rubygems"
+require "bundler"
 begin
   Bundler.setup(:default, :development)
 rescue Bundler::BundlerError => e
-  $stderr.puts e.message
-  $stderr.puts "Run `bundle install` to install missing gems"
+  warn e.message
+  warn "Run `bundle install` to install missing gems"
   exit e.status_code
 end
 
 Bundler::GemHelper.install_tasks
 
-require 'rake'
-require 'rspec'
-require 'rspec/core/rake_task'
+require "rake"
+require "rspec"
+require "rspec/core/rake_task"
 
-desc 'Default: run specs.'
-task :default => :spec
-
-RSpec::Core::RakeTask.new do |t|
-  if ENV['COVERAGE'] and RUBY_VERSION =~ /^1.8/
-    t.rcov = true
-    t.rcov_opts = ['--exclude', 'spec', '--exclude', 'gems']
-  end
-end
+desc "Default: run specs."
+task default: :spec
 
 # Use yard to build docs
 begin
-  require 'yard'
-  require 'yard/rake/yardoc_task'
-  project_root = File.expand_path(File.dirname(__FILE__))
-  doc_destination = File.join(project_root, 'doc')
+  require "yard"
+  require "yard/rake/yardoc_task"
+  project_root = __dir__
+  doc_destination = File.join(project_root, "doc")
 
   YARD::Rake::YardocTask.new(:doc) do |yt|
-    yt.files   = Dir.glob(File.join(project_root, 'lib', '**', '*.rb')) + 
-                 [ File.join(project_root, 'README.md') ]
-    yt.options = ['--output-dir', doc_destination, '--readme', 'README.md']
+    yt.files = Dir.glob(File.join(project_root, "lib", "**", "*.rb")) +
+      [File.join(project_root, "README.md")]
+    yt.options = ["--output-dir", doc_destination, "--readme", "README.md"]
   end
 rescue LoadError
   desc "Generate YARD Documentation"
   task :doc do
     abort "Please install the YARD gem to generate rdoc."
   end
 end
-

lib/pairtree.rb

@@ -1,17 +1,19 @@
-require 'pairtree/identifier'
-require 'pairtree/path'
-require 'pairtree/obj'
-require 'pairtree/root'
+require "pairtree/identifier"
+require "pairtree/path"
+require "pairtree/obj"
+require "pairtree/root"
 
-require 'fileutils'
+require "fileutils"
 
 module Pairtree
-  class IdentifierError < Exception; end
-  class PathError < Exception; end
-  class VersionMismatch < Exception; end
+  class IdentifierError < RuntimeError; end
+
+  class PathError < RuntimeError; end
+
+  class VersionMismatch < RuntimeError; end
 
   SPEC_VERSION = 0.1
-  
+
   ##
   # Instantiate a pairtree at a given path location
   # @param [String] path The path in which the pairtree resides
@@ -20,34 +22,34 @@ class VersionMismatch < Exception; end
   # @option args [String] :version (Pairtree::SPEC_VERSION) the version of the pairtree spec that this tree conforms to
   # @option args [Boolean] :create (false) if true, create the pairtree and its directory structure if it doesn't already exist
   def self.at path, args = {}
-    args = { :prefix => nil, :version => nil, :create => false }.merge(args)
+    args = {prefix: nil, version: nil, create: false}.merge(args)
     args[:version] ||= SPEC_VERSION
     args[:version] = args[:version].to_f
-    
-    root_path = File.join(path, 'pairtree_root')
-    prefix_file = File.join(path, 'pairtree_prefix')
+
+    root_path = File.join(path, "pairtree_root")
+    prefix_file = File.join(path, "pairtree_prefix")
     version_file = File.join(path, pairtree_version_filename(args[:version]))
-    existing_version_file = Dir[File.join(path, "pairtree_version*")].sort.last
-    
+    existing_version_file = Dir[File.join(path, "pairtree_version*")].max
+
     if args.delete(:create)
-      if File.exists?(path) and not File.directory?(path)
+      if File.exist?(path) && !File.directory?(path)
         raise PathError, "#{path} exists, but is not a valid pairtree root"
       end
       FileUtils.mkdir_p(root_path)
 
-      unless File.exists? prefix_file
-        File.open(prefix_file, 'w') { |f| f.write(args[:prefix].to_s) }
+      unless File.exist? prefix_file
+        File.write(prefix_file, args[:prefix].to_s)
       end
-      
+
       if existing_version_file
         if existing_version_file != version_file
-          stored_version = existing_version_file.scan(/([0-9]+)_([0-9]+)/).flatten.join('.').to_f
+          stored_version = existing_version_file.scan(/([0-9]+)_([0-9]+)/).flatten.join(".").to_f
           raise VersionMismatch, "Version #{args[:version]} specified, but #{stored_version} found."
         end
       else
         args[:version] ||= SPEC_VERSION
         version_file = File.join(path, pairtree_version_filename(args[:version]))
-        File.open(version_file, 'w') { |f| f.write %{This directory conforms to Pairtree Version #{args[:version]}. Updated spec: http://www.cdlib.org/inside/diglib/pairtree/pairtreespec.html} }
+        File.write(version_file, %(This directory conforms to Pairtree Version #{args[:version]}. Updated spec: http://www.cdlib.org/inside/diglib/pairtree/pairtreespec.html))
         existing_version_file = version_file
       end
     else
@@ -57,22 +59,25 @@ def self.at path, args = {}
     end
 
     stored_prefix = File.read(prefix_file)
-    unless args[:prefix].nil? or args[:prefix].to_s == stored_prefix
+    unless args[:prefix].nil? || (args[:prefix].to_s == stored_prefix)
       raise IdentifierError, "Specified prefix #{args[:prefix].inspect} does not match stored prefix #{stored_prefix.inspect}"
     end
     args[:prefix] = stored_prefix
 
-    stored_version = existing_version_file.scan(/([0-9]+)_([0-9]+)/).flatten.join('.').to_f
+    stored_version = existing_version_file.scan(/([0-9]+)_([0-9]+)/).flatten.join(".").to_f
     args[:version] ||= stored_version
     unless args[:version] == stored_version
       raise VersionMismatch, "Version #{args[:version]} specified, but #{stored_version} found."
     end
-        
-    Pairtree::Root.new(File.join(path, 'pairtree_root'), args)
+
+    Pairtree::Root.new(File.join(path, "pairtree_root"), args)
   end
 
-  private
-  def self.pairtree_version_filename(version)
-    "pairtree_version#{version.to_s.gsub(/\./,'_')}"
+  class << self
+    private
+
+    def pairtree_version_filename(version)
+      "pairtree_version#{version.to_s.tr(".", "_")}"
+    end
   end
 end

lib/pairtree/identifier.rb

@@ -7,28 +7,45 @@ class Identifier
     # Encode special characters within an identifier
     # @param [String] id The identifier
     def self.encode id
-      id.gsub(ENCODE_REGEX) { |c| char2hex(c) }.tr('/:.', '=+,')
+      id.gsub(ENCODE_REGEX) { |c| char2hex(c) }.tr("/:.", "=+,")
     end
 
     ##
     # Decode special characters within an identifier
     # @param [String] id The identifier
     def self.decode id
-      id.tr('=+,', '/:.').gsub(DECODE_REGEX) { |h| hex2char(h) } 
+      input = id.tr("=+,", "/:.").bytes.to_a
+      intermediate = []
+      while input.first
+        if input.first == 94
+          h = []
+          input.shift
+          h << input.shift
+          h << input.shift
+          intermediate << h.pack("c*").hex
+        else
+          intermediate << input.shift
+        end
+      end
+      result = intermediate.pack("c*")
+      if result.respond_to? :force_encoding
+        result.force_encoding("UTF-8")
+      end
+      result
     end
 
     ##
     # Convert a character to its pairtree hexidecimal representation
     # @param [Char] c The character to convert
     def self.char2hex c
-      c.unpack('H*')[0].scan(/../).map { |x| "^#{x}"}.join('')
+      c.unpack1("H*").scan(/../).map { |x| "^#{x}" }.join("")
     end
 
     ##
     # Convert a pairtree hexidecimal string to its character representation
     # @param [String] h The hexidecimal string to convert
     def self.hex2char h
-       '' << h.delete('^').hex
+      "" << h.delete("^").hex
     end
   end
 end