Prefer require_relative over path injection

`require_relative` is preferred over `require` for files within the same
project because it uses paths relative to the current file, making code
more portable and less dependent on the load path.

This change updates internal requires to use `require_relative` for
consistency, performance, and improved portability.

config.ru

@@ -4,15 +4,10 @@
 #
 # Rackup config for the Colore app
 #
-require 'pathname'
 require "sinatra"
 
-BASE = Pathname.new(__FILE__).realpath.parent
-$: << BASE
-$: << BASE + 'lib'
-require 'config/initializers/sidekiq'
-
-require 'app'
+require_relative 'config/initializers/sidekiq'
+require_relative 'lib/app'
 
 require 'sidekiq/web'
 require 'sidekiq/cron/web'

config/initializers/sidekiq.rb

@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
-require 'pathname'
 require 'sidekiq'
-require 'config'
+
+require_relative '../../lib/config'
 
 Sidekiq.configure_server do |config|
   config.redis = Colore::C_.redis

lib/app.rb

@@ -1,10 +1,11 @@
 # frozen_string_literal: true
 
-require 'pathname'
 require 'haml'
 require 'net/http'
-require 'sinatra/base'
+require 'pathname'
 require 'pp'
+require 'sinatra/base'
+
 require_relative 'colore'
 
 module Colore

lib/autoheathen.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
-require 'heathen'
+require_relative 'heathen'
+
 require_relative 'autoheathen/config'
 require_relative 'autoheathen/email_processor'

lib/autoheathen/email_processor.rb

@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
+require 'filemagic/ext'
+require 'haml'
+require 'logger'
 require 'mail'
+require 'pathname'
 require 'yaml'
-require 'logger'
-require 'haml'
-require 'filemagic/ext'
-require_relative 'config'
-require 'heathen'
 
 module AutoHeathen
   class EmailProcessor

lib/config.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'erb'
+require 'pathname'
 require 'yaml'
 
 Encoding.default_internal = 'UTF-8'

lib/converter.rb

@@ -2,7 +2,8 @@
 
 require 'filemagic/ext'
 require 'mime/types'
-require 'heathen'
+
+require_relative 'heathen'
 
 module Colore
   # The Colore Converter is a glue class to allow Colore to access the Heathen conversion

lib/doc_key.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'digest/md5'
+require 'pathname'
 
 module Colore
   # This is the unique identifier for a document, a composite of

lib/document.rb

@@ -1,9 +1,11 @@
 # frozen_string_literal: true
 
+require 'filemagic/ext'
+require 'fileutils'
+require 'json'
 require 'pathname'
 require 'stringio'
-require 'json'
-require 'filemagic/ext'
+
 require_relative 'doc_key'
 
 module Colore

lib/heathen.rb

@@ -2,7 +2,6 @@
 
 require 'filemagic/ext'
 require 'pathname'
-HEATHEN_BASE = Pathname.new(__FILE__).realpath.parent + 'heathen'
 
 require_relative 'heathen/errors'
 require_relative 'heathen/filename'
@@ -11,6 +10,10 @@
 require_relative 'heathen/converter'
 require_relative 'heathen/executioner'
 require_relative 'heathen/processor'
-Dir.glob((HEATHEN_BASE + 'processor_methods' + '*.rb').to_s).each do |method|
-  require_relative method
-end
+
+require_relative 'heathen/processor_methods/convert_image'
+require_relative 'heathen/processor_methods/htmltotext'
+require_relative 'heathen/processor_methods/libreoffice'
+require_relative 'heathen/processor_methods/pdftotext'
+require_relative 'heathen/processor_methods/tesseract'
+require_relative 'heathen/processor_methods/wkhtmltopdf'

lib/heathen/processor.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
+require 'fileutils'
 require 'logger'
+require 'pathname'
 
 module Heathen
   # The Processor is the heart of the Heathen conversion process. Mixed in to it are all

lib/heathen/processor_methods/libreoffice.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'fileutils'
+
 module Heathen
   class Processor
     DEV_SHM_PATH = '/dev/shm'

lib/legacy_converter.rb

@@ -1,10 +1,11 @@
 # frozen_string_literal: true
 
-require 'pathname'
+require 'digest/sha2'
 require 'filemagic/ext'
 require 'mime/types'
-require 'heathen'
-require 'digest/sha2'
+require 'pathname'
+
+require_relative 'heathen'
 
 module Colore
   # The Colore Legacy Converter provides the conversion functionality from

lib/sidekiq_app.rb

@@ -1,16 +1,5 @@
 # frozen_string_literal: true
 
-#
 # Application initializer for the Colore Sidekiq process. See (BASE/run_sidekiq) for usage.
-#
-#
-require 'pathname'
-require 'sidekiq'
-
-BASE = Pathname.new(__FILE__).realpath.parent.parent
-$: << BASE # for config initializers
-$: << BASE + 'lib'
-
-require 'config/initializers/sidekiq'
-
+require_relative '../config/initializers/sidekiq'
 require_relative 'colore'

spec/helpers/storage.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'fileutils'
+require 'pathname'
 
 def tmp_storage_dir
   Pathname.new('/tmp') + "colore_test.#{Process.pid}"

spec/spec_helper.rb

@@ -16,6 +16,7 @@
 
 require 'byebug'
 require 'logger'
+require 'pathname'
 require 'rack/test'
 require 'sidekiq/testing'
 require 'simplecov'