Add option --require to load custom Ruby code (#574)

lib/github_changelog_generator/generator/generator_generation.rb

@@ -6,6 +6,7 @@ module GitHubChangelogGenerator
     #
     # @return [String] Generated change log file
     def compound_changelog
+      options.load_custom_ruby_files
       fetch_and_filter_tags
       fetch_issues_and_pr
 

lib/github_changelog_generator/options.rb

@@ -43,6 +43,7 @@ module GitHubChangelogGenerator
       pulls
       release_branch
       release_url
+      require
       simple_list
       since_tag
       ssl_ca_file
@@ -69,6 +70,13 @@ module GitHubChangelogGenerator
       values
     end
 
+    # Loads the configured Ruby files from the --require option.
+    #
+    # @return [void]
+    def load_custom_ruby_files
+      self[:require].each { |f| require f }
+    end
+
     private
 
     def values

lib/github_changelog_generator/parser.rb

@@ -181,6 +181,9 @@ module GitHubChangelogGenerator
         opts.on("--ssl-ca-file [PATH]", "Path to cacert.pem file. Default is a bundled lib/github_changelog_generator/ssl_certs/cacert.pem. Respects SSL_CA_PATH.") do |ssl_ca_file|
           options[:ssl_ca_file] = ssl_ca_file
         end
+        opts.on("--require x,y,z", Array, "Path to Ruby file(s) to require.") do |paths|
+          options[:require] = paths
+        end
         opts.on("--[no-]verbose", "Run verbosely. Default is true") do |v|
           options[:verbose] = v
         end
@@ -226,7 +229,8 @@ module GitHubChangelogGenerator
         bug_prefix: "**Fixed bugs:**",
         enhancement_prefix: "**Implemented enhancements:**",
         breaking_prefix: "**Breaking changes:**",
-        http_cache: true
+        http_cache: true,
+        require: []
       )
     end
   end