lib/cli: Implement the "Additional Info" feature

src/lib/cli.cpp

@@ -1,5 +1,8 @@
 // Copyright 2022, FOSS-VG Developers and Contributers
 //
+// Author(s):
+//  BodgeMaster, Shwoomple
+//
 // This program is free software: you can redistribute it and/or modify it
 // under the terms of the GNU Affero General Public License as published
 // by the Free Software Foundation, version 3.
@@ -318,6 +321,10 @@ namespace CLI {
             }
         }
 
+        if (this->additionalInfo != "") {
+            usageString += "\nAdditional Info:\n\n\t" + this->additionalInfo + "\n";
+        }
+
         return usageString;
     }
 }

src/test/cli_argument_parser.cpp

@@ -746,5 +746,19 @@ int main() {
     ASSERT(noCLIParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator \n");
     std::cout << "Passed no CLI input usage test." << std::endl;
 
+    // additional info test ############################################
+    std::vector<CLI::Flag> additionalInfoCLIFlags;
+
+    std::vector<CLI::Option> additionalInfoCLIOptions;
+
+    std::vector<CLI::Argument> additionalInfoCLIArguments;
+
+    const char** additionalInfoCLICommand = new const char*[1];
+    additionalInfoCLICommand[0] = "universecreator";
+    CLI::ArgumentsParser additionalInfoCLIParser = CLI::ArgumentsParser(1, additionalInfoCLICommand, additionalInfoCLIFlags, additionalInfoCLIOptions, additionalInfoCLIArguments, "Create a universe with a banana and an apple.", "Rick Astley was here.");
+
+    ASSERT(additionalInfoCLIParser.getUsage() == "Help: universecreator\n\n\tCreate a universe with a banana and an apple.\n\nUsage: universecreator \n\nAdditional Info:\n\n\tRick Astley was here.\n");
+    std::cout << "Passed additional info test." << std::endl;
+
     return 0;
 }