Added the current keyword, documented it, and bumped the version

Author: OwenCochell

CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog 
 
+## 2.1.0
+
+Features Added:
+
+  - Added a new keyword, `current`, which will automatically select the current version/build to install
+
+Bug Fixes:
+
+  - Removed some junk debugging messages that would appear even if we are quieted.
+
+other Fixes:
+
+  - Added section to the readme that describes how to use keywords.
+
+
 ## 2.0.0
 
 Major changes!
@@ -9,7 +24,7 @@ This update mostly focuses on behind the scene bug
 fixes and improvements,
 but we do have some new features to offer.
 
-  Features Added:
+Features Added:
 
   - Added the ability to check the integrity of the file using the SHA256 hash provided by the PaperMC API
   - Implemented a very basic caching system to reduce the number of calls made to the PaperMC API

README.md

@@ -180,6 +180,30 @@ Copies the old file to a new location before the installation process:
 Displays stats on the selected version and build:
 >-s, --stats
 
+## Special Keywords
+
+The `-v`, `-b`, and interactive menu have special keywords
+that can be used to do special things.
+
+The `latest` keyword will automatically select the latest option available.
+
+The `current` keyword will automatically select the currently installed currently installed value.
+
+For example, lets say you have paper version 1.17 and build 60 installed.
+If you want to get the latest build while maintaining your installed version,
+then you can run server update like so:
+
+>python server_update.py -v current [PATH]
+
+This will only install new builds for your current version.
+You can also use the `current` keyword to ensure that the version
+will never change, regardless of what you have installed.
+
+These keywords can be used in the interactive menu as well.
+You can also use these keywords for selecting the build,
+although using the `current` keyword for build selection is not recommended! 
+
+
 ## Deprecated Command Line Options
 
 The following command line options are deprecated. They are still included for backwards compatibility,
@@ -314,6 +338,9 @@ Great if you want to set up a new server install.
 Copy the old file to a new location before the installation process:
 >python server_update.py --copy-old /new/spot/old.jar [PATH]
 
+Select the currently installed version as the version to install:
+>python server_update.py -v current [PATH]
+
 # Notes on Deprecated Features
 
 In earlier versions of PaperMC-Update, the script would keep a config file in the users home directory

server_update.py

@@ -31,7 +31,7 @@
 A Set of tools to automate the server update process.
 """
 
-__version__ = '2.0.0'
+__version__ = '2.1.0'
 
 
 def load_config(config: str) -> Tuple[str, int]:
@@ -1447,7 +1447,7 @@ def _select(self, val: Any, choice: Sequence[Any], default: str, name: str, prin
         """
         Selects a value from the choices.
         We support updater keywords,
-        like 'latest' and ''.
+        like 'latest', 'current' and ''.
 
         :param val: Value entered
         :type val: Any
@@ -1481,6 +1481,12 @@ def _select(self, val: Any, choice: Sequence[Any], default: str, name: str, prin
 
             return val
 
+        if val == 'current':
+            
+            # User wants currently installed version:
+            
+            val = self.version
+
         if val not in choice:
 
             # User selected invalid option