Show whether or not the git wdir is dirty in version

Closes #1073

config.py

@@ -96,9 +96,21 @@ def git_shorthash_from_head() -> str:
     """
     Determine short hash for current git HEAD.
 
+    Includes -DIRTY if any changes have been made from HEAD
+
     :return: str - None if we couldn't determine the short hash.
     """
     shorthash: str = None  # type: ignore
+    dirty = False
+
+    with contextlib.suppress(Exception):
+        result = subprocess.run('git diff --stat HEAD'.split(), capture_output=True)
+        if len(result.stdout) > 0:
+            dirty = True
+
+        if len(result.stderr) > 0:
+            logger.warning(f'Data from git on stderr:\n{str(result.stderr)}')
+
     try:
         git_cmd = subprocess.Popen('git rev-parse --short HEAD'.split(),
                                    stdout=subprocess.PIPE,
@@ -115,7 +127,7 @@ def git_shorthash_from_head() -> str:
             logger.error(f"'{shorthash}' doesn't look like a valid git short hash, forcing to None")
             shorthash = None  # type: ignore
 
-    return shorthash
+    return shorthash + ('-WORKING-DIR-IS-DIRTY' if dirty else '')
 
 
 def appversion() -> semantic_version.Version: