Add a simple, stupid ClrMamePro DAT sorter

scripts/clrmamepro-sorter.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+# This implements a very stupid ClrMamePro DAT file sorter. It expects a DAT
+# file to be "well formed", so everything except the first level should be
+# indented, since that is used to lump lines together into one "entry".
+
+import re
+import sys
+
+from typing import List
+
+
+START_STANZA = re.compile(r'([a-z0-9]+)\s*\(', re.IGNORECASE)
+VALID_START = {'clrmamepro', 'game'}
+
+
+def sortdat(lines: str) -> str:
+    data: List[str] = []
+    curline: str = ''
+    for line in lines.split('\n'):
+        start = START_STANZA.match(line)
+        if start:
+            if start.group(1) not in VALID_START:
+                raise Exception("File doesn't look like a valid DAT file!")
+            if curline != '':
+                data.append(curline)
+            curline = line
+        else:
+            curline += '\n' + line
+    if curline != '':
+        data.append(curline)
+
+    return '\n'.join(sorted(data))
+
+
+if __name__ == '__main__':
+    for file in sys.argv[1:]:
+        print(f'Sorting {file}')
+        with open(file, 'r') as infile:
+            content = sortdat(infile.read())
+        with open(file, 'w') as outfile:
+            outfile.write(content)