nixosOptionsDoc: Add markdownByDefault parameter

nixos/lib/make-options-doc/mergeJSON.py

@@ -203,6 +203,9 @@ def convertMD(options: Dict[str, Any]) -> str:
     for (name, option) in options.items():
         if optionIs(option, 'description', 'mdDoc'):
             option['description'] = convertString(name, option['description']['text'])
+        elif markdownByDefault:
+            option['description'] = convertString(name, option['description'])
+
         if optionIs(option, 'example', 'literalMD'):
             docbook = convertString(name, option['example']['text'])
             option['example'] = { '_type': 'literalDocBook', 'text': docbook }
@@ -214,6 +217,7 @@ def convertMD(options: Dict[str, Any]) -> str:
 
 warningsAreErrors = False
 errorOnDocbook = False
+markdownByDefault = False
 optOffset = 0
 for arg in sys.argv[1:]:
     if arg == "--warnings-are-errors":
@@ -222,6 +226,9 @@ for arg in sys.argv[1:]:
     if arg == "--error-on-docbook":
         optOffset += 1
         errorOnDocbook = True
+    if arg == "--markdown-by-default":
+        optOffset += 1
+        markdownByDefault = True
 
 options = pivot(json.load(open(sys.argv[1 + optOffset], 'r')))
 overrides = pivot(json.load(open(sys.argv[2 + optOffset], 'r')))