nixos/lib/make-options-doc: generate asciidoc/md in derivations

use the json file derivation we already have to also generate the asciidoc and
md options docs instead of formatting the options in nix. docbook docs are
already produced in derivations.

the new script produce the exact same output as the old in-nix generation.

nixos/lib/make-options-doc/default.nix

@@ -93,72 +93,20 @@ let
 
   optionsNix = builtins.listToAttrs (map (o: { name = o.name; value = removeAttrs o ["name" "visible" "internal"]; }) optionsList);
 
-  # TODO: declarations: link to github
+in rec {
-  singleAsciiDoc = name: value: ''
-    == ${name}
-
-    ${value.description}
-
-    [discrete]
-    === details
-
-    Type:: ${value.type}
-    ${ if lib.hasAttr "default" value
-       then ''
-        Default::
-        +
-        ----
-        ${builtins.toJSON value.default}
-        ----
-      ''
-      else "No Default:: {blank}"
-    }
-    ${ if value.readOnly
-       then "Read Only:: {blank}"
-      else ""
-    }
-    ${ if lib.hasAttr "example" value
-       then ''
-        Example::
-        +
-        ----
-        ${builtins.toJSON value.example}
-        ----
-      ''
-      else "No Example:: {blank}"
-    }
-  '';
-
-  singleMDDoc = name: value: ''
-    ## ${lib.escape [ "<" ">" ] name}
-    ${value.description}
-
-    ${lib.optionalString (value ? type) ''
-      *_Type_*:
-      ${value.type}
-    ''}
-
-    ${lib.optionalString (value ? default) ''
-      *_Default_*
-      ```
-      ${builtins.toJSON value.default}
-      ```
-    ''}
-
-    ${lib.optionalString (value ? example) ''
-      *_Example_*
-      ```
-      ${builtins.toJSON value.example}
-      ```
-    ''}
-  '';
-
-in {
   inherit optionsNix;
 
-  optionsAsciiDoc = lib.concatStringsSep "\n" (lib.mapAttrsToList singleAsciiDoc optionsNix);
+  optionsAsciiDoc = pkgs.runCommand "options.adoc" {} ''
+    ${pkgs.python3Minimal}/bin/python ${./generateAsciiDoc.py} \
+      < ${optionsJSON}/share/doc/nixos/options.json \
+      > $out
+  '';
 
-  optionsMDDoc = lib.concatStringsSep "\n" (lib.mapAttrsToList singleMDDoc optionsNix);
+  optionsCommonMark = pkgs.runCommand "options.md" {} ''
+    ${pkgs.python3Minimal}/bin/python ${./generateCommonMark.py} \
+      < ${optionsJSON}/share/doc/nixos/options.json \
+      > $out
+  '';
 
   optionsJSON = pkgs.runCommand "options.json"
     { meta.description = "List of NixOS options in JSON format";

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

@@ -0,0 +1,37 @@
+import json
+import sys
+
+options = json.load(sys.stdin)
+# TODO: declarations: link to github
+for (name, value) in options.items():
+    print(f'== {name}')
+    print()
+    print(value['description'])
+    print()
+    print('[discrete]')
+    print('=== details')
+    print()
+    print(f'Type:: {value["type"]}')
+    if 'default' in value:
+        print('Default::')
+        print('+')
+        print('----')
+        print(json.dumps(value['default'], ensure_ascii=False, separators=(',', ':')))
+        print('----')
+        print()
+    else:
+        print('No Default:: {blank}')
+    if value['readOnly']:
+        print('Read Only:: {blank}')
+    else:
+        print()
+    if 'example' in value:
+        print('Example::')
+        print('+')
+        print('----')
+        print(json.dumps(value['example'], ensure_ascii=False, separators=(',', ':')))
+        print('----')
+        print()
+    else:
+        print('No Example:: {blank}')
+    print()

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

@@ -0,0 +1,27 @@
+import json
+import sys
+
+options = json.load(sys.stdin)
+for (name, value) in options.items():
+    print('##', name.replace('<', '\\<').replace('>', '\\>'))
+    print(value['description'])
+    print()
+    if 'type' in value:
+        print('*_Type_*:')
+        print(value['type'])
+        print()
+    print()
+    if 'default' in value:
+        print('*_Default_*')
+        print('```')
+        print(json.dumps(value['default'], ensure_ascii=False, separators=(',', ':')))
+        print('```')
+    print()
+    print()
+    if 'example' in value:
+        print('*_Example_*')
+        print('```')
+        print(json.dumps(value['example'], ensure_ascii=False, separators=(',', ':')))
+        print('```')
+    print()
+    print()