docs: Prefix url replacements with site-url in replace-urls.py preprocessor

Author: Zeglius

docs/preprocessors/replace-urls.py

@@ -1,17 +1,18 @@
 __doc__ = """Replace urls across the entire book"""
 
-from copy import copy
 import glob
 import json
 from pathlib import Path
 import sys
 
-from typing import cast
+from typing import List, cast
 from urllib.parse import urlparse
 
-from libs.utils import Utils, debug as _debug
+from libs.utils import debug as _debug
 from libs.types import MdBook
 
+PREPROCESSOR_NAME = "replace-urls"
+
 
 def debug(*obj):
     return _debug("REPLACE-URLS:", *obj)
@@ -35,25 +36,40 @@ def is_url(url) -> bool:
     return res
 
 
-if __name__ == "__main__":
+def main():
     if len(sys.argv) > 1:
         if sys.argv[1] == "supports":
             sys.exit(0)
     context, book = json.load(sys.stdin)
 
     book = MdBook(book)
 
-    config = Utils.get_config_from_ctx("replace-urls", context)
+    config = context["config"]["preprocessor"][PREPROCESSOR_NAME]
     if not config:
         print(json.dumps(book._data))
         exit(0)
     elif not isinstance(config, dict):
         print(json.dumps(book._data))
         exit(0)
 
+    book_src = cast(str, context["config"]["book"]["src"])
+
+    # Prefix to append to replaced urls if output.html.site-url is set and the replacement starts with `/`
+    site_url_prefix = ""
+    _output_html_site_url = None
+    try:
+        _aux = context["config"]["output"]["html"]["site-url"]
+        _output_html_site_url = _aux
+    except Exception as _:
+        pass
+    site_url_prefix = (
+        _output_html_site_url.rstrip("/").lstrip("/") if _output_html_site_url else ""
+    )
+    del _output_html_site_url
+
     ignore_paths_list_globs = cast(list[str], list(config.get("ignore") or []))
-    ignore_paths: list[str] = []
-    root_dir = Path(context["root"], context["config"]["book"]["src"])
+    ignore_paths: List[str] = list()
+    root_dir = Path(context["root"], book_src)
     for p in ignore_paths_list_globs:
         ignore_paths += glob.glob(p, root_dir=root_dir)
 
@@ -62,11 +78,20 @@ def is_url(url) -> bool:
     config_mappings: dict = config["mappings"]
 
     # Get the url mappings
+    # If replacement starts with `/`, prepend
     url_mappings: list[tuple[str, str]] = [
         (k, v)
         for k, v in config_mappings.items()
         if k not in _IGNORE_STRINGS and is_url(k)
     ]
+    url_mappings = list(
+        map(
+            lambda m: (
+                (m[0], site_url_prefix + m[1]) if cast(str, m[1]).startswith("/") else m
+            ),
+            url_mappings,
+        )
+    )
 
     # Replace the urls
     # book_s = json.dumps(book)
@@ -84,7 +109,10 @@ def is_url(url) -> bool:
             continue
 
         for old_url, new_url in url_mappings:
-            old = copy(section.chapter.content)
             section.chapter.content = section.chapter.content.replace(old_url, new_url)
 
     print(json.dumps(book._data))
+
+
+if __name__ == "__main__":
+    main()