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diff --git a/swh/web/common/highlightjs.py b/swh/web/common/highlightjs.py
--- a/swh/web/common/highlightjs.py
+++ b/swh/web/common/highlightjs.py
@@ -12,25 +12,35 @@
from django.contrib.staticfiles.finders import find
-with open(str(find("json/highlightjs-languages.json")), "r") as _hljs_languages_file:
- _hljs_languages_data = json.load(_hljs_languages_file)
+
+@functools.lru_cache()
+def _hljs_languages_data():
+ with open(str(find("json/highlightjs-languages.json")), "r") as hljs_languages_file:
+ return json.load(hljs_languages_file)
+
# set of languages ids that can be highlighted by highlight.js library
-_hljs_languages = set(_hljs_languages_data["languages"])
+@functools.lru_cache()
+def _hljs_languages():
+ return set(_hljs_languages_data()["languages"])
+
# languages aliases defined in highlight.js
-_hljs_languages_aliases = {
- **_hljs_languages_data["languages_aliases"],
- "ml": "ocaml",
- "bsl": "1c",
- "ep": "mojolicious",
- "lc": "livecode",
- "p": "parser3",
- "pde": "processing",
- "rsc": "routeros",
- "s": "armasm",
- "sl": "rsl",
-}
+@functools.lru_cache()
+def _hljs_languages_aliases():
+ return {
+ **_hljs_languages_data()["languages_aliases"],
+ "ml": "ocaml",
+ "bsl": "1c",
+ "ep": "mojolicious",
+ "lc": "livecode",
+ "p": "parser3",
+ "pde": "processing",
+ "rsc": "routeros",
+ "s": "armasm",
+ "sl": "rsl",
+ }
+
# dictionary mapping pygment lexers to hljs languages
_pygments_lexer_to_hljs_language = {} # type: Dict[str, str]
@@ -68,7 +78,7 @@
lang_mime_types = lexer[3]
lang = None
for lang_alias in lang_aliases:
- if lang_alias in _hljs_languages:
+ if lang_alias in _hljs_languages():
lang = lang_alias
_pygments_lexer_to_hljs_language[lexer_name] = lang_alias
break
@@ -94,16 +104,16 @@
filename_lower = filename.lower()
if filename_lower in _filename_to_hljs_language:
return _filename_to_hljs_language[filename_lower]
- if filename_lower in _hljs_languages:
+ if filename_lower in _hljs_languages():
return filename_lower
exts = filename_lower.split(".")
# check if file extension matches an hljs language
# also handle .ext.in cases
for ext in reversed(exts[-2:]):
- if ext in _hljs_languages:
+ if ext in _hljs_languages():
return ext
- if ext in _hljs_languages_aliases:
- return _hljs_languages_aliases[ext]
+ if ext in _hljs_languages_aliases():
+ return _hljs_languages_aliases()[ext]
# otherwise use Pygments language database
lexer = None
@@ -121,8 +131,8 @@
if lexer:
exts = [ext.replace("*.", "") for ext in lexer.filenames]
for ext in exts:
- if ext in _hljs_languages_aliases:
- return _hljs_languages_aliases[ext]
+ if ext in _hljs_languages_aliases():
+ return _hljs_languages_aliases()[ext]
return None
@@ -151,4 +161,4 @@
Returns:
List[str]: the list of supported languages
"""
- return sorted(list(_hljs_languages))
+ return sorted(list(_hljs_languages()))

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