rebuilding index fails

[ggthedev]

Hi
A novice user who just discovered this wonderful utility, encountered the following error while trying the -r option.
Here is the complete error info:

~ ❯ cppman -r
Indexing 'https://cplusplus.com/reference/' (depth 1)...
Exception in thread Thread-1 (_worker):
Traceback (most recent call last):
File "/usr/local/Cellar/python@3.11/3.11.4_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
self.run()
File "/usr/local/Cellar/python@3.11/3.11.4_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/crawler.py", line 248, in _worker
if self.process_document(url, content, depth):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/main.py", line 247, in process_document
keywords = self._extract_keywords(content)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/main.py", line 381, in _extract_keywords
soup = BeautifulSoup(text, "lxml")
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/bs4/init.py", line 249, in init
raise FeatureNotFound(
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
=== Done https://cplusplus.com/reference/
Indexing 'https://en.cppreference.com/w/cpp' (depth 1)...
Exception in thread Thread-2 (_worker):
Traceback (most recent call last):
File "/usr/local/Cellar/python@3.11/3.11.4_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
self.run()
File "/usr/local/Cellar/python@3.11/3.11.4_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/crawler.py", line 248, in _worker
if self.process_document(url, content, depth):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/main.py", line 247, in process_document
keywords = self._extract_keywords(content)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/cppman/main.py", line 381, in _extract_keywords
soup = BeautifulSoup(text, "lxml")
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Cellar/cppman/0.5.6/libexec/lib/python3.11/site-packages/bs4/init.py", line 249, in init
raise FeatureNotFound(
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
=== Done https://en.cppreference.com/w/cpp
~ ❯

Please let me know is the issue related to Beautifulsoup? I am able to infer, some parser for lxml is missing, but not sure which one.

[y-src]

I had the same issue and I suppose it is only present in the homebrew build as I tried with APT on Ubuntu and it works fine.
To fix the issue I installed lxml via brew - brew install python-lxml.