Configure warning with Python 3.12

[targos]

$ ./configure --ninja
Node.js configure: Found Python 3.12.0...
<string>:29: SyntaxWarning: invalid escape sequence '\P'
INFO: configure completed successfully

@nodejs/python

[targos]

There are also warnings in V8 during build (this should be fixed upstream):

/Users/mzasso/git/nodejs/node/tools/v8_gypfiles/../../deps/v8/tools/gen-postmortem-metadata.py:747: SyntaxWarning: invalid escape sequence '\s'
  types[re.sub('\s*=.*', '', entry).lstrip()] = True;
/Users/mzasso/git/nodejs/node/tools/v8_gypfiles/../../deps/v8/tools/gen-postmortem-metadata.py:760: SyntaxWarning: invalid escape sequence '\s'
  args = re.split('\s*,\s*', rest);
/Users/mzasso/git/nodejs/node/tools/v8_gypfiles/../../deps/v8/tools/gen-postmortem-metadata.py:843: SyntaxWarning: invalid escape sequence '\s'
  args = re.split('\s*,\s*', rest);
/Users/mzasso/git/nodejs/node/tools/v8_gypfiles/../../deps/v8/tools/gen-postmortem-metadata.py:942: SyntaxWarning: invalid escape sequence '\s'
  ws = re.compile('\s+')

[cclauss]

This is a warning about Python raw strings...

'\P' --> r'\P'
'\s' --> r'\s'

I am high in the mountains and running out of batteries so I cannot create a pull request.

These are Warnings, not Errors but should be fixed.

[targos]

I can't find where the warning is coming from. There is no \P sequence in any .py file in the project.

[targos]

Our problem was in a gyp file: #50695

V8 CL: https://chromium-review.googlesource.com/c/v8/v8/+/5018593

[MrJithil]

The warning <string>:29: SyntaxWarning: invalid escape sequence '\P' is caused by the below line.

node/deps/openssl/openssl_common.gypi

Line 29 in 6322d4f

'OPENSSLDIR="C:\\\Program\ Files\\\Common\ Files\\\SSL"',

[targos]

@MrJithil Yes, that's what I fixed in #50695

[MrJithil]

We could either ignore this warning using warnings.filterwarnings

Or we need to modify the file opening logics to read contents as raw text or proper escapes.

Since this is coming from the dependancy, I prefer to ignore this specific warning. Because, I am confused on escaping every deps file is good or not.

To ignore this warning
warnings.filterwarnings("ignore", r"invalid escape sequence", category=SyntaxWarning) at the top of the configure.py

[MrJithil]

I drafted this comment early today, and submitted now. Thanks for that.

[cclauss]

The warning is useful and it should not be ignored. It will become a SyntaxError in the future so let's solve instead of hide.
https://docs.python.org/3.12/whatsnew/3.12.html#other-language-changes