Mercurial > hg
view contrib/check-py3-compat.py @ 49370:1572f790ee5e stable
convert: remove old ElementTree import cruft from darcs
All the `import elementtree` attempts seem to pre-date py2.5, when it was
brought into the standard library, and the manual `cElementTree` fast
implementation import has been unnecessary and deprecated since py3.3.
author | Ian Moody <moz-ian@perix.co.uk> |
---|---|
date | Wed, 15 Jun 2022 01:01:02 +0100 |
parents | 13dfad0f9f7a |
children |
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#!/usr/bin/env python3 # # check-py3-compat - check Python 3 compatibility of Mercurial files # # Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import ast import importlib import os import sys import traceback import warnings def check_compat_py3(f): """Check Python 3 compatibility of a file with Python 3.""" with open(f, 'rb') as fh: content = fh.read() try: ast.parse(content, filename=f) except SyntaxError as e: print('%s: invalid syntax: %s' % (f, e)) return # Try to import the module. # For now we only support modules in packages because figuring out module # paths for things not in a package can be confusing. if f.startswith( ('hgdemandimport/', 'hgext/', 'mercurial/') ) and not f.endswith('__init__.py'): assert f.endswith('.py') name = f.replace('/', '.')[:-3] try: importlib.import_module(name) except Exception as e: exc_type, exc_value, tb = sys.exc_info() # We walk the stack and ignore frames from our custom importer, # import mechanisms, and stdlib modules. This kinda/sorta # emulates CPython behavior in import.c while also attempting # to pin blame on a Mercurial file. for frame in reversed(traceback.extract_tb(tb)): if frame.name == '_call_with_frames_removed': continue if 'importlib' in frame.filename: continue if 'mercurial/__init__.py' in frame.filename: continue if frame.filename.startswith(sys.prefix): continue break if frame.filename: filename = os.path.basename(frame.filename) print( '%s: error importing: <%s> %s (error at %s:%d)' % (f, type(e).__name__, e, filename, frame.lineno) ) else: print( '%s: error importing module: <%s> %s (line %d)' % (f, type(e).__name__, e, frame.lineno) ) if __name__ == '__main__': # check_compat_py3 will import every filename we specify as long as it # starts with one of a few prefixes. It does this by converting # specified filenames like 'mercurial/foo.py' to 'mercurial.foo' and # importing that. When running standalone (not as part of a test), this # means we actually import the installed versions, not the files we just # specified. When running as test-check-py3-compat.t, we technically # would import the correct paths, but it's cleaner to have both cases # use the same import logic. sys.path.insert(0, os.getcwd()) for f in sys.argv[1:]: with warnings.catch_warnings(record=True) as warns: check_compat_py3(f) for w in warns: print( warnings.formatwarning( w.message, w.category, w.filename, w.lineno ).rstrip() ) sys.exit(0)