Mercurial > hg
view contrib/check-py3-compat.py @ 44413:4cabeea6d214
hgext: start building a library for simple hooks
Many workflows depend on hooks to enforce certain policies, e.g. to
prevent forced pushes. The Mercurial Guide includes some cases and
Google can help finding others, but it can save users a lot of time
if hg itself has a couple of examples for further customization.
Differential Revision: https://phab.mercurial-scm.org/D6825
author | Joerg Sonnenberger <joerg@bec.de> |
---|---|
date | Sat, 07 Sep 2019 14:50:39 +0200 |
parents | 2372284d9457 |
children | 9d2b2df2c2ba |
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#!/usr/bin/env python # # 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. from __future__ import absolute_import, print_function import ast import importlib import os import sys import traceback import warnings def check_compat_py2(f): """Check Python 3 compatibility for a file with Python 2""" with open(f, 'rb') as fh: content = fh.read() root = ast.parse(content) # Ignore empty files. if not root.body: return futures = set() haveprint = False for node in ast.walk(root): if isinstance(node, ast.ImportFrom): if node.module == '__future__': futures |= set(n.name for n in node.names) elif isinstance(node, ast.Print): haveprint = True if 'absolute_import' not in futures: print('%s not using absolute_import' % f) if haveprint and 'print_function' not in futures: print('%s requires print_function' % f) 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__': if sys.version_info[0] == 2: fn = check_compat_py2 else: fn = check_compat_py3 for f in sys.argv[1:]: with warnings.catch_warnings(record=True) as warns: fn(f) for w in warns: print( warnings.formatwarning( w.message, w.category, w.filename, w.lineno ).rstrip() ) sys.exit(0)