Mercurial > hg
view mercurial/encoding.py @ 12937:6ff784de7c3a stable
util: refactor opener
- Don't call atomictempfile or nlinks() if the path is malformed
(no basename). Let posixfile() raise IOError directly.
- atomictempfile already breaks up hardlinks, no need to poke
at the file with nlinks() if atomictemp.
- No need to copy the file contents to break hardlinks for 'w'rite
modes (w, wb, w+, w+b). Unlinking and recreating the file is faster.
author | Adrian Buehlmann <adrian@cadifra.com> |
---|---|
date | Thu, 04 Nov 2010 09:04:37 +0100 |
parents | eddc20306ab6 |
children | 7cc4263e07a9 |
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# encoding.py - character transcoding support for Mercurial # # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import error import unicodedata, locale, os def _getpreferredencoding(): ''' On darwin, getpreferredencoding ignores the locale environment and always returns mac-roman. http://bugs.python.org/issue6202 fixes this for Python 2.7 and up. This is the same corrected code for earlier Python versions. However, we can't use a version check for this method, as some distributions patch Python to fix this. Instead, we use it as a 'fixer' for the mac-roman encoding, as it is unlikely that this encoding is the actually expected. ''' try: locale.CODESET except AttributeError: # Fall back to parsing environment variables :-( return locale.getdefaultlocale()[1] oldloc = locale.setlocale(locale.LC_CTYPE) locale.setlocale(locale.LC_CTYPE, "") result = locale.nl_langinfo(locale.CODESET) locale.setlocale(locale.LC_CTYPE, oldloc) return result _encodingfixers = { '646': lambda: 'ascii', 'ANSI_X3.4-1968': lambda: 'ascii', 'mac-roman': _getpreferredencoding } try: encoding = os.environ.get("HGENCODING") if not encoding: encoding = locale.getpreferredencoding() or 'ascii' encoding = _encodingfixers.get(encoding, lambda: encoding)() except locale.Error: encoding = 'ascii' encodingmode = os.environ.get("HGENCODINGMODE", "strict") fallbackencoding = 'ISO-8859-1' def tolocal(s): """ Convert a string from internal UTF-8 to local encoding All internal strings should be UTF-8 but some repos before the implementation of locale support may contain latin1 or possibly other character sets. We attempt to decode everything strictly using UTF-8, then Latin-1, and failing that, we use UTF-8 and replace unknown characters. """ for e in ('UTF-8', fallbackencoding): try: u = s.decode(e) # attempt strict decoding return u.encode(encoding, "replace") except LookupError, k: raise error.Abort("%s, please check your locale settings" % k) except UnicodeDecodeError: pass u = s.decode("utf-8", "replace") # last ditch return u.encode(encoding, "replace") def fromlocal(s): """ Convert a string from the local character encoding to UTF-8 We attempt to decode strings using the encoding mode set by HGENCODINGMODE, which defaults to 'strict'. In this mode, unknown characters will cause an error message. Other modes include 'replace', which replaces unknown characters with a special Unicode character, and 'ignore', which drops the character. """ try: return s.decode(encoding, encodingmode).encode("utf-8") except UnicodeDecodeError, inst: sub = s[max(0, inst.start - 10):inst.start + 10] raise error.Abort("decoding near '%s': %s!" % (sub, inst)) except LookupError, k: raise error.Abort("%s, please check your locale settings" % k) # How to treat ambiguous-width characters. Set to 'wide' to treat as wide. ambiguous = os.environ.get("HGENCODINGAMBIGUOUS", "narrow") def colwidth(s): "Find the column width of a UTF-8 string for display" d = s.decode(encoding, 'replace') if hasattr(unicodedata, 'east_asian_width'): wide = "WF" if ambiguous == "wide": wide = "WFA" w = unicodedata.east_asian_width return sum([w(c) in wide and 2 or 1 for c in d]) return len(d)