Mercurial > public > mercurial-scm > hg
comparison mercurial/util.py @ 20542:be27652675ce
util: debugstacktrace, flush before and after writing
Close another stream (default stdout, which often is buffered) before writing
to the primary stream (default stderr, which often is unbuffered). The primary
stream is also flushed after writing (in case it is buffered).
This fixes non-deterministic output order, especially on windows.
| author | Mads Kiilerich <madski@unity3d.com> |
|---|---|
| date | Thu, 20 Feb 2014 02:38:36 +0100 |
| parents | 0889585b44f1 |
| children | 0916f829eb8d |
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| 20541:44dcca9be1d5 | 20542:be27652675ce |
|---|---|
| 1987 def __call__(self, *args): | 1987 def __call__(self, *args): |
| 1988 self._hooks.sort(key=lambda x: x[0]) | 1988 self._hooks.sort(key=lambda x: x[0]) |
| 1989 for source, hook in self._hooks: | 1989 for source, hook in self._hooks: |
| 1990 hook(*args) | 1990 hook(*args) |
| 1991 | 1991 |
| 1992 def debugstacktrace(msg='stacktrace', skip=0, f=sys.stderr): | 1992 def debugstacktrace(msg='stacktrace', skip=0, f=sys.stderr, otherf=sys.stdout): |
| 1993 '''Writes a message to f (stderr) with a nicely formatted stacktrace. | 1993 '''Writes a message to f (stderr) with a nicely formatted stacktrace. |
| 1994 Skips the 'skip' last entries. | 1994 Skips the 'skip' last entries. By default it will flush stdout first. |
| 1995 It can be used everywhere and do intentionally not require an ui object. | 1995 It can be used everywhere and do intentionally not require an ui object. |
| 1996 Not be used in production code but very convenient while developing. | 1996 Not be used in production code but very convenient while developing. |
| 1997 ''' | 1997 ''' |
| 1998 if otherf: | |
| 1999 otherf.flush() | |
| 1998 f.write('%s at:\n' % msg) | 2000 f.write('%s at:\n' % msg) |
| 1999 entries = [('%s:%s' % (fn, ln), func) | 2001 entries = [('%s:%s' % (fn, ln), func) |
| 2000 for fn, ln, func, _text in traceback.extract_stack()[:-skip - 1]] | 2002 for fn, ln, func, _text in traceback.extract_stack()[:-skip - 1]] |
| 2001 if entries: | 2003 if entries: |
| 2002 fnmax = max(len(entry[0]) for entry in entries) | 2004 fnmax = max(len(entry[0]) for entry in entries) |
| 2003 for fnln, func in entries: | 2005 for fnln, func in entries: |
| 2004 f.write(' %-*s in %s\n' % (fnmax, fnln, func)) | 2006 f.write(' %-*s in %s\n' % (fnmax, fnln, func)) |
| 2007 f.flush() | |
| 2005 | 2008 |
| 2006 # convenient shortcut | 2009 # convenient shortcut |
| 2007 dst = debugstacktrace | 2010 dst = debugstacktrace |